S 865-917
 (16)
 Release the stabilizer-trim control-wheel-switches and the BRAKE BYPASS valve button.

 S 865-650

 (17)
 Put the RIGHT STAB TRIM SHUTOFF switch on the P10 panel to NORM.

 S 865-918

 (18)
 Move the stabilizer-trim control-wheel-switches up and then down to make sure the stabilizer operates correctly.

 S 865-651

 (19)
 Remove the power from the right and center hydraulic systems (Ref 29-11-00/201).

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757 MAINTENANCE MANUAL
 S 865-652
 (20) Remove electrical power if it is not necessary (Ref 24-22-00/201).
 TASK 27-41-00-715-644
 7.  Stabilizer Trim Shutoff Switches Test_____________________________________
 NOTE: This is a scheduled maintenance task.
____
 A. References
 (1)  
24-22-00/201, Electrical Power - Control

 (2)  
29-11-00/201, Main (Left, Right, and Center) Hydraulic Systems

 B.
Stabilizer Trim Shutoff Switches Test

 S 865-083
 (1)  Supply electrical power (Ref 24-22-00/201).
 S 865-653
 WARNING: KEEP PERSONS AND EQUIPMENT AWAY FROM ALL CONTROL SURFACES
_______ WHEN HYDRAULIC POWER IS SUPPLIED. AILERONS, ELEVATORS, RUDDER, FLAPS, SLATS, SPOILERS, AND STABILIZER ARE FULLY POWERED SURFACES. INJURY TO PERSONS OR DAMAGE TO EQUIPMENT CAN OCCUR WHEN HYDRAULIC POWER IS SUPPLIED.
 (2)  
Pressurize the right and center hydraulic systems
 (Ref 29-11-00/201).

 S 215-919

 (3)  
Make sure that these circuit breakers on the overhead panel, P11, are closed:

 (a)  
11C12, STAB TRIM SHUTOFF LEFT

 (b)  
11C13, STAB TRIM SHUTOFF RIGHT

 S 865-920
 (4)  Put the RIGHT and CENTER STAB TRIM SHUTOFF switches on the P10 panel to CUTOUT.
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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A

757
MAINTENANCE MANUAL

 S 715-922
 (5)  AIRPLANES WITH STAB TRIM LEVERS ON THE CONTROL STAND;
 do the steps that follow to make sure the stabilizer operates
 correctly for the RIGHT and CENTER STAB TRIM SHUTOFF switches at the
 CUTOUT position:
 (a) Move the STAB TRIM control levers full forward and full aft
 slowly.
 1) Make sure that the stabilizer does not move.
 (b) Let the STAB TRIM control levers go back to neutral position.
 S 715-923
 (6)  AIRPLANES WITH ALTERNATE STAB TRIM SWITCHES ON THE CONTROL STAND;
 do the steps that follow to make sure the stabilizer operates
 correctly for the RIGHT and CENTER STAB TRIM SHUTOFF switches at the
 CUTOUT position:
 (a) Move the alternate stab trim switches full forward and full aft
 slowly.
 1) Make sure that the stabilizer does not move.
 (b) Let the alternate stab trim switches go to the neutral
 position.
 S 865-924
 (7)  Put the RIGHT STAB TRIM SHUTOFF switch on the P10 panel to NORM.
 S 715-926
 (8)  AIRPLANES WITH STAB TRIM LEVERS ON THE CONTROL STAND;
 do the steps that follow to make sure the stabilizer moves correctly
 for the RIGHT STAB TRIM SHUTOFF switch at the NORM position and the
 CENTER STAB TRIM SHUTOFF switch at the CUTOUT position:
 (a) Move the STAB TRIM control levers full forward and hold.
 1) Make sure that the stabilizer leading edge moves up.
 (b) Let the STAB TRIM control levers go back to neutral position.
 S 715-927
 (9)  AIRPLANES WITH ALTERNATE STAB TRIM SWITCHES ON THE CONTROL STAND;
 do the steps that follow to make sure the stabilizer moves correctly
　
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