E. Procedure
 S 214-010
 (1)  Examine the gasket for damage.
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737-300/400/500MAINTENANCE MANUAL
 S 904-011
 (2)  
Replace the gasket if it is damaged (AMM 21-31-12/201).

 S 434-012

 (3)  
Lift the outflow valve through the opening in the airplane with the electrical connectors in the forward position.

 S 434-013

 (4)  
Install the gasket on the valve body (AMM 21-31-12/201).

 S 434-014

 (5)  
Connect the electrical connectors.

 S 434-015

 (6)  
Put the forward end of the valve below the latches and lower the aft end of the valve into its position.

 S 434-016

 (7)  
Tighten the fasteners.

 (a)  Turn the fasteners clockwise until they stop.
 S 114-039
 WARNING: DO NOT GET SOLVENTS IN YOUR MOUTH, OR YOUR EYES, OR ON YOUR
_______ SKIN. DO NOT BREATHE THE FUMES FROM SOLVENTS. SOLVENTS ARE HAZARDOUS MATERIALS. SOLVENTS MAY BE FLAMMABLE OR HARMFUL TO THE ENVIRONMENT. REFER TO PRODUCT MATERIAL SAFETY DATA SHEETS (MSDS) AND LOCAL REQUIREMENTS FOR PROPER HANDLING PROCEDURES.
 (8)  
Clean the area around the outflow valve opening with BMS 11-7, FCC-55, Mek:sec-butyl alcohol (42:58), MEK, or MPK.

 S 394-017

 (9)  
Apply a bead seal around the outflow valve opening.

 (a)  Extend the seal 0.60 inches on the valve body on the forward and aft edges and 0.30 inches around the other edges.
 F. Do a Test of the Valve
 S 864-018
 (1)
Remove the DO-NOT-CLOSE tags and close these circuit breakers:

 (a)  P6-4 Panel
 1) PRESSURIZATION CONTROL (six locations)
 2) OUTFLOW VALVE HEATER

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

 (3)  
Put the L and the R PACK switches to OFF.

 S 864-019
 S 864-020
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 S 864-032
 (4)  
Set the RECIRC FAN switch to OFF.

 S 864-021

 (5)
Put the switch for the pressurization control system to MAN-DC.

 S 864-022

 (6)  
Put the FLT/GRD switch to GRD.

 S 864-023

 (7)  
Put the MANUAL switch to CLOSE.

 S 714-024

 (8)  
Make sure the VALVE position indicator shows that the valve goes to the closed position.

 S 864-025

 (9)  
Close the aft outflow valve with the MANUAL switch.

 S 714-026

 (10)
 Make sure the forward outflow valve is closed.

 S 864-027

 (11)
 Put the mode selector switch to AUTO.

 S 714-028

 (12)
 Make sure the VALVE position indicator shows the valve is full open.

 S 714-029

 (13)
 Make sure the forward outflow valve is open.

 G. Put the Airplane Back to Its Usual Condition
 S 864-030
 (1)  Remove the electrical power if it is not necessary.
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 CABIN PRESSURIZATION OUTFLOW VALVE - REPAIRS
____________________________________________
 1.  General
_______
 A.  This repair procedure replaces the outflow valve frame seal while the outflow valve is installed on the airplane.
　
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