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32-42-11
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A
747-400 MAINTENANCE MANUAL
AUTOBRAKE SHUTTLE VALVE - MAINTENANCE PRACTICES
_______________________________________________
1. General_______
A. This procedure contains five tasks. The first and second tasks remove and install the shuttle valve, a component of the autobrake shuttle valve. The third and fourth tasks remove and install the brake metered pressure switch, also a component of the autobrake shuttle valve. The fifth task is an operational test of the autobrake shuttle valve.
TASK 32-42-12-002-058
2. Shuttle Valve - Removal (Fig. 201)_______________________
A. References
(1)
AMM 09-11-00/201, Towing
(2)
AMM 24-22-00/201, Manual Control
(3)
AMM 29-11-00/201, Main Hydraulic Supply System
(4)
AMM 32-00-30/201, Landing Gear Door Locks
(5)
IPC 32-42-12-01
(6)
SSM 32-41-01
(7)
WDM 32-41-31
B.
Access
(1)
Location Zones 118 Electrical & Electronics Compartment, RH (P180 DC Power Distribution Panel) 135 Wing Landing Gear Well - Left (Aft Bulkhead, Wing Gear Wheel Well)
136 Wing Landing Gear Well - Right (Aft Bulkhead, Wing Gear Wheel Well)
C. Prepare for the Removal
S 492-143
(1)
Make sure the ground locks are installed in all landing gear (AMM 09-11-00/201).
(2)
Make sure the wheel chocks are installed.
S 492-144
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747-400 MAINTENANCE MANUAL
S 842-061
(3)
If it is necessary, release the parking brake. S 492-062
CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
(4)
Do this task: "Installation of the Door Locks on the Wing Landing Gear" (AMM 32-00-30/201).
S 492-063
(5)
Do this task: "Installation of the Door Locks on the Body Landing Gear" (AMM 32-00-30/201).
S 862-145
(6)
Supply electrical power (AMM 24-22-00/201).
S 862-146
(7)
Remove the pressure from hydraulic systems No. 1, 2, and 4 (AMM 29-11-00/201).
S 842-066
(8)
Do these steps to remove the hydraulic fluid from the hydraulic brake accumulator:
(a)
Look at the pressure indication of the HYD BRAKE PRESS gage on the Captain's Main Instrument Panel, P1.
(b)
Slowly push one set of brake pedals to the limit of travel, hold momentarily, and then release. Do this step 10 times.
(c)
Make sure the pressure indication of the HYD BRAKE PRESS gage decreases during manual brake operation.
(d)
After the 10 cycles of manual brake operation, make sure the measurement on the HYD BRAKE PRESS gage does not decrease in pressure.
WARNING:_______ YOU MUST CAREFULLY DO THE STEPS IN THE TASK BELOW TO INSTALL
THE DOOR LOCKS ON THE LANDING GEAR DOORS. THE DOORS CAN CLOSE
QUICKLY IF YOU DO NOT INSTALL THE DOOR LOCKS CORRECTLY. THIS
S 862-067
(9)
Open this circuit breaker and attach a DO-NOT-CLOSE tag:
(a)
P180 DC Power Distribution Panel 1) 180J25 AUTOBRAKE
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL
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本文链接地址：747-400 AMM 飞机维护手册 起落架 LANDING GEAR 7(81)
