C.
Prepare for the Removal
S 494-010
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 (Ref 09-11-00/201).
S 494-003
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 OR DAMAGE TO EQUIPMENT.
(2) Do this task: "Wing Landing Gear Door Lock Installation" (Ref 32-00-30/201).
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747-400 MAINTENANCE MANUAL
S 494-011
(3)
Do this task: "Body Landing Gear Door Lock Installation" (Ref 32-00-30/201).
D.
Remove the Actuator Beam.
S 024-004
(1) Remove the actuator beam (Fig. 401):
CAUTION:_______HOLD THE BOLT WHEN YOU LOOSEN IT. IF YOU PERMIT THE BOLT TO TURN, IT CAN CAUSE DAMAGE TO THE CLEVIS LOCKING DEVICE.
(a)
Hold the door actuator and remove the bolt (4).
(b)
Hold the actuator beam and remove the bolt (5) to disconnect the door actuator rod.
(c)
Remove the bolts (2 and 3) and remove the door actuator beam.
TASK 32-32-28-404-005
3. Wing Landing Gear Door Actuator Beam Installation_________________________________________________
A. References
(1)
32-00-30/201, Landing Gear Door Locks
(2)
32-12-00/501, Wing Gear Doors
(3)
IPC 32-32-27 Fig. 1, IPC 32-32-28 Fig. 1
B.
Access
(1)
Location Zone
735 Wing Landing Gear, LH
745 Wing Landing Gear, RH
C.
Procedure
S 424-006
(1)
Install the door actuator beam (Fig. 401):
(a)
Put the beam (1) in the position with the fittings adjacent to the clevis fittings on the structure.
(b)
Install the bolt (2) with the head end forward and tighten the nut to 1100-3300 pound-inches.
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A 747-400 MAINTENANCE MANUAL
SEE B
1. DOOR ACTUATOR BEAM
SEE A
DOOR ACTUATOR
SEE C
WASHER
STRUCTURE
NUT FWD
A
BUSHING
(2 LOCATIONS)
2.
BOLT
3.
BOLT
WASHERWASHER
SELF-LOCKING
BUSHING
NUT
NUTWASHER 4. BOLT
B
NUT ACTUATOR (ROD END) WASHER
THICK BUSHING
NYLON WASHER
DOOR ACTUATOR ROD
5. BOLT
THIN NYLON WASHER
CSR WASHER
C
Wing Landing Gear Door Actuator Beam Assembly Installation
Figure 401
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747-400
MAINTENANCE MANUAL
(c)
Install the bolt (3) with the head end aft and tighten the nut to 240-600 pound-inches.
(d)
Install the cotter pins in each bolt.
(e)
If you cannot install the cotter pin or you can loosen the nut below the minimum torque after you install the cotter pin, do these steps: 1) Change the aft nut with the forward nut. 2) Install washers adjacent to the nuts.
