S 862-005
(4)
Do this task to release the pressure for the applicable hydraulic system: "Remove Hydraulic Power" (AMM 29-11-00/201):
(a)
For the left outboard elevator PCP; Do these steps: 1) Release the pressure in the hydraulic system No. 1. 2) Move the control column in the two directions to remove all
the remaining pressure in the PCP 3) Release the pressure in the hydraulic system No. 2.
(b)
For the right outboard elevator PCP; Do these steps: 1) Release the pressure in the hydraulic system No. 4. 2) Move the control column in the two directions to remove all
the remaining pressure in the PCP 3) Release the pressure in the hydraulic system No. 3.
S 862-006
(5)
Set all FLT CONTROL HYD POWER TAIL switches on the P461 Pilots' Overhead Maintenance Panel in SHUTOFF.
S 862-007
(6)
Open these circuit breakers and attach DO-NOT-CLOSE tags:
(a)
P7, Overhead Circuit Breaker Panel
1) 7E7, STAB TRIM L S/O VLV
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747-400 MAINTENANCE MANUAL
2) 7E20, STAB TRIM R S/O VLV
(b) P180, DC Power Distribution Panel
1) 180H7, ELEV/RUD VLV SYS 2
2) 180E8, ELEV/RUD VLV SYS 1
3) 180H22, ELEV/RUD VLV SYS 4
4) 180E23, ELEV/RUD VLV SYS 3
S 862-008
(7)
If the electrical power is not necessary, do this task: "Remove Electrical Power" (AMM 24-22-00/201).
S 012-009
(8)
Remove the access panels 334LB (left) or 344LB (right), 336DB (left) or 346DB (right) if it is necessary (AMM 06-09-06/201).
S 012-010
(9)
Remove the section of stabilizer trailing edge beam below the outboard elevator PCP.
S 032-011
(10)
Remove the bolt (13) to disconnect the input control rod (2) from the PCP summing lever (5).
NOTE: Do not change the adjustment of the input control rod while
____
you disconnect it.
S 492-013
(11)
Install the outboard elevator holding tool (Fig. 201):
(a)
Manually move the outboard elevator to the full up position.
(b)
Move the summing lever (5) to follow the outboard elevator movement.
(c)
Hold the outboard elevator in the full up position.
(d)
Install the outboard elevator holding tool.
E.
Remove the Outboard Elevator PCP
S 032-014
(1) Disconnect the hydraulic lines H1, and H2 at the outboard elevator PCP (1).
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747-400 MAINTENANCE MANUAL
S 032-015
(2)
Connect the hydraulic lines and the cap ports.
S 492-016
(3)
Install the handling cradle on the outboard elevator PCP (Fig. 201).
S 492-017
(4)
Lift the weight of the outboard elevator PCP.
NOTE: Each outboard elevator PCP weighs approximately 65 pounds.
____
S 022-018
(5)
Remove the outboard elevator PCP:
(a)
Use the spanner wrench to remove the bolt (11).
(b)
Remove and keep the bushings (6) from the inboard lug of the elevator attachment fitting.
(c)
Use the torque wrench adapter to remove the trunnion bolts (3).
(d)
Lower the handling cradle and the outboard elevator PCP.
(e)
Move and turn the aft end of the handling cradle down until it is clear of the structure.
(f)
Remove the outboard elevator PCP (1) from the handling cradle.
TASK 27-31-08-402-019
3. Outboard Elevator Power Control Package (PCP) Installation (Fig. 202)__________________________________________________________
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本文链接地址：747-400 AMM 飞机维护手册 飞行操纵 FLIGHT CONTROLS 3(73)
