B.
Access

 (1)  
Location Zone
 454 System 1 - Strut Aft Fairing
 464 System 2 - Strut Aft Fairing
 474 System 3 - Strut Aft Fairing
 484 System 4 - Strut Aft Fairing

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 29-11-00
 ALL  ú ú 01 Page 680B ú Jun 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL

 (2)  
Access Panel
 454AL Trailing Edge Fairing Doors - System 1
 464AL Trailing Edge Fairing Doors - System 2
 474AL Trailing Edge Fairing Doors - System 3
 484AL Trailing Edge Fairing Doors - System 4

 C.
Procedure

 S 016-699
 (1)
Open the doors on the trailing edge fairing (AMM 54-62-00/201).

 (a)  
Examine the filter elements for contamination (AMM 29-11-18/201).

 (b)  
If excessive amount of metal particles are found, replace filter elements (AMM 29-11-18/201).

 NOTE: Excessive is offered as a guide and relies on operator
____ and individual mechanic experience. Examine other system filters and magnetic plugs to gain a relative measurement between hydraulic systems. If particles are starting to accumulate quickly or becoming larger, this is the sign to examine or replace the hydraulic pump.
 (c)  For flushing requirement, refer to AMM 29-11-00/201.
 S 416-698
 CAUTION: MAKE SURE YOU LATCH THE FAIRING DOORS ON THE TRAILING EDGE
_______ CORRECTLY. DAMAGE CAN OCCUR IF THE DOORS OPEN DURING A FLIGHT.
 (2)  Close the doors on the trailing edge fairing (AMM 54-62-00/201).
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 29-11-00
 ALL  ú ú 01 Page 680C ú Jun 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 TASK 29-11-00-796-296
 13. Hydraulic System External Leakage Check_______________________________________
 A. References
 (1)  
AMM 05-51-12/201, Fire-Resistant Hydraulic Fluid Reaction with Titanium - Maintenance Practices (Conditional Inspection)

 (2)  
AMM 24-22-00/201, Manual Control

 (3)  
AMM 27-51-00/201, Trailing Edge Flap System

 (4)  
AMM 29-11-00/201, Main Hydraulic Supply System

 (5)  
AMM 32-00-30/201, Landing Gear Doors

 (6)  
AMM 51-41-01/601, External Drainage - Inspection/Check

 (7)  
AMM 54-62-00/201, Nacelle Strut Access Panels

 (8)  
AMM 54-62-02/501, Nacelle Strut Access Doors

 (9)  
AMM 54-62-03/501, Trailing Edge Fairing Doors

 B.
Access

 (1)  
Location Zone 454 System 1 - Strut Aft Fairing 464 System 2 - Strut Aft Fairing 474 System 3 - Strut Aft Fairing 484 System 4 - Strut Aft Fairing 735 Wing Landing Gear Wheel Well - Left Side 745 Wing Landing Gear Wheel Well - Right Side 755 Body Landing Gear Wheel Well - Left Side 765 Body Landing Gear Wheel Well - Right Side

 (2)  
Access Panel 454AL Trailing Edge Fairing Doors - System 1 464AL Trailing Edge Fairing Doors - System 2 474AL Trailing Edge Fairing Doors - System 3 484AL Trailing Edge Fairing Doors - System 4

 C.
Procedure

 (1)  
Supply electrical power (AMM 24-22-00/201).

 S 866-297
 S 496-298
 WARNING:  REFER TO AMM 32-00-30/201 FOR THE INSTALLATION PROCEDURE FOR THE LOCKS ON THE LANDING GEAR DOORS. SUDDEN MOVEMENT OF THE DOORS CAN CAUSE INJURY AND DAMAGE.
 (2)  
Open the landing gear doors and install the locks on the landing gear doors (AMM 32-00-30/201).

 S 496-299

 (3)  
Make sure that the ground lockpins for the landing gears are installed (AMM 09-11-00/201).

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