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AIRCRAFT MAINTENANCE MANUAL
EFFECTIVITY
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BOEING PROPRIETARY - Copyright#Unpublished Work - See title page for details
(d) Connect the electrical connectors [2].
SUBTASK 27-41-71-220-001
(5) Use the bonding meter, COM-1550 to make sure the resistance between the stabilizer trim motor
[1] and airplane structure is 0.0025 ohm.
SUBTASK 27-41-71-860-006
(6) Remove the safety tags and close these circuit breakers:
CAPT Electrical System Panel, P18-1
Row Col Number Name
C 2 C00849 AFCS STABILIZER TRIM
F/O Electrical System Panel, P6-2
Row Col Number Name
B 10 C00207 FLIGHT CONTROL STAB TRIM CONT
D 10 C00840 FLIGHT CONTROL STAB TRIM ACTUATOR
SUBTASK 27-41-71-820-001
(7) Do this task: Stabilizer Trim Motor Test, TASK 27-41-71-700-801.
G. Put the Airplane Back to Its Usual Condition
SUBTASK 27-41-71-410-001
(1) Close this access panel:
Number Name/Location
311BL Stabilizer Trim Access Door
------------------------- END OF TASK ---------------------------
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
EFFECTIVITY
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BOEING PROPRIETARY - Copyright#Unpublished Work - See title page for details
STABILIZER TRIM MOTOR - ADJUSTMENT/TEST
1. General
A. This procedure has one task. The task is the test of the stabilizer trim motor, M1659.
TASK 27-41-71-700-801
2. Stabilizer Trim Motor Test
A. References
Reference Title
22-11-81-710-801 Stabilizer Trim Motor Test (P/B 501)
24-22-00-860-811 Supply Electrical Power (P/B 201)
B. Location Zones
Zone Area
211 Flight Compartment - Left
212 Flight Compartment - Right
330 Subzone - Left Horizontal Stabilizer and Elevator
340 Subzone - Right Horizontal Stabilizer and Elevator
C. Prepare for the Test
SUBTASK 27-41-71-860-001
(1) Do this task: Supply Electrical Power, TASK 24-22-00-860-811.
SUBTASK 27-41-71-860-002
(2) Make sure that these circuit breakers are closed:
CAPT Electrical System Panel, P18-1
Row Col Number Name
C 2 C00849 AFCS STABILIZER TRIM
F/O Electrical System Panel, P6-2
Row Col Number Name
B 10 C00207 FLIGHT CONTROL STAB TRIM CONT
D 10 C00840 FLIGHT CONTROL STAB TRIM ACTUATOR
SUBTASK 27-41-71-860-003
(3) Make sure the main cutout switch, S272, on the P8 panel, is in the NORMAL position.
SUBTASK 27-41-71-860-004
(4) Make sure the STAB TRIM switch on the stab trim and cabin door panel, P8-47 is in the NORMAL
position.
D. Procedure
SUBTASK 27-41-71-710-001
(1) Do the test of the stabilizer trim motor:
(a) Set the flaps to any position from 1-40 units.
1) Push and hold the stabilizer trim control switches on the captain’s control wheel to the
NOSE DOWN position.
a) Make sure the stabilizer leading edge moves up.
b) Release the stabilizer trim control switches.
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
EFFECTIVITY
GUN ALL 27-41-71
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D633A101-GUN
BOEING PROPRIETARY - Copyright#Unpublished Work - See title page for details
2) Push and hold the stabilizer trim control switches on the captain’s control wheel to the
NOSE UP position.
a) Make sure the stabilizer leading edge moves down.
b) Release the stabilizer trim control switches.
3) Push and hold the stabilizer trim control switches on the first officer’s control wheel to
the NOSE DOWN position.
a) Make sure the stabilizer leading edge moves up.
b) Release the stabilizer trim control switches.
4) Push and hold the stabilizer trim control switches on the first officer’s control wheel to
the NOSE UP position.
a) Make sure the stabilizer leading edge moves down.
b) Release the stabilizer trim control switches.
5) Push the stabilizer trim control switches on the captain’s control wheel to the NOSE UP
position and then to the NOSE DOWN position.
a) Make sure the time for the stabilizer leading edge to move from its lower limit of
travel to the upper limit of travel is between 31-39 seconds.
b) Make sure the operation is smooth and there is no unusual noise.
6) Use the stabilizer trim control switches on the captain’s control wheel to move the
stabilizer many times in the two directions, one after the other for 3 seconds each.
a) Make sure the operation is smooth and there is no unusual noise.
7) Push and hold the stabilizer trim control switches on the captain’s control wheel to the
NOSE UP position until the system comes to the full trim speed.
a) Move the stabilizer trim control switches momentarily to OFF and then to the NOSE
　
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