Boeing B747-400 ATA 33 Lights PDF

Boeing B747-400 Differences_to_ Revision: 1SEP2009 Author: PrA ATA 33 For Training Purposes Only E LTT 2007 Lights Line and Base Maintenance Level 3 -B744_33_L3 Training Manual...

Boeing B747-400 Differences_to_ Revision: 1SEP2009 Author: PrA ATA 33 For Training Purposes Only E LTT 2007 Lights Line and Base Maintenance Level 3 -B744_33_L3 Training Manual For training purposes and internal use only. E Copyright by Lufthansa Technical Training (LTT). LTT is the owner of all rights to training documents and training software. Any use outside the training measures, especially reproduction and/or copying of training documents and software − also extracts there of − in any format at all (photocopying, using electronic systems or with the aid of other methods) is prohibited. Passing on training material and training software to third parties for the purpose of reproduction and/or copying is prohibited without the express written consent of LTT. Copyright endorsements, trademarks or brands may not be removed. A tape or video recording of training courses or similar services is only permissible with the written consent of LTT. In other respects, legal requirements, especially under copyright and criminal law, apply. Lufthansa Technical Training Dept HAM US Lufthansa Base Hamburg Weg beim Jäger 193 22335 Hamburg Germany Tel: +49 (0)40 5070 2520 Fax: +49 (0)40 5070 4746 E-Mail: [email protected] www.Lufthansa-Technical-Training.com Revision Identification: S The date given in the column ”Revision” on the face of S Dates and author’s ID, which may be given at the base S The LTT production process ensures that the Training this cover is binding for the complete Training Manual. of the individual pages, are for information about the Manual contains a complete set of all necessary pages latest revision of that page(s) only. in the latest finalized revision. Lufthansa Technical Training LIGHTS B747−400 GENERAL 33−00 ATA 33 LIGHTS FOR TRAINING PURPOSES ONLY! FRA US/T-3 PrA Apr 14, 2009 ATA DOC Page 1 Lufthansa Technical Training LIGHTS B747−400 GENERAL 33−00 33−00 GENERAL INTRODUCTION White incandescent and fluorescent lamps are used on all airplane light assemblies. Selected requirements for colored illumination as used on instrument panel indicators, fuselage anti−collision, and wingtip navigation lights is achieved through the use of colored lenses. CAUTION: CHECK IDENTIFICATION NUMBER BEFORE INSTALLING LAMP. INSTALLATION OF LAMPS WITH INCORRECT VOLTAGE RATING FOR APPLICATION MAY CAUSE CIRCUITRY DAMAGE. NOTE: All lamps can be found in the Lamp Usage Chart. Refer to Standard Schematic Manual (SSM) 33−00−01. Flight Compartment Lighting (33−10) Flight compartment lighting illuminates the control cabin work areas and control panels. A master dim and test system for testing annunciators is provided. Passenger Compartment Lighting (33−20) Passenger compartment lights give lighting to each seat, aisle, entry, lavatory, galley, and crew rest. Each call light and information sign gives messages to the flight crew and the passengers. Cargo and Service Compartment Lighting (33−30) Cargo and service compartment lights illuminate maintenance and cargo loading areas during ground operations. Exterior Lighting (33−40) FOR TRAINING PURPOSES ONLY! Exterior lights illuminate the airplane and landing area during flight operations. They illuminate the runway and taxi areas during ground operations. Emergency Lighting (33−50) Each interior and exterior emergency light gives lighting to the escape paths. There are lights for the aisles and exits and their associated areas. FRA US/T-3 PrA Apr 14, 2009 01|INTRO|L1 Page 2 Lufthansa Technical Training LIGHTS B747−400 GENERAL 33−00 LIGHTS FLIGHT PASSENGER CARGO AND EXTERIOR EMERGENCY DECK COMPARTMENT SERVICE LIGHTS LIGHTS LIGHTS LIGHTS LIGHTS FOR TRAINING PURPOSES ONLY! Figure 1 Light System Overview FRA US/T-3 PrA Apr 14, 2009 01|INTRO|L1 Page 3 Lufthansa Technical Training LIGHTS B747−400 FLIGHT COMPARTMENT LIGHTING 33−10 33−10 FLIGHT COMPARTMENT LIGHTING INTRODUCTION General Flight compartment lighting consists of instrument panel and compartment area illumination. Lighting control panels at each crewmembers station and overhead panel P5 provide lighting on/off switching and dimming control. Flight compartment lighting is divided into four sections: Instrument Panel Lights (33−11) The instruments, switch/lights and systems control panels contain integral incandescent lights. Glareshield and control stand panels are provided with external flood lighting for illumination. The lights illuminate dials, control panel lettering and switch position lettering. Master Dim and Test (33−12) A master dim and test system allows the pilot to test indicator lights in the flight compartment, or to select one of two predetermined indicator light intensity levels. Flight Compartment Illumination (33−13) Flight compartment illumination is provided by incandescent dome lights in the ceiling panels, flight deck access lights and panel flood lights. Flight Compartment Auxiliary Lights (33−15) Area lights such as map, chart, and flight kit/utility lights are provided. FOR TRAINING PURPOSES ONLY! FRA US/T-3 PrA Apr 14, 2009 02|FLT COMP|L1 Page 4 Lufthansa Technical Training LIGHTS B747−400 FLIGHT COMPARTMENT LIGHTING 33−10 DOME LIGHTS INSTRUMENT PANEL LIGHTS AUXILIARY LIGHTS MASTER DIM AND TEST FOR TRAINING PURPOSES ONLY! FLIGHT DECK Figure 2 Flight Deck Lighting FRA US/T-3 PrA Apr 14, 2009 02|FLT COMP|L1 Page 5 Lufthansa Technical Training LIGHTS B747−400 FLIGHT COMPARTMENT LIGHTING 33−10 PANEL LIGHT DIMMER UNITS-DESCRIPTION General Dimmer units provide variable ac power to the panel lightning circuits. Input power is 115 volts AC and output power is 0 to 5 volts AC, depending on the setting of the associated light control. Dimmer Units Several dimmer units are located in the P7 panel. The panel sections are hinged to open downward for access. Additional dimmer units are located on either interior side of the P9 aisle stand. The left or right CDU is removed for access to the dimmer units. Maintenance Practices Dimmer units have either one or two secondary protection circuit brakers. When replacing a faulty dimmer unit, the secondary protection circuit breakers must be removed from the defective unit and reinstalled on the replacement unit. Located under the terminal cover is a replaceable fuse CAUTION: DO NOT OPERATE THE DIMMER UNIT UNDER NO−LOAD CONDITION; THE TRANSFORMER MAY BURN OUT. FOR TRAINING PURPOSES ONLY! FRA US/T-3 PrA Apr 14, 2009 03|PNL DIM|L2 Page 6 Lufthansa Technical Training LIGHTS B747−400 FLIGHT COMPARTMENT LIGHTING 33−10 FASTENER DIMMER SREWS UNITS WIRE CONNECTION P7 DIMMER UNIT P3 P2 P9 P1 SECONDARY PROTECTION CDU-R CIRCUIT BREAKERS TERMINAL COVER PRIMARY FUSE (UNDER P8 TERMINAL COVER) FOR TRAINING PURPOSES ONLY! CDU-L DIMMER UNITS Figure 3 Panel Light Dimmer Units FRA US/T-3 PrA Apr 14, 2009 03|PNL DIM|L2 Page 7 Lufthansa Technical Training LIGHTS B747−400 FLIGHT COMPARTMENT LIGHTING 33−10 INDICATOR LIGHTS-DESCRIPTION General Indicator lights are provided in the flight deck to indicate system status. Each indicator light has two lamps powered by the master dim and test system. A diode/fuse card provides electrical isolation and fault protection. Relamping Both lamps should be installed in the indicator light at all times, even if a lamp has failed. The indicator lights are relamped from the front of the panel. Pull the lens cap assembly outward for access to the lamps. CAUTION: DO NOT PRY OR GRIP ANNUNCIATOR LENS CAP WITH A TOOL OR LENS MAY BE DAMAGED. REMOVE WITH FINGERS ONLY. Verify that the part number of the replacement lamp is correct for the application. Diode/Fuse Card Replacement Following relamping, test the indicator light by using the indicator lights dim and test switch. If both lamps in the indicator fail to light, replace the diode/fuse card. Indicator Light Replacement Removal of the indicator light requires removal of the individual wire contacts from the rear of the indicator light with the proper insertion/removal tool. The indicator light is secured to the panel by a mounting sleeve which is retained by two spring−loaded mounting lugs. The lug adjustment screws are accessible with the diode fuse card and drawer assembly removed. FOR TRAINING PURPOSES ONLY! FRA US/T-3 PrA Apr 14, 2009 04|IND|L2 Page 8 Lufthansa Technical Training LIGHTS B747−400 FLIGHT COMPARTMENT LIGHTING 33−10 DIODE/FUSE PANEL CARD ASSEMBLY BULB SYS SYS SYS SYS FAULT FAULT FAULT FAULT DRAWER ASSEMBLY LENS CAP ASSEMBLY PANEL WIRING INDICATOR LIGHT MOUNTING SLEEVE FOR TRAINING PURPOSES ONLY! BASE ASSEMBLY MOUNTING LUG MOUNTING SCREW TOOL DIODE/FUSE CARD REMOVAL Figure 4 Indicator Light FRA US/T-3 PrA Apr 14, 2009 04|IND|L2 Page 9  LIGHTS B747−400 Lufthansa Technical Training FLIGHT COMPARTMENT LIGHTING 33−10 SWITCH LIGHTS-DESCRIPTION General Switch lights provide control inputs to their associated systems. Lighted displays indicate switch position and/or system status. Two types of switches, momentary and alternate action are used. Both types have four internal switches for system control and both are internally lighted. Alternate Action Switches Alternate action switches are mechanically latched in the last operated position (in or out). Each succeeding operation selects the switch to the opposite position. Switch position is indicated by the absence or presence of a mechanical flag in the switch face. The switch position display (flag) has a white legend on a black background in the engaged (in) position and is illuminated, generally, by the 5 volt ac panel lighting circuit. The legend is hidden by a mechanical shutter in the relaxed (out) position and the 5 volt lighting turned off. Momentary Switches Pressing the momentary switch transfers the contacts. Releasing the switch transfers the contacts to the original position. The switch has no switch position display. The lighted display can indicate the position of a relay or contactor controlled by the switch or function as a status/caution indicator. Status/Caution Display The status/caution display portion of either type of switch is a light displaying system condition. The legend can be either a color or black on a black or white background. The lights utilize the master dim and test system power, 28 volts dc for bright and 12 volts dc for dim. FOR TRAINING PURPOSES ONLY! FRA US/T-3 PrA Apr 14, 2009 05|SW LIGHTS|L3 Page 10  LIGHTS B747−400 Lufthansa Technical Training FLIGHT COMPARTMENT LIGHTING 33−10 TO SYSTEM TO SYSTEM CONTROL CONTROL CIRCUITS CIRCUITS SWITCH POSITION DISPLAY STATUS/ CAUTION DISPLAY FOR TRAINING PURPOSES ONLY! STATUS/ CAUTION DISPLAY MOMENTARY TYPE ALTERNATE ACTION TYPE Figure 5 Switch Lights FRA US/T-3 PrA Apr 14, 2009 05|SW LIGHTS|L3 Page 11  LIGHTS B747−400 Lufthansa Technical Training FLIGHT COMPARTMENT LIGHTING 33−10 SWITCH LIGHT MAINTENANCE PRACTICES (KORRY) Relamping Removal/ Installation The switch lights are relamped from the front of the panel. The lens cap Removal of the entire switch assembly requires removing individual wire assembly is removed for access to the lamps, which are in the backside of the contacts from the rear of the switch with the proper insertion/removal tool. lens cap assembly. Switch lights are secured to the panel by a mounting sleeve which is retained by a detent and two spring−loaded mounting lugs. The mounting lugs are WARNING: BEFORE ACTUATING ANY SWITCH LIGHT FOR THE loosened with a screwdriver to disengage the mounting sleeve. PURPOSE OF TESTING ITS LIGHTING, RELAMPING OR OTHER MAINTENANCE OF THE SWITCH ITSELF, MAKE SURE THE ASSOCIATED SYSTEM IS DEACTIVATED BY OPENING APPROPRIATE SYSTEM CIRCUIT BREAKERS. FAILURE TO DO SO MAY CAUSE SERIOUS ACCIDENTS AND/OR DAMAGE EQUIPMENT. CAUTION: PULL APPROPRIATE LIGHTING SYSTEM CIRCUIT BREAKER TO PREVENT DAMAGE TO DIMMING CARDS WHEN LENS CAP IS REINSERTED. DO NOT PRY OR GRIP LENS CAP WITH A TOOL OR LENS CAP MAY BE DAMAGED. REMOVE WITH FINGERS ONLY. Alternate action switch lights must be in the unlatched (out) position in order to remove the lens cap. Pull on the cap until the lock disengages from the cap assembly catch. Rotate the cap 90 degrees upward or to the side to remove the lamps. CAUTION: CARE MUST BE TAKEN WHEN PULLING OFF THE CAP ASSENMBLY. THE LOCK OR THE CAM PLATE OF THE MASTER MODULE ASSEMBLY SOMETIMES BREAK. Master Module Replacement FOR TRAINING PURPOSES ONLY! The master module assembly contains system switches and the circuit module contains diodes and fuses for the status/caution display lighting. The master module assembly and circuit module may be removed from the front of the housing without removing the housing from the panel. Removal of the cap assembly allows access to mounting lug screws. Turning the mounting lug screws counterclockwise will stow the lugs inside housing assembly, allowing the removal of the master module assembly. FRA US/T-3 PrA Apr 14, 2009 05|SW LIGHTS|L3 Page 12  LIGHTS B747−400 Lufthansa Technical Training FLIGHT COMPARTMENT LIGHTING 33−10 BAIL WIRE BAIL WIRE ELECTRICAL CUP CONTACT CIRCUIT MODULE BULB LOCK CAP ASSEMBLY MOUNTING LUGS MOUNTING LUG SCREW CAP ASSY CATCH (FRONT VIEW) MASTER MODULE WIRE ASSEMBLY FOLLOWER MOUNTING HOUSING SLEEVE CAM ASSEMBLY FOR TRAINING PURPOSES ONLY! TRACK CAM DETENT PLATE HOLES DETENT BOTTOM VIEW Figure 6 Switch Light Maintenance Practices FRA US/T-3 PrA Apr 14, 2009 05|SW LIGHTS|L3 Page 13 Lufthansa Technical Training LIGHTS B747−400 FLIGHT COMPARTMENT LIGHTING 33−10 INTEGRAL PANEL LIGHTS General Illumination of panel lettering and panel schematics is provided by lightplates. The lightplate is an acrylic plastic panel overlay, lighted internally by small incandescent bulbs. Integral Panel Lights The lightplate assembly consists of small incandescent bulbs soldered to a printed circuit board which is joined to a plastic faceplate. The faceplate is non-transparent except for the illuminated lettering and panel schematics. The lightplate assembly is attached to the panel by mounting screws. An electrical connector soldered to the back of the printed circuit board mates with a panel−mounted receptacle. The location of the electrical connector is identified by a small cross on the front of the faceplate. Lightplates are designed such that the failure of several bulbs should not impair panel lighting. If panel lighting is compromised by the failure of several bulbs, the lightplate assembly is replaced. FOR TRAINING PURPOSES ONLY! FRA US/T-3 PrA Apr 14, 2009 06|LIGHTPLT|L2 Page 14 Lufthansa Technical Training LIGHTS B747−400 FLIGHT COMPARTMENT LIGHTING 33−10 ELECTRICAL CONNECTOR LOCATIION ILLUMINATED AREAS (LETTERING AND SCHEMATIC FACEPLATE MOUNTING SCREW ELECTRICAL CONNECTOR FRONT CIRCUIT BOARD FOR TRAINING PURPOSES ONLY! BACK Figure 7 Lightplate Assembly FRA US/T-3 PrA Apr 14, 2009 06|LIGHTPLT|L2 Page 15 Lufthansa Technical Training LIGHTS B747−400 FLIGHT COMPARTMENT LIGHTING 33−10 MASTER DIM AND TEST SYSTEM General The master dim and test system controls the light levels of indicator lights (including the status/caution portion of switch lights) and the aisle stand digital displays. Master Dim and Test Module Control components are contained in M886, master dim and test control module, located behind the flight deck coat closet. Master Dim and Test Switch A three−position (bright and dim, test) switch is located on the right lighting control module, P5. BRT/DIM The bright and dim positions allow selection light intensity level. TEST Placing the switch in the momentary test position turns on all the indicator lights. Holding the switch in test position for 10 seconds causes the indicator lights to dim. NOTE: Power for illumination of the engine and APU fire handles and engine fuel control switches is supplied by the master dim and test system. However, placing the indicator lights dim and test switch to the TEST position will not turn those lights on. Placing the switch to DIM will reduce the intensity of the fuel control switch lights but not the fire handle lights. FOR TRAINING PURPOSES ONLY! FRA US/T-3 PrA Apr 14, 2009 07|MD&T|L2 Page 16 Lufthansa Technical Training LIGHTS B747−400 FLIGHT COMPARTMENT LIGHTING 33−10 IND LTS TEST PILOTS INDICATOR OVERHEAD BRT LIGHT DIM PANEL DIM AND TEST SWITCH INDICATOR LIGHT DIM AND TEST SWITCH DIMMER ELECTRICAL CARDS (7) CONNECTORS GREEN LED DIM AND TEST RELAYS FOR TRAINING PURPOSES ONLY! DOOR P6 PANEL FLIGHT DECK MOUNTING TIME BOLT DELAY RELAY MASTER DIM AND TEST MODULE Figure 8 Master Dim and Test FRA US/T-3 PrA Apr 14, 2009 07|MD&T|L2 Page 17 Lufthansa Technical Training LIGHTS B747−400 FLIGHT COMPARTMENT LIGHTING 33−10 FLIGHT DECK ACCESS LIGHTS General Flight compartment illumination is provided by flight compartment access lights and dome lights. Access lights provide entryway illumination from outside the airplane to the flight deck. Flight Deck Access Lights The flight compartment access path from the No. 2 main entry door and the main equipment center external access door is illuminated by lamps in the lower lobe, main deck and upper deck. A switch at each entry and in flight compartment provides illumination control. Access paths to the flight compartment from either the No.1 main entry door or the main E/E equipment center external access door are illuminated. Lights The lamps used are located as follows: S two upper deck ceiling light lamps over stairwell S two main entry door area direct ceiling lamps S two main equipment center dome lights Switches The three access light switches are located at the two key points of entry and in the flight compartment. Operation The access path illumination lamps are normally used by other systems. They are switched to the access light circuit by operating any of the FOR TRAINING PURPOSES ONLY! three access light switches. The 28−volt dc ground handling bus provides power. FRA US/T-3 PrA Apr 14, 2009 08|FLT ACC|L2 Page 18 Lufthansa Technical Training LIGHTS B747−400 FLIGHT COMPARTMENT LIGHTING 33−10 UPPER DECK DIRECT CEILING LIGHTS FLIGHT DECK ACCESS LIGHTS (P461) ATTENDANT WORKLIGHT MAIN EQUIPMENT CENTER LIGHTS STAIRWAY DOOR 1L DOOR 2L DIRECT FOR TRAINING PURPOSES ONLY! CEILING UPPER DECK ACCESS LIGHT MAIN EQUIPMENT CENTER LIGHT SWITCH ATTENDANT PANEL DOOR 2L Figure 9 Flight Deck Access Lights FRA US/T-3 PrA Apr 14, 2009 08|FLT ACC|L2 Page 19 Lufthansa Technical Training LIGHTS B747−400 FLIGHT COMPARTMENT LIGHTING 33−10 FLIGHT DECK ACCESS LIGHTS SCHEMATIC General The access path illumination lights are normally parts of other systems. The access lights relay located in the main power center left (P414), when energized by one of the three switches will transfer the lights from their normal system circuit to the access light circuit. The 28 volt dc ground handling bus provides power. FOR TRAINING PURPOSES ONLY! FRA US/T-3 PrA Apr 14, 2009 09|FLT SCH|L3 Page 20 Lufthansa Technical Training LIGHTS B747−400 FLIGHT COMPARTMENT LIGHTING 33−10 28V DC GRD HDLG BUS FLIGHT DECK MAIN EQUIPMENT CENTER ACCESS LIGHTS UPR DK DIR CLG LT RELAY UPR DK DIR CLG LTS FLT DK ACCESS LT RELAY ATTENDANT DIR CLG LT WORK LT DR 2 RELAY DR 1L DIR CLG LT DR 2L FOR TRAINING PURPOSES ONLY! FLT DK ACCESS LT 1 RELAY FLT DECK UPR DECK ACCESS ACCESS P 414 MAIN EQUIP ATT PNL FLT DK CENTER DR 2L ACCESS LTS (P461) Figure 10 Flight Deck Access Lights Schematic FRA US/T-3 PrA Apr 14, 2009 09|FLT SCH|L3 Page 21 Lufthansa Technical Training LIGHTS B747−400 PASSENGER COMPARTMENT LIGHTING 33−20 33−20 PASSENGER COMPARTMENT LIGHTING GENERAL Several systems comprise the passenger compartment lighting: S Passenger compartment illumination lights: − Provide general area illumination of the passenger compartment. S Personnel accommodation lights: − Include general area illumination lights and reading lights in the crew rest areas. S Lavatory lights: − Provide light in the lavatories. S Reading lights: − Overhead reading lights are provided for each passenger. S Passenger information signs: − No smoking, fasten seatbelt and lavatory occupied signs are located throughout the airplane in view of the passengers and attendants. S Attendant call lights: − Used to summon the flight attendant. S Galley lights: − Provide lighting in the galley areas. S Threshold lights: − Provide lighting in the doorways during passenger boarding. S Attendant work lights: − Provide overhead illumination at the attendant stations. FOR TRAINING PURPOSES ONLY! S Stairway lights; − Illuminate the individual stair treads and the area around the top of the stairway. S Closet and auxiliary lights: − Provide lighting in the closets and filter/fan service compartment. FRA US/T-3 PrA Apr 14, 2009 10|PAX COMP|L1 Page 22 Lufthansa Technical Training LIGHTS B747−400 PASSENGER COMPARTMENT LIGHTING 33−20 CREWREST LIGHTS PASSENGER COMPARTMENT ILLUMINATION LIGHTS CLOSET AND AUXILIARY LIGHTS LAVATORY LIGHTS UPPER DECK PASSENGER READING AND PASSENGER COMPARTMENT INFORMATION SIGNS ILLUMINATION LIGHTS ATTENDANT CALL LIGHTS FOR TRAINING PURPOSES ONLY! STAIRWAY LIGHTS THRESHOLD LIGHTS GALLEY PERSONNEL ATTENDANT LIGHTS ACCOMODATION WORK LIGHTS LIGHTS Figure 11 Passenger Compartment Lighting - General FRA US/T-3 PrA Apr 14, 2009 10|PAX COMP|L1 Page 23 Lufthansa Technical Training LIGHTS B747−400 PASSENGER COMPARTMENT LIGHTING 33−20 PASSENGER COMPARTMENT LIGHTS CONTROL Most of the passenger compartment lighting is controlled by the digital Advanced Cabin Entertainment/Service System (ACESS). The system allows the lighting functions to be easily reconfigured to suit various interior seating arrangements. Built−in test equipment monitors system performance and provides fault indications and status reporting. The lighting systems controlled by ACESS are: S Passenger compartment illumination lights S Door 5 overhead crew rest illumination lights S Lavatory lights S Passenger reading lights S Passenger information signs S Attendant call lights The remaining lighting uses conventional circuitry: S Flight deck crew rest lights S Flight deck access lights S Attendant reading lights S Closet and auxiliary lights S Threshold lights S Stairway lights S Attendant work lights FOR TRAINING PURPOSES ONLY! FRA US/T-3 PrA Apr 14, 2009 10|PAX COMP|L1 Page 24 Lufthansa Technical Training LIGHTS B747−400 PASSENGER COMPARTMENT LIGHTING 33−20 PASSENGER COMPARTMENT ILLUMINATION DOOR 5 OVERHEAD CREW REST LIGHTS ACESS LAVATORY LIGHTS NETWORK PASSENGER READING LIGHTS PASSENGER INFORMATION SIGNS ATTENDANT CALL LIGHTS ACESS DIGITAL ELECTRONIC LIGHTING CONTROL FLIGHT DECK CREW REST LIGHTS FLIGHT DECK ACCESS LIGHTS ATTENDANT READING LIGHTS CLOSET AND AUXILIARY LIGHTS FOR TRAINING PURPOSES ONLY! OVERSTAIR LIGHTS THRESHOLD LIGHTS STAIRWAY LIGHTS ATTENDANT WORK LIGHTS CONVENTIONAL LIGHTING CIRCUITS Figure 12 Passenger Compartment Lighting General FRA US/T-3 PrA Apr 14, 2009 10|PAX COMP|L1 Page 25 Lufthansa Technical Training LIGHTS B747−400 PASSENGER COMPARTMENT LIGHTING 33−20 PASSENGER INFORMATION SIGNS-DESCRIPTION General A passenger information sign is one of these types of signs: S NO SMOKING sign S FASTEN SEAT BELT sign S RETURN TO SEAT sign S LAVATORY OCCUPIED sign Passenger information signs give instructions to persons in the passenger compartment during a flight of the airplane. NO SMOKING and FASTEN SEAT BELT signs are installed at location to make it possible for each person to see at least one sign at all times. The RETURN TO SEAT signs are come on when the FASTEN SEAT BELT signs come on, except during a cabin decompression: There is a LAVATORY OCCUPIED sign installed on the ceiling near each lavatory. When the lavatory door is closed and locked, the sign comes on. This lets the passengers know when there is a person in the lavatory. Operation The passenger service system (PSS) controls and monitors information sign activity. Pilots’ sign control switch generates discrete inputs for PSS processing that directs NO SMOKING and FASTEN SEAT BELT activity. Lavatory door lock switch positions generate discrete inputs for PSS processing that control the LAVATORY OCCUPIED signs. NO SMOKING, FASTEN SEAT BELT, and RETURN TO SEAT signs operate in an automatic or manual mode as selected with a switch on the pilot’s control stand, P8. FOR TRAINING PURPOSES ONLY! FRA US/T-3 PrA Apr 14, 2009 11|PAX INFO|L2 Page 26 Lufthansa Technical Training LIGHTS B747−400 PASSENGER COMPARTMENT LIGHTING 33−20 PASSENGER INFORMATION SIGNS NO SMOKING SIGNS FASTEN SEATBELTS SIGNS FOR TRAINING PURPOSES ONLY! P8 PANEL Figure 13 Passenger Information Signs FRA US/T-3 PrA Apr 14, 2009 11|PAX INFO|L2 Page 27 Lufthansa Technical Training LIGHTS B747−400 PASSENGER COMPARTMENT LIGHTING 33−20 PASSENGER INFORMATION SIGNS OPERATION General ADCs If the passenger information signs module switches are in the AUTO position, Both the captain’s and first officer’s air data computer (ADC) source select the FASTEN SEAT BELTS and NO SMOKING signs in the passenger cabin relays provide ADC data to the crew alerting card. The input from the captain’s turn on automatically under certain flight conditions. The crew alerting card relay has priority. If it fails, or becomes invalid, the first officer’s relay input is monitors several inputs to determine if the passenger information signs should used. The crew alerting card monitors for an airplane altitude greater than be on or off. Information monitored includes: 10,300 feet. S Airplane altitude Decompression Relay S Flap position The decompression relay sends a discrete to the crew alerting card in the S Landing gear position event of cabin decompression (oxygen flow control unit energized). S Cabin pressure altitude Operation S Cabin decompression The passenger information sign logic sends a FASTEN SEAT BELT discrete EIU to the passenger information signs module when any of these are true: The left EFIS/EICAS interface unit (EIU) sends a digital discrete to the crew S Airplane altitude is less than 10,300 alerting card when the cabin pressure is above 10,000 feet. S Flaps are not up FCUs S Landing gear is not up and locked The left flap control unit (FCU) sends flap position data to master monitor card S Cabin pressure altitude is more than 10,000 feet A. The right FCU sends flap position data to master monitor card B. Flaps not If the FASTEN SEAT BELT switch is in the AUTO position, the FASTEN SEAT up is the parameter monitored. BELTS signs turn on. The passenger information sign logic sends a NO SMOKING discrete to the PSEU passenger information signs module when any of these are true: The proximity switch electronic unit (PSEU) provides landing gear information S Landing gear is not up and locked on two ARINC 429 busses. Bus A supplies master monitor card A. Bus B supplies master monitor card B. Information from bus A has priority. If bus A S Cabin pressure altitude is more than 10,000 feet fails, or becomes invalid, then bus B is used. Landing gear not up and locked is S Cabin decompression relay is enregized FOR TRAINING PURPOSES ONLY! the parameter monitored. If the NO SMOKING switch is in the AUTO position, the NO SMOKING signs turn on. Master Monitor Cards The master monitor cards send these parameters to the crew alerting card: S Landing gear not up and locked S Flaps not up FRA US/T-3 PrA Apr 14, 2009 12|PAX INFO|L3 Page 28 Lufthansa Technical Training LIGHTS B747−400 PASSENGER COMPARTMENT LIGHTING 33−20 28V DC FLAP LEVER BAT BUS NOT IN OXYGEN VLV RETRACT & INDICATION R37 LDG GEAR FCU P5 PANEL DECOMPRESSION NOT UP RELAY AND LOCKED PASSENGER OXYGEN PSEU OXYGEN LINE ON PRESSURIZED NO SMOKING EICAS OFF AUTO NO SMOKING OXYGEN FLOW (AUTO OUT) CONTROL UNIT CABIN PRESSURE ALTITUDE >10000 FEET ON PASS OXYGEN ON NO SMOKING OFF CPC FASTEN SEATBELT EIU - L ENTERTAINMENT/SERVICE AIRPLANE CONTROLLER AUTO FASTEN ALTITUDE EMER LIGHTS advisory message shows on the main EICAS display if the emergency lights power units. The emergency light lamps always receive their emergency lights switch not in the armed position. power from the emergency power unit batteries as do the emergency lamps in each lighted EXIT sign. Circuit breakers are located on the electrical circuit Attendants Control breaker panel P7. Each emergency light power unit contains a double ground An emergency light switch is provided at door No. 2−left in addition to the seeking logic circuit that activates a relay or a transistor switch to turn the lights switch on the pilots’ overhead panel. The switch parallels the pilots’ switch and on and off. The power for each logic circuit is derived from the power pack and has two settings, ON and NORMAL. is independent of airplane power. NORMAL: OPERATION It provides a ground path for the pilots’ switch. All light control authority remains with the pilots’ switch. Pilots Control Controls for operation of the emergency lighting system are located on the ON: pilots’ overhead panel and include a guarded three−position toggle switch. The emergency lights will come on whether or not the 28− volt DC−Bus 4 is When the guard is manually opened (switch unguarded) the toggle switch can activated and independent of the settings of the pilots’ emergency lights switch. be moved to the ON, OFF, or ARMED position. The switch is forced into the The pilots’ switch will not function electrically under this condition. ARMED position when the guard is closed and cannot be switched to the ON or OFF position. Indication An >EMER LIGHTS advisory message shows on the main EICAS display if the OFF: attendant’s switch is used to turn the emergency lights on. The emergency lighting system is off whether or not the 28−volt DC−Bus 4 is energized. This is the normal setting of the switch when the airplane is parked. CAUTION: THE EMERGENCY LIGHTS SWITCH SHOULD ALWAYS BE The power unit batteries are supplied with a trickle charge when the 28−volt PLACED IN THE OFF POSITION WHENEVER POWER IS NOT DC−Bus 4 is energized. AVAILABLE TO PREVENT EMERGENCY LIGHTS FROM TURNING ON AND DISCHARGING BATTERIES. ARMED: Airplane Storage FOR TRAINING PURPOSES ONLY! The emergency lights will come on if power is not available from the 28−volt DC−Bus 4. This is the normal setting of the switch during airplane operation. For periods up to six days of storage, no special procedures are required if The lights will remain off and the power unit batteries are supplied with a trickle emergency light system was completely charged at the beginning of storage charge when 28−volt DC−Bus 4 is energized. period and no operation had occurred during storage. CAUTION: IF POWER HAS NOT BEEN APPLIED TO INSTALLED ON: EMERGENCY LIGHT SYSTEM DURING A LAYUP OF SIX The emergency lights will come on whether or not the 28−volt DC−Bus 4 is DAYS OR MORE, AVOID TURNING ON ANY ASSEMBLY FOR energized. A MINIMUM OF 16 HOURS AFTER APPLICATION OF POWER, AND 20 HOURS OR MORE IS DESIRABLE BEFORE PERFORMING A SYSTEM FUNCTIONAL TEST. FRA US/T-3 PrA Apr 14, 2009 25|EMER CTL|L3 Page 70 Lufthansa Technical Training LIGHTS B747−400 EMERGENCY LIGHTS 33−50 TO PIN 2 OF CHG EMER LT FWD ALL FWD UNITS 28V DC BUS 4 CHG EMER LT AFT TO PIN 2 OF ALL AFT UNITS 6 5 2 3 4 P7 PANEL CHARGING TO PIN 3 CIRCUIT LOGIC OF ALL CIRCUIT UNITS PWR FOR LOGIC CKT + TO PIN 4 − OF ALL UNITS 1 OFF ARM 7 8 9 ON EMERGENCY LIGHT POWER SUPPLY 6VDC P5 PANEL NOTE: EMERGENCY LIGHTS SWITCH ____ NORMAL LOCATED ON THE DOOR ATTENDANT’S PANEL OR THE ATTENDANT’S HANDSET 1 GROUND OR LOGIC LOW IS PLACED ON PIN A6 WHENEVER EMERGENCY 1 LIGHTS CONTROL SWITCH ON P5 7 LIGHTS FOR TRAINING PURPOSES ONLY! PANEL IS NOT IN ARMED POSITION EXIT SIGN (EXAMPLE) OR EMERGENCY LIGHTS SWITCH ON ON DR 2L ATTENDANTS PANEL IS IN ON POSITION. EMERGENCY LIGHTS ATTENDANT PANEL A6 EICAS EIU Figure 35 Emergency Lights Schematic FRA US/T-3 PrA Apr 14, 2009 25|EMER CTL|L3 Page 71 B744 33 L3 TABLE OF CONTENTS ATA 33 LIGHTS............................ 1 WINGTIP AND AFT STROBE LIGHTS-DESCRIPTION 52