S 864-045 WARNING: MAKE SURE THAT PERSONS AND EQUIPMENT ARE CLEAR OF ALL CONTROL
_______ SURFACES BEFORE YOU SUPPLY HYDRAULIC POWER. AILERONS, RUDDERS, ELEVATORS, FLAPS, SPOILERS, LANDING GEAR, AND THRUST REVERSERS CAN MOVE QUICKLY WHEN YOU SUPPLY HYDRAULIC POWER. THIS CAN CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
 (11)
 Pressurize hydraulic system No. 4 (AMM 29-11-00/201). S 714-012

 (12)
 Do a check of the valve: CAUTION: MAKE SURE ALL PERSONS AND EQUIPMENT ARE AWAY FROM THE DOOR

_______ OPERATION AREA. A FAST MOVEMENT OF THE DOORS CAN CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
 (a)  Move the ground release handle to the DOORS OPEN and DOORS CLOSED position two times.
 NOTE: This will open and close the doors.
____
 (b)  
Move the ground release handle to the DOORS OPEN position.

 (c)  
Make sure there are no leaks at the valve.

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747-400 MAINTENANCE MANUAL
 (d)  
Push the button for the lever lock solenoid for the control handle and hold it.

 (e)  
Move the control handle to the UP position.

 (f)  
Make sure there are no leaks at the valve.

 (g)  
Move the control handle to the DN position.

 S 864-046
 WARNING:  MAKE SURE THAT PERSONS AND EQUIPMENT ARE CLEAR OF ALL CONTROL
_______ SURFACES BEFORE YOU SUPPLY HYDRAULIC POWER. AILERONS, RUDDERS, ELEVATORS, FLAPS, SPOILERS, LANDING GEAR, AND THRUST REVERSERS CAN MOVE QUICKLY WHEN YOU SUPPLY HYDRAULIC POWER. THIS CAN CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
 (13) Pressurize hydraulic system No. 1 (AMM 29-11-00/201).
 S 864-014
 CAUTION: MAKE SURE ALL PERSONS AND EQUIPMENT ARE AWAY FROM THE DOOR
_______ OPERATION AREA. A FAST MOVEMENT OF THE DOORS CAN CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
 (14)
 Move the ground release handle for the doors to the DOORS CLOSED position.

 S 864-015

 (15)
 Remove hydraulic pressure from systems No. 1 and 4 if it is not necessary (AMM 29-11-00/201).

 TASK 32-32-06-004-016
 4. Wing Landing Gear Uplock-Operated Sequence Valve Mechanism Removal
__________________________________________________________________
 A. References
 (1)  
AMM 09-11-00/201, Towing

 (2)  
AMM 29-11-00/201, Main Hydraulic Supply System

 (3)  
AMM 32-00-30/201, Landing Gear Door Locks

 (4)  
AIPC 32-32-06 Fig. 1

 B.
Access

 (1)  
Location Zone
 135 Wing Landing Gear Well, LH
 136 Wing Landing Gear Well, RH

 C.
Prepare for the Removal

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 S 494-047
 WARNING: YOU MUST CAREFULLY INSTALL THE GROUND LOCKS IN ALL LANDING
_______ GEAR. AN ACCIDENTAL RETRACTION OF THE LANDING GEAR CAN CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
 (1) Install the ground locks in all landing gear (AMM 09-11-00/201).
 S 494-034
 WARNING:  YOU MUST CAREFULLY DO THE STEPS IN THE TASKS 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 AND DAMAGE TO EQUIPMENT.
 (2)  
Do this task: "Wing Landing Gear Door Lock Installation" (AMM 32-00-30/201).

 S 494-035

 (3)  
Do this task: "Body Landing Gear Door Lock Installation" (AMM 32-00-30/201).

 S 864-019

 (4)  
Make sure there is no pressure in hydraulic system No. 4 (AMM 29-11-00/201).

 D.
Remove the Valve Mechanism.

 S 024-020
　
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