S 416-010
 (8) Install the cover of the wing leading edge.
 S 096-014
 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. THIS CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
 WARNING: YOU MUST CAREFULLY DO THE STEPS IN THE TASK BELOW TO REMOVE THE
_______ LE FLAP SAFETY LOCK. THE LE FLAPS CAN MOVE QUICKLY IF YOU DO NOT DO THE STEPS CORRECTLY. THIS CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
 (9) Remove safety locks from leading edge flaps (Ref 27-81-00/201).
 TASK 54-51-01-206-015
 3.  Nacelle Strut Wear Limits_________________________
 A. References
 (1)
AMM 54-51-02/401, Nacelle Strut Attach Pin/Bolt

 (2)
AMM 54-51-03/401, Spring Beam

 (3)
OHM 54-00-01, Nacelle Strut to Component

 (4)
SRM 54-50-02, Allowable Damage - Strut Attachment Fitting

 (5)
SRM 57-20-90, Allowable Damage - Pylon Attachment Fitting

 B. Access
 (1)  Location Zone 451 Nacelle Strut 1 - Forward Fairing 452 Nacelle Strut 1 - Torque Box 454 Nacelle Strut 1 - Aft Fairing 521 Nacelle Strut 1 - Leading Edge to Front Spar 461 Nacelle Strut 2 - Forward Fairing 462 Nacelle Strut 2 - Torque Box 464 Nacelle Strut 2 - Aft Fairing 521 Nacelle Strut 2 - Leading Edge to Front Spar 471 Nacelle Strut 3 - Forward Fairing 472 Nacelle Strut 3 - Torque Box 474 Nacelle Strut 3 - Aft Fairing 621 Nacelle Strut 3 - Leading Edge to Front Spar 481 Nacelle Strut 4 - Forward Fairing 482 Nacelle Strut 4 - Torque Box 484 Nacelle Strut 4 - Aft Fairing 621 Nacelle Strut 4 - Leading Edge to Front Spar
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A
747-400
MAINTENANCE MANUAL

 (2)  Access Panel 454 Trailing Edge Fairing Door - Nacelle Strut 1 521FT Wing Leading Edge Cover - Nacelle Strut 1 464 Trailing Edge Fairing Door - Nacelle Strut 2 511CT Wing Leading Edge Cover - Nacelle Strut 2 474 Trailing Edge Fairing Door - Nacelle Strut 3 611CT Wing Leading Edge Cover - Nacelle Strut 3 484 Trailing Edge Fairing Door - Nacelle Strut 4 621FT Wing Leading Edge Cover - Nacelle Strut 4
 C. Procedure
 S 016-017
 (1)  
Get access to the applicable component (AMM 54-51-02/401).

 S 226-016

 (2)  
Do a check of the nacelle strut wear limits:

 (a)  
Remove the nacelle strut attach pins/bolts that you will examine (AMM 54-51-02/401).

 (b)  
Examine the attach pins/bolts. 1) See Figure 602 for inboard strut wear limits. 2) See Figure 603 for outboard strut wear limits.

 (c)  
Install the nacelle strut attach pins/bolts that you removed (AMM 54-51-02/401).

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MAINTENANCE MANUAL

SEE A
SEE UPPER LINK  D  SEE  F  SIDE BRACE GSEE  SEE  B 
SEE  E  DIAGONAL BRACE 
SEE  C 
NACELLE STRUT TORQUE BOX 

INBOARD STRUT
A

Inboard Strut Wear Limits
Figure 602 (Sheet 1)

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 ú 01 ú BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.  Page 607Feb 10/95 

E76808
A 747-400 MAINTENANCE MANUAL
2. BUSHING/PIN

DIAGONAL BRACE AFT FUSE PIN

B

4. BUSHING/PIN

(REF)
DIAGONAL BRACE FORWARD FUSE PIN
　
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