ATA 26 - Fire Protection PDF - Bombardier DHC 8-400 (PWC PW150) - January 2023

BOMBARDIER DHC 8-400 (PWC PW150) ATA 26 - FIRE PROTECTION TO BE USED FOR MAINTENANCE TRAINING PURPOSES ONLY B1/B2 MAINTENANCE TRAINING MANUAL Issue 6 - January 2023 Page 1 of 78 BOMBARDIER DHC 8-400 (PWC PW150) FIRE PROTECTION The extinguishing system has: PURPOSE The fire protection system i...

BOMBARDIER DHC 8-400 (PWC PW150) ATA 26 - FIRE PROTECTION TO BE USED FOR MAINTENANCE TRAINING PURPOSES ONLY B1/B2 MAINTENANCE TRAINING MANUAL Issue 6 - January 2023 Page 1 of 78 BOMBARDIER DHC 8-400 (PWC PW150) FIRE PROTECTION The extinguishing system has: PURPOSE The fire protection system includes components throughout the aircraft to provide detection, extinguishing and indication of fire conditions. • • • • • Nacelle Fire Extinguishing Baggage Compartment Fire Extinguishing APU Fire Extinguishing Lavatory Fire Extinguishing Portable Hand-Operated Fire Extinguishers GENERAL DESCRIPTION Fire detection and extinguishing systems are provided for: • • • • Nacelles Auxiliary Power Unit (APU Optional) Baggage Compartments Lavatory Portable fire bottles are provided for the passenger compartment. Indication and test functions are provided for the fire protection system on the fire protection panel in the flight compartment for: • • • Engines Auxiliary Power Unit Forward and Aft Baggage Compartments Indication is provided at the cabin repeater lights for lavatory smoke and fire detection. The fire protection system has these sub-systems: • • Detection Extinguishing The detection system has: • • • • Nacelle fire detection system Smoke Detection System Lavatory Smoke Detection System APU fire detection TO BE USED FOR MAINTENANCE TRAINING PURPOSES ONLY ATA 26 - FIRE PROTECTION Issue 6 -January 2023 Page 2 of 78 BOMBARDIER DHC 8-400 (PWC PW150) FIRE PROTECTION - FIRE PROTECTION SYSTEM GENERAL LOCATOR TO BE USED FOR MAINTENANCE TRAINING PURPOSES ONLY ATA 26 - FIRE PROTECTION Issue 6 -January 2023 Page 3 of 78 BOMBARDIER DHC 8-400 (PWC PW150) FIRE PROTECTION - FIRE PROTECTION BLOCK DIAGRAM TO BE USED FOR MAINTENANCE TRAINING PURPOSES ONLY ATA 26 - FIRE PROTECTION Issue 6 -January 2023 Page 4 of 78 BOMBARDIER DHC 8-400 (PWC PW150) INTENTIONALLY LEFT BLANK TO BE USED FOR MAINTENANCE TRAINING PURPOSES ONLY ATA 26 - FIRE PROTECTION Issue 6 -January 2023 Page 5 of 78 BOMBARDIER DHC 8-400 (PWC PW150) FIRE PROTECTION CONTROL AMPLIFIER PURPOSE The control amplifier performs fire detection and extinguishing system monitoring and test functions. The Fire Protection System (FPS) control amplifier is located on No. 2 equipment panel. The fire protection system control amplifier does the following: • • • • • Detection and extinguishing monitoring Built In Tests (BIT) function Controls the advisory lights on the Fire Protection Panel Controls the CHECK FIRE DET warning light on the Caution and Warning panel Controls the fire bell chime optional TO BE USED FOR MAINTENANCE TRAINING PURPOSES ONLY ATA 26 - FIRE PROTECTION Issue 6 -January 2023 Page 6 of 78 BOMBARDIER DHC 8-400 (PWC PW150) FIRE PROTECTION - CONTROL AMPLIFIER TO BE USED FOR MAINTENANCE TRAINING PURPOSES ONLY ATA 26 - FIRE PROTECTION Issue 6 -January 2023 Page 7 of 78 BOMBARDIER DHC 8-400 (PWC PW150) FIRE PROTECTION The FAULT A or FAULT B light on the Fire Protection Panel in the flight compartment comes on. NACELLE FIRE DETECTION SYSTEM PURPOSE The engine fire detection system supplies indications of fire and overheat conditions for engine fire zones. GENERAL DESCRIPTION Three Advanced Pneumatic Detectors (APD) are located in each nacelle (left and right) to give fire and overheat detection. The nacelle fire detection system has one APD located in the engine primary zone (LEZ), one located around the Propeller Electronic Control unit (PEZ) and one located in the Main Wheel Well (MWW) zone. A fire or overheat condition in the nacelles is shown on the Fire Protection Panel (FPP). The nacelle fire detection system has these components: • • • Engine Leading Edge Zone Advance Pneumatic Detectors Propeller Electronic Control Advance Pneumatic Detectors MLG Zone Advance Pneumatic Detectors SUB-SYSTEM DESCRIPTION The Advanced Pneumatic Detectors (APD) use gas filled sensor tubes to monitor heating of the zone. The fault and alarms signals are supplied by two switches, the integrity switch and the alarm switch. The integrity switch monitors the pressure of the sensor element. If the pressure falls below a minimum rated level, the normally closed switch opens and sends a signal to the control amplifier. TO BE USED FOR MAINTENANCE TRAINING PURPOSES ONLY ATA 26 - FIRE PROTECTION Issue 6 -January 2023 Page 8 of 78 BOMBARDIER DHC 8-400 (PWC PW150) FIRE PROTECTION - NACELLE FIRE DETECTION SYSTEM TO BE USED FOR MAINTENANCE TRAINING PURPOSES ONLY ATA 26 - FIRE PROTECTION Issue 6 -January 2023 Page 9 of 78 BOMBARDIER DHC 8-400 (PWC PW150) FIRE PROTECTION NACELLE FIRE DETECTION SYSTEM SUB-SYSTEM DESCRIPTION A fire or overheat condition will cause gas expansion within the APD. When the temperature reaches a set level the pressure of the expanding gas closes the alarm switch. The APD will generate a fire signal to the appropriate engine PULL FUEL/HYD OFF handle light directly. When the alarm switch closes it also sends the signal to the control amplifier and is indicated by: • • • • PULL FUEL/HYD OFF handle light red on FPP comes on CHECK FIRE DET warning light flashing red on the Caution and Warning panel comes on ENGINE FIRE PRESS TO RESET light flashing red on the left and right side of the glare-shield comes on Audible BELL warning sounds Pushing either the left or right ENGINE FIRE PRESS TO RESET indicator turns the audible BELL warning off. Both ENGINE FIRE PRESS TO RESET remains on steady state for the duration of the alarm condition. TO BE USED FOR MAINTENANCE TRAINING PURPOSES ONLY ATA 26 - FIRE PROTECTION Issue 6 -January 2023 Page 10 of 78 BOMBARDIER DHC 8-400 (PWC PW150) FIRE PROTECTION - FIRE PROTECTION PANEL DETAIL FOR NACELLE FIRE TO BE USED FOR MAINTENANCE TRAINING PURPOSES ONLY ATA 26 - FIRE PROTECTION Issue 6 -January 2023 Page 11 of 78 BOMBARDIER DHC 8-400 (PWC PW150) FIRE PROTECTION The sensor loops in PEZ and LEZ are connected in series with the control amplifier in such a manner that if the loop in PEZ fails, fire zone LEZ loop will still provide fire indications. However if the LEZ loop fails, PEZ will not function as a fire detector. It is therefore possible to receive a FAULT A indication and an engine fire warning concurrently. NACELLE FIRE DETECTION SYSTEM ADVANCE PNEUMATIC DETECTORS (APD) PURPOSE The Advance Pneumatic Detectors are used to sense a fire or overheat condition. Three Advance Pneumatic Detectors (APD) are located in each nacelle. The APD or fire detection loops, give fire and overheat detection in: • • • The Main Wheel Well (MWW) zone The Leading Edge Zone (LEZ) The Propeller Electronic Controller (PEC) Zone of the primary engine zone (PEZ) A fire or overheat condition in the nacelles is shown on the Fire Protection Panel (FPP). The APD receives electrical power from the 28V DC left essential or right essential bus. Malfunction of either the left or right essential bus will not cause loss of fire detection in the left or right engine nacelle. The APD are sensor tubes filled with helium gas to monitor for fires. The helium gas is sensitive to changes in pressure and it expands as the pressure increases. Spot heat releases hydrogen from central core which increases pressure in the loop. The fault and alarm signals are given by two switches, the integrity switch and the alarm switch. The alarm switch is normally open, and closes when an overheat or fire condition occurs, caused by the expanding gas pressure increase in the APD. The APD alarm switch signals the appropriate engine PULL FUEL/HYD OFF handle light directly. The alarm signals are processed by the control amplifier then sent to the fire protection panel. The integrity switch monitors the pressure of the sensor element. If an APD breaks, the loss of pressure in the sensor will turn on the FAULT A or FAULT B light on the fire protection panel. TO BE USED FOR MAINTENANCE TRAINING PURPOSES ONLY ATA 26 - FIRE PROTECTION Issue 6 -January 2023 Page 12 of 78 BOMBARDIER DHC 8-400 (PWC PW150) FIRE PROTECTION - ADVANCED PNEUMATIC DETECTOR (APD) TO BE USED FOR MAINTENANCE TRAINING PURPOSES ONLY ATA 26 - FIRE PROTECTION Issue 6 -January 2023 Page 13 of 78 BOMBARDIER DHC 8-400 (PWC PW150) FIRE PROTECTION NACELLE FIRE DETECTION SYSTEM ADVANCE PNEUMATIC DETECTORS (APD) CONTINUED SYSTEM TESTS To test the NACELLE FIRE DETECTION SYSTEM, select the two position, spring loaded to centre test switch on the FPP to either ENGINE 1 or ENGINE 2. Any nacelle APD will cause the PULL FUEL/HYD OFF handle to illuminate. During test, the master WARNING PRESS TO RESET, CHECK FIRE DET warning light, audible fire bell, FPP FAULT A and FAULT B lights and the ENGINE FIRE PRESS TO RESET advisory lights come on. The ENGINE FIRE PRESS TO RESET advisory lights will only come on if correct response is obtained from all three nacelle APD and the control amplifier is functioning normally. Pushing either ENGINE FIRE PRESS TO RESET advisory light will silence the fire bell. The following are nacelle fire detection test indications: • • • • • • Master WARNING PRESS TO RESET light red on the glare-shield comes on and flashes CHECK FIRE DETECT warning light(red on the Caution and Warning panel comes on and flashes Both ENGINE FIRE PRESS TO RESET lights red on the glare-shield come on and flash PULL FUEL/HYD OFF light red on the PULL FUEL/HYD OFF handle come on FAULT A and B lights amber on the Fire Protection Panel come on FIRE BELL audible warning comes on TO BE USED FOR MAINTENANCE TRAINING PURPOSES ONLY ATA 26 - FIRE PROTECTION Issue 6 -January 2023 Page 14 of 78 BOMBARDIER DHC 8-400 (PWC PW150) FIRE PROTECTION - CHECK FIRE DETECT WARNING LIGHT TO BE USED FOR MAINTENANCE TRAINING PURPOSES ONLY ATA 26 - FIRE PROTECTION Issue 6 -January 2023 Page 15 of 78 BOMBARDIER DHC 8-400 (PWC PW150) FIRE PROTECTION NACELLE FIRE DETECTION SYSTEM ADVANCE PNEUMATIC DETECTORS (APD) CONTINUED TRAINING INFORMATION POINTS Care must be taken during the installation and removal of the APD. Any damage to the sensor tube can result in a leak of the inert gas which will result in APD sensor failure. TO BE USED FOR MAINTENANCE TRAINING PURPOSES ONLY ATA 26 - FIRE PROTECTION Issue 6 -January 2023 Page 16 of 78 BOMBARDIER DHC 8-400 (PWC PW150) INTENTIONALLY LEFT BLANK TO BE USED FOR MAINTENANCE TRAINING PURPOSES ONLY ATA 26 - FIRE PROTECTION Issue 6 -January 2023 Page 17 of 78 BOMBARDIER DHC 8-400 (PWC PW150) FIRE PROTECTION SMOKE DETECTION SYSTEM PURPOSE The smoke detection system monitors the baggage and lavatory areas for smoke conditions. GENERAL DESCRIPTION Smoke detection is done by smoke detectors which are installed in the baggage compartment, the baggage area and the lavatory. If a smoke or fire condition is sensed, the applicable warning indicator lights on the Fire Protection Panel (FPP) or the passenger compartment ceiling repeater lights come on. The Smoke Detection System has the components that follow: • • • Baggage Smoke Detectors Baggage Smoke Detector Lavatory Smoke Detector TO BE USED FOR MAINTENANCE TRAINING PURPOSES ONLY ATA 26 - FIRE PROTECTION Issue 6 -January 2023 Page 18 of 78 BOMBARDIER DHC 8-400 (PWC PW150) FIRE PROTECTION - BAGGAGE COMPARTMENT SMOKE DETECTORS LOCATION TO BE USED FOR MAINTENANCE TRAINING PURPOSES ONLY ATA 26 - FIRE PROTECTION Issue 6 -January 2023 Page 19 of 78 BOMBARDIER DHC 8-400 (PWC PW150) FIRE PROTECTION SMOKE DETECTION SYSTEM SUB-SUB-SYSTEM DESCRIPTION The baggage smoke detectors are monitored by the control amplifier. The lavatory smoke detector is monitored by the repeater lights in the passenger compartment ceiling. Each baggage smoke detector directly turns on the applicable AFT or FWD SMOKE (red) FPP advisory light. If a smoke or fire condition is sensed, the alarm signal is also sent to the control amplifier. The control amplifier turns on the SMOKE warning light, master WARNING PRESS TO RESET switch and applicable FPP AFT or FWD BOTTLE ARM amber)light. The lavatory smoke detector alarm signal switches on the detector Light Emitting Diode (LED) and the audio alert located on the detector. Smoke in the lavatory compartment will also cause the passenger compartment ceiling repeater lights to come on and a single audible warning high chime in the passenger address system will sound. TO BE USED FOR MAINTENANCE TRAINING PURPOSES ONLY ATA 26 - FIRE PROTECTION Issue 6 -January 2023 Page 20 of 78 BOMBARDIER DHC 8-400 (PWC PW150) FIRE PROTECTION - FIRE PROTECTION BLOCK DIAGRAM TO BE USED FOR MAINTENANCE TRAINING PURPOSES ONLY ATA 26 - FIRE PROTECTION Issue 6 -January 2023 Page 21 of 78 BOMBARDIER DHC 8-400 (PWC PW150) FIRE PROTECTION SMOKE DETECTION SYSTEM SUB-SUB-SYSTEM DESCRIPTION Smoke detection in the forward baggage compartment is annunciated by: • • • • • • SMOKE red warning light on the Caution and Warning panel comes on flashes Master WARNING PRESS TO RESET light on the glare-shield comes on and flashes BAGGAGE FWD SMOKE red advisory light, on the Fire Protection panel, comes on FWD FIRE BOTTLE ARM amber light on the Fire Protection Panel comes on BAGGAGE FWD EXTG white switch light on the Fire Protection Panel comes on Three chimes TO BE USED FOR MAINTENANCE TRAINING PURPOSES ONLY ATA 26 - FIRE PROTECTION Issue 6 -January 2023 Page 22 of 78 BOMBARDIER DHC 8-400 (PWC PW150) APU FUEL VALVE BTL EXTG AFT BTL FUEL OPEN CLOSED OPEN CLOSED ARM EXTG FIRE FIRE TEST BTL LOW FAULT HYD FAULT B ENGINE 1 PULL FUEL/HYD OFF AFT FWD BTL HYD CLOSED FAULT A FAULT B ENGINE 2 TEST DETECTION SMOKE VENT VALVE INLT OTLT OPEN CLOSED BTL LOW FWD BTL FAULT A EXTG AFT BTL FUEL PULL FUEL/HYD OFF EXTG 1 TEST 2 FIRE BOTTLE AFT ARM LOW AFT FWD ARM LOW FWD BAGGAGE FWD TEST SMOKE EXTG FIRE PROTECTION - FIRE PROTECTION PANEL FOR FWD BAGGAGE SMOKE DETECTION TO BE USED FOR MAINTENANCE TRAINING PURPOSES ONLY ATA 26 - FIRE PROTECTION Issue 6 -January 2023 Page 23 of 78 BOMBARDIER DHC 8-400 (PWC PW150) FIRE PROTECTION SMOKE DETECTION SYSTEM SUB-SUB-SYSTEM DESCRIPTION Smoke detection in the aft baggage compartment is annunciated by: • • • • • • • SMOKE (red) warning light on the Caution and Warning panel comes on flashes Master WARNING PRESS TO RESET light on the glare-shield comes on and flashes BAGGAGE AFT SMOKE red advisory light, on the Fire Protection panel, comes on AFT FIRE BOTTLE ARM amber light on the Fire Protection Panel comes on. VENT INLT and VENT OTLT lights on the Fire Protection Panel comes on for aft baggage compartment only. BAGGAGE AFT EXTG white switch light on the Fire Protection Panel comes on 3 chimes TO BE USED FOR MAINTENANCE TRAINING PURPOSES ONLY ATA 26 - FIRE PROTECTION Issue 6 -January 2023 Page 24 of 78 BOMBARDIER DHC 8-400 (PWC PW150) FIRE PROTECTION - FIRE PROTECTION PANEL FOR AFT BAGGAGE SMOKE DETECTION TO BE USED FOR MAINTENANCE TRAINING PURPOSES ONLY ATA 26 - FIRE PROTECTION Issue 6 -January 2023 Page 25 of 78 BOMBARDIER DHC 8-400 (PWC PW150) FIRE PROTECTION Electrical connections are provided using an external 66 pin connector, keyed to eliminate mis-matching. During a fire or smoke condition, the smoke detector causes an alarm based on a predetermined trip set point. This causes the SMOKE indicator light on the FPP to come on. SMOKE DETECTION SYSTEM AFT BAGGAGE SMOKE DETECTORS The baggage smoke detector has a Built-In Test capability that completely tests its functionality in response to a test signal from the FPP. PURPOSE NOTES: The AFT Baggage Smoke Detectors sense the presence of smoke in the aft baggage compartment Two baggage smoke detectors are located at the front and back of the aft baggage bay area. Each baggage smoke detector is a self-contained open area detector. Electrical connections are provided using an external 66 pin connector keyed to eliminate mismatching. During a fire or smoke condition, one or both smoke detectors produce an alarm based on a predetermined trip set point. The smoke detectors are photosensitive devices that use a light beam that detects smoke particles when the beam is interrupted. The LED is replaceable on these units. This causes the SMOKE indicator light on the FPP to come on. The control amplifier will automatically operate relay contacts to remove electrical power from the AFT baggage vent inlet and vent outlet valves to minimize airflow within the bay. Indication of vent valve status will be shown as VENT INLT and VENT OTLT CLOSED white lights on the FPP. The baggage smoke detectors have a Built-In Test capability that completely tests their functionality in response to a test signal from the FPP. FWD BAGGAGE SMOKE DETECTOR PURPOSE The FWD Baggage Smoke Detector senses the presence of smoke in the forward baggage compartment. The baggage smoke detector is a self-contained open area detector. The baggage smoke detector is a line replaceable unit (LRU). The baggage smoke detector is located in the forward baggage compartment. TO BE USED FOR MAINTENANCE TRAINING PURPOSES ONLY ATA 26 - FIRE PROTECTION Issue 6 -January 2023 Page 26 of 78 BOMBARDIER DHC 8-400 (PWC PW150) FIRE PROTECTION - SMOKE DETECTORS TO BE USED FOR MAINTENANCE TRAINING PURPOSES ONLY ATA 26 - FIRE PROTECTION Issue 6 -January 2023 Page 27 of 78 BOMBARDIER DHC 8-400 (PWC PW150) FIRE PROTECTION SMOKE DETECTION SYSTEM LAVATORY SMOKE DETECTOR PURPOSE The Lavatory Smoke Detector senses the presence of smoke in the lavatory. The lavatory smoke detector is a self-contained open area detector. The lavatory smoke detector is a line replaceable unit (LRU). The smoke detector is installed on the lavatory ceiling. Electrical connection is made through a D-style connector. During a fire or smoke condition, or self test activation, the smoke detector produces: • • • • • A local smoke detector red alarm Light Emitting Diode (LED) light Local audible alarm An indication on the cabin repeater lamps (red and steady) One high chime in the Passenger Address Communication Interphone System (PACIS) The lavatory smoke detector is tested in response to a signal from a self test pushbutton switch on the detector itself. The test must be reset with the lavatory smoke detector Interrupt push-button. TO BE USED FOR MAINTENANCE TRAINING PURPOSES ONLY ATA 26 - FIRE PROTECTION Issue 6 -January 2023 Page 28 of 78 BOMBARDIER DHC 8-400 (PWC PW150) FIRE PROTECTION - LAVATORY SMOKE DETECTOR TO BE USED FOR MAINTENANCE TRAINING PURPOSES ONLY ATA 26 - FIRE PROTECTION Issue 6 -January 2023 Page 29 of 78 BOMBARDIER DHC 8-400 (PWC PW150) FIRE PROTECTION SMOKE DETECTION SYSTEM SYSTEM TESTS The baggage compartment smoke test produces exactly the same response as a smoke detection event. The aft baggage compartment test switch is a two-position toggle switch TEST 1/TEST 2. During TEST 1 the aft baggage smoke detector is tested. During TEST 2 the aft baggage forward smoke detector is tested. During TEST 1/TEST 2 the following is annunciated: • • • • • SMOKE red warning light on the Caution and Warning panel comes on Master WARNING PRESS TO RESET light on the glare-shield comes on and flashes BAGGAGE AFT SMOKE red advisory light, on the Fire Protection panel, comes on AFT FIRE BOTTLE ARM amber light on the Fire Protection Panel comes on VENT INLT and VENT OTLT lights on the Fire Protection Panel come on for the aft baggage compartment only The forward baggage compartment test switch is a push button test switch. During the forward baggage compartment test the following is annunciated: • • • • SMOKE red warning light on the Caution and Warning Panel comes on Master WARNING PRESS TO RESET light on the glare-shield comes on and flashes BAGGAGE FWD SMOKE red advisory light, on the Fire Protection panel, comes on FIRE BOTTLE FWD ARM amber light on the Fire Protection Panel comes on TO BE USED FOR MAINTENANCE TRAINING PURPOSES ONLY ATA 26 - FIRE PROTECTION Issue 6 -January 2023 Page 30 of 78 BOMBARDIER DHC 8-400 (PWC PW150) INTENTIONALLY LEFT BLANK TO BE USED FOR MAINTENANCE TRAINING PURPOSES ONLY ATA 26 - FIRE PROTECTION Issue 6 -January 2023 Page 31 of 78 BOMBARDIER DHC 8-400 (PWC PW150) FIRE PROTECTION The integrity switch monitors the pressure of the sensor element. If an APD breaks, the loss of pressure will open the integrity switch and signal the control amplifier to turn on the FPP APU FAULT light. APU FIRE DETECTION SYSTEM PURPOSE The Auxiliary Power Unit (APU) fire detection system senses fire or overheat conditions in the APU compartment. GENERAL DESCRIPTION The APU fire detection system has one Advance Pneumatic Detector (APD) located in the APU compartment which senses changes in temperature. The APU fire detection system has the component that follows: • APU Compartment Advance Pneumatic Detector. SUB-SUB-SYSTEM DESCRIPTION There is one APD located in the APU compartment. The APD has a main element body and a sensor tube which extends around the APU compartment. The main element body is held in place by two P-clamps and the sensor tube is supported by additional clamps and grommets. The sensor tube is filled with an inert gas which is sensitive to changes in temperature. The APD receives electrical power from the right essential bus. Two switches alarm and fault are integral in the APD. The alarm switch is normally open and closes when an overheat or fire condition occurs, caused by the pressure increase in the APD. The APD alarm switch signals the FPP APU FIRE red advisory light directly. The FPP FIRE red advisory remains on steady state for the duration of the alarm. The alarm signals are processed by the control amplifier then sent to the Fire Protection Panel (FPP). TO BE USED FOR MAINTENANCE TRAINING PURPOSES ONLY ATA 26 - FIRE PROTECTION Issue 6 -January 2023 Page 32 of 78 BOMBARDIER DHC 8-400 (PWC PW150) FIRE PROTECTION - APU FIRE DETECTION DETAIL TO BE USED FOR MAINTENANCE TRAINING PURPOSES ONLY ATA 26 - FIRE PROTECTION Issue 6 -January 2023 Page 33 of 78 BOMBARDIER DHC 8-400 (PWC PW150) • • FIRE PROTECTION APU FIRE DETECTION SYSTEM • BTL LOW amber light on the Fire Protection Panel comes on The shutdown signal to the APU FADEC and the APU fuel shut off valve circuits are also tested and the APU shuts down Fire Bell optional SUB-SUB-SYSTEM DESCRIPTION When a fire or overheat is sensed the control amplifier performs the following: • • • • • • • • APU FIRE red light on the Fire Protection Panel comes on CHECK FIRE DET red warning light on the Caution and Warning panel comes on and flashes Master WARNING PRESS TO RESET red light on the glare-shield comes on and flashes APU BTL ARM amber light on the Fire Protection Panel comes on APU FUEL OPEN green advisory light on the Fire Protection Panel goes off APU FUEL CLOSED white light on the Fire Protection Panel comes on EXTG white switch light on the Fire Protection Panel comes on Fire Bell optional When a fire or overheat is sensed, the APU will automatically shut down and the FAIL advisory light on the APU control panel will come on. SYSTEM TESTS To test the APU Fire Protection System, the FPP APU FIRE TEST push button is pushed. During APU fire test the control amplifier performs the following: • • • • • • • • APU FIRE red light on the Fire Protection Panel comes on CHECK FIRE DET red warning light on the Caution and Warning panel comes on and flashes Master WARNING PRESS TO RESET red light on the glare-shield comes on and flashes APU BTL ARM amber light on the Fire Protection Panel comes on APU FUEL OPEN green advisory light on the Fire Protection Panel goes off APU FUEL CLOSED white light on the Fire Protection Panel comes on EXTG white switch light on the Fire Protection Panel comes on APD FAULT amber light on the Fire Protection Panel comes on TO BE USED FOR MAINTENANCE TRAINING PURPOSES ONLY ATA 26 - FIRE PROTECTION Issue 6 -January 2023 Page 34 of 78 BOMBARDIER DHC 8-400 (PWC PW150) APU FUEL VALVE BTL EXTG AFT BTL FUEL OPEN CLOSED OPEN CLOSED ARM EXTG FIRE FIRE TEST BTL LOW FAULT HYD FAULT B ENGINE 1 PULL FUEL/HYD OFF AFT FWD BTL HYD CLOSED FAULT A FAULT B ENGINE 2 TEST DETECTION SMOKE VENT VALVE INLT OTLT OPEN CLOSED BTL LOW FWD BTL FAULT A EXTG AFT BTL FUEL PULL FUEL/HYD OFF EXTG 1 TEST 2 FIRE BOTTLE AFT ARM LOW AFT FWD ARM LOW FWD BAGGAGE FWD TEST SMOKE EXTG FIRE PROTECTION - FIRE PROTECTION PANEL DETAIL TO BE USED FOR MAINTENANCE TRAINING PURPOSES ONLY ATA 26 - FIRE PROTECTION Issue 6 -January 2023 Page 35 of 78 BOMBARDIER DHC 8-400 (PWC PW150) FIRE PROTECTION NACELLE FIRE EXTINGUISHING PURPOSE The Nacelle Fire Extinguishing uses two fire-extinguishing bottles for the nacelles fire extinguishing. GENERAL DESCRIPTION Two dual port fire extinguishing bottles are installed FWD and AFT in the left wing root, for engine fire or overheat suppression. Both bottles can be used to extinguish a fire in either engine. Indications in the flight compartment show the flight crew when the bottle pressure is low. Each bottle is connected through a Check Tee piece with a drain. This gives extinguisher coverage to the right or left primary, leading edge and landing gear zones. Electrical connections are installed for both explosive squibs and the bottle monitor pressure switch. TO BE USED FOR MAINTENANCE TRAINING PURPOSES ONLY ATA 26 - FIRE PROTECTION Issue 6 -January 2023 Page 36 of 78 BOMBARDIER DHC 8-400 (PWC PW150) FIRE PROTECTION - NACELLE EXTINGUISHER DISCHARGE TO BE USED FOR MAINTENANCE TRAINING PURPOSES ONLY ATA 26 - FIRE PROTECTION Issue 6 -January 2023 Page 37 of 78 BOMBARDIER DHC 8-400 (PWC PW150) FIRE PROTECTION NACELLE FIRE EXTINGUISHING SUB-SUB-SYSTEM DESCRIPTION A fire or overheat condition in the left or right nacelle will cause these flight deck indications: • • • • • PULL FUEL/HYD OFF handle light for related engine CHECK FIRE DET warning light on the Caution and Warning panel MASTER WARNING light on the glare-shield ENGINE FIRE lights on the left and right side of the glare-shield Audible warning bell The PULL FUEL/HYD OFF handle is pulled to close the fuel and hydraulic shutoff valves and arm the FWD and AFT bottles. Two BTL ARM lights on the FPP will come on showing that both bottles have continuity on the squib and that the AFT bottle and FWD bottle pressure switches have continuity. To discharge a bottle, the EXTG switch is set to AFT BTL or FWD BTL position. The selected bottle will discharge its extinguishant into the nacelle area. The bottle pressure switch will open and the BTL LOW light will come on to show loss of bottle pressure. The BTL ARM lights go off. TO BE USED FOR MAINTENANCE TRAINING PURPOSES ONLY ATA 26 - FIRE PROTECTION Issue 6 -January 2023 Page 38 of 78 BOMBARDIER DHC 8-400 (PWC PW150) FIRE PROTECTION - FIRE PROTECTION PANEL NACELLE FIRE DETAIL TO BE USED FOR MAINTENANCE TRAINING PURPOSES ONLY ATA 26 - FIRE PROTECTION Issue 6 -January 2023 Page 39 of 78 BOMBARDIER DHC 8-400 (PWC PW150) FIRE PROTECTION The PULL FUEL/HYD OFF handle test will show which bottle needs service, the arming light for that bottle will not come on. NACELLE FIRE EXTINGUISHING NOTE: FIRE EXTINGUISHER BOTTLES An allen key is used to test the contacts of pressure switch on the fire bottles. PURPOSE The Fire Extinguisher Bottles contain the suppressant necessary to combat nacelle fire or overheat. The extinguisher bottles use dual bridge-wire Electro Explosive Devices (EED) within each cartridge and redundant power lines with separate circuit breakers for reliability. Bridge-wire A of all cartridges is taken from one circuit breaker and routed along the left side of the aircraft to the cartridge. Bridge-wire B of all cartridges is taken from a separate breaker and routed along the right side of the aircraft to the respective cartridge. This arrangement meets the rotor burst requirements and gives redundant firing signals for each cartridge. The left and right extinguisher bottles are discharged manually from the FPP into the Primary Engine Zone (PEZ), Main Wheel Well (MWW) and Leading Edge Zone (LEZ) zones. The left or right bottle squibs are armed by pulling the FPP PULL FUEL/ HYD OFF handle. After arming, the pilot can operate one of the extinguisher bottles with the EXTG switch on the FPP. An electrical signal is sent through the bridgewires, which ignites the EED. When the EED explodes it ruptures a burst disc and the pressurized bottle then discharges through the connector Check Tee. The bottle configuration can give two applications of fire suppressant into the zones, in the event that the first attempt was not effective. The extinguisher bottles are constantly monitored for pressure during the non-alarm state. A manual exercise key is supplied for ground check of proper pressure switch operation. The key will open the pressure switch contacts, to simulate a depressurized bottle. Extinguisher bottle pressure switch status is shown by the BTL LOW light on the FPP. This light will come on when either bottle has lost pressure. TO BE USED FOR MAINTENANCE TRAINING PURPOSES ONLY ATA 26 - FIRE PROTECTION Issue 6 -January 2023 Page 40 of 78 BOMBARDIER DHC 8-400 (PWC PW150) FIRE PROTECTION - NACELLE FIRE EXTINGUISHER TO BE USED FOR MAINTENANCE TRAINING PURPOSES ONLY ATA 26 - FIRE PROTECTION Issue 6 -January 2023 Page 41 of 78 BOMBARDIER DHC 8-400 (PWC PW150) FIRE PROTECTION BAGGAGE COMPARTMENT FIRE EXTINGUISHING PURPOSE The baggage compartment fire extinguishing system, suppresses fire and overheat conditions in the forward (FWD) and AFT baggage compartments. GENERAL DESCRIPTION Fire extinguishing for the baggage compartments is performed by two High Rate Discharge (HRD) fire extinguisher bottles and one Low Rate Discharge (LRD) fire extinguisher bottle. Each baggage compartment has one HRD fire extinguisher, the LRD fire extinguisher is shared between the FWD and AFT baggage compartments. Each HRD fire extinguisher bottle has one High Rate fire extinguisher cartridge. The LRD fire extinguisher bottle has two Low Rate fire extinguisher cartridges. Each cartridge (HR and LR) contains an Electro-Explosive Device (EED) and discharges the contents of the bottles through the applicable fire extinguisher distribution tubes. The baggage compartment fire extinguishing system has the components that follow: • • • • • AFT High Rate Fire Extinguisher Bottle FWD High Rate Fire Extinguisher Bottle High Rate Fire Extinguisher Cartridges Low Rate Fire Extinguisher Bottle Low Rate Fire Extinguisher Cartridges TO BE USED FOR MAINTENANCE TRAINING PURPOSES ONLY ATA 26 - FIRE PROTECTION Issue 6 -January 2023 Page 42 of 78 BOMBARDIER DHC 8-400 (PWC PW150) FIRE PROTECTION - FIRE AND SMOKE DETECTION BLOCK DIAGRAM TO BE USED FOR MAINTENANCE TRAINING PURPOSES ONLY ATA 26 - FIRE PROTECTION Issue 6 -January 2023 Page 43 of 78 BOMBARDIER DHC 8-400 (PWC PW150) FIRE PROTECTION BAGGAGE COMPARTMENT FIRE EXTINGUISHING SUB-SUB-SYSTEM DESCRIPTION Indications on the Fire Protection Panel (FPP) are used to monitor the fire and the overheat conditions in the FWD and AFT baggage compartments. Extinguisher bottle pressure is also monitored from the FPP. Pilot action, pressing the applicable SMOKE EXTG switch-light is required to activate the High Rate fire extinguishers. If a fire condition is sensed in the aft baggage compartment, the aft high rate fire bottle will discharge first followed by the low rate fire extinguisher bottle which discharges automatically after seven minutes. The seven minute delay is to make sure that any remaining fire will be extinguished. If a fire condition is sensed in the FWD baggage compartment, both the high rate and low rate extinguishers will discharge at the same time. The extinguishing event indications of an aft baggage fire are as follows: • • • AFT ARM segment blank on the Fire Protection Panel - HRD EED is fired AFT LOW segment amber on the Fire Protection Panel - HRD fire bottle is empty low pressure FWD LOW segment amber on the Fire Protection Panel - LRD fire bottle is empty low pressure turns on 22 min after pushing EXTG switch TO BE USED FOR MAINTENANCE TRAINING PURPOSES ONLY ATA 26 - FIRE PROTECTION Issue 6 -January 2023 Page 44 of 78 BOMBARDIER DHC 8-400 (PWC PW150) FIRE PROTECTION - FIRE PROTECTION PANEL FOR AFT BAGGAGE COMPARTMENT FIRE TO BE USED FOR MAINTENANCE TRAINING PURPOSES ONLY ATA 26 - FIRE PROTECTION Issue 6 -January 2023 Page 45 of 78 BOMBARDIER DHC 8-400 (PWC PW150) FIRE PROTECTION BAGGAGE COMPARTMENT FIRE EXTINGUISHING SUB-SUB-SYSTEM DESCRIPTION The extinguishing event indications of an forward baggage fire are as follows: • • • FIRE BOTTLE FWD ARM segment off on the Fire Protection Panel - HRD EED is fired FIRE BOTTLE FWD LOW segment on - amber on the Fire Protection Panel - HRD fire bottle is empty low pressure FIRE BOTTLE AFT LOW segment on - amber on the Fire Protection Panel - LRD fire bottle is empty low pressure turns on 15 min after pushing EXTG switch TO BE USED FOR MAINTENANCE TRAINING PURPOSES ONLY ATA 26 - FIRE PROTECTION Issue 6 -January 2023 Page 46 of 78 BOMBARDIER DHC 8-400 (PWC PW150) FIRE PROTECTION - FIRE PROTECTION PANEL FOR FWD BAGGAGE COMPARTMENT FIRE TO BE USED FOR MAINTENANCE TRAINING PURPOSES ONLY ATA 26 - FIRE PROTECTION Issue 6 -January 2023 Page 47 of 78 BOMBARDIER DHC 8-400 (PWC PW150) FIRE PROTECTION This device lets the bottle discharge the extinguishing agent into the baggage compartment at a concentration of 3% for 45 minutes. If a smoke condition is sensed in the FWD baggage compartment, both the High-Rate and the Low-Rate fire extinguishers will discharge at the same time. AFT HIGH RATE FIRE EXTINGUISHER BOTTLE PURPOSE The Aft High Rate Fire Extinguisher Bottle contains the suppressant necessary for first line fire protection. The AFT high rate fire bottle is a stainless steel container filled with 11 lbs/4.99 kgs of liquid fire extinguishing agent Halon 1301 and pressurized with Nitrogen gas at 360 psig/2482 kPag. The bottle is installed in the aft equipment bay. One high rate fire extinguisher cartridge is located on the bottom of the AFT high rate fire bottle. If a smoke condition is sensed in the AFT baggage compartment, the AFT inlet and outlet vent valves will close automatically and give an indication on the FPP. The HRD extinguisher fires with the push of the AFT EXTG switch. After a seven minute delay, the low rate fire extinguisher will automatically discharge to make sure the fire is out. LOW RATE FIRE EXTINGUISHER BOTTLE PURPOSE The Low Rate Fire Extinguisher Bottle contains the suppressant necessary for slow release. This aircraft gives the time to divert to an alternate landing site. The low rate fire extinguisher is a stainless steel container filled with 17.5 lbs/ 7.94 kgs of liquid fire extinguishing agent Halon 1301 and pressurized with Nitrogen gas at 360 psig/2482 kPag. The bottle is installed in the aft equipment bay but is shared between the FWD and AFT baggage compartments. When a smoke condition is sensed in the AFT baggage compartment and the aft High-Rate fire bottle is activated, the LowRate fire extinguisher will automatically discharge after 7 minutes. A metering device located inside the low rate fire extinguisher controls the slow release of the extinguishing agent from the bottle. TO BE USED FOR MAINTENANCE TRAINING PURPOSES ONLY ATA 26 - FIRE PROTECTION Issue 6 -January 2023 Page 48 of 78 BOMBARDIER DHC 8-400 (PWC PW150) FIRE PROTECTION - AFT HIGH AND LOW RATE DISCHARGE BOTTLES LOCATOR TO BE USED FOR MAINTENANCE TRAINING PURPOSES ONLY ATA 26 - FIRE PROTECTION Issue 6 -January 2023 Page 49 of 78 BOMBARDIER DHC 8-400 (PWC PW150) FIRE PROTECTION FWD HIGH RATE FIRE EXTINGUISHER BOTTLE PURPOSE The FWD High Rate Fire Extinguisher Bottle contains the suppressant necessary for first line fire protection. There is one High Rate fire extinguisher bottle located on the forward baggage compartment aft wall. The High Rate extinguisher for the FWD baggage compartment is a stainless steel container filled with 4.33 lbs (1.96 kgs) of liquid fire extinguishing agent Halon 1301 and pressurized with Nitrogen gas at 360 psig (2482 kPag). If a smoke condition is sensed in the FWD baggage compartment an indication is given on the FPP. Pilot action is required to manually activate the high rate fire extinguisher and the low rate fire extinguisher will discharge simultaneously with it. TO BE USED FOR MAINTENANCE TRAINING PURPOSES ONLY ATA 26 - FIRE PROTECTION Issue 6 -January 2023 Page 50 of 78 BOMBARDIER DHC 8-400 (PWC PW150) FIRE PROTECTION - FORWARD HIGH RATE DISCHARGE BOTTLE LOCATOR TO BE USED FOR MAINTENANCE TRAINING PURPOSES ONLY ATA 26 - FIRE PROTECTION Issue 6 -January 2023 Page 51 of 78 BOMBARDIER DHC 8-400 (PWC PW150) FIRE PROTECTION There are two low rate fire extinguisher cartridges. Each fire extinguisher cartridge is attached to its related discharge head, located on the bottom of the LRD fire extinguishing bottle. Each cartridge contains a dual bridge-wire EED and redundant power lines with separate circuit breakers for mission reliability. HIGH RATE FIRE EXTINGUISHER CARTRIDGES PURPOSE High Rate Fire Extinguisher Cartridges cause the extinguisher bottle to discharge its contents through the distribution tubing leading to the FWD or AFT baggage compartment. There is one High Rate fire extinguisher cartridge for each High Rate fire extinguisher. Each fire extinguisher cartridge is attached to its related discharge head, located on the bottom of the fire extinguishing bottle. In each cartridge, bridge-wire A is taken from one circuit breaker and routed down the left side of the aircraft to the cartridge. Bridge-wire B is taken from a separate circuit breaker and routed down the right side of the aircraft to the cartridge. Loss of either power breaker will not cause loss of fire extinguisher capability. Each cartridge has a related electrical connector. When an electrical signal is sent through the bridge-wires, the EED ignites and explodes rupturing a burst disk. This causes the extinguisher bottle to discharge its contents through the distribution tubing leading to the AFT or FWD baggage compartment. Each cartridge contains a dual bridge-wire EED and redundant power lines with separate circuit breakers for mission reliability. In each cartridge, bridge-wire A is taken from one circuit breaker and routed down the left side of the aircraft to the cartridge. Bridge-wire B is taken from a separate circuit breaker and routed down the right side of the aircraft to the cartridge. Loss of electrical power to one bridge-wire will not cause loss of extinguisher fire capability. Each cartridge has an electrical connector. When an electrical signal is sent through the bridge-wires the EED ignites and explodes rupturing a burst disk. This causes the extinguisher bottle to discharge its contents through the distribution tubing leading to the FWD or AFT baggage compartment. LOW-RATE FIRE EXTINGUISHER CARTRIDGES PURPOSE Low-Rate Fire Extinguisher Cartridges cause the extinguisher bottle to discharge its contents through the distribution tubing leading to the AFT or FWD baggage compartment. TO BE USED FOR MAINTENANCE TRAINING PURPOSES ONLY ATA 26 - FIRE PROTECTION Issue 6 -January 2023 Page 52 of 78 BOMBARDIER DHC 8-400 (PWC PW150) INTENTIONALLY LEFT BLANK TO BE USED FOR MAINTENANCE TRAINING PURPOSES ONLY ATA 26 - FIRE PROTECTION Issue 6 -January 2023 Page 53 of 78 BOMBARDIER DHC 8-400 (PWC PW150) FIRE PROTECTION fire or overheat condition is still sensed, a manual override capability is available by operating the APU EXTG switch located on the FPP. APU FIRE EXTINGUISHING APU fire extinguisher bottle pressure is shown by a BTL LOW light on the FPP. A failure of the APD integrity switch will cause the APU FAULT light to come on. The APU will automatically shut down. PURPOSE The Auxiliary Power Unit (APU) Fire Extinguishing System suppresses fire and overheat conditions in the APU. GENERAL DESCRIPTION One fire extinguishing bottle is used to suppress fire and overheat conditions in the APU compartment. The APU fire extinguishing bottle has one fire extinguisher cartridge. The APU fire extinguishing system has the components that follow: • • APU Fire Extinguisher Bottle APU Fire Extinguisher Cartridge SUB-SUB-SYSTEM DESCRIPTION Indications on the Fire Protection Panel (FPP) are used to monitor APU fire or overheat conditions. No pilot action is required to operate APU fire protection. The control amplifier controls a relay which closes the APU fuel valve. When electrical power from the relay is supplied to the Full-Authority Digital- Electronic-Control (FADEC) the APU FUEL VALVE CLOSED advisory light on the FPP comes on. The APU is shutdown automatically and the FAIL advisory light on the APU control panel comes on. After a 7 second delay, an electrical signal from the control amplifier ignites an ElectroExplosive Device (EED) in the extinguisher cartridge. The EED then explodes and the fire extinguishing agent is automatically released through the distribution tubes to the APU compartment. The FPP APU BTL ARM light goes out and the BTL LOW light comes on. If automatic fire extinguishing fails and a TO BE USED FOR MAINTENANCE TRAINING PURPOSES ONLY ATA 26 - FIRE PROTECTION Issue 6 -January 2023 Page 54 of 78 BOMBARDIER DHC 8-400 (PWC PW150) FIRE PROTECTION - FIRE PROTECTION PANEL FOR APU FIRE TO BE USED FOR MAINTENANCE TRAINING PURPOSES ONLY ATA 26 - FIRE PROTECTION Issue 6 -January 2023 Page 55 of 78 BOMBARDIER DHC 8-400 (PWC PW150) FIRE PROTECTION The fire extinguisher cartridge must be handled with extreme care. APU FIRE EXTINGUISHER BOTTLES PURPOSE The APU Fire Extinguisher Bottles contain the suppressant necessary to combat a fire or overheat in the APU compartment. There is one APU fire extinguishing bottle for the APU compartment. The fire extinguisher is a stainless steel container filled with 4.37 lbs/1.98 kgs of liquid fire extinguishing agent Halon 1301 and pressurized with Nitrogen gas at 600 psig/4136 kPag. The APU fire extinguisher bottle is located forward of the APU compartment in the aft equipment bay. APU FIRE EXTINGUISHER CARTRIDGES PURPOSE APU Fire Extinguisher Cartridges cause the extinguisher bottle to discharge its contents through the distribution tubing leading to the APU compartment. There is one APU fire extinguisher cartridge attached to the discharge head, located on the bottom of the fire extinguishing bottle. The cartridge contains a dual bridge-wire EED and redundant power lines with separate circuit breakers for reliability. Bridgewire A is taken from one circuit breaker and routed along the left side of the aircraft to the cartridge. Bridge-wire B is taken from a separate circuit breaker and routed along the right side of the aircraft to the cartridge. Malfunction of either power circuit breaker will not cause loss of extinguisher fire capability. Each cartridge has an electrical connector. When an electrical signal is sent through the bridge-wires the EED ignites and explodes rupturing a burst disk. This causes the extinguisher bottle to discharge its contents through the distribution tubing leading to the APU compartment. TO BE USED FOR MAINTENANCE TRAINING PURPOSES ONLY ATA 26 - FIRE PROTECTION Issue 6 -January 2023 Page 56 of 78 BOMBARDIER DHC 8-400 (PWC PW150) FIRE PROTECTION - APU FIRE EXTINGUISHING LOCATOR TO BE USED FOR MAINTENANCE TRAINING PURPOSES ONLY ATA 26 - FIRE PROTECTION Issue 6 -January 2023 Page 57 of 78 BOMBARDIER DHC 8-400 (PWC PW150) FIRE PROTECTION APU FIRE EXTINGUISHER BOTTLES DISCHARGE NOZZLES The APU fire extinguisher bottle is located outside of the APU compartment and is connected to distribution tubing leading inside the compartment. TO BE USED FOR MAINTENANCE TRAINING PURPOSES ONLY ATA 26 - FIRE PROTECTION Issue 6 -January 2023 Page 58 of 78 BOMBARDIER DHC 8-400 (PWC PW150) FIRE PROTECTION - APU FIRE EXTINGUISHING LOCATOR TO BE USED FOR MAINTENANCE TRAINING PURPOSES ONLY ATA 26 - FIRE PROTECTION Issue 6 -January 2023 Page 59 of 78 BOMBARDIER DHC 8-400 (PWC PW150) FIRE PROTECTION The bottle for the agent is a stainless sphere with an internal volume of 9 cubic inches/0.15 L. The bottle is charged with 0.23 lbs/0.104 kgs of agent to a pressure of 27 psi /86 kPa. LAVATORY FIRE EXTINGUISHING The lavatory fire extinguisher has dual discharge outlets. If the end caps on the discharge tubes reach 174°F/79°C, the fusible alloy seals melt and release the end cap from the tubes. The extinguishing agent is then released into the waste bin. PURPOSE The lavatory fire extinguisher is used to extinguish a possible fire in the lavatory waste bin. GENERAL DESCRIPTION The lavatory fire extinguisher is located in the upper amenity assembly, just above the waste bin. It is attached to the bulkhead with two screws with the end caps protrude through the cabinet into the waste bin. The lavatory compartment waste bin is protected by a single thermally activated fire extinguisher with no electrical interface. If a fire occurs in the lavatory compartment waste bin, the extinguishing agent is discharged into the bin. SUB-SUB-SYSTEM DESCRIPTION The lavatory fire extinguisher has dual discharge outlets that are thermally actuated with no electrical interface. When a fire occurs in the lavatory compartment waste bin, the temperature of the end caps on the container, increases. When the temperature reaches a set point, it causes the fusible seals to melt and release the end caps from the discharge tubes. The extinguishing agent is then released and discharged into the bin. The lavatory fire extinguisher cannot be refilled or reused. It requires periodic weighing of the fire extinguisher bottle to make sure that it is full. If the discharge tubes are bent beyond the specified angle, fire suppression may not work properly. LAVATORY FIRE EXTINGUISHER PURPOSE The Lavatory Fire Extinguisher is used to combat a fire in the automatically combat a fire in the lavatory waste bin. The lavatory fire extinguisher uses bromotrifluoromethane as the extinguishing agent. TO BE USED FOR MAINTENANCE TRAINING PURPOSES ONLY ATA 26 - FIRE PROTECTION Issue 6 -January 2023 Page 60 of 78 BOMBARDIER DHC 8-400 (PWC PW150) FIRE PROTECTION - LAVATORY COMPARTMENT WASTE BIN FIRE EXTINGUISHER LOCATOR TO BE USED FOR MAINTENANCE TRAINING PURPOSES ONLY ATA 26 - FIRE PROTECTION Issue 6 -January 2023 Page 61 of 78 BOMBARDIER DHC 8-400 (PWC PW150) FIRE PROTECTION - FIRE PROTECTION SCHEMATIC SHEET 1 TO BE USED FOR MAINTENANCE TRAINING PURPOSES ONLY ATA 26 - FIRE PROTECTION Issue 6 -January 2023 Page 62 of 78 BOMBARDIER DHC 8-400 (PWC PW150) FIRE PROTECTION - FIRE PROTECTION SCHEMATIC SHEET 2 TO BE USED FOR MAINTENANCE TRAINING PURPOSES ONLY ATA 26 - FIRE PROTECTION Issue 6 -January 2023 Page 63 of 78 BOMBARDIER DHC 8-400 (PWC PW150) FIRE PROTECTION - FIRE PROTECTION SCHEMATIC SHEET 3 TO BE USED FOR MAINTENANCE TRAINING PURPOSES ONLY ATA 26 - FIRE PROTECTION Issue 6 -January 2023 Page 64 of 78 BOMBARDIER DHC 8-400 (PWC PW150) FIRE PROTECTION - SMOKE DETECTION CARGO TO BE USED FOR MAINTENANCE TRAINING PURPOSES ONLY ATA 26 - FIRE PROTECTION Issue 6 -January 2023 Page 65 of 78 BOMBARDIER DHC 8-400 (PWC PW150) FIRE PROTECTION - FIRE EXTINGUISHING POWER SUPPLY TO BE USED FOR MAINTENANCE TRAINING PURPOSES ONLY ATA 26 - FIRE PROTECTION Issue 6 -January 2023 Page 66 of 78 BOMBARDIER DHC 8-400 (PWC PW150) FIRE PROTECTION - FIRE DETECTION NO. 2 ENGINE TO BE USED FOR MAINTENANCE TRAINING PURPOSES ONLY ATA 26 - FIRE PROTECTION Issue 6 -January 2023 Page 67 of 78 BOMBARDIER DHC 8-400 (PWC PW150) FIRE PROTECTION - FIRE DETECTION NO. 1 ENGINE TO BE USED FOR MAINTENANCE TRAINING PURPOSES ONLY ATA 26 - FIRE PROTECTION Issue 6 -January 2023 Page 68 of 78 BOMBARDIER DHC 8-400 (PWC PW150) FIRE PROTECTION - CARGO FIRE PROTECTION TO BE USED FOR MAINTENANCE TRAINING PURPOSES ONLY ATA 26 - FIRE PROTECTION Issue 6 -January 2023 Page 69 of 78 BOMBARDIER DHC 8-400 (PWC PW150) FIRE PROTECTION - FIRE EXTINGUISHING PANEL TO BE USED FOR MAINTENANCE TRAINING PURPOSES ONLY ATA 26 - FIRE PROTECTION Issue 6 -January 2023 Page 70 of 78 BOMBARDIER DHC 8-400 (PWC PW150) INTENTIONALLY LEFT BLANK TO BE USED FOR MAINTENANCE TRAINING PURPOSES ONLY ATA 26 - FIRE PROTECTION Issue 6 -January 2023 Page 71 of 78 BOMBARDIER DHC 8-400 (PWC PW150) FIRE PROTECTION PORTABLE HAND-OPERATED FIRE EXTINGUISHERS PURPOSE The flight and passenger compartments are protected by four portable hand operated fire extinguishers. GENERAL DESCRIPTION The portable hand-operated fire extinguishers complete with a quick release brackets are attached at three locations in the aircraft. Four fire extinguishers are provided at the locations that follow: • • • Flight compartment Forward passenger compartment Aft passenger compartment (2) A single portable hand-operated fire extinguisher in the flight compartment is attached to the left bulkhead behind the pilot’s seat. Instructions for use of the extinguisher are shown on the body of the extinguisher bottle. NOTE: The location of the bottles may vary due to the different interior arrangements. TO BE USED FOR MAINTENANCE TRAINING PURPOSES ONLY ATA 26 - FIRE PROTECTION Issue 6 -January 2023 Page 72 of 78 BOMBARDIER DHC 8-400 (PWC PW150) FIRE PROTECTION - HAND OPERATED FIRE EXTINGUISHER LOCATOR TO BE USED FOR MAINTENANCE TRAINING PURPOSES ONLY ATA 26 - FIRE PROTECTION Issue 6 -January 2023 Page 73 of 78 BOMBARDIER DHC 8-400 (PWC PW150) FIRE PROTECTION PORTABLE HAND-OPERATED FIRE EXTINGUISHERS SUB-SUB-SYSTEM DESCRIPTION A single portable hand-operated fire extinguisher is located in the forward draft bulkhead stowage. Instructions for use of the extinguisher are shown on the body of the extinguisher bottle. TO BE USED FOR MAINTENANCE TRAINING PURPOSES ONLY ATA 26 - FIRE PROTECTION Issue 6 -January 2023 Page 74 of 78 BOMBARDIER DHC 8-400 (PWC PW150) FIRE PROTECTION - FORWARD FIRE EXTINGUISHER LOCATOR TO BE USED FOR MAINTENANCE TRAINING PURPOSES ONLY ATA 26 - FIRE PROTECTION Issue 6 -January 2023 Page 75 of 78 BOMBARDIER DHC 8-400 (PWC PW150) FIRE PROTECTION PORTABLE HAND-OPERATED FIRE EXTINGUISHERS SUB-SUB-SYSTEM DESCRIPTION Two portable hand-operated fire extinguishers in the aft passenger compartment are attached to the aft draft bulkhead. The two extinguishers are located in a drawer attached to the left aft draft bulkhead forward side. Instructions for use of the extinguisher are shown on the body of the extinguisher bottle. HAND OPERATED FIRE EXTINGUISHER The Hand Operated Fire Extinguisher is used to manually combat fires in the passenger and flight compartment. The portable hand-operated fire extinguishers are filled with 3.5 lbs/1.6 kgs of Halon 1211 (bromochlorodifluoromethane) universal extinguishing agent. Each bottle is suitable for use on electrical, fuel or oil fires. Halon 1211 is not toxic or corrosive. It does not cause cold burns, harm fabrics or metals and does not leave residue on electrical components. TO BE USED FOR MAINTENANCE TRAINING PURPOSES ONLY ATA 26 - FIRE PROTECTION Issue 6 -January 2023 Page 76 of 78 BOMBARDIER DHC 8-400 (PWC PW150) FIRE PROTECTION - HAND OPERATED FIRE EXTINGUISHER AFT CABIN TO BE USED FOR MAINTENANCE TRAINING PURPOSES ONLY ATA 26 - FIRE PROTECTION Issue 6 -January 2023 Page 77 of 78 BOMBARDIER DHC 8-400 (PWC PW150) INTENTIONALLY LEFT BLANK TO BE USED FOR MAINTENANCE TRAINING PURPOSES ONLY ATA 26 - FIRE PROTECTION Issue 6 -January 2023 Page 78 of 78