S 424-028
(8)
Connect the electrical connector to the stabilizer trim electric actuator.
S 414-009
(9)
Close the access door for the horizontal stabilizer compartment.
S 864-023
(10)
Remove the DO-NOT-CLOSE tag and close the circuit breaker:
(a) E3-3 Electrical Shelf, APU Control Unit
S 864-024
(11) 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.
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////////////////////////A / GTCP85-129 SERIES /737-300/400/500/ ENGINES/MAINTENANCE MANUAL ////////////////////////
S 864-025
(12) 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;
AFDS AIL FORCE LIM
7) AFDS MCP DC
8) AUTO FLT CONT SYS A MACH TRIM DC
9) AUTO FLT CONT SYS A MACH TRIM AC
(b)
Remove the DO-NOT-CLOSE tags and close these circuit breakers on the P6 Circuit Breaker Panel: 1) AUTO FLT CONT SYS B WARN LIGHT BAT 2) AUTO FLT CONT SYS B ENGAGE INTLK B 3) AUTO FLT CONT SYS B FCC DC 4) AUTO FLT CONT SYS B SNSR EXC AC 5) AFDS MCP CRS-2 6) AUTO FLT CONT SYS B MACH TRIM DC 7) AUTO FLT CONT SYS B MACH TRIM AC 8) STABILIZER TRIM CONT 9) STABILIZER TRIM ACTUATOR
(c)
Remove the DO-NOT-OPERATE tag from the APU master switch on the P5 forward overhead panel.
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COOLING AIR SHUTOFF VALVE - ADJUSTMENT/TEST
___________________________________________
1. General
_______
A. This procedure gives the steps to do the tests of the cooling air shutoff valve pneumatic actuator (which is referred to in this procedure as the pneumatic actuator). The pneumatic actuator is part of the shutoff valve. The procedure makes sure the shutoff valve moves freely.
B. This procedure does an operational test of the pneumatic actuator and
examines the shutoff valve for smooth operation. You can get access to
the pneumatic actuator through the lightning holes in the horizontal web
above the APU.
TASK 49-51-21-705-009
2. Operational Test - Cooling Air Shutoff Valve (Fig. 501)
____________________________________________
A. Special Tools and Equipment
(1) F71336-501 - Horizontal Stabilizer Trim Lock
B. References
(1) AMM 49-11-00/201, APU Power Plant
C. Access
(1)
Location Zones
101 Control Cabin (Left)
701 Tail Compartment
(2)
Access Panels
3701 Stabilizer Trim Access Door
D. Procedure
S 865-010
(1) Open this circuit breaker and attach a DO-NOT-CLOSE tag:
(a) P6-2 Load Control Center Assembly
1) STABILIZER TRIM, CONT
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