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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 D. Remove the Aspirator
 S 034-017
 (1)  
Cut and remove the lockwires from the water inlet hose and the air inlet tube.

 S 034-004

 (2)  
Disconnect the water inlet hose from the aspirator.

 S 034-013

 (3)  
Disconnect the air inlet tube from the aspirator.

 S 034-005

 (4)  
Remove the bulkhead nut from the header boss.

 S 024-014

 (5)  
Remove the aspirator.

 S 034-006

 (6)  
Remove the bushing, nozzle, and O-rings from the aspirator air inlet.

 TASK 21-51-11-404-007
 3. Water Aspirator Installation (Fig. 401)
____________________________
 A. References
 (1)  
06-09-03/201, Body Section 44 Access Doors and Panels

 (2)  
20-11-28/401, Lockwire

 (3)  
21-51-11/501, Water Aspirator

 (4)  
IPC 21-51-60 Fig. 1, 2 and 3

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

 (2)  
Access Panel
 191E-L Air Conditioning Access Panel
 191N-L Air Conditioning Access Panel
 192E-R Air Conditioning Access Panel

 C. Install the Aspirator
 S 434-008
 (1)  
Install the bushing, nozzle, and O-ring to the aspirator air inlet.

 (2)
Install the O-ring and the backup ring on the aspirator outlet.

 S 424-010

 (3)  
Install the aspirator in the header boss.

 (a)  
Put the aspirator in the header boss.

 (b)  
Align the aspirator with the water inlet hose.

 S 434-009
 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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.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)  Tighten the bulkhead nut to hold the aspirator to the header boss.
 S 434-011
 (4)  Connect the air inlet tube to the aspirator.
 (a)  Install a lockwire on the air inlet tube (Ref 20-11-28/401).
 S 434-018
 (5)  Connect the water inlet hose to the aspirator.
 (a)  Install a lockwire on the water inlet hose (Ref 20-11-28/401).
 D. Put the airplane to its usual condition
 S 414-016
 (1)  Close or install the applicable access door or panel
 (Ref 06-09-03/201):

 -191E-L for pack 1 (access panel)
 -191N-L for pack 2 (access door)
 -192E-R for pack 3 (access panel)
 S 864-015
 (2)  Remove the DO-NOT-OPERATE tag from the applicable PACKS selector, on the P5 panel.
 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
 WATER ASPIRATOR - ADJUSTMENT/TEST
_________________________________
 1.  General_______
 A.  This procedure has instructions to do a test of the water aspirators. One aspirator is installed in each air cooling pack.
 TASK 21-51-11-705-001
 2.  Water Aspirator Test____________________
 A.  References
 (1)  
AMM 06-09-03/201, Body Section 44 Access Doors and Panels

 (2)  
AMM 21-00-00/201, Air Conditioning System

 (3)  
AMM 21-51-05/201, Water Separator

 (4)  
IPC 21-51-05 Fig. 2

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

 (2)  
Access Panel
　
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