28-25-00
 ALL  ú ú 09 Page 7 ú Mar 20/91

A

757
MAINTENANCE MANUAL

FORWARD SEE A D APU FLAME ARRESTOR
SEE E SEE B
SEE C
CHECK VALVE APU FUEL  ARRESTOR FLAME APU  FLANGE ARRESTOR FLAME 
FWD  FUEL LINE 
A 
LINE DRAIN FUEL 
FWD
B  INBD 
Figure 4 (Sheet 1) APU Fuel Feed System Components 

EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 28-25-00
 ALL  ú ú 06 Page 8 ú Mar 20/91

A
757
MAINTENANCE MANUAL

ARRESTOR APU FLAME BSEE  REAR SPAR DRY SIDE DC FUEL PUMP 
ELECTRICAL CONNECTOR PRESSURE SWITCH DC FUEL PUMP 
DRAIN VALVE APU SUMP 
D 
C  DRY SIDE REAR SPAR 
CONNECTOR ELECTRICAL 
SWITCH PRESSURE SHUTOFF APU FUEL PUMP 
BOOST PUMP LEFT AFT MAIN  FWD  INBD 
E 
APU Fuel Feed System Components Figure 4 (Sheet 2) 

EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 28-25-00
 ALL  ú ú 01 Page 9 ú Jan 28/02

A
757
MAINTENANCE MANUAL

FIRE
28V DC
HOT BAT.
BUS FUEL S/O

NORMAL
VLV - APU
APU FIRE

4A
115V AC
A 5A
GND SVCE
BUS
A MD&T
6
A
S3 CLOSED
35
L FWD FUEL
BOOST PUMP
APU FAULT LIGHT

CLOSE
3
P6
S1
APU SHUTOFF VALVE
4 M
28V DCDISAGREE RELAY
BAT. BUS
FUEL DISAGREE

OPEN
S2
2
6
APU SHUTOFF
ENBL - APUVALVE DISAGREE
OPENED
ENABLE RELAY
APU OFF
28V DC
S4
BAT. BUS
DC FUEL

APU SHUTOFF VALVE
2
BOOST PUMP
CONT

APU SHUTOFF VALVE
28V DC
BAT. BUS
DC FUEL

1 2
APU ON
BOOST PUMP
APU

APU FUEL CONTROL
RELAY
P11

GROUND SERVICESENSE RELAY
A
AIR
T
D

ON
A
GROUND
　
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(10)