H.
System Protection and Fault Isolation
(1)
Fuel system protection and fault isolation consists of the Engine Indication and Crew Alerting System (EICAS) (AMM 31-41-00/001) and the FQIS processor functions. EICAS supplies status, caution, advisory faults or maintenance messages during airplane operation and for later recall by ground maintenance crews. The FQIS processor supplies protection and fault isolation only for the FQIS portion of the fuel system.
I.
Fuel Temperature Indication
(1)
A fuel temperature sensor in the right main fuel tank supplies temperature input to the fuel temperature indicator on the P5 panel.
J.
Fuel Pressure Indicating
(1)
A pressure switch connected to each fuel boost pump and fuel override pump supplies low pressure indication to each EICAS computer and to a low pressure light on the P5 panel (AMM 28-42-00/001).
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
28-00-00
ALL ú ú 01 Page 4 ú Jan 28/02
A
757 MAINTENANCE MANUAL
FUEL SYSTEM - MAINTENANCE PRACTICES
___________________________________
1. General_______
A. This procedure contains a task to examine the fuel boost pumps.
(1)
The inspection of the boost pumps is part of an inspection to find if there is fuel contamination in the fuel systems. To complete the inspection of the fuel systems for fuel contamination do a check on the engine equipment (Chapter 71), the engine fuel system (Chapter 73) and the APU (Chapter 49).
B.
This procedure also has tasks for inspection and replacement of the electrical bonding jumpers in the fuel system.
TASK 28-00-00-212-001
2. Examine the Fuel Boost Pumps____________________________
A. References
(1)
AMM 28-11-00/701, Fuel Tanks
(2)
AMM 28-22-03/401, Main Tank Fuel Boost Pump
B.
Access
(1)
Location Zones
133 Wing Center Section (Left)
134 Wing Center Section (Right)
531 Center Wing Tank (Left)
631 Center Wing Tank (Right)
C.
Procedure - Examine the Fuel Boost Pumps
S 012-002
(1)
Remove the pump motor and the impeller unit from the housing (AMM 28-22-03/401).
S 212-003
(2)
If you find corrosion in one of the pumps, examine all of the applicable tanks and the fuel system components as soon as possible.
中国航空网 www.aero.cn
航空翻译 www.aviation.cn
本文链接地址：757 AMM 飞机维护手册 燃油 CHAPTER 28 - FUEL 1(10)
