S 864-004
(3)
Release the pressure in hydraulic systems No. 1 and 4 (Ref 29-11-00/201).
S 494-005
(4)
Install supports on the foreflap to make sure you can remove the bolt which attaches the foreflap and toggle.
S 034-006
(5)
Disconnect the carriage and toggle from the outboard foreflap (Ref 27-51-05/401).
S 024-008
(6)
Remove the outboard foreflap carriage and toggle (Fig. 401).
(a)
Remove the bolts from the links which hold the forward side of the foreflap cam track.
(b)
Remove the lower roller from each side of the foreflap carriage and toggle.
(c)
Lift the carriage from the flap track.
(d)
Install the rollers on the carriage.
TASK 27-51-30-404-010
3. Outboard Foreflap Carriage and Toggle Installation__________________________________________________
A. Consumable Materials
(1)
D00633 Grease - BMS 3-33 (recommended)
(2)
D00013 Grease - MIL-G-23827 (alternative)
B.
References
(1)
27-51-05/401, Outboard Foreflap
(2)
27-51-30/601, Outboard Foreflap Carriage And Toggle
(3)
29-11-00/201, Main Hydraulic Supply System
(4)
IPC 27-51-30, Fig. 1
C.
Access
(1)
Location Zone
586 Outboard Flap Foreflap, LH
686 Outboard Flap Foreflap, RH
D.
Procedure
S 224-022
(1) If you will install used bolts or rollers, examine them for worn areas (Ref 27-51-30/601).
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27-51-30
ALL ú ú 01 Page 402 ú Feb 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL
SEE A
FOREFLAP SEE B
MIDFLAP
AND TOGGLE CARRIAGE FOREFLAP A CARRIAGE
TRACK FLAP AND TOGGLE CARRIAGE FOREFLAP
AFT
SEE C B WASHER
ROLLER NUT C BOLT WASHER
Outboard Foreflap Carriage and Toggle Installation
Figure 401
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27-51-30
ALL ú ú 01 Page 403 ú Jun 10/97
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL
S 424-012
(2)
Install the outboard foreflap carriage and toggle.
(a)
Remove the lower rollers from each side of the foreflap carriage and toggle.
(b)
Put the carriage and toggle in its position on the flap track.
(c)
Install the bolt, washers, roller, and the nut on each side of the carriage.
S 644-013
(3)
Lubricate the carriage and toggle with grease.
S 434-014
(4)
Move the carriage and toggle aft and engage the toggle roller into the track detent.
S 434-015
(5)
Install the links, bolts, and the nuts which attach the forward end of the foreflap to the cam tracks.
S 434-016
(6)
Connect the carriage and toggle to the outboard foreflap (AMM 27-51-05/401).
S 094-017
(7)
Remove the supports from the foreflap.
S 864-018
(8)
Pressurize hydraulic system No. 4 (Ref 29-11-00/201).
S 714-023
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.
CAUTION:_______MONITOR THE FLAP MOVEMENT CAREFULLY. THE FLAPS CAN BE DAMAGED BY INCORRECTLY ADJUSTED COMPONENTS.
(9)
Extend and retract the flaps. Make sure that the flaps move freely.
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