3. Lower Gimbal Wear Limits (Fig. 602)
G10933 A06665
516 Lower Gimbal Wear Limits
Feb 01/74 Figure 602 (Sheet 1) BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 27-41-81 Page 603
Lower Gimbal Wear Limits 500
27-41-81 Page 604 Figure 602 (Sheet 2) BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. Feb 20/92
STABILIZER TRIM CUTOUT SWITCHES - REMOVAL/INSTALLATION
1. General
A. The following removal and installation procedure is applicable to both the main electric cutout switch and the autopilot cutout switch.
2. Remove Stabilizer Main Electric or Autopilot Cutout Switches (Fig. 401)
A. Open STABILIZER TRIM CONTROL and STABILIZER TRIM ACTUATOR circuit breakers on panel P6.
B. Remove lower right access panel from control stand.
C. Disconnect pushrod (cable on some airplanes) and remove boot from switch.
D. Remove bracket screws.
E. Remove switch mounting screws.
F. Disconnect electrical connector and remove switch.
3. Install Stabilizer Main Electric or Autopilot Cutout Switches
A. Check that STABILIZER TRIM CONTROL and STABILIZER TRIM ACTUATOR circuit breakers on panel P6 are open.
B. Position switch and install switch mounting screws.
C. Connect electrical connector.
D. Install bracket screws.
E. Install boot and pushrod (cable on some airplanes) to switch.
F. Position cutout switch lever on control stand to NORMAL then to CUTOUT. Check for switch operation and adjust pushrod (cable on some airplanes) as required.
G. Test switch (Ref 27-41-91 A/T).
H. Install access panel.
500
Jun 20/88 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 27-41-91 Page 401
G42430
Stabilizer Trim Cutout Switch Installation 500
27-41-91Page 402 Figure 401 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. Jun 20/88
STABILIZER TRIM CUTOUT SWITCHES - ADJUSTMENT/TEST
1. Stabilizer Trim Cutout Switch Test
A. General
(1) Testing for the stabilizer trim main electric cutout switch is covered in following paragraph
B. Testing for the stabilizer trim autopilot cutout switch is covered in paragraph C.
B. Stabilizer Trim Main Electric Cutout Switch Test
(1)
Provide electrical power.
(2)
Close stabilizer trim actuator and stabilizer trim control circuit breakers on panel P6.
(3)
Position main electric cutout switch to NORMAL.
(4)
Actuate stabilizer trim switch to AIRPLANE NOSE UP and then to AIRPLANE NOSE DOWN.
(5)
Check that stabilizer moves in proper direction and that stabilizer trim light illuminates during operation.
(6)
Position main electric cutout switch to CUTOUT.
(7)
Actuate stabilizer trim switch to AIRPLANE NOSE UP, and then to AIRPLANE NOSE DOWN.
(8)
Check that system does not operate and stabilizer trim light does not illuminate.
(9)
Restore main electric cutout switch to NORMAL. Repeat steps (4) and (5).
(10)
Remove electrical power, if no longer required.
500
Feb 15/73 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 27-41-91 Page 501
C. Stabilizer Trim Autopilot Cutout Switch Test
(1)
Provide electrical power.
(2)
Close all autopilot circuit breakers on panel P6.
(3)
Position stabilizer trim autopilot cutout switch to NORMAL.
(4)
Engage autopilot and tilt control column in nose up and then in nose down position.
(5)
Check that stabilizer moves in proper direction.
(6)
Position stabilizer trim autopilot cutout switch to CUTOUT. Check that autopilot disengages.
(7)
Tilt control column in nose up and then in nose down position.
(8)
Check that system does not operate.
(9)
Restore stabilizer trim autopilot cutout switch to NORMAL. Repeat steps (4) and (5).
(10)
Disengage autopilot.
(11)
Remove electrical power, if no longer required.
500
27-41-91 Page 502 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. Feb 15/73
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