21-31-00
 ALL  ú ú 03 Page 203 ú Nov 15/94
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
 S 862-018
 (11)
 Not less than 20 seconds after you moved the mode selector to CHECK, move the FLT/GRD switch to FLT.

 S 862-019

 (12)
 Make sure these results occur:

 (a)  
AUTO FAIL light stays off

 (b)  
STANDBY light stays off

 (c)  
The outflow valve indicator shows that the outflow valve closes.

 S 862-020
 (13) Move the mode selector to AUTO and make sure these results occur:
 (a)  
AUTO FAIL light comes on

 (b)  
STANDBY light comes on

 (c)  
The outflow valve stays closed

 S 862-021
 (14)
 Visually make sure that the forward outflow valve is closed.

 S 862-022

 (15)
 Move the mode selector to MAN AC and make sure these results occur:

 (a)  
AUTO FAIL light goes off

 (b)  
STANDBY light goes off

 (c)  
MANUAL light comes on

 S 862-023
 (16)
 Move the FLT/GRD switch to GRD.

 S 862-024

 (17)
 Hold the MANUAL switch in OPEN and make sure the VALVE position indicator shows the aft outflow valve opens.

 S 862-025

 (18)
 Hold the MANUAL switch in CLOSE and make sure the VALVE position indicator shows the aft outflow valve closes.

 S 862-026

 (19)
 Move the mode selector to MAN DC and make sure these results occur:

 (a)  
AUTO FAIL light stays off.

 (b)  
STANDBY light stays off

 (c)  
MANUAL stays on

 S 862-027
 (20)
 Hold the MANUAL switch in OPEN and make sure the VALVE position indicator shows the aft outflow valve opens.

 S 862-028

 (21)
 Hold the MANUAL switch in CLOSED and make sure the VALVE position indicator shows the aft outflow valve closes.

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 21-31-00
 ALL  ú ú 02 Page 204 ú Jul 15/94
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
 S 862-029
 (22)
 Not less than 20 seconds after you moved the mode selector to MAN, move the mode selector to AUTO.

 S 862-030

 (23)
 Make sure these results occur:

 (a)  
AUTO FAIL light stays off

 (b)  
STANDBY light stays off

 (c)  
OFF SCHED DESCENT light stays off

 (d)  
MANUAL light goes off

 (e)  
Outflow valve indicator shows the aft outflow valve opens.

 (f)  
Visually make sure that the forward outflow valve is open.

 E. Put the Airplane Back to Its Usual Condition
 S 412-034
 (1)
Install the forward left lining in the forward cargo compartment.

 S 862-031

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

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 21-31-00
 ALL  ú ú 02 Page 205 ú Jul 15/94
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
 PRESSURIZATION CONTROL SYSTEM - ADJUSTMENT/TEST
_______________________________________________
 1.  General_______
 A.  This test has six tasks. The six tasks are:
 (1)  
System Test - Pressurization Control System

 (2)  
Functional Test of the Pressure Controller

 (3)  
Standby Rate Check

 (4)  
Standby Altitude Check

 (5)  
Automatic Rate Check

 (6)  
Resistance Test of the Pressurization Outflow Valve.
　
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