32-33-00
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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
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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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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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