S 225-442
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A

757 MAINTENANCE MANUAL
 S 225-444
 (33)
 Measure and write down dimension B of the stabilizer jackscrew.

 S 225-445

 (34)
 Calculate the difference in the above two measurements.

 (a)  
Make sure that the difference is between 9.41 and 11.99 inches (239.0-304.5 mm).

 S 865-446
 (35)
 Remove the pressure from the pitot lines (Ref 34-11-00).

 S 865-447

 (36)
 Remove the power from the right and center hydraulic systems (Ref 29-11-00).

 Q.
Secondary Brake Reaction Torque Test (Fig. 502)

 S 865-448
 (1)
Pressurize the right and center hydraulic systems (Ref 29-11-00).

 S 865-449

 (2)
Put the RIGHT STAB TRIM SHUTOFF switch on the P10 panel to NORM.

 S 865-450

 (3)
Put the CENTER STAB TRIM SHUTOFF switch on the P10 panel to CUTOUT.

 S 865-451

 (4)  
Use the captain's or first officer's stabilizer-trim control-wheel-switches to move the stabilizer at least 4 units of trim from the ends of the travel range.

 S 865-452

 (5)  
Press and hold the BRAKE BYPASS valve button on the right stabilizer trim control module.

 NOTE: The button is on the bottom of the unit.
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MAINTENANCE MANUAL

 (6)  S 865-453Move the stabilizer-trim control-wheel-switches full travel in the airplane nose up direction (stabilizer leading edge down) and hold for approximately 10 seconds. (a) Make sure the stabilizer does not move.
 (7)  S 865-454Release the stabilizer-trim control-wheel-switches and then release the BRAKE BYPASS valve button.
 (8)  S 865-455Move the stabilizer-trim control-wheel-switches full travel in one direction and then in the other direction. (a) Make sure the stabilizer-trim control-wheel-switches operate correctly.
 (9)  S 865-456Put the RIGHT STAB TRIM SHUTOFF switch on the P10 panel to CUTOUT.
 S 865-457

 (10)
 Put the CENTER STAB TRIM SHUTOFF switch on the P10 panel to NORM.

 S 865-458

 (11)
 Press and hold the BRAKE BYPASS valve button on the left control module.

 S 865-459

 (12)
 Move the stabilizer-trim control-wheel-switches full travel in the airplane nose down direction (stabilizer leading edge up) and hold for approximately 10 seconds.

 (a)
Make sure the stabilizer does not move.

 S 865-460
 (13) Release the stabilizer-trim control-wheel-switches and release the BRAKE BYPASS valve button.
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757 MAINTENANCE MANUAL
 S 865-461
 (14)
 Move the stabilizer-trim control-wheel-switches full travel in one direction and then in the other direction.

 (a)  
Make sure the stabilizer-trim control-wheel-switches operate correctly.

 R.
Put the Airplane Back to Its Usual Condition

 S 865-742
 (1)  
Remove the power from the right and center hydraulic systems (Ref 29-11-00).

 S 865-743

 (2)  
Remove the DO-NOT-CLOSE tags and close these circuit breakers on the P11 panel:

 (a)  
11C6, CSEU 1L AC
 or FLT CONT ELEC 1L AC

 (b)  
　
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