S 862-007
 (3) Make sure the door for the water service panel is closed.
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A
747-400 MAINTENANCE MANUAL
 COMPRESSOR/BLEED AIR INTERLOCK SWITCH - REMOVAL/INSTALLATION
____________________________________________________________
 1.  General_______
 A.  The compressor/bleed air interlock switch will be referred to as
 compressor switch in this procedure.

 B.  This procedure includes two tasks; the removal, and the installation of the switch.
 TASK 38-15-61-384-001
 2.  Compressor Switch Removal (Fig. 401)_________________________
 A.  Reference
 (1)  AMM 38-15-60/201, Water System Pressurization
 B.  Access
 (1)  Access Panel
 191 FF Access Door, Water Service

 C.  Procedure
 S 864-002
 (1)
Do this task: "Water System Depressurization (AMM 38-15-60/201).

 S 014-003

 (2)  
If it is not open, open the access door for the water service panel.

 S 034-004

 (3)  
Cut each of the electrical wires to the compressor switch at the splice point.

 S 034-005

 (4)  
Remove the bottom nut.

 (5)  
Lift the compressor switch out the bracket.

 S 024-006
 TASK 38-15-61-384-007
 3.  Compressor Switch Installation (Fig. 401)______________________________
 A.  References
 (1)  
AMM 24-22-00/201, Manual Control

 (2)  
AMM 38-15-60/201, Water System Pressurization

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747-400
MAINTENANCE MANUAL

Compressor/Bleed Air Interlock Switch Installation
Figure 401

C24214
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747-400
MAINTENANCE MANUAL

 B. Access
 (1)  Access Panel
 Access Door, Water Service

 C. Procedure
 S 424-008
 (1)  
Hold the compressor switch in its position.

 S 434-009

 (2)  
Install the nut below the compressor switch.

 S 424-010

 (3)  
Make splices between the wires for the compressor switch to connect the airplanes wires.

 S 864-011

 (4)
Do this task: "Water System Pressurization" (AMM 38-15-60/201).

 S 724-012

 (5)  
Do a check of the operation of the compressor switch.

 (a)  
Close the access door for the water service panel.

 (b)  
Make sure the air compressor operates.

 (c)  
Open the access door for the water service panel.

 (d)  
Make sure the air compressor does not operate.

 S 824-013
 (6)  
If it is necessary, adjust the nuts that hold the compressor switch on the top bracket to agree with the above conditions.

 (7)
Remove electrical power if it is not necessary (AMM 24-22-00/201).

 S 864-014
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