(44)
 Put the airplane back to its usual condition.

 S 716-047

 (45)
 Do the Engine Bleed Air Control System Operational Test (Engine) (Ref 36-11-05/501).

 H. Examine the PRSOV and Bleed Air Regulator Control System
 S 726-138
 (1)  Use a wrench to manually open the PRSOV. Make sure the PRSOV moves freely. Release the PRSOV from the full-open position.
 (a)  
If the PRSOV returns to the full-closed position, go to H.(2).

 (b)  
If the PRSOV fails to return to the full-closed position, replace the PRSOV (AMM 36-11-15/401), then continue.

 S 026-048
 (2)  
Remove the Cap from Test Set Fitting No. 1.

 S 036-049

 (3)  
Disconnect the Bleed Air Regulator supply pressure line.

 S 426-050

 (4)  
Install a NAS1762J0606 90° Elbow on the supply pressure port of the Bleed Air Regulator. (Optional)

 S 436-051

 (5)  
Connect the -6 end of a TYPE A hose to the Bleed Air Regulator supply pressure port.

 S 436-052

 (6)  
Connect the -4 end of the same TYPE A hose to the NO. 1 Test Set Fitting.

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737-300/400/500MAINTENANCE MANUAL
 (7)  S 036-053Disconnect the Bleed Air Regulator control pressure line.
 (8)  S 436-054Install a NAS1762J0606 90° Elbow on the Bleed Air Regulator Control pressure port. (Optional)
 (9)  S 026-055Remove the cap from Test Set Fitting No. 2.
 S 436-056

 (10)
 Connect the -6 end of a TYPE A hose to the control pressure port on the Bleed Air Regulator.

 S 436-057

 (11)
 Connect the -4 end of the same TYPE A hose to Test Set Fitting No. 2. (See Fig. 603 Sheet 1)

 S 866-058

 (12)
 Supply electrical power to the airplane (Ref 24-22-00/201).

 S 866-059

 (13)
 Set the applicable bleed switch on the P5-10 Air-Conditioning Module to the ON position.

 S 716-060

 (14)
 Turn the Primary Regulator knob clockwise until (100.0 | 1.0) psig. is indicated on the Primary System Gauge.

 S 716-061

 (15)
 Set the SYSTEM SELECTOR valve handle to the B position.

 S 216-139

 (16)
 Examine the pressure indication on the test set gauge No. 4.

 (a)  If the pressure indicated on Test Set gauge No. 4 is (20.0 to 28.0) psig, go to step H.(17).
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A

737-300/400/500MAINTENANCE MANUAL 
PORTABLE VALVE 
ACTUATING 
TEST SET  BLEED AIR 
(EXAMPLE)  REGULATOR 
SEE  A  B 

TEST SET
FITTING NO. 2

TEST SET BLEED AIR
FITTING NO. 1 REGULATOR
TYPE A
PRESSURE HOSE

CONTROL PRESSURE PORT
SUPPLY
PRESSURE PORT

RIGHT SIDE INNER EXTENSION RING (REF) FWD
A
Bleed Air Regulator and PRSOV System Inspection/Check
Figure 603 (Sheet 1)

M26859
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737-300/400/500MAINTENANCE MANUAL
 (b) If the pressure indicated on Test Set Gauge No. 4 is NOT
 (20.0 to 28.0) psig, replace the bleed air regulator (AMM 36-11-16/401), then continue.
 S 716-062
 (17)
 Turn the Primary Regulator counterclockwise until (0.0) psig. is indicated on the Primary System Gauge.
　
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