29-11-29
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747-400 MAINTENANCE MANUAL
 S 022-056
 (4)  
Remove the ground service disconnect from the return module port:

 (a)  
Remove the lockwire from the ground service disconnect.

 (b)  
Remove the ground service disconnect from the module port.

 (c)  
Remove the packings and the backup rings from the ground service disconnect. 1) Discard the packings and the backup ring.

 S 432-057
 (5)  Install a cover on the return module port to prevent contamination.
 TASK 29-11-29-402-058
 9. Ground Service Disconnect Installation (Fig. 201)
______________________________________
 A. Consumable Materials
 (1)  
D00153 Fluid - Hydraulic, Fire Resistant BMS 3-11

 B.
References

 (1)  
AMM 29-11-00/201, Main Hydraulic Supply System

 (2)  
AMM 54-62-00/201, Nacelle Strut Access Panels

 (3)  
IPC 29-11-29 Fig. 1, 5, and 51

 C.
Access

 (1)  
Location Zone
 454 System 1 - Strut Aft Fairing
 735 System 2 - Wing Landing Gear Wheel Well
 745 System 3 - Wing Landing Gear Wheel Well
 484 System 4 - Strut Aft Fairing

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

 D.
Procedure

 S 422-087
 (1)  
Install the ground service disconnect:

 (a)  
Lubricate the new packings and the backup ring with hydraulic fluid.

 (b)  
Install the packings and the backup ring on the ground service disconnect.

 NOTE: The packing goes into the groove with the backup
____ ring between the packing and the threads.
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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747-400 MAINTENANCE MANUAL
 (c)  
Remove the cover from the module port.

 (d)  
Install the ground service disconnect in the module port. 1) Install a lockwire on the ground service disconnect.

 S 862-061
 (2)  
Pressurize the hydraulic system with a ground cart
 (AMM 29-11-00/201).

 S 792-062

 (3)  
Examine the return module for leakage.

 (a)  
If you find leakage, repair the cause of it.

 S 862-063
 (4)  Release the pressure in the hydraulic system if it is not necessary for other operations (AMM 29-11-00/201).
 S 412-065
 CAUTION: MAKE SURE YOU LATCH THE FAIRING DOORS ON THE TRAILING EDGE
_______ CORRECTLY. DAMAGE CAN OCCUR IF THE DOORS OPEN DURING A FLIGHT.
 (5)  On systems 1 and 4, close the fairing doors on the trailing edge of the strut (AMM 54-62-00/201).
 TASK 29-11-29-002-066
 10. Relief and Differential Pressure Valve Removal (Fig. 201)
______________________________________________
 A. References
 (1)  
AMM 09-11-00/201, Towing and Taxiing

 (2)  
AMM 29-11-00/201, Main Hydraulic Supply System

 (3)  
AMM 54-62-00/201, Nacelle Strut Access Panels

 (4)  
IPC 29-11-29 Fig. 1, 5, and 51

 B.
Access

 (1)  
Location Zone
 454 System 1 - Strut Aft Fairing
 735 System 2 - Wing Landing Gear Wheel Well
 745 System 3 - Wing Landing Gear Wheel Well
 484 System 4 - Strut Aft Fairing

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 29-11-29
 ALL  ú ú 03 Page 212 ú Feb 18/02
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
　
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