(2)
14ME65B00116, Outboard Foreflap Strongback (Part of Outboard Trailing Edge Flap Strongback Kit 19ME65B00116).
(3)
G27032-8 (preferred), G27032-1 (optional) Outbd Spoiler Actuator Lock
B.
Standard Tools and Equipment
(1)
Load Positioner LL-5-3, Permadur Industries, P.O. Box 1032, Somerville, New Jersey 08876
C.
References
(1)
AMM 29-11-00/201, Main Hydraulic Supply System
(2)
AIPC 27-51-04, Fig. 1
(3)
AIPC 27-51-04, Fig. 5
D.
Access
(1)
Location Zone
586 Outboard Flap Foreflap, LH
686 Outboard Flap Foreflap, RH
E.
Prepare for the Removal
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL
S 864-002
WARNING: OPEN THE CIRCUIT BREAKERS TO PREVENT RETRACTION OF THE
_______ SPOILERS. THE SPOILERS WILL RETRACT AUTOMATICALLY IF YOU USE THE SPEED BRAKE LEVER TO LIFT THE SPOILERS AND IF HYDRAULIC SYSTEM NO./1 AND 4 ARE NOT PRESSURIZED. INJURY TO PERSONS CAN OCCUR IF THE SPOILERS RETRACT.
(1)
Open these circuit breakers and attach DO-NOT-CLOSE tags:
(a)
P7, Overhead Circuit Breaker Panel
1) 7G6, SPEED BRAKE AUTO CONT
S 864-003
(2)
Pressurize hydraulic systems No. 2, No. 3 and No. 4
(AMM 29-11-00/201).
S 864-004
(3)
Put the speed brake lever in the UP detent to lift spoilers No. 1 thru 4 and 9 thru 12 above the outboard foreflap.
S 494-005
(4)
Install the spoiler actuator locking tools or move the FLT CONTROL HYD POWER switches to SHUTOFF to make sure the spoilers will not retract.
S 864-051
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.
(5)
Put the flap control lever in the 30-unit detent to extend the outboard flaps.
S 864-007
(6)
Release the pressure in hydraulic systems No. 2, No. 3 and No. 4 (AMM 29-11-00/201).
F.
Remove the Outboard Foreflap
S 494-008
(1)
Install the support equipment:
(a)
Remove the screws from the strongback attach points (Fig. 402).
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
FOREFLAP
D
SEE D MIDFLAP
D
SEE A CARRIAGE
SEE E SEE C SEE B
FWD
A
1. FOREFLAP
MIDFLAP TRACK
(4 LOCATIONS) SEQUENCE CARRIAGE
B
FOREFLAP
A
2. BOLT FLAP
C A
TRACK
LEVER 3. WASHER
7. FOREFLAP MIDFLAP
B C
6. NUT
4.
BUSHING
5.
WASHER
C
CARRIAGE
0.80-0.90 INCH
(2.03-2.29 cm) B
SEQUENCE
CARRIAGE 1.00 INCH (2.54 cm) MINIMUM
CLEARANCE WITH THE FLAPS EXTENDED
STRUCTURE 12 TO 14 INCHES (30 TO 36 cm) FROM THE FULL UP POSITION SUPPORT TRACK 0.10-0.20 INCH FOREFLAP (0.25-0.51 cm)
SHIM HOOK MIDFLAP
FLAP FOREFLAP TRACK
ROLLER SUPPORT TUBE
0.35 INCH (0.89 cm) SHIM
0.125 INCH MAXIMUM ROLLER OVERHANG (0.318 cm) WITH RETRACTED FLAPS MAXIMUM
A-A
D
Outboard Foreflap Installation
Figure 401 (Sheet 1)
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