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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757 MAINTENANCE MANUAL
 (d)  11G27, CSEU 2R AC
 or FLT CONT ELEC 2R AC

 S 865-967
 (3)  
Put the RIGHT and CENTER STAB TRIM SHUTOFF switches on the P10 panel to NORM.

 S 865-968

 (4)  
Remove electrical power (Ref 24-22-00/201).

 S 415-969

 (5)  
Close the forward stabilizer compartment access door, 311AL (Ref 06-42-00/201).

 TASK 27-41-00-715-680
 11. AIRPLANES WITH ALTERNATE STAB TRIM SWITCHES ON THE CONTROL STAND;_________________________________________________________________ Horizontal Stabilizer Alternate Electric Trim System - Operational Check________________________________________________________________________
 A. General
 (1)  
The operational check of the stabilizer alternate electric trim system is done without the use of ground support equipment. The test lets you monitor stabilizer alternate electric trim operation and makes sure the stabilizer has smooth and free movement.

 B.
References

 (1)  
24-22-00/201, Electrical Power - Control

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

 C.
Access

 (1)  
Location Zones
 211/212 Control Cabin

 D.
Alternate-Electrical Operation Test

 S 865-681
 (1)  Supply electrical power (Ref 24-22-00/201).
 S 865-683
 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 865-705

 (3)  
Make sure that the L, R, and C FLT CONTROL SHUTOFF switches on the right side panel, P61, are ON.

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757
MAINTENANCE MANUAL

 (4)  S 865-684Put the CENTER STAB TRIM SHUTOFF switch on the P10 panel to the CUTOUT position.
 (5)  S 215-685Make sure that the RIGHT STAB TRIM SHUTOFF switch on the P10 panel is at the NORM position.
 (6)  S 215-686Make sure this circuit breaker on the P11 panel is closed: (a) 11B19, ALT STAB TRIM
 (7)  S 715-687Move the alternate stab trim switches forward (airplane nose down). (a) Make sure the stabilizer moves in the airplane nose down direction (stabilizer leading edge up).
 (8)  S 865-688Put the RIGHT STAB TRIM SHUTOFF switch on the P10 panel to CUTOUT while the stabilizer moves. (a) Make sure the stabilizer stops in one second.
 (9)  S 865-689Put the RIGHT STAB TRIM SHUTOFF switch on the P10 panel to the NORM position. (a) Make sure the stabilizer starts to move in one second.
 S 715-690

 (10)
 Release the alternate stab trim switches.

 (a)  
Make sure the stabilizer stops.

 S 865-691
 (11)
 Put the RIGHT STAB TRIM SHUTOFF switch on the P10 panel to the CUTOUT position.

 S 865-692

 (12)
 Put the CENTER STAB TRIM SHUTOFF switch on the P10 panel to the NORM position.

 S 715-693

 (13)
 Move the alternate stab trim switches aft (airplane nose up).

 (a)  
Make sure the stabilizer moves in the airplane nose up direction (stabilizer leading edge down).

 S 865-694
 (14)
 Put the CENTER STAB TRIM SHUTOFF switch on the P10 panel to the CUTOUT position while the stabilizer moves.

 (a)  
Make sure the stabilizer stops in one second.

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