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757
MAINTENANCE MANUAL

 S 715-138
 (2)  
AIRPLANES WITH STAB TRIM LEVERS ON THE CONTROL STAND; do the steps that follow to make sure the position indicating system shows stabilizer movement correctly:

 (a)  
Move the STAB TRIM levers full forward and hold. 1) Make sure the stabilizer trim position indicators correctly

 follow the movement of the stabilizer until it stops. 2) Make sure the position indicators show 0 |1/4 unit of trim.

 (b)  
Release the STAB TRIM levers.

 1)  Make sure the STAB TRIM levers go to the neutral position when you release them.

 (c)  
Pull the STAB TRIM levers full aft and hold. 1) Make sure the position indicators correctly follow the movement of the stabilizer until it stops.

 2)  Make sure the stabilizer trim position indicators show 15 1/2 |1/4 units of trim.

 (d)  
Release the STAB TRIM levers.

 1)  Make sure the STAB TRIM levers go to the neutral position when you release them.
 S 735-139
 (3)  
AIRPLANES WITH ALTERNATE STAB TRIM SWITCHES ON THE CONTROL STAND; do the steps that follow to make sure the position indicating system shows stabilizer movement correctly:

 (a)  
Move the alternate stab trim switches forward and hold. 1) Make sure the stabilizer trim position indicators correctly follow the movement of the stabilizer until it stops.

 2)  Make sure the position indicators show 0.20 |0.25 units of trim.

 (b)  
Release the alternate stab trim switches.

 1)  Make sure the alternate stab trim switches go to the neutral position when you release them.

 (c)  
Move the alternate stab trim switches aft and hold.

 1)  Make sure the stabilizer trim position indicators correctly follow the movement of the stabilizer until it stops.
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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757 MAINTENANCE MANUAL
 2)  Make sure the position indicators show 15.3 |.25 units of trim.
 (d)  Release the alternate stab trim switches. 1) Make sure the alternate stab trim switches go to the neutral position when you release them.
 S 865-087
 (4)  Remove the power from the right and center hydraulic systems (AMM 29-11-00/201).
 S 865-088
 (5)  Put the RIGHT and CENTER STAB TRIM SHUTOFF valve switches on the P10 panel to CUTOUT.
 S 865-089
 (6)  Open these circuit breakers on the P11 panel and attach DO-NOT-CLOSE tags: (a) 11C12, STAB TRIM SHUTOFF LEFT (b) 11C13, STAB TRIM SHUTOFF RIGHT
 S 715-141
 (7)  AIRPLANES WITH STAB TRIM LEVERS ON THE CONTROL STAND; do the steps that follow to make sure the position indicating system does not show stabilizer movement with the RIGHT and CENTER STAB
 TRIM SHUTOFF valve switches at the CUTOUT position: (a) Slowly move the STAB TRIM levers through the full travel range and release.
 1) 2)  Make sure there is no stabilizer movement.Make sure the stabilizer trim position indicators show no stabilizer movement.
 3)  Make sure the STAB TRIM levers go to the neutral position when you release them.
 S 715-145
 (8)  AIRPLANES WITH ALTERNATE STAB TRIM SWITCHES ON THE CONTROL STAND; do the steps that follow to make sure the position indicating system does not show stabilizer movement with the RIGHT and CENTER STAB
 TRIM SHUTOFF valve switches at the CUTOUT position:

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