32-42-11
ALL ú ú 01 Page 213 ú Feb 18/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL
C. Access
(1) Location Zone
117 Electrical & Electronics Compartment, LH
(P180 DC Power Distribution Panel)
136 Wing Landing Gear Well - Right (Aft Bulkhead, Wing Gear Wheel Well)
D. Prepare for the Removal
S 492-146
(1) Make sure the ground locks are installed in all landing gear (AMM 09-11-00/201).
S 492-147
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 CAN CAUSE INJURY TO PERSONS OR DAMGE TO EQUIPMENT.
(2)
Do this task: "Installation of the Door Locks on the Body Landing Gear" (AMM 32-00-30/201).
S 492-084
(3)
Make sure that wheel chocks are installed at all wheels.
S 842-085
(4)
Remove the pressure from hydraulic system No. 4 and the reservoir (AMM 29-11-00/201).
S 862-086
(5)
Release the parking brake.
S 862-148
(6)
Open this circuit breaker and attach a DO-NOT-CLOSE tag:
(a)
P180 DC Power Distribution Panel
1) 180J25, AUTOBRAKE
E.
Remove the Pressure Switch for the Solenoid Shutoff Valve or the Servo Control Valve
S 032-088
(1) Disconnect the electrical connector specified below from the
applicable pressure switch: ~.................................................................. | PRESSURE SWITCH | Solenoid Shutoff Valve | Servo Control Valve | | ................................................. | CONNECTOR NO. | DM439C | DM439D | 2..................….........................….....................1
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32-42-11
ALL ú ú 02 Page 214 ú Feb 18/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL
S 432-089
(2)
Put a cap on the electrical connector and the receptacle of the pressure switch.
S 022-090
(3)
Use the torque adapter to remove the pressure switch.
NOTE: To remove the pressure switch you must turn it
____
counterclockwise.
S 492-091
CAUTION: BE CAREFUL TO KEEP ALL CONTAMINATION OUT OF THE AUTOBRAKE
_______ PRESSURE-CONTROL MODULE. CONTAMINATION CAN CAUSE DAMAGE TO THE MODULE.
(4)
Put a plug in the open port of the module.
S 032-093
(5)
Remove the retainers and the O-rings from the pressure switch and discard the O-rings.
TASK 32-42-11-402-094
9. Install the Pressure Switch for the Solenoid Shutoff Valve or the Servo
_______________________________________________________________________ Control Valve on the Autobrake Pressure-Control Module (Fig. 201)
______________________________________________________
A. Special Tools and Equipment
(1)
77144-T2 - Torque Adapter
Abex Corporation, Aerospace Division
3151 West 5th Street
Oxnard, CA 93030
B.
Consumable Materials
(1)
D00054 Hydraulic System Lubricant - MCS 352
C.
References
(1)
AMM 09-11-00/201, Towing
(2)
AMM 29-11-00/201, Main Hydrualic Supply System
(3)
AMM 32-00-30/201, Landing Gear Door Locks
(4)
AMM 32-42-00/501, Brake Control System
(5)
AIPC 32-42-11-01
(6)
SSM 32-41-01
(7)
WDM 32-41-31
D.
Access
(1)
Location Zones
117 Electrical & Electronics Compartment, LH
(P180 DC Power Distribution Panel)
740 Wing Landing Gear - Right and Doors (Aft Bulkhead, Wing Gear Wheel Well)
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