757 最低设备清单 Minimum Equipment List (MEL) 2(43)

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 Gain access to valve, located on forward bulkhead of right main gear wheel well.
 Check that the override lever on parking brake valve is at POS 1 (full open).
B. On the antiskid/autobrake control unit in the aft equipment center E6. perform the following:
 Press the BIT switch to check for the absence of faults until the unit display reads TEST END.
 Confirm that no faults are displayed.
 Press the RESET switch to clear memory.
C. Restore airplane to its required configuration.
2. For antiskid inoperative, refer to Maintenance procedure in Item 32-42-1.
OPERATIONS (O)
1. For antiskid system inoperative (two or more channels inoperative):
 Takeoff and landing performance must be in compliance with Runway Performance Software (Finscap) for takeoff and with OM-B for landing for antiskid inoperative.
 Select AUTO BRAKES OFF.
 When stopping after landing and for refused takeoffs:
 
 Close thrust levers and raise speedbrakes.
 Initiate wheel braking using light pedal pressure and increase as ground speed decreases.
 
REPAIR INTERVAL
ITEM
32-42-4 Autobrake System C
C
C
 

 
EICAS STATUS MESSAGES
None
PLACARD
Auto brakes selector - AUTO BRAKES INOP
MAINTENANCE (M)
To verify that the autobrake solenoid valve is closed, do the following procedure:
 Apply electrical power to the airplane.
 Chock the wheels.
 Release the parking brake.
 Retard both thrust levers.
 Place the AUTO BRAKES selector switch to OFF.
 Pressurize the right hydraulic system.
 If the AUTO BRAKES light is not illuminated, the autobrake solenoid valve is closed. The airplane can
be dispatched per the MEL without further maintenance action.
 
8. If the AUTO BRAKES light remains illuminated:
 Depressurize the right and left hydraulic systems.
 Pump the brake pedals until the brake accumulator pressure gage on the First Officer's panel will reduce no further (approximately 1300 psi).
 If the AUTO BRAKES light remains illuminated, the autobrake solenoid valve is closed (the autobrake solenoid valve pressure switch or indication system has a fault). The airplane can be dispatched per the MEL without further maintenance action.
 If the AUTO BRAKES light is not illuminated, the autobrake solenoid valve has failed open and the autobrake valve module must be deactivated per step 2.
To deactivate the autobrake module, do the following procedure:
1. Depressurize the right and left hydraulic systems.
2. Depressurize the right hydraulic system reservoir (AMM 29-11-00).
3. Pump the brake pedals until the brake accumulator pressure gage on the First Officer's panel will reduce no further (approximately 1300 psi)
　
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