(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
9) AUTOPILOT STABILIZER TRIM SERVO
S 862-031
(2) 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.
S 862-030
(3) Open this circuit breaker and attach a DO-NOT-CLOSE tag:
(a) E3-3 Electrical Shelf, APU Control Unit
S 012-013
(4) Open the APU cowl door:
(a)
Open the latches for the APU cowl door.
(b)
Open the APU cowl door.
(c)
Connect the door support rods.
S 012-016
CAUTION:_______BE CAREFUL WHEN YOU MOVE THE LOWER SHROUD. DAMAGE TO THE SHROUD DRAIN LINES CAN OCCUR.
(5) Remove the lower shroud:
(a)
Hold the lower shroud and open the shroud latches.
(b)
Remove the lower shroud.
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49-51-00
ALL ú ú 01 Page 205 ú Nov 12/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / GTCP85-129 SERIES /737-300/400/500/ ENGINES/MAINTENANCE MANUAL ////////////////////////
S 012-003
(6) Open the access door 3701 for the stabilizer trim.
NOTE: The access to the inspection tube for the fan inlet screen is
____ found through the lightning hole in the horizontal web above the APU.
S 022-033
(7)
Disconnect the electrical connector from the stabilizer trim electric actuator.
S 022-023
(8)
Disconnect the electrical connector from the autopilot stabilizer trim servo.
S 422-024
(9)
Install caps on the electrical connectors and receptacles for protection.
S 032-268
(10)
Remove the pin or bolt that attaches the cap assembly to the inspection tube.
S 032-004
(11)
Remove the cap assembly from the inspection tube.
S 212-005
(12)
With a flashlight, examine the fan inlet screen for oil, lint or other blockage.
(a) If you found blockage, do the cleaning procedure for the fan inlet screen.
TASK 49-51-00-102-006
3. Cooling Fan Inlet Screen Cleaning (Fig. 201)
_________________________________
A. Standard Tools and Equipment
(1)
Vacuum cleaner - to clean, movable with a minimum diameter of
1.0 inch (25 mm) flexible nozzle.
(2)
Retriever, claw type
(3)
Pressure Washer (Commercially Available) - Low pressure water or steam - to supply the solvent to the screen.
(4)
Container - Oil and Solvent resistant
(5)
Gloves - Oil and Solvent resistant
(6)
Goggles
B. Consumable Materials
(1) B00722 Solvent - P-D-680
C. References
(1)
AMM 49-11-00/401, APU Power Plant
(2)
AMM 49-11-00/501, APU Power Plant
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