737-600/700/800/900 Aircraft Maintenance Manual Chapter 36 Pneumatic PDF

CHAPTER 36 Pneumatic PJW  737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL CHAPTER 36...

CHAPTER 36 Pneumatic PJW  737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL CHAPTER 36 PNEUMATIC Subject/Page Date COC Subject/Page Date COC 36-EFFECTIVE PAGES 36-11-00 (cont.) 1 thru 2 Oct 15/2019 3 Feb 15/2015 36-CONTENTS 4 Feb 15/2015 1 Jun 15/2016 5 Feb 15/2015 2 Feb 15/2015 6 Feb 15/2015 36-00-00 1 Feb 15/2015 7 Feb 15/2015 2 Jun 15/2019 8 Feb 15/2015 3 Feb 15/2015 9 Feb 15/2015 4 Jun 15/2019 10 Feb 15/2015 5 Jun 15/2019 11 Feb 15/2015 6 Feb 15/2015 12 Feb 15/2015 7 Feb 15/2015 13 Feb 15/2015 8 Feb 15/2015 14 Feb 15/2015 9 Jun 15/2016 15 Feb 15/2015 10 Jun 15/2016 16 Jun 15/2019 11 Feb 15/2015 17 Feb 15/2015 12 Jun 15/2019 36-10-00 18 Jun 15/2016 1 Feb 15/2015 19 Feb 15/2015 2 Feb 15/2015 20 Jun 15/2016 3 Feb 15/2015 21 Jun 15/2016 4 Jun 15/2019 22 BLANK 36-11-00 36-12-00 1 Feb 15/2015 1 Feb 15/2015 2 Feb 15/2015 2 Feb 15/2015 A = Added, R = Revised, D = Deleted, O = Overflow, C = Customer Originated Change 36-EFFECTIVE PAGES Page 1 D633A101-RYR Oct 15/2019 ECCN 9E991 BOEING PROPRIETARY - Copyright © Unpublished Work - See title page for details PJW  737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL CHAPTER 36 PNEUMATIC Subject/Page Date COC Subject/Page Date COC 36-12-00 (cont.) 36-13-00 (cont.) 3 Feb 15/2015 11 Feb 15/2015 4 Feb 15/2015 12 Feb 15/2015 5 Feb 15/2015 13 Feb 15/2015 6 Feb 15/2015 14 BLANK 36-14-00 7 Feb 15/2015 1 Feb 15/2015 8 Feb 15/2015 2 Feb 15/2015 9 Feb 15/2015 3 Feb 15/2015 10 Feb 15/2015 4 Feb 15/2015 11 Feb 15/2015 5 Feb 15/2015 12 Feb 15/2015 6 Feb 15/2015 13 Feb 15/2015 7 Feb 15/2015 14 BLANK 8 BLANK 36-13-00 36-20-00 1 Feb 15/2015 1 Feb 15/2015 2 Jun 15/2019 2 Feb 15/2015 3 Feb 15/2015 3 Feb 15/2015 4 Feb 15/2015 4 Oct 15/2017 5 Feb 15/2015 5 Feb 15/2015 6 Jun 15/2016 6 Feb 15/2015 7 Feb 15/2015 7 Feb 15/2015 8 Jun 15/2016 8 Oct 15/2017 9 Feb 15/2015 9 Feb 15/2015 10 BLANK 10 Jun 15/2016 A = Added, R = Revised, D = Deleted, O = Overflow, C = Customer Originated Change 36-EFFECTIVE PAGES Page 2 D633A101-RYR Oct 15/2019 ECCN 9E991 BOEING PROPRIETARY - Copyright © Unpublished Work - See title page for details  737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL CHAPTER 36 PNEUMATIC CH-SC-SU SUBJECT PAGE EFFECT 36-00-00 PNEUMATIC - INTRODUCTION 2 RYR ALL 36-00-00 PNEUMATIC - COMPONENT LOCATIONS 6 RYR ALL 36-00-00 PNEUMATIC - FUNCTIONAL DESCRIPTION 9 RYR ALL 36-10-00 PNEUMATIC - DISTRIBUTION - INTRODUCTION 2 RYR ALL 36-11-00 PNEUMATIC - ENGINE BLEED AIR - INTRODUCTION 2 RYR ALL 36-11-00 PNEUMATIC - ENGINE BLEED AIR - BLEED AIR CHECK VALVE (5TH 4 RYR ALL STAGE) 36-11-00 PNEUMATIC - ENGINE BLEED AIR - HIGH STAGE REGULATOR/VALVE 6 RYR ALL 36-11-00 PNEUMATIC - ENGINE BLEED AIR - HIGH STAGE REGULATOR/VALVE - 8 RYR ALL FUNCTIONAL DESCRIPTION 36-11-00 PNEUMATIC - ENGINE BLEED AIR - BAR AND PRSOV 10 RYR ALL 36-11-00 PNEUMATIC - ENGINE BLEED AIR - 450F THERMOSTAT 12 RYR ALL 36-11-00 PNEUMATIC - ENGINE BLEED AIR - BAR, 450F THERMOSTAT, AND 14 RYR ALL PRSOV - FUNCTIONAL DESCRIPTION 36-11-00 PNEUMATIC - ENGINE BLEED AIR - 490F OVERTEMPERATURE SWITCH 16 RYR ALL 36-11-00 PNEUMATIC - ENGINE BLEED AIR - BLEED AIR CONTROL CIRCUIT - 18 RYR ALL FUNCTIONAL DESCRIPTION 36-11-00 PNEUMATIC - ENGINE BLEED AIR - FUNCTIONAL DESCRIPTION 20 RYR ALL 36-12-00 PNEUMATIC - BLEED AIR PRECOOLER SYSTEM - INTRODUCTION 2 RYR ALL 36-12-00 PNEUMATIC - BLEED AIR PRECOOLER SYSTEM - PRECOOLER 4 RYR ALL 36-12-00 PNEUMATIC - BLEED AIR PRECOOLER SYSTEM - PRECOOLER 6 RYR ALL CONTROL VALVE 36-CONTENTS Page 1 D633A101-RYR Jun 15/2016 ECCN 9E991 BOEING PROPRIETARY - Copyright © Unpublished Work - See title page for details  737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL CHAPTER 36 PNEUMATIC CH-SC-SU SUBJECT PAGE EFFECT 36-12-00 PNEUMATIC - BLEED AIR PRECOOLER SYSTEM - PRECOOLER 8 RYR ALL CONTROL VALVE SENSOR 390F 36-12-00 PNEUMATIC - BLEED AIR PRECOOLER SYSTEM - WTAI SOLENOID 10 RYR ALL VALVE 36-12-00 PNEUMATIC - BLEED AIR PRECOOLER SYSTEM - FUNCTIONAL 12 RYR ALL DESCRIPTION 36-13-00 PNEUMATIC - MANIFOLD SYSTEM - INTRODUCTION 2 RYR ALL 36-13-00 PNEUMATIC - MANIFOLD SYSTEM - DUCT 4 RYR ALL 36-13-00 PNEUMATIC - MANIFOLD SYSTEM - DUCT INSULATION 6 RYR ALL 36-13-00 PNEUMATIC - MANIFOLD SYSTEM - GROUND PNEUMATIC CONNECTOR 8 RYR ALL CHECK VALVE 36-13-00 PNEUMATIC - MANIFOLD SYSTEM - BLEED AIR ISOLATION VALVE 10 RYR ALL 36-13-00 PNEUMATIC - MANIFOLD SYSTEM - BLEED AIR ISOLATION VALVE - 12 RYR ALL FUNCTIONAL DESCRIPTION 36-14-00 PNEUMATIC - APU BLEED SYSTEM - INTRODUCTION 2 RYR ALL 36-14-00 PNEUMATIC - APU BLEED SYSTEM - APU CHECK VALVE 4 RYR ALL 36-14-00 PNEUMATIC - APU BLEED SYSTEM - DUAL BLEED LIGHT - FUNCTIONAL 6 RYR ALL DESCRIPTION 36-20-00 PNEUMATIC - INDICATING - INTRODUCTION 2 RYR ALL 36-20-00 PNEUMATIC - INDICATING - DUCT PRESSURE TRANSDUCER 4 RYR ALL 36-20-00 PNEUMATIC - INDICATING - DUAL DUCT PRESSURE INDICATOR 6 RYR ALL 36-20-00 PNEUMATIC - INDICATING - FUNCTIONAL DESCRIPTION 8 RYR ALL 36-CONTENTS Page 2 D633A101-RYR Feb 15/2015 ECCN 9E991 BOEING PROPRIETARY - Copyright © Unpublished Work - See title page for details  737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL THIS PAGE IS INTENTIONALLY LEFT BLANK 36-00-00 Page 1 D633A101-RYR Feb 15/2015 ECCN 9E991 BOEING PROPRIETARY - Copyright © Unpublished Work - See title page for details  737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL PNEUMATIC - INTRODUCTION Purpose RYR 174-179, 182-187, 189-203, 205-209, 212-220, 223, 224, 231-299, 301-308, 311, 313-999; RYR 006-009, 013, 014, 016, 018-020, 026-041, 043, The pneumatic system supplies compressed air to the airplane user 044, 046, 047, 049-064, 067-081, 083-103, 106-108, 111-114, 117-119, systems. 121-132, 134-169 POST SB 737-47-1003 Inert gas system General Description RYR ALL These are the sources of pneumatic power: Hydraulic reservoir pressurization system. Engine 1 bleed air system Pneumatic system controls and indications are on the P5-10 air conditioning panel. The controls and indications use 28v DC and 115v AC. Engine 2 bleed air system Auxiliary power unit (APU) bleed air system Training Information Point Pneumatic ground air connection. The air in the pneumatic system is hot and under high pressure. Make sure The pneumatic manifold collects the compressed air from the sources and you depressurize the pneumatic system before you work on it. supplies it to the user systems. Abbreviations and Acronyms Valves in the manifold do these things: ACAU - air conditioning accessory unit Control the flow of bleed air into the manifold APU - auxiliary power unit Isolate the manifold into left and right sides BAR - bleed air regulator Control the flow of manifold air into the user systems. BAV - bleed air valve These are the airplane systems that use pneumatic power: C - Celsius CTAI - cowl thermal anti-ice Engine start systems F - Fahrenheit Air conditioning and pressurization systems ISO valve - isolation valve Engine inlet cowl anti-ice systems PRSOV - pressure regulator and shutoff valve Wing thermal anti-ice systems TAT - total air temperature Water tank pressurization system XFER - transfer XMTR - transmitter WTAI - wing thermal anti-ice EFFECTIVITY 36-00-00 36-00-00-201 RYR ALL Page 2 D633A101-RYR Jun 15/2019 ECCN 9E991 BOEING PROPRIETARY - Copyright © Unpublished Work - See title page for details  737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL 0 28V DC P5 PANEL ELECTRIC AND CONTROLS AND POWER AIR CONDITIONING SOURCES 115V AC DISPLAYS ACCESSORY UNIT ENGINE 1 START ENGINE 1 BLEED AIR ENGINE 1 COWL ANTI-ICE LEFT WING THERMAL ANTI-ICE LEFT AIR CONDITIONING PACK HYDRAULIC RESERVOIR PRESSURIZATION PNEUMATIC APU POWER BLEED AIR AIRPLANE SOURCES WATER TANK PRESSURIZATION USER SYSTEMS ENGINE 2 START PNEUMATIC ENGINE 2 COWL ANTI-ICE GROUND CONNECTION RIGHT WING THERMAL ANTI-ICE RIGHT AIR CONDITIONING PACK ENGINE 2 BLEED AIR HYDRAULIC RESERVOIR PRESSURIZATION PNEUMATIC MANIFOLD M87238 S0004631014_V1 PNEUMATIC - INTRODUCTION EFFECTIVITY 36-00-00 36-00-00-201 RYR ALL Page 3 D633A101-RYR Feb 15/2015 ECCN 9E991 BOEING PROPRIETARY - Copyright © Unpublished Work - See title page for details  737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL P5 PANEL ELECTRIC 28V DC AND CONTROLS AND POWER AIR CONDITIONING 115V AC DISPLAYS SOURCES ACCESSORY UNIT ENGINE 1 START ENGINE 1 BLEED AIR ENGINE 1 COWL ANTI-ICE LEFT WING THERMAL ANTI-ICE LEFT AIR CONDITIONING PACK NITROGEN GAS GENERATION SYSTEM APU PNEUMATIC BLEED AIR HYDRAULIC RESERVOIR PRESSURIZATION POWER AIRPLANE SOURCES WATER TANK PRESSURIZATION USER SYSTEMS TAT PROBE ASPIRATION PNEUMATIC ENGINE 2 START GROUND CONNECTION ENGINE 2 COWL ANTI-ICE RIGHT WING THERMAL ANTI-ICE ENGINE 2 BLEED AIR RIGHT AIR CONDITIONING PACK HYDRAULIC RESERVOIR PRESSURIZATION PNEUMATIC MANIFOLD J75490 S0000178140_V2 PNEUMATIC - INTRODUCTION EFFECTIVITY 36-00-00 36-00-00-201 RYR 174-179, 182-187, 189-203, 205-209, 212-220, 223, 224, 231-299, 301-308, 311, 313-999; RYR 006-009, 013, 014, 016, 018-020, 026-041, 043, 044, 046, 047, 049-064, 067-081, 083-103, 106-108, 111-114, 117-119, 121-132, 134-169 POST SB Page 4 737-47-1003 D633A101-RYR Jun 15/2019 ECCN 9E991 BOEING PROPRIETARY - Copyright © Unpublished Work - See title page for details  737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL THIS PAGE IS INTENTIONALLY LEFT BLANK 36-00-00 Page 5 D633A101-RYR Jun 15/2019 ECCN 9E991 BOEING PROPRIETARY - Copyright © Unpublished Work - See title page for details  737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL PNEUMATIC - COMPONENT LOCATIONS Engine Bleed Air The engine bleed system components are on the engine compressor cases and in the engine struts. Pneumatic Manifold The pneumatic manifold (crossover duct) is in these areas: The leading edges of the wing inboard of the engine struts The crossover duct is in the forward areas of the air conditioning pack bays The keel beam. APU Bleed Air The APU and the APU bleed system components are in a torque box in the 48 section. The APU bleed air duct is in these areas: Along the right side of the APU torque box Through section 48 and the aft pressure bulkhead Along the left side and forward bulkhead of the aft cargo compartment In the keel beam. Controls and Indication The pneumatic system controls and indications are on the air conditioning/bleed air controls panel in the flight compartment. EFFECTIVITY 36-00-00 36-00-00-202 RYR ALL Page 6 D633A101-RYR Feb 15/2015 ECCN 9E991 BOEING PROPRIETARY - Copyright © Unpublished Work - See title page for details  737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL 0 APU P5 OVERHEAD APU BLEED AIR DUCT PANEL CONTROLS AND INDICATIONS ENGINE BLEED AIR COMPONENTS PNEUMATIC GROUND PNEUMATIC MANIFOLD CONNECTION (CROSSOVER DUCT) M87242 S0004631019_V2 PNEUMATIC - COMPONENT LOCATIONS EFFECTIVITY 36-00-00 36-00-00-202 RYR ALL Page 7 D633A101-RYR Feb 15/2015 ECCN 9E991 BOEING PROPRIETARY - Copyright © Unpublished Work - See title page for details  737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL THIS PAGE IS INTENTIONALLY LEFT BLANK 36-00-00 Page 8 D633A101-RYR Feb 15/2015 ECCN 9E991 BOEING PROPRIETARY - Copyright © Unpublished Work - See title page for details  737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL PNEUMATIC - FUNCTIONAL DESCRIPTION General Pneumatic Manifold The pneumatic system supplies hot, high pressure air to the systems on the The pneumatic manifold gets high pressure air from the source systems and airplane that use air. supplies it to the user systems. The pneumatic manifold has these features: These are the sources of pneumatic power: An isolation valve that can separate the manifold into left and right sides Engine bleed air Two duct pressure transmitters (for left and right manifold pressure indication) APU A ground pneumatic connector with a check valve (for an external Ground source. source of pneumatic power) Engine Bleed Air Pressure taps and interfaces for user system valves. There is one bleed air system for each engine. The engine bleed system Controls and Indications controls bleed air temperature and pressure. The air conditioning/bleed air controls panel has control switches and lights Engine bleed air comes from the 5th and 9th stages of the high pressure to control and monitor the pneumatic system. compressor. A high stage regulator and high stage valve control the flow of 9th stage bleed air. The 5th stage check valve prevents reverse flow into the The DUAL BLEED light is an amber light that comes on when the APU bleed 5th stage. valve is open and: A bleed air regulator and the pressure regulator and shutoff valve (PRSOV) Number 1 engine bleed switch on, or control the flow of bleed air to the pneumatic manifold. Number 2 engine bleed switch on and isolation valve open. The air conditioning accessory unit (ACAU) contains relays, and is an The dual duct pressure indicator shows the pressure in the left and right interface between the air conditioning/bleed air controls panel switches and pneumatic manifold. lights. The isolation valve switch has these three positions: Engine Bleed Air Precooler System CLOSE - isolates left and right pneumatic manifold The precooler system controls the engine bleed air temperature. The AUTO - the valve opens automatically if any pack or engine bleed precooler control valve, precooler control valve sensor, and WTAI solenoid switch is put in the OFF position valve control the flow of fan air to the precooler. OPEN - connects left and right pneumatic systems. APU Bleed Air The trip reset switch is used to reset a bleed trip off condition. The APU supplies bleed air to the pneumatic manifold. An APU check valve The engine bleed switch has these two positions: protects the APU from engine bleed air flow. OFF - closes the PRSOV ON - opens the PRSOV. EFFECTIVITY 36-00-00 36-00-00-239 RYR ALL Page 9 D633A101-RYR Jun 15/2016 ECCN 9E991 BOEING PROPRIETARY - Copyright © Unpublished Work - See title page for details  737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL PNEUMATIC - FUNCTIONAL DESCRIPTION The BLEED TRIP OFF lights are amber lights. There is one BLEED TRIP OFF light for the left and right pneumatic manifold. They turn on when the pneumatic system has an overpressure or overtemperature condition. The APU bleed switch has these two positions: OFF - closes the APU bleed valve ON - opens the APU bleed valve. EFFECTIVITY 36-00-00 36-00-00-239 RYR ALL Page 10 D633A101-RYR Jun 15/2016 ECCN 9E991 BOEING PROPRIETARY - Copyright © Unpublished Work - See title page for details  737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL OVERPRESSURE PRECOOLER 0 5TH STAGE BLEED AIR WTAI CHECK VALVE SWITCH CONTROL VALVE REGULATOR SOLENOID VALVE DUAL RAM DOOR b RAM DOOR b BLEED a FULL OPEN FULL OPEN ENGINE L RECIRC FAN R RECIRC FAN OFF OFF START VALVE AUTO AUTO 60 80 DUCT OVHT 40 PRESS PS I 20 0 TEST ACAU 1 L PACK ISOLATION R PACK 5TH OFF VALVE OFF STAGE 450 ˚F AUTO HIGH AUTO AUTO HIGH (232 ˚C) WING WING 9TH THERMOSTAT ANTI ICE PACK a OPEN PACK a ANTI ICE STAGE WING-BODY TRIP WING-BODY 390 ˚F (199 ˚C) OVERHEAT a BLEED a OVERHEAT a BLEED a PRECOOLER TRIP OFF RESET TRIP OFF CTRL VALVE OFF OFF PRSOV SENSOR ON ON HIGH 1 APU 2 HIGH STAGE PRECOOLER TO ENGINE STAGE BLEED REGULATOR 490 ˚F (254 ˚C) START VALVE OVERTEMP SW PRESS AIR CONDITIONING/BLEED AIR XMTR CONTROLS PANEL WTAI ISO VALVE VALVE L PACK NOTE: LEFT SYSTEM SHOWN - GND APU CHECK VALVE RIGHT SYSTEM THE SAME CONNECTOR VALVE HYDRAULIC 1 TO ENGINE NOSE COWL PRESSURE WATER TANK FROM APU ANTI-ICE VALVE PRESSURE M87245 S0004631024_V2 PNEUMATIC - FUNCTIONAL DESCRIPTION EFFECTIVITY 36-00-00 36-00-00-239 RYR ALL Page 11 D633A101-RYR Feb 15/2015 ECCN 9E991 BOEING PROPRIETARY - Copyright © Unpublished Work - See title page for details  737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL 5TH-STAGE OVERPRESSURE PRECOOLER BLEED AIR WTAI SOLENOID CHECK VALVE SWITCH CONTROL VALVE REGULATOR VALVE b b DUAL RAM DOOR RAM DOOR ENGINE BLEED a FULL OPEN FULL OPEN START RECIRC FAN OFF VALVE AUTO 40 60 OVHT 80 PSI 0 100 1 ACAU TEST L PACK R PACK 5TH- ISOLATION STAGE 450 ˚F OFF AUTO VALVE OFF AUTO (232 ˚C) HIGH AUTO HIGH 9TH- THERMOSTAT WING ANTI OPEN WING ANTI PACK PACK ICE TRIP OFF TRIP OFF ICE STAGE WING-BODY a TRIP WING-BODY a 390 ˚F (199 ˚C) OVERHEAT a a OVERHEAT a a BLEED BLEED PRECOOLER TRIP OFF RESET TRIP OFF CTRL VALVE OFF OFF PRSOV HIGH HIGH SENSOR PRECOOLER ON ON STAGE STAGE 490 ˚F (254 ˚C) TO ENGINE 1 APU 2 BLEED REGULATOR VALVE OVERTEMP SW START PRESS AIR CONDITIONING/BLEED AIR XMTR CONTROLS PANEL WTAI ISO VALVE VALVE NITROGEN GENERATION SYSTEM APU CHECK L PACK VALVE GND VALVE ____ NOTE: LEFT SYSTEM IS SHOWN, CONNECTOR RIGHT SYSTEM IS THE SAME. HYDRAULIC PRESSURE FROM APU 1 TO ENGINE NOSE COWL RESERVOIR WATER TANK ANTI-ICE VALVE AND TAT PROBE J75176 S0000178141_V3 PNEUMATIC - FUNCTIONAL DESCRIPTION EFFECTIVITY 36-00-00 36-00-00-239 RYR 174-179, 182-187, 189-203, 205-209, 212-220, 223, 224, 231-299, 301-308, 311, 313-999; RYR 006-009, 013, 014, 016, 018-020, 026-041, 043, 044, 046, 047, 049-064, 067-081, 083-103, 106-108, 111-114, 117-119, 121-132, 134-169 POST SB Page 12 737-47-1003 D633A101-RYR Jun 15/2019 ECCN 9E991 BOEING PROPRIETARY - Copyright © Unpublished Work - See title page for details  737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL THIS PAGE IS INTENTIONALLY LEFT BLANK 36-10-00 Page 1 D633A101-RYR Feb 15/2015 ECCN 9E991 BOEING PROPRIETARY - Copyright © Unpublished Work - See title page for details  737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL PNEUMATIC - DISTRIBUTION - INTRODUCTION Purpose The pneumatic manifold has two pressure transmitters. One transmitter is on the right side of the manifold and the other is on the left side. They The pneumatic distribution system supplies compressed air to the user measure the manifold pressures. Pressure indication is on the air systems. conditioning panel. General Description The right side of the manifold has a pneumatic ground air connector. The distribution system has these subsystems: Valves on the pneumatic manifold control the flow of air to the user systems. The user systems control the operation of these valves. Engine bleed air system Training Information Point APU bleed air system Pneumatic ground air connection Do not supply more than 75 psi of pressure to the pneumatic system. If you supply too much pressure, damage to equipment and injuries to personnel Pneumatic manifold system. can occur. Engine Bleed Air System There are two engine bleed air systems, one for each engine. Engine bleed air is from the 5th and 9th stages of the engine high pressure compressors. At low engine speeds, bleed air comes from the 9th stage. At high engine speeds, bleed air comes from the 5th stage. APU Bleed Air System The APU load compressor supplies bleed air on the ground and in the air. Pneumatic Ground Air Connection The pneumatic ground air connection provides for the connection of a ground pneumatic cart. The pneumatic cart can supply bleed air for engine start and ground use of the air conditioning system. Pneumatic Manifold System The pneumatic manifold system gets bleed air from the engines, APU, or pneumatic ground cart. A bleed air isolation valve divides the pneumatic manifold into left and right sides. The normal position of this valve is closed. Because of this, a single duct failure cannot cause a loss of pressure to the whole pneumatic manifold. EFFECTIVITY 36-10-00 36-10-00-203 RYR ALL Page 2 D633A101-RYR Feb 15/2015 ECCN 9E991 BOEING PROPRIETARY - Copyright © Unpublished Work - See title page for details  737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL 0 CTAI VALVE HYD RSVR PRESS HYD RSVR PRESS CTAI VALVE CONNECTION CONNECTION WTAI VALVE ISOLATION WTAI VALVE VALVE ENGINE START PRESS PRESS ENGINE START XMTR XMTR 5TH OR 5TH OR 9TH STAGE 9TH STAGE ENGINE 1 ENGINE 2 L PACK VALVE R PACK VALVE PNEUMATIC GROUND WATER TANK AIR CONNECTION PRESS CONNECTION FROM APU M87254 S0004631034_V1 PNEUMATIC - DISTRIBUTION - INTRODUCTION EFFECTIVITY 36-10-00 36-10-00-203 RYR ALL Page 3 D633A101-RYR Feb 15/2015 ECCN 9E991 BOEING PROPRIETARY - Copyright © Unpublished Work - See title page for details  737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL CTAI VALVE NITROGEN GENERATION HYD RSVR PRESS CTAI VALVE SYSTEM CONNECTION CONNECTION WTAI VALVE ISOLATION WTAI VALVE VALVE ENGINE START PRESS PRESS ENGINE START XMTR XMTR 5TH- OR 5TH- OR 9TH-STAGE 9TH-STAGE ENGINE 1 ENGINE 2 L PACK VALVE R PACK VALVE WATER TANK PNEUMATIC GROUND PRESS CONNECTION AIR CONNECTION FROM APU J75178 S0000178144_V1 PNEUMATIC - DISTRIBUTION - INTRODUCTION EFFECTIVITY 36-10-00 36-10-00-203 RYR 174-179, 182-187, 189-203, 205-209, 212-220, 223, 224, 231-299, 301-308, 311, 313-999; RYR 006-009, 013, 014, 016, 018-020, 026-041, 043, 044, 046, 047, 049-064, 067-081, 083-103, 106-108, 111-114, 117-119, 121-132, 134-169 POST SB Page 4 737-47-1003 D633A101-RYR Jun 15/2019 ECCN 9E991 BOEING PROPRIETARY - Copyright © Unpublished Work - See title page for details  737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL THIS PAGE IS INTENTIONALLY LEFT BLANK 36-11-00 Page 1 D633A101-RYR Feb 15/2015 ECCN 9E991 BOEING PROPRIETARY - Copyright © Unpublished Work - See title page for details  737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL PNEUMATIC - ENGINE BLEED AIR - INTRODUCTION Purpose The engine bleed air distribution system supplies pressure regulated air to the pneumatic manifold. General Description Bleed air comes from the 9th and 5th stages of the engine high stage compressors. At low engine speed, the pneumatic system uses 9th stage bleed air. 5th stage air is not sufficient for pneumatic system demands at low engine speeds. At low engine speed the high stage regulators and high stage valves control the pressure of the engine bleed air. At low engine speed the 5th stage check valves prevent reverse flow. At high engine speed the high stage valves close and the 5th stage check valves open to supply bleed air to the pressure regulating shutoff valves. The air conditioning bleed air controls panel has engine bleed switches to control the pressure regulating shutoff valves. Also, there are BLEED TRIP OFF lights to show overpressure or overtemperature. The bleed air regulators and pressure regulator and shutoff valves control the flow of engine bleed air to the pneumatic manifold. The bleed air regulators have overpressure switches to prevent overpressure conditions and turn on the BLEED TRIP OFF lights. The 450F (232C) thermostats make the pressure regulating and shutoff valves move towards closed when the temperature gets to 450F (232C). The air conditioning accessory unit (ACAU) is an interface between the air conditioning bleed air controls panel and the pressure regulating shutoff valves. The 490F (254C) overheat switches turn on the BLEED TRIP OFF lights and close the pressure regulating shutoff valves. This prevents overheat damage to the pneumatic manifold and user systems. EFFECTIVITY 36-11-00 36-11-00-237 RYR ALL Page 2 D633A101-RYR Feb 15/2015 ECCN 9E991 BOEING PROPRIETARY - Copyright © Unpublished Work - See title page for details  737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL 0 490F/254C OVERTEMP SW BLEED AIR ACAU (2) REGULATOR 5TH STAGE ENGINE BLEED SW BLEED TRIP OFF 5TH STAGE CHECK VALVE AIR CONDITIONING BLEED AIR CONTROLS PANEL TO THE PNEUMATIC MANIFOLD 9TH STAGE PRESSURE REGULATING AND SHUTOFF VALVE HIGH STAGE VALVE HIGH STAGE 450F/232C REGULATOR THERMOSTAT M87277 S0004631042_V1 PNEUMATIC - ENGINE BLEED AIR - INTRODUCTION EFFECTIVITY 36-11-00 36-11-00-237 RYR ALL Page 3 D633A101-RYR Feb 15/2015 ECCN 9E991 BOEING PROPRIETARY - Copyright © Unpublished Work - See title page for details  737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL PNEUMATIC - ENGINE BLEED AIR - BLEED AIR CHECK VALVE (5TH STAGE) Purpose The 5th stage bleed air check valve prevents 9th stage bleed air flow into the 5th stage bleed port. Physical Description The bleed air check valve is a split-flapper check valve. Location The bleed air check valve is part of the engine bleed air manifold. It is on the left side of the engine high pressure compressor case. Functional Description The valve lets air flow go in the direction of the arrow. It stops air flow in the opposite direction. Two semicircular flappers control air flow. Normal airflow opens the flappers. Reverse airflow closes the flappers. Training Information Point Install the bleed air check valve so that the flow arrow points away from the 5th stage bleed port. Align the flange clamps correctly and torque to specifications. Improperly aligned or loose clamps may interfere with engine components or the inner thrust reverser cowls. EFFECTIVITY 36-11-00 36-11-00-209 RYR ALL Page 4 D633A101-RYR Feb 15/2015 ECCN 9E991 BOEING PROPRIETARY - Copyright © Unpublished Work - See title page for details  737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL 0 ENGINE - LEFT SIDE BLEED AIR CHECK VALVE (5TH STAGE) M87262 S0004631044_V1 PNEUMATIC - ENGINE BLEED AIR - BLEED AIR CHECK VALVE (5TH STAGE) EFFECTIVITY 36-11-00 36-11-00-209 RYR ALL Page 5 D633A101-RYR Feb 15/2015 ECCN 9E991 BOEING PROPRIETARY - Copyright © Unpublished Work - See title page for details  737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL PNEUMATIC - ENGINE BLEED AIR - HIGH STAGE REGULATOR/VALVE Purpose Training Information Point The high stage regulator controls the high stage valve. The high stage regulator and high stage valve can be tested using external test equipment. The high stage valve controls the flow of bleed air from the 9th stage engine bleed air manifold. Physical Description The high stage regulator has these parts: Supply pressure port Downstream sense port Control pressure port Reverse flow mechanism Pressure regulator mechanism Relief valve Pneumatic shutoff mechanism. The high stage valve is a butterfly valve, spring loaded to the closed position. The valve has these parts: Pneumatic actuator Valve flow body with direction of flow arrow Relief valve Manual override and position indicator. Location The high stage regulator is on the engine core area at the 10:00 position. The high stage valve is on the engine core area at the 8:00 position. Operation The operation of the high stage regulator is automatic. There are no operational controls. The operation of the high stage valve is automatic. Also there is a manual override to lock the valve in the closed position. EFFECTIVITY 36-11-00 36-11-00-207 RYR ALL Page 6 D633A101-RYR Feb 15/2015 ECCN 9E991 BOEING PROPRIETARY - Copyright © Unpublished Work - See title page for details  737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL 0 RELIEF REGULATOR VALVE MECHANISM