(3)
24-22-00/201, Manual Control

 (4)
AMM 45-10-00/201, Central Maintenance Computer System

 (5)
IPC 21-51-16 Fig. 01

 (6)
WDM 21-52-11

 (7)
SSM 21-52-01

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

 (2)  
Access Panels
 191AL Air Conditioning Access Door
 191HL Air Conditioning Access Door
 192AR Air Conditioning Access Door

 C. Install the Temperature Bulb
 S 434-017
 (1) Put a new O-ring on the temperature bulb.
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747-400 MAINTENANCE MANUAL
 S 424-008
 (2)  Use two wrenches to install the temperature bulb.
 NOTE: Use one wrench to hold the boss and the other wrench to
____
 turn the temperature bulb.

 S 424-020
 (3)  
Install a new lockwire on the temperature bulb (AMM 20-11-28/401).

 S 434-009

 (4)  
Connect the electrical connector to the temperature bulb:

 -DT479 for pack 1
 -DT481 for pack 2
 -DT483 for pack 3.
 D. Do the Installation Test for the Temperature Bulb
 S 864-010
 (1) Remove the DO-NOT-CLOSE tags and close these circuit breakers:
 (a)  
P6 Main Power Distribution Panel
 1) 6F35, PACK TEMP CONT A
 2) 6F36, PACK TEMP CONT B

 (b)  
P415 Power Distribution Center - Right
 1) 415K27, PACK TEMP CONT A
 2) 415C38, PACK TEMP CONT B

 S 864-011
 (2)  
Supply electrical power (AMM 24-22-00/201).

 S 864-012

 (3)  
Push the PACK RST switch, on the P5 panel.

 S 864-013

 (4)  
Get access to the CMCS EXISTING FAULTS page for air conditioning (AMM 45-10-00/201).

 S 724-014

 (5)
Look at the CMC Existing Faults page to make sure there are no messages for the compressor discharge temperature bulbs.

 E. Put the Airplane to Its Usual Condition
 S 414-015
 (1)  
Close the applicable access door, 191AL, 191HL, or 192AR
 (AMM 06-09-03/201).

 S 864-016

 (2)  
Remove the electrical power, if it is not necessary
 (AMM 24-22-00/201).

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747-400 MAINTENANCE MANUAL
 WATER COLLECTOR - REMOVAL/INSTALLATION
______________________________________
 1.  General
_______
 A.  The air conditioning system has a water collector in each of the three packs. The water collector is between the outlet of the secondary heat exchanger and the turbine inlet to the air cycle machine (ACM).
 TASK 21-51-25-004-001
 2.  Water Collector Removal (Fig. 401)
_______________________
 A.  References
 (1)  
06-09-03/201, Body Section 44 Access Doors and Panels

 (2)  
IPC TBD

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

 (2)  
Access Panels
 191A-L Air Conditioning Access Door
 191H-L Air Conditioning Access Door
 192A-R Air Conditioning Access Door

 C.  Prepare for the Removal
 S 864-002
 (1)  Turn the applicable (1, 2, or 3) PACKS selector, on the overhead panel, P5, to the OFF position.
 (a)  Put a DO-NOT-OPERATE tag on the selector.
 S 014-003
 (2)  Open the applicable access door (Ref 06-09-03/201):
　
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