32-33-00
ALL ú ú 01 Page 102 ú Oct 10/88
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
FAULT ISOLATION/MAINT MANUAL
UPLOCK OPERATED SEQUENCE VALVE MECHANISM
UPLOCK MECHANISM
C FROM SHT 1
L OR R BODY GEAR WHEEL WELL
SEE E
UPLOCK MECHANISM
VALVE UPLOCK OPERATED SEQUENCE
ACTUATOR UPLOCK FROM SHT 1D UPLOCK MECHANISM
SEE G SHT 3 DOOR SAFETY VALVE
SEE F SHT 3 DOOR ACTUATOR
L OR R BODY GEAR WHEEL WELL E
Body Gear and Door Extension and Retraction - Component Location
Figure 102 (Sheet 2)
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32-33-00
ALL ú ú 01 Page 103 ú Oct 10/88
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 FAULT ISOLATION/MAINT MANUAL
CABLE DIFFERENTIAL (REF)
DOOR ACTUATOR BEAM
DOOR ACTUATOR SWIVEL JOINTS
DOOR ACTUATOR
DOOR SAFETY VALVE
DOOR ACTUATOR F FROM SHT 2 (REF) OUTPUT ROD DIFFERENTIAL FWD
DOOR SAFETY VALVE
G FROM SHT 2
BRACKET (REF)
DOOR OPERATED SEQUENCE VALVE
AND MECHANISM SEQUENCE VALVE DOOR OPERATED DOOR OPERATED SEQUENCE VALVE MECHANISM
SEE H
BODY GEAR DOOR (REF)
DOOR OPERATED SEQUENCE VALVE AND MECHANISM H Body Gear and Door Extension and Retraction - Component Location Figure 102 (Sheet 3)
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32-33-00
ALL ú ú 01 Page 104 ú Oct 10/88
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
BODY GEAR AND DOOR EXTENSION AND RETRACTION - ADJUSTMENT/TEST
_____________________________________________________________
TASK 32-33-00-715-071
1. Operational Test - Body Gear and Door Extension and Retraction______________________________________________________________
A. General
(1)
In the procedure, you can test the Body Gear and Door Extension and Retraction only or do a Main Gear and Door Extension and Retraction - Adjustment Test. If you wish to do the Main Gear and Door Extension and Retraction test at one time, proceed to "Main Gear and Main Gear Doors Extension and Retraction - System Test" in AMM 32-32-00/501.
(2)
The following test procedure provides an operational check of body gear extension and retraction to assure satisfactory performance. The test is not intended as a comprehensive system test to verify complete system rigging.
(3)
Hydraulic pressure for system No. 1 may be obtained from the air-driven pump with a capacity of 32 GPM or a hydraulic service cart (AMM 29-11-00/201).
B.
Equipment and Materials
(1)
Hydraulic service cart, 0 to 4000 psi with 15 micron absolute filtration capable of 30 gpm minimum using hydraulic fluid, fire resistant, per BMS 3-11 (AMM 20-30-03/201) (optional).
(2)
Stop watch
(3)
Main Gear Ground Lock - 6ME65B00161-1
(4)
Airplane jacks
C.
Prepare to Test Extension and Retraction
S 495-066
(1)
Install nose gear door locks (AMM 32-00-30/201).
S 215-052
(2)
Check that main and nose gear ground locks are installed (AMM 09-11-00/201).
S 215-053
(3)
Check that landing gear indicating and warning system is operating. Test as necessary (AMM 32-61-00/501).
(4)
Check that landing gear control handle is in OFF position.
S 215-055
(5)
Ground airplane from nose gear grounding lug and from unpainted structure in rear cargo door area to a single point ground (AMM 20-41-01/201).
(6)
Jack airplane for gear retraction (AMM 07-11-01/201).
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