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A
737-300/400/500MAINTENANCE MANUAL
 PRESSURE CONTROLLER - REMOVAL/INSTALLATION
__________________________________________
 1.  General_______
 A.  This procedure has two tasks. The first task gives instructions for the removal of the pressure controller. The second task gives instructions for the installation of the pressure controller.
 B.  The pressure controller is on the top shelf of the E1 rack in the E/E equipment compartment (Fig. 401).
 TASK 21-31-21-004-003
 2.  Pressure Controller Removal (Fig. 401)___________________________
 A.  References
 (1)  20-10-07/201, E/E Rack-Mounted Components
 B.  Access
 (1)  
Location Zone
 205 Electronic Compartment

 (2)  
Access Panel
 1201L Electronic Equipment Access Door

 

 C.  Procedure
 S 864-016
 (1)  Open these circuit breakers on the P6-4 circuit breaker panel and attach DO-NOT-CLOSE tags:
 (a)  
6F1 PRESSURIZATION CONTROL - AUTOMATIC AC

 (b)  
6F2 PRESSURIZATION CONTROL - AUTOMATIC DC

 (c)  
6F3 PRESSURIZATION CONTROL - STBY AC

 (d)  
6F4 PRESSURIZATION CONTROL - STBY DC

 (e)  
6F5 PRESSURIZATION CONTROL - MAN AC

 (f)  
6F6 PRESSURIZATION CONTROL - MAN DC

 S 864-017
 (2)  Open these circuit breakers on the P6-3 panel and attach DO-NOT-CLOSE identifiers:
 (a)  All the circuit breakers on the CONTROL CABIN LIGHTING module
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL

A

Pressure Contoller Location
Figure 401

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
 (b)  6C18 LANDING GEAR - AIR/GND RELAY & LTS
 S 864-018
 (3)  Open these circuit breakers on the P18-2 panel and attach DO-NOT-CLOSE identifiers:
 (a)  
18A8 No. 1 AIR DATA COMPUTER AC

 (b)  
18A9 NO. 1 AIR DATA COMPUTER (25 VAC)

 S 014-001
 (4)  Get access to the pressure controller on the top shelf of the E1 rack.
 S 024-011
 CAUTION: DO NOT TOUCH THE CONNECTOR PINS OR OTHER CONNECTORS ON THE
_______ PRESSURE CONTROLLER. IF YOU TOUCH THESE CONDUCTORS, ELECTROSTATIC DISCHARGE CAN CAUSE DAMAGE TO THE PRESSURE CONTROLLER.
 (5)  Remove the pressure controller (AMM 20-10-07/201).
 TASK 21-31-21-404-004
 3. Pressure Controller Installation (Fig. 401)
________________________________
 A. References
 (1)  
20-10-07/201, E/E Rack-Mounted Components

 (2)  
21-31-00/201, Pressurization Control System

 B. Access
 (1)  
Location Zone
 205 Electronic Compartment

 (2)  
Access Panel
 1201L Electronic Equipment Access Door

 

 C. Procedure
 S 014-005
 (1)  
Get access to the top shelf of the E1 rack.

 (2)  
Install the pressure controller (AMM 20-10-07/201).

 S 424-006
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
 (3)  S 864-019Remove the DO-NOT-CLOSE identifiers and close these circuit breakers on the P6-4 panel: (a) 6F1 PRESSURIZATION CONTROL - AUTOMATIC AC (b) 6F2 PRESSURIZATION CONTROL - AUTOMATIC DC (c) 6F3 PRESSURIZATION CONTROL - STBY AC (d) 6F4 PRESSURIZATION CONTROL - STBY DC (e) 6F5 PRESSURIZATION CONTROL - MAN AC (f) 6F6 PRESSURIZATION CONTROL - MAN DC
　
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