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 position.
 (l)  Set the RECIRC FAN switch to OFF.
 1) Make sure the forward outflow valve moves to the full-open
 position.
 (m)  Set the mode selector switch on the pressurization control
 panel to MAN AC.
 (n)  Use the toggle switch on the pressurization control module to
 set the aft outflow valve to the full-closed position.
 1) Make sure the forward outflow valve moves to the
 full-closed position as the aft outflow valve moves to the
 full-closed position.
 (o)  Use the toggle switch to manually set the aft outflow valve to
 the full-open position.
 1) Make sure the forward outflow valve moves to the full-open
 position.

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737-300/400/500MAINTENANCE MANUAL
 (p)  Install the forward left lining in the forward cargo compartment.
 D. Put the Airplane Back to Its Usual Condition
 S 414-006
 (1)  
Close the access door, 1201L, for the electronic compartment.

 S 864-016

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

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737-300/400/500MAINTENANCE MANUAL
 AIR CONDITIONING ACCESSORY UNIT - ADJUSTMENT/TEST
_________________________________________________
 1.  General_______
 A.  This procedure has one task. The task is to do an adjustment/test procedure on the Air Conditioning Accessory Unit (M324 relays module) after installation.
 B.  All of the steps in the procedure must be completed to make sure the Air Conditioning Accessory Unit is serviceable.
 NOTE: If you replaced the Air Conditioning Accessory Unit (ACAU)
____ because it had a defect, it is recommended that all steps of the adjustment/test be completed. However, if there is not sufficient time to do the full adjustment/test, you may make a decision to do only the part of the adjustment/test that tests the system that was found to be defective before the ACAU replacement. If just this one test is done, you must do all of the ACAU post-installation test when there is sufficient time to ensure that all systems controlled by the ACAU are completely operational.
 C.  The Air Conditioning Accessory Unit is installed in the electronic equipment compartment on the E3-2 shelf.
 TASK 21-51-06-705-001
 2.  Air Conditioning Accessory Unit Post Installation Test______________________________________________________
 A.  Reference
 (1)
24-22-00/201, Manual Control

 (2)
36-05-00/201, Pneumatic System

 B.  Access
 (1)  
Location Zones
 202 Lower Nose Compartment
 210 Air-Conditioning Distribution Bay
 212 Right Air-Conditioning Equipment Bay
 214 Left Air-Conditioning Distribution Bay
 505 RH Thrust Reverser
 605 RH Thrust Reverser

 (2)  
Access Panels
 1103 Forward Access Panel
 3303 Left Air-Conditioning Access Panel
 3403 Right Air-Conditioning Access Panel
 5731 Left Access Door Strut
 5739 Left Thrust Reverser Cowl Assembly
 5831 Right Access Door Strut
 5839 Right Thrust Reverser Cowl Assembly

 

 C.  Prepare for the Test
 S 865-002
 (1) Supply electrical power (Ref 24-22-00/201).
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