B33341
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28-42-00
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
FAULT ISOLATION/MAINT MANUAL
PRESSURE SWITCHES FOR PRESSURE SWITCH FORTHE OVERRIDE/JETTISON THE OVERRIDE/JETTISONPUMPS (NO. 2 AND PUMP, S239 OR S2403 MAIN TANKS)
(NO. 2 OR 3 MAIN SEE E TANK AFT)
PRESSURE SWITCHES FOR
OVERRIDE/JETTISON PUMPS
(LEFT AND RIGHT
CENTER WING TANKS)
OVERRIDE/JETTISON PUMPSEE F (NO. 2 OR 3 MAIN TANK AFT) (REF)
PRESSURE SWITCH FOR THE OVERRIDE/JETTISON PUMP, S238 OR S241 (NO. 2 OR 3 MAIN TANK FORWARD)
REAR SPAR (REF) OVERRIDE/JETTISON PUMP (NO. 2 OR 3 MAIN FWDTANK FORWARD) (REF)
INBD ____THE LEFT SIDE IS SHOWN,
NOTE: THE RIGHT SIDE IS OPPOSITE.
PRESSURE SWITCHES FOR THE OVERRIDE/JETTISON PUMPS (MAIN TANKS)
E
ACTUATOR FOR THE FUEL JETTISON TRANSFER VALVE (REF)
PRESSURE SWITCH FOR THE
OVERRIDE/JETTISON PUMP
OVERRIDE/ IN THE CENTER WING TANK,
JETTISON S66 OR S68 (LEFT OR RIGHT)
PUMP (LEFT OR
RIGHT CENTER
REAR SPAR
WING TANK)
(REF)
(REF)
PRESSURE SWITCHES FOR THE OVERRIDE/JETTISON PUMPS (CENTER WING TANK)
F
Pressure Indication System - Component Location
Figure 102 (Sheet 3)
B33460
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28-42-00
ALL ú ú 01 Page 104 ú Feb 10/97
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 FAULT ISOLATION/MAINT MANUAL
PRESSURE SWITCH FOR THE APU BOOST PUMP
SEE G
PRESSURE SWITCH FOR THE CONTROL OF THE APU BOOST PUMP
SEE G
WING REAR SPAR (REF)
PRESSURE SWITCH FOR THE NO. 2 AFT MAIN BOOST PUMP (REF)
APU
SHUTOFF
VALVE
(REF)
PRESSURE SWITCH FOR THE APU BOOST PUMP, S435
MAIN TANK NO. 2
AFT BOOST PUMP
(REF)
APU FUEL BOOST
FWD INBD PUMP (REF)
PRESSURE SWITCH
FOR THE CONTROL OF THE APU BOOST PUMP, S548
PRESSURE SWITCHES FOR THE APU BOOST PUMPS G
Pressure Indication System - Component Location
Figure 102 (Sheet 4)
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
28-42-00
ALL ú
ú 06 Page 105
ú Feb 10/94
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
C19032
A
747-400 MAINTENANCE MANUAL
FUEL PRESSURE INDICATING SYSTEMS - ADJUSTMENT/TEST
__________________________________________________
1. General_______
A. This procedure contains an operational test of the fuel pressure switches and the pressure indicator lights on the fuel management control module.
TASK 28-42-00-715-018
2. Fuel Override/Jettison Pump Low Pressure Indicating System Test_______________________________________________________________
A. General
(1)
This task can be done with any quantity of fuel in the center wing tank and inboard main tanks.
(a)
If this test is done without fuel or low fuel (fuel inlets above the level of the fuel) the circuit breakers for the override/jettison pump power must be opened.
B.
References
(1)
AMM 24-22-00/201, Manual Control
(2)
AMM 28-22-16/401, Fuel System Card File
(3)
AMM 31-61-00/501, Integrated Display Systems (IDS)
C.
Access
(1) 中国航空网 www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：747-400 AMM 飞机维护手册 燃油 FUEL 4(146)
