(a)
Make sure that the left aileron moves down and the right aileron moves up.
(b)
Make sure that the ailerons move full travel in less than one second.
S 225-127
(4)
Turn the control wheel from full counterclockwise to neutral in less than 1/2 second and do the checks that follow:
(a)
Make sure that the ailerons are aligned with the wing. Keep a record of the difference.
NOTE: A straight edge can be used to measure this
____ dimension. Put the straight edge across the aileron inboard-trailing-edge top surface and the main flap outboard-trailing-edge top surface. Measure the vertical distance between the control surfaces to find the neutral position. This distance must not be more than 0.12 inch (3 mm).
(b) Make sure that the ailerons move to neutral in less than one second.
S 225-128
(5)
Do the above two steps again when the control wheel is turned counterclockwise. The left aileron will move up and the right aileron will move down.
(6)
Remove the power from the center hydraulic system (Ref. 29-11-00).
S 865-129
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27-11-00
ALL ú ú 02 Page 531 ú Jan 28/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757
MAINTENANCE MANUAL
(7) S 225-130Measure the distance between the aileron inboard-trailing-edge top surface and the main flap outboard-trailing-edge top surface. Subtract this dimension from the record you kept. Make sure that the difference is not more than 0.06 inch (1.5 mm).
(8) S 225-131Make sure that the aileron outboard-trailing-edge aligns with the wing tip (use a tolerance of 0.5 inch (12.7 mm)).
(9) S 215-132Turn the control wheel clockwise and then counterclockwise. Make sure that the ailerons move correctly when the control wheel is turned.
S 865-133
(10)
Supply pressure to the center hydraulic system (Ref. 29-11-00).
S 865-134
(11)
Remove the power from the left and right hydraulic systems (Ref. 29-11-00).
S 225-135
(12)
Measure the distance between the aileron inboard-trailing- edge top surface and the main flap outboard-trailing-edge top surface. Subtract this dimension from the record you kept. Make sure that the difference is not more than 0.06 inch (1.5 mm).
S 225-136
(13)
Make sure that the aileron outboard-trailing-edge aligns with the wing tip (use a tolerance of 0.5 inch (12.7 mm)).
S 215-137
(14)
Turn the control wheel clockwise and then counterclockwise. Make sure that the ailerons move correctly when the control wheel is turned.
S 865-138
(15)
Supply pressure to the left and right hydraulic system (Ref. 29-11-00).
(16)
Make sure that the aileron trim is in neutral.
S 825-139
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ALL ú ú 02 Page 532 ú Jan 28/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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757 MAINTENANCE MANUAL
S 225-140
(17) Turn the control wheel clockwise and then counterclockwise. Make sure that the ailerons move up and down 20 | 1 degrees or 8.68 |0.44 inches.
NOTE: Use a bubble protractor or scale to measure the aileron
____
movement.
I. Aileron Wing Override Test
S 865-141
(1)
Retract the trailing edge flaps.
S 865-142
(2)
Do the deactivation procedure for the flaps (Ref. 27-51-00).
S 865-143
WARNING: TO PREVENT INJURY OR DAMAGE, REMOVE THE POWER FROM THE LEFT,
_______ RIGHT, AND CENTER HYDRAULIC SYSTEMS BEFORE YOU DO THE AILERON OVERRIDE TEST.
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