(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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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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(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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