(a)
An extension of the flaps
(b)
The installation of the support equipment
(c)
The removal of the ball screw.
(2)
The installation has these parts:
(a)
The installation of the support equipment
(b)
A check that the ball screw and the universal joint are aligned
(c)
The installation of the ball screw
(d)
An adjustment of the ball screw.
TASK 27-51-41-004-001
2. Ball Screw Removal
__________________
A. Special Tools and Equipment
(1)
2MIT65B81117-1 Ball and Screw Support Tool
(2)
24ME65B00116 Inboard TE Flap Lock
(3)
23ME65B00116 Outboard TE Flap Lock
B.
References
(1)
AMM 24-22-00/201, Manual Control
(2)
AMM 29-11-00/201, Main Hydraulic Supply System
C.
Access
(1)
Location Zone 567 Outboard Flap Track Fairing, Outboard Flap, LH, (Track No. 1) 565 Inboard Flap Track Fairing, Outboard Flap, LH, (Track No. 2) 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) 665 Inboard Flap Track Fairing, Outboard Flap, RH, (Track No. 7)
667 Outboard Flap Track Fairing, Outboard Flap, RH, (Track No. 8)
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27-51-41
ALL ú ú 01 Page 401 ú Feb 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
D. Prepare for the Removal
S 864-002
(1) Do this task to pressurize hydraulic systems No. 1 and 4:
"Pressurize Hydraulic Systems" (AMM 29-11-00/201).
S 864-034
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 flaps and attach a DO-NOT-MOVE tag.
S 864-004
(3)
Do this task to depressurize hydraulic systems No. 1 and 4:
"Depressurize Hydraulic Systems" (AMM 29-11-00/201).
E.
Install the flap lock tools onto the flap track carriages (Fig. 401):
S 864-005
(1)
Do this task: "Supply Electrical Power" (AMM 24-22-00/201).
S 864-006
(2)
Move the flaps electrically until the carriage is in the correct position:
(a)
For the outboard flaps, the carriage must be approximately
1.95 inches (49.53 mm) forward of the full down position.
(b) For the inboard flaps, the carriage must be approximately
7.85 inches (199.4 mm) forward of the full down position.
S 864-008
(3) Do this task: "Remove Electrical Power" (AMM 24-22-00/201).
S 944-039
CAUTION: DO NOT MOVE THE OUTBOARD FLAPS AFTER YOU INSTALL ONE FLAP LOCK.
_______ IF YOU CANNOT INSTALL THE SECOND LOCK, REMOVE THE FIRST LOCK BEFORE YOU READJUST THE FLAPS. YOU CAN CAUSE DAMAGE TO THE FLAP DRIVE MECHANISM.
(4)
If you will remove the ball screw at flap track location number 1, 2, 7 or 8, install the outboard trailing edge flap lock tool on the carriage of the outboard trailing edge flap at the location of the ball screw that will be removed.
(a)
Adjust the tool to the correct length.
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