S 715-012

 (3)  
Do the operational test for the shutoff valve and the pneumatic actuator:

 (a)  
Start the APU (AMM 49-11-00/201).

 (b)  
During the APU operation, visually make sure the shutoff valve and the pneumatic actuator operate correctly.

 (c)  
Do the APU usual shutdown (AMM 49-11-00/201).

 (4)  
Close the access door 3701 for the stabilizer trim.

 S 865-014

 (5)  
Remove the DO-NOT-CLOSE tag and close this circuit breaker:

 S 415-013
 (a)  P6-2 Load Control Center Assembly
 1) STABILIZER TRIM, CONT

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////////////////////////A / GTCP85-129 SERIES /737-300/400/500/ ENGINES/MAINTENANCE MANUAL ////////////////////////
TASK 49-51-21-705-001
 3. Functional Test - Cooling Air Shutoff Valve (Fig. 501)
___________________________________________
 A. Standard Tools and Equipment
 (1)  Pressurized Air Source - 7 psi (48 kPa) minimum
 B. Access
 (1)  
Location Zones
 101 Control Cabin (Left)
 205 Electronic Compartment
 701 Tail Compartment

 (2)  
Access Panels
 1201 Electronic Equipment Access Door
 3701 Stabilizer Trim Access Door

 C. Procedure
 S 865-002
 (1)
Set the horizontal stabilizer trim in the full up position.

 S 865-003

 (2)  
Set the switch and the circuit breakers:

 (a)  
Set the APU master switch on the P5 forward overhead panel to the OFF position and attach a DO-NOT-OPERATE tag.

 (b)  
Open these circuit breakers on the P6 Circuit Breaker Panel and attach the DO-NOT-CLOSE tags: 1) STABILIZER TRIM ACTUATOR 2) STABILIZER TRIM CONT 3) AUTO FLT CONT SYS B MACH TRIM AC 4) AUTO FLT CONT SYS B MACH TRIM DC 5) AFDS MCP CRS-2 6) AUTO FLT CONT SYS B SNSR EXC AC 7) AUTO FLT CONT SYS B FCC DC 8) AUTO FLT CONT SYS B ENGAGE INTLK B 9) AUTO FLT CONT SYS B WARN LIGHT BAT

 (c)  
Open these circuit breakers on the P18 Circuit Breaker Panel and attach the DO-NOT-OPERATE tags: 1) AUTO FLT CONT SYS A MACH TRIM AC 2) AUTO FLT CONT SYS A MACH TRIM DC 3) AFDS MCP DC 4) AIRPLANES WITH MECHANICAL AILERON FORCE LIMITER;

 AFDS AIL FORCE LIM 5) AUTO FLT CONT SYS A SNSR EXC AC 6) AUTO FLT CONT SYS A FCC DC 7) AUTO FLT CONT SYS A ENGAGE INTLK A 8) AUTO FLT CONT SYS A WARN LIGHT BAT
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SEE A
FLIGHT COMPARTMENT
YOKE
STABILIZER
TRIM WHEEL

TRIM WHEEL CONTROL STAND
HANDLE
STABILIZER TRIM LOCK
A
Cooling Air Shutoff Valve - Adjustment/Test
Figure 501 (Sheet 1)

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H00088
////////////////////////A / GTCP85-129 SERIES /737-300/400/500/ ENGINES /MAINTENANCE MANUAL ////////////////////////
SEE B
STABILIZER
JACKSCREW

STABILIZER TRIM 
ELECTRICAL ACTUATOR  ELECTRICAL 
CONNECTOR 
ELECTRICAL 
CONNECTOR 

AUTOPILOT STABILIZER TRIM SERVO
MANUAL TRIM DRIVE CABLE DRUM
B
Cooling Air Shutoff Valve - Adjustment/Test Figure 501 (Sheet 2)
H00091
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