757 最低设备清单 Minimum Equipment List (MEL) 2(70)

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A. APU INLET DR ACT circuit breaker on E6 rack in aft equipment center remains open and collared, or is pulled and collared if Steps 1 and 2 were not accomplished.
 
OPERATIONS (O)
For dispatch with APU intake door open, apply AFM performance adjustments for APU ON. Average fuel consumption for APU operation is 200 lbs (90 kg) per hour.
 
REPAIR INTERVAL C 1 NUMBER INSTALLED
ITEM   0 NUMBER REQUIRED FOR DISPATCH
    REMARKS OR EXCEPTIONS
May be inoperative and APU used, provided a qualified operator remains in the vicinity of the flight deck APU control.
49-61-1 APU External Control
System    

EICAS STATUS MESSAGES
None
PLACARD
As appropriate
MAINTENANCE (M)
NOTE: The system operates when an APU fire is detected while the airplane is on the ground, and both engines are OFF.
1. Verify the APU fire extinguishing system operates normally as follows:
A. On the flight deck from the Aft Electronics panel (P8) perform a FIRE/OVHT TEST by pushing the ENG/APU/CARGO switch. The fire bell will ring intermittently. Observe the following lights illuminate:
 Discrete FIRE warning light.
 Fuel control switches.
 L and R ENG OVHT.
 LEFT, RIGHT, and APU fire switches.
 FWD and AFT cargo fire.
B. On the flight deck from the Accessory Panel, push the SQUIB TEST switch. Observe the APU squib light illuminates green.
 
NUMBER INSTALLED

  NUMBER REQUIRED FOR DISPATCH
1 0 REMARKS OR EXCEPTIONS

 
EICAS STATUS MESSAGES
None
PLACARD
Light - LIGHT INOP
 
EICAS STATUS MESSAGES
None
PLACARD
Light - LIGHT INOP
OPERATIONS (O)
APU Shutdown:
 Position APU VALVE switch to OFF. Check to see that APU VALVE light does not come on.
 Wait 120 seconds for APU cooldown.
 Turn APU selector switch to OFF.
 Wait 20 seconds, observe APU FAULT light momentarily illuminates to indicate APU fuel valve is in transit to closed.
APU Startup:
Monitor APU RPM and EGT on EICAS, load APU when APU RPM is 95% or greater.
 
NUMBER INSTALLED

  NUMBER REQUIRED FOR DISPATCH
1 0 REMARKS OR EXCEPTIONS
 
EICAS STATUS MESSAGES
None
PLACARD
As appropriate
 
NUMBER INSTALLED

  NUMBER REQUIRED FOR DISPATCH
1 0 REMARKS OR EXCEPTIONS
 
EICAS STATUS MESSAGES
None
PLACARD
As appropriate
 

NUMBER INSTALLED
1 NUMBER REQUIRED FOR DISPATCH
REMARKS OR EXCEPTIONS
0 May be inoperative provided APU is considered inoperative.
1 0 (M) May be inoperative provided oil quantity is verified by alternate means.
　
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