B.
References
(1)
AMM 29-11-00/201, Pressurize/Depressurize Main Hydraulic System
(2)
AMM 32-00-15/201, Landing Gear Door Locks
(3)
AMM 32-00-20/201, Landing Gear Downlocks
C.
Access
(1)
Location Zone
143 MLG Wheel Well (Left)
144 MLG Wheel Well (Right)
211 Control Cabin (Left)
212 Control Cabin (Right)
732 MLG Body Doors (Left)
742 MLG Body Doors (Right)
Main Landing Gear Door Safety Valve Installation
Figure 401
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757
MAINTENANCE MANUAL
LOCK EQUIPMENT
FOR THE MLG DOOR
ACTUATOR - B32012-32
SEE B
DOOR SAFETY
VALVE MLG DOOR LOCK
RELEASE MECHANISM
SEE A
DOOR RELEASE INTERLOCK ACTUATOR
DOOR ACTUATOR
INPUT CRANK FOR THE DOOR SAFTY VALVE
LOCK PIN
DOOR LOCK RELEASE ACTUATOR
LOCK FOR THE FWD
MLG DOOR ACTUATOR
MLG DOOR LOCK RELEASE MECHANISM
LOCK EQUIPMENT CLAMP FOR THE
A
MLG DOOR ACTUATOR
LOCK EQUIPMENT FOR THE MLG DOOR ACTUATOR - B32012-32
B
Main Landing Gear Door Actuator Lock Equipment Installation
Figure 402
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757 MAINTENANCE MANUAL
D. Prepare for the Removal
S 494-002
(1) Make sure the downlocks are installed on the nose and main landing gear (AMM 32-00-20/201).
S 494-003
WARNING: USE THE PROCEDURE IN AMM 32-00-15/201 TO INSTALL THE DOOR
_______ LOCKS. THE DOORS OPEN AND CLOSE QUICKLY AND CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
(2)
Open the doors for the landing gear and install the door locks (AMM 32-00-15/201).
S 864-004
(3)
Open this circuit breaker on the main power distribution panel, P6-1, and attach a DO-NOT-CLOSE tag:
(a)
6F6, LANDING GEAR ALTN EXT MOTOR
S 864-005
(4)
Remove the pressure from the left hydraulic system and hydraulic reservoir (AMM 29-11-00/201).
E.
Procedure to Remove the Valve
S 034-006
(1)
Disconnect the hydraulic lines from the valve.
S 494-007
(2)
Install plugs in the lines and fittings.
S 094-008
(3)
Remove the lockpin from the top half of the lock equipment clamp for the door actuator on the main landing gear (Fig. 402).
(4)
Remove the equipment clamp from the safety valve.
S 094-009
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757 MAINTENANCE MANUAL
S 034-010
(5)
Remove the bolt to disconnect the top end of the rod from the lever on the safety valve (Detail A).
S 024-011
(6)
Remove the bolts that attach the valve to the structure, and remove the valve.
TASK 32-35-05-404-012
3. Install the Door Safety Valve for the Main Landing Gear (Fig. 401, 402)_______________________________________________________
A. Equipment
(1)
Door Actuator Lock Equipment, MLG-B32012-32
B.
References
(1)
AMM 12-12-01/301, Hydraulic Systems
(2)
AMM 24-22-00/201, Electrical Power - Control
(3)
AMM 29-11-00/201, Pressurize/Depressurize Main Hydraulic System
(4)
AMM 32-00-15/201, Landing Gear Door Locks
(5)
AMM 32-35-00/501, Landing Gear Alternate Extension
C.
Access
(1)
Location Zone
143 MLG Wheel Well (Left)
144 MLG Wheel Well (Right)
211 Control Cabin (Left)
212 Control Cabin (Right)
732 MLG Body Doors (Left)
742 MLG Body Doors (Right)
D.
Procedure to Install the Valve
S 424-013
(1)
Install the bolts and washers to attach the valve to the support. Put the countersunk washer behind the head of the bolt with the countersink to the head (Detail A).
S 434-014
(2)
Install the bolt, washers, bushing, and nut to connect the rod to the lever on the side of the valve. Put the plain washer behind the nut. Put the countersunk washer behind the head of the bolt with the countersink to the head.
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