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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757
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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A
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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本文链接地址：757 AMM 飞机维护手册 飞行操纵 FLIGHT CONTROLS 4(41)
