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 G.  The inspar skin panels are constructed of aluminum honeycomb containing fiberglass cores.
 3.  Outboard Flaps (Fig. 1)
______________
 A.  The outboard flaps are similar in design to the inboard flaps; however, the chord length for the outboard flaps tapers downward from inboard (approximately WBL 515.00) to outboard (WBL 822.00). Flap carriages are attached to the midflap segment at WBL 584.98 and 743.83. Flap actuator support fittings are installed on the midflap at WBL 594.98 and 753.83. The foreflap and aftflap have constant sections and are supported by fittings cantilevered from the midflap. Four foreflap support tracks are cantilevered forward from the leading edge of the midflap at WBL 545.00, 632.00, 695.00, and 794.00. Hoist attach points are provided on the upper surface of the midflap in the spar chord areas to lift the three flap sections as a unit. In general, the types of materials used to fabricate the structural components of the outboard flaps are the same as those of the inboard flap.
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 57-52-00
 ALL  ú ú 01 Page 4 ú Jun 10/88
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 TRAILING EDGE FLAPS TO FUSELAGE SEALS -
_______________________________________ REMOVAL/INSTALLATION
____________________
 1. General
_______
 A. This section contains two tasks:
 (1)  
The removal of the flap seals for the trailing edge.

 (2)  
The installation of the flap seals for the trailing edge.

 TASK 57-52-01-004-001
 2. Trailing Edge Flap Seals Removal
________________________________
 A. References
 (1)  
AMM 27-51-00/201, Trailing Edge Flap System

 (2)  
AMM 27-51-02/401, Inboard Foreflap

 B. Access
 (1)  Location Zone
 576 Inboard Flap Foreflap, Left
 577 Inboard Flap Midflap, Left
 578 Inboard Flap Aftflap, Left
 676 Inboard Flap Foreflap, Right
 677 Inboard Flap Midflap, Right
 678 Inboard Flap Aftflap, Right

 C. Prepare for the removal of the seals.
 S 864-004
 (1)  
Extend the flaps fully (AMM 27-51-00/201).

 S 014-005

 (2)  
If the foreflap seal will be removed, remove the foreflap (AMM 27-51-02/401).

 D. Remove the seals.
 S 024-006
 (1)  Remove the aft flap seal.
 (a)  Remove the fasteners from around the aft flap closure rib.
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL

INNER
BAFFLE
RIVET

FLAP (2 LOCATIONS)
CLOSURE RIB  FOREFLAP
SPRING RETAINER (5 LOCATIONS)
A
MIDFLAP
AFTFLAP
FASTENERS
A
(4 LOCATIONS)
RUB STRIP
FWD INBD
TELESCOPIC ASSEMBLY BELLOWS
(2 LOCATIONS)
FOREFLAP
RETAINING STRIP AND FASTENERS
RUB STRIP
BELLOWS
FLAP
CLOSURE RIB

B
FASTENER
(4 LOCATIONS)
SPRING
ASSEMBLY
(5 LOCATIONS)

B
TELESCOPIC ASSEMBLY FWD INBD
(2 LOCATIONS)
MIDFLAP
Inboard Trailing Edge Flap Seals Installation
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL

TELESCOPIC ASSEMBLY
A-A

Inboard Trailing Edge Flap Seals Installation
Figure 401 (Sheet 2)

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