B.
Control
(1)
In order for the APU DC PUMPS to operate, the subsequent circuit breakers and switches must be in these positions:
(a)
APU DC PUMP, on overhead circuit breaker panel P11, is closed.
(b)
DC PUMP CONT, on the P11 panel, is closed.
(c)
L FWD FUEL BOOST PUMP, on the main power distribution panel P6, is closed.
(d)
Electrical power is supplied (AMM 24-22-00/201).
(e)
The APU control selector, on the pilot's overhead panel P5, is in the ON position.
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28-25-00
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A
757 FAULT ISOLATION/MAINT MANUAL
APU FUEL-FEED SYSTEM
COMPONENT FIG. 102 SHT QTY ACCESS/AREA REFERENCE
ACTUATOR - APU FUEL SHUTOFF VALVE, V96 1 1 MAIN GEAR DOORS 28-25-11
ARRESTOR - APU FLAME 4 2 MAIN GEAR DOORS 28-25-07
CIRCUIT BREAKERS 1 FLT COMPT, P6
APU FUEL VALVE, C1063 1 6E3 *
L FWD FUEL BOOST PUMP, C372 1 6H23 *
CIRCUIT BREAKERS 1 FLT COMPT, P11
APU DC PUMP, C1058 1 11C33 *
APU FUEL DISAGREE ENBL, C4175 CIRCUIT BREAKERS DC PUMP CONT, C1052 1 11D35 11D32 119BL, MAIN EQUIP CTR, P37 * *
APU GND SERVICE PWR SENSE, C4174 1 *
LINE - APU FUEL AND SHROUD 3 AIRPLANE FUSELAGE 28-25-05
PUMP - APU DC FUEL, M336 DC FUEL PUMP CONTROL, K191 GND SERVICE SENSE RELAY, K10159 L FWD PUMP START, K512 APU FUEL CONTROL, K175 APU SOV DISAGREE, K10160 APU SOV DISAGREE ENABLE, K10162 APU FUEL PUMP TRANSFER, K505 RELAYS - (REF 31-01-70, FIG. 101) RELAYS - (REF 31-01-86, FIG. 101) 2 1 134AZ, MAIN GEAR DOORS 28-25-01
SWITCH - APU DC FUEL PUMP PRESSURE, S74 2 1 MAIN GEAR DOORS 28-25-03
SWITCH - APU FUEL SHUTOFF PRESSURE, S10189 2 1 MAIN GEAR DOORS *
VALVE - APU CHECK 2 1 134AZ 28-25-06
VALVE - APU FUEL SHUTOFF, V96 1 1 134AZ 28-25-02
VALVE - APU SUMP DRAIN 4 1 MAIN GEAR DOORS 28-25-09
* SEE THE WDM EQUIPMENT LIST
APU Fuel-Feed System - Component Index
Figure 101
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú 中國航空網 m.k6050.com 航空翻譯 www.aviation.cn 本文鏈接地址：757 AMM 飛機維護手冊 燃油 CHAPTER 28 - FUEL 4(13)
