(2)
The manual movement of the aftflaps
(3)
An adjustment of the actuator rod length
(4)
An adjustment of the bulb seal
(5)
The retraction of the inboard flaps.
TASK 27-51-39-004-001
2. Midflap Crank Removal_____________________
A. References
(1)
AMM 29-11-00/201, Main Hydraulic Supply System
(2)
AIPC 27-51-39 Fig. 1
(3)
AIPC 27-51-39 Fig. 4
B.
Access
(1)
Location Zone 563 Outboard Flap Track Fairing, Inboard Flap, LH (Track No. 3) 561 Inboard Flap Track Fairing, Inboard Flap, LH (Track No. 4) 661 Inboard Flap Track Fairing, Inboard Flap, RH (Track No. 5)
663 Outboard Flap Track Fairing, Inboard Flap, RH (Track No. 6)
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A
747-400 MAINTENANCE MANUAL
C. Procedure
S 864-002
(1) Do this task to pressurize hydraulic system No. 1: "Hydraulic System Pressurization" (AMM 29-11-00/201).
S 864-119
WARNING: MAKE SURE THAT PERSONS AND EQUIPMENT ARE CLEAR OF THE LE AND TE
_______ FLAPS AND FLAP DRIVE MECHANISMS BEFORE YOU MOVE THE FLAP CONTROL LEVER. WITH HYDRAULIC POWER REMOVED, THE FLAPS WILL MOVE AUTOMATICALLY BY ELECTRICAL POWER WHEN YOU MOVE THE FLAP CONTROL LEVER.
(2)
Put the flap control lever in the 30-unit detent to extend the inboard flaps.
S 864-004
(3)
Do this task to depressurize hydraulic system No. 1: "Hydraulic System Depressurization" (AMM 29-11-00/201).
S 434-005
(4)
Attach the aftflap to the midflap.
S 024-006
(5)
Remove the midflap crank (4) from the midflap fitting (6)
(Section A-A, Fig. 401):
(a)
Remove the three bolts (15) and washers (14) that attach the retainer (12) and the shim (13).
(b)
Remove the retainer and the shim.
(c)
Remove the midflap crank (4) from the midflap fitting (6).
S 034-007
(6)
Disconnect the pushrod (1) from the midflap crank:
(a)
Remove the bolt (8), washers (9 and 10), and nut (11).
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MAINTENANCE MANUAL
SEE A SEE C
SEE B
A
MIDFLAP A 1. PUSHROD
B 4. MIDFLAP CRANK A
AFTFLAP B SEE E
3. AFTFLAP FITTING SEE G B 2. ACTUATOR ROD
Inboard Aftflap Drive Mechanism Assembly
Figure 401 (Sheet 1)
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MAINTENANCE MANUAL
5. BOLT
B-B
Inboard Aftflap Drive Mechanism Installation
Figure 401 (Sheet 2)
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18. GENEVA CAM
CARRIAGE
F
SEE F E E C F H 19. AFT ROLLER SUPPORT
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