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BOEING 737 MAINTENANCE MANUAL
CHAPTER 73 TAB EFFECTIVE PAGES SEE LAST PAGE OF LIST FOR NUMBER OF PAGES CONTENTS 73 1 SEP 20/81 5062 OCT 20/84 504 73- 14-0 1 FEB 15/67 5022 MAY 15/68 5023 MAY 15/77 5634 NOV 01/74 502 73- 14-0 101 FEB 15/78 501102 FEB 15/78 501 73- 14-0 501 MAY 15/67 500502 MAY 15/67 500 73- 14- 11 401 FEB 20/88 500402 FEB 20/88 500 73- 14- 21 401 OCT 20/89 500402 FEB 15/73 500 73- 14- 21 501 FEB 15/79 500502 FEB 15/79 500 73- 14- 31 401 SEP 20/81 500402 SEP 20/81 500403 SEP 20/81 500404 BLANK 73- 31-0 1 OCT 20/85 5C82 NOV 15/66 5003 NOV 15/66 5004 NOV 15/78 5065 NOV 15/78 5206 APR 15/66 500 73- 31-0 101 JUN 20/91 5C8102 JUN 20/91 500103 NOV 01/98 500104 BLANK 73- 31- 01 1 OCT 20/89 5322 FEB 15/71 5293 FEB 15/71 529 PAGE DATE CODE 73- 31- 01 (CONTINUED)4 FEB 15/71 529 73- 31- 01 101 JUN 20/91 503102 JUN 20/91 503103 MAY 01/99 503104 BLANK 73- 31- 11 401 JUN 20/92 527402 JUN 20/93 500403 JUN 20/92 530404 MAY 15/78 500 73- 31- 12 401 JUN 20/85 5C8402 JUN 20/93 505403 JUN 20/92 530404 FEB 20/91 505 73- 31- 21 401 NOV 15/67 500402 BLANK PAGE DATE CODE PAGE DATE CODE PAGE DATE CODE
* = REVISED, ADDED OR DELETED PAGE F = FOLDOUT PAGE C8 CHAPTER 73 EFFECTIVE PAGES MAY 01/01 PAGE 1
TABLE OF CONTENTS Subject Subject No. ENGINE FUEL AND CONTROL (REF. P&WA JT8D MAINTENANCE MANUAL)........ DISTRIBUTION FUEL PUMP (Ref. P&WA JT8D Maintenance Manual).............................................. 73-11-1 PRESSURIZING AND DUMP VALVE (Ref. P&WA JT8D Maintenance Manual)..................................................................................................................... 73-12-1 FUEL NOZZLE AND SUPPORT ASSEMBLIES (Ref. P&WA JT8D Maintenance Manual)............................................................................................... 73-13-1 ENGINE FUEL DEICING SYSTEM ............................................................................ 73-14-0 Description and Operation Fuel (Deicing) Heater Fuel Filter Differential Pressure Switch Fuel Heat (Deicing Air) Valve Trouble Shooting Adjustment/Test Fuel Heat (Deicing Air) Valve................................................................................... 73-14-11 Removal/Installation Fuel Filter Differential Pressure Switch.................................................................... 73-14-21 Removal/Installation Adjustment/Test Fuel (Deicing) Heater............................................................................................... 73-14-31 Removal/Installation FUEL TUBES (Ref. P&WA JT8D Maintenance Manual)............................................ 73-15-1 CONTROLLING FUEL CONTROL SYSTEM (Ref. P&WA JT8D Maintenance Manual) ...................... 73-21-1 .................................................................................................................................... 73-21-2 FUEL CONTROL PRESSURE SENSING LINE AND MOISTURE TRAP (Ref P&WA JT8D Maintenance Manual)......................................................................... 73-21-3
506 Sep 20/81 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. Contents 73 Page 1
Subject Subject No. INDICATING FUEL FLOW INDICATING SYSTEM.......................................................................... *[1] 73-31-0
Description and Operation ....................................................................................... *[2] 73-31-01 Fuel Flow Indicator Fuel Flow Power Supply Fuel Flow Transmitter Trouble Shooting Fuel Flow Transmitter .............................................................................................. *[1] 73-31-11 Removal/Installation ............................................................................................. *[2] 73-31-12
Fuel Flow Power Supply .......................................................................................... 73-31-21 Removal/Installation *[1] BU ALL EXCEPT BU LN-SUA, LN-SUJ, LN-SUQ, LN-SUU, LN-SUV, LN-SUZ WA ALL EXCEPT WA N235WA THRU N259WA GJ ALL EXCEPT GJ B-2509 AND B-2510 *[2] BU LN-SUA, LN-SUJ, LN-SUQ, LN-SUU, LN-SUV, LN-SUZ WA N235WA THRU N259WA GJ B-2509 AND B-2510 504 Contents 73 Page 2 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. Oct 20/84
ENGINE FUEL HEATING (DE-ICING) SYSTEM - ADJUSTMENT/TEST 1. General
A. The engine fuel heating (deicing) system detects the presence of ice in the fuel and provides controlled heating of fuel to melt the ice. Fuel generally contains suspended water droplets and when the temperature of the fuel falls below the freezing point of water the droplets freeze. Ice eventually clogs the engine main fuel filter and restricts normal fuel flow to the engine. B. The engine fuel heating system for each engine consists of a fuel heater, fuel heat valve (P&W fuel deicing air shutoff valve), semiautomatic fuel heat switch, fuel heat valve open light, fuel filter differential pressure switch (P&W differential fluid pressure switch), fuel filter icing light, and the necessary plumbing. The fuel heater, fuel filter differential pressure switch, and fuel heat valve are mounted on the engine. The fuel heat switch, fuel heat valve open light, and fuel filter icing light area on the forward overhead panel. (See figure 1.) www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：737 AMM 飞机维护手册 发动机燃油和控制 ENGINE FUEL AND CONTRO
