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AIR INLET PORT
AIR INLET PORT
PNEUMATIC ACTUATOR EXTENDED 
COOLING AIR SHUTOFF VALVE IN OPEN POSITION  1  EXTENDED ACTUATOR PNEUMATIC 
COOLING AIR SHUTOFF VALVE IN OPEN POSITION  2 
AIR INLET PORT 
AIR INLET PORT 
PNEUMATIC ACTUATOR RETRACTED 
COOLING AIR SHUTOFF VALVE IN CLOSED POSITION  1 
PNEUMATIC ACTUATOR RETRACTED 
1 2 AIRPLANES WITH THE -5 COOLING AIR SHUTOFF VALVE AIRPLANES WITH THE -7 COOLING AIR SHUTOFF VALVE  COOLING AIR SHUTOFF VALVE IN CLOSED POSITION  2 

Cooling Air Shutoff Valve - Adjustment/Test
Figure 501 (Sheet 3)

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E35030
////////////////////////A / GTCP85-129 SERIES /737-300/400/500/ ENGINES/MAINTENANCE MANUAL ////////////////////////
9) AUTOPILOT STABILIZER TRIM SERVO
 S 865-022
 (3)  Install the stabilizer trim lock assembly on the stabilizer trim wheel.
 (a)  
Turn the trim wheel to put the handle at the top of the wheel.

 (b)  
Adjust the height of the trim lock to set the trim wheel handle tightly in the bottom of the yoke.

 (c)  
Install the pin through the yoke and install the safety pin.
 1) E3-3 Electrical Shelf, APU Control Unit

 S 015-004
 (4)  
Open the access door 3701 for the stabilizer trim.

 S 025-023

 (5)  
Disconnect the electrical connector from the stabilizer trim electric actuator.

 S 025-024

 (6)  
Disconnect the electrical connector from the autopilot stabilizer trim servo.

 S 425-025

 (7)  
Install caps on the electrical connectors and receptacles for protection.

 S 725-005

 (8)  
Do the functional test for the shutoff valve:

 (a)  
Disconnect the control air line for the shutoff valve from the pneumatic actuator.

 (b)  
Connect the pressurized air source to the air inlet port on the pneumatic actuator.

 (c)  
Apply an air pressure of 7.0 |0.5 psi (48 |3 kPa) to the
 pneumatic actuator.

 NOTE: The shutoff valve will freely move to the full open
____
 position.

 (d)  Remove the pressurized air from the pneumatic actuator.
 NOTE: The pneumatic actuator spring must return the
____
 shutoff valve to the closed position.

 (e)  
Disconnect the pressurized air source from the air inlet port on the pneumatic actuator.

 (f)  
Connect the control air line for the shutoff valve to the
 pneumatic actuator.

 S 025-019
 (9)  Remove the caps from the electrical connectors and receptacles.
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S 425-020
 (10)
 Connect the electrical connector to the autopilot stabilizer trim servo.

 S 425-021

 (11)
 Connect the electrical connector to the stabilizer trim electric actuator.

 S 415-029

 (12)
 Close the access door 3701 for the stabilizer trim.

 S 865-026

 (13)
 Remove the DO-NOT-CLOSE tag and close the circuit breaker:

 (a)  E3-3 Electrical Shelf, APU Control Unit
 S 865-027
 (14) Remove the stabilizer trim lock assembly from the stabilizer trim wheel.
 (a)  
Remove the safety pin and the pin through the yoke.

 (b)  
Remove the stabilizer trim lock.

 S 865-028
 (15) Set the circuit breakers and the switch:
 (a)  
Remove the DO-NOT-CLOSE tags and close these circuit breakers on the P18 Circuit Breaker Panel. 1) AUTOPILOT STABILIZER TRIM SERVO 2) AUTO FLT CONT SYS A WARN LIGHT BAT 3) AUTO FLT CONT SYS A ENGAGE INTLK A 4) AUTO FLT CONT SYS A FCC DC 5) AUTO FLT CONT SYS A SNSR EXC AC 6) AIRPLANES WITH MECHANICAL AILERON FORCE LIMITER;
　
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