(a)  
Light leakage is permitted.

 (b)  
If the leakage is strong, align the joints and tighten the clamps.

 S 414-035
 (4)  
Install the cargo handling hardware and floor panels that you removed (AMM 25-58-01/401, AMM 53-21-02/401).

 S 864-027

 (5)  
Remove the conditioned air if it is not necessary (Ref 21-00-00/201).

 S 094-032
 WARNING: REFER TO THE SPECIFIED PROCEDURE WHEN YOU REMOVE THE DOOR LOCKS
_______ FROM THE LANDING GEAR DOORS. THE DOORS CAN CLOSE QUICKLY IF THERE IS PRESSURE IN THE SYSTEM. THIS CAN CAUSE INJURIES TO PERSONS AND DAMAGE TO THE EQUIPMENT.
 (6)  Remove the body and the wing gear door locks (Ref 32-00-30/201).
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 21-21-01
 ALL  ú ú 04 Page 406 ú Feb 10/94
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 GROUND SERVICE CONNECTOR - REMOVAL/INSTALLATION
_______________________________________________
 1.  General_______
 A.  This subject contains these tasks:
 -Remove a ground service connector
 -Install a ground service connector
 -Remove the swing check valve from a ground service connector
 -Install the swing check valve into a ground service connector
 B.  The operations that are necessary to remove and install a ground service connector are as follows:
 -Make sure the air conditioning packs are off
 -Open the applicable access door on the air conditioning bay
 -Remove and install the ground service connector
 -Examine the installation for air leaks.
 C.  A ground service connector is installed downstream of the water
 separators in the air conditioning packs 1 and 3.

 TASK 21-21-03-004-001
 2.  Remove the Ground Service Connector (Fig. 401)___________________________________
 A.  References
 (1)  
06-09-03/201, Body Panels and Access Doors

 (2)  
IPC 21-21-52 Fig. 1

 (3)  
IPC 21-21-54 Fig. 1

 B.  Access
 (1)  
Location Zone
 133 Air Conditioning Equipment Bay, LH
 134 Air Conditioning Equipment Bay, RH

 (2)  
Access Panel
 192HR Air Conditioning Access Door
 191NL Air Conditioning Access Door

 C.  Procedure
 S 014-002
 (1)  
Lower the applicable access door on the air conditioning bay (Ref 06-09-03/201).

 S 024-003

 (2)  
Remove the support rod bolts at the support clamp on the ground service connector. Keep the clamp on the duct.

 S 024-004

 (3)  
Remove the ground service connector.

 (a)  
Hold the ground service connector.

 (b)  
Loosen the clamps at each end of the ground service connector.

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 21-21-03
 ALL  ú ú 01 Page 401 ú Oct 18/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A

747-400
MAINTENANCE MANUAL

PACK 2 GROUNDPACK 1 GROUND SERVICE CONNECTOR
SERVICE CONNECTOR SEEA 1
SEE A FWD
PACK 3 GROUND SERVICE CONNECTOR
SEE B
AIR CONDITIONING EQUIPMENT BAY
SUPPORT ROD
SUPPORT CLAMP
GROUND SERVICE CONNECTOR
SEE C
SUPPORT ROD
A
AIRPLANES WITH THREE GROUND SERVICE CONNECTIONS
1
Ground Service Connector Installation Figure 401 (Sheet 1)
H48902
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 21-21-03
 ALL  ú ú 03 Page 402 ú Feb 18/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
　
中國航空網(wǎng) m.k6050.com
航空翻譯 www.aviation.cn
本文鏈接地址：747-400 AMM 飛機(jī)維護(hù)手冊 空調(diào) AIR CONDITIONING 1(22)