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(6) For the autopilot cutout switch, do this task: Autopilot Cutout Switch Test,
TASK 27-41-91-700-802.
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STABILIZER TRIM CUTOUT SWITCHES - ADJUSTMENT/TEST
1. General
A. This procedure has these tasks:
(1) A test of the main cutout switch, S272
(2) A test of the autopilot cutout switch, S149.
B. The main cutout switch and autopilot cutout switch are installed on the control stand.
TASK 27-41-91-700-801
2. Main Cutout Switch Test
A. References
Reference Title
24-22-00-860-811 Supply Electrical Power (P/B 201)
B. Location Zones
Zone Area
212 Flight Compartment - Right
C. Prepare for the Test
SUBTASK 27-41-91-860-001
(1) Do this task: Supply Electrical Power, TASK 24-22-00-860-811.
SUBTASK 27-41-91-860-002
(2) Close these circuit breakers:
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 27-41-91-860-003
(3) Make sure that the STAB TRIM switch on the stab trim and cabin door panel, P8-47 is in the
NORMAL position.
D. Main Cutout Switch Test
SUBTASK 27-41-91-710-001
(1) Do the test of the main cutout switch, S272:
(a) Set the main cutout switch to the NORMAL position.
1) Push and hold the STAB TRIM switches on the captain’s control wheel to the NOSE UP
position.
2) Make sure the stabilizer leading edge moves down.
3) Set the main cutout switch to the CUTOUT position.
4) Make sure that the movement of the stabilizer stops immediately.
5) Release the STAB TRIM switches.
(b) Set the main cutout switch to the NORMAL position.
1) Push and hold the STAB TRIM switches on the captain’s control wheel to the NOSE
DOWN position.
2) Make sure the stabilizer leading edge moves up.
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3) Set the main cutout switch to the CUTOUT position.
4) Make sure that the movement of the stabilizer stops immediately.
5) Release the STAB TRIM switches.
(c) Set the main cutout switch back to the NORMAL position.
------------------------- END OF TASK ---------------------------
TASK 27-41-91-700-802
3. Autopilot Cutout Switch Test
A. References
Reference Title
24-22-00-860-811 Supply Electrical Power (P/B 201)
B. Location Zones
Zone Area
212 Flight Compartment - Right
C. Prepare for the Test
SUBTASK 27-41-91-860-004
(1) Do this task: Supply Electrical Power, TASK 24-22-00-860-811.
SUBTASK 27-41-91-860-005
(2) Close these circuit breakers:
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 27-41-91-860-006
(3) Make sure that the STAB TRIM switch on the stab trim and cabin door panel, P8-47 is in the
NORMAL position.
D. Autopilot Cutout Switch Test
SUBTASK 27-41-91-710-002
(1) Do the test of the autopilot switch, S149:
(a) Set the autopilot cutout switch to the NORMAL position.
1) Engage the autopilot.
2) Move the control column to the nose up and then to the nose down position.
3) Make sure the stabilizer leading edge moves down and then up.
(b) Set the autopilot cutout switch to the CUTOUT position.
1) Make sure the autopilot disengages.
2) Move the control column to the nose up and then to the nose down position.
3) Make sure the stabilizer leading edge does not move.
(c) Set the autopilot cutout switch to the NORMAL position.
1) Engage the autopilot.
2) Move the control column to the nose up and then to the nose down position.
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3) Make sure the stabilizer leading edge moves down and then up.
4) Disengage the autopilot.
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737-600-700-800-900 AIRCRAFT MAINTENANCE MANUAL飞机维护手册4(21)
