An aileron without power can move down a small distance. This condition is not unusual.
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 27-11-00
 ALL  ú ú 02 Page 524 ú Jan 28/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A

757
MAINTENANCE MANUAL

 S 865-108
 (3)  
Supply pressure to the center hydraulic system only (Ref. 29-11-00).

 S 215-109

 (4)  
Turn the control wheel clockwise and then counterclockwise. Make sure that the left and right ailerons operate when the control wheel is turned.

 S 865-110

 (5)
Supply pressure to the right hydraulic system only (Ref. 29-11-00).

 S 215-111

 (6)  
Turn one of the two control wheels full clockwise and then counterclockwise. Make sure that the left aileron operates when the control wheel is turned. Make sure that the right aileron does not move.

 NOTE: Because of the breakout of the wing override mechanism, the
____
 right aileron can move a small distance.

 S 825-112
 (7)  
Move the control wheel to its neutral position.

 S 865-113

 (8)  
Supply the pressure to the left and center hydraulic systems (Ref. 29-11-00).

 G.  
System Feel, Centering, and Trim Test (to determine control wheel breakout force)

 S 495-220
 (1)  
Remove the cover plate/map holder from the control wheel, if it is installed.

 S 225-219

 (2)  
Install the control wheel adapter and protractor on captain's control wheel, if not installed.

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 27-11-00
 ALL  ú ú 02 Page 525 ú Sep 28/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A

757
MAINTENANCE MANUAL

 (3)  S 225-221Center the protractor on the control wheel.
 (4)  S 865-218Supply electrical power (AMM 24-22-00/201), if it is turned off.
 S 865-229

 WARNING: TO PREVENT INJURY OR DAMAGE, MOVE ALL PERSONS AND EQUIPMENT
_______ AWAY FROM THE CONTROL SURFACES BEFORE HYDRAULIC POWER IS SUPPLIED. STAY AWAY FROM THE AREA DURING THEIR OPERATION.
 (5)  
Supply pressure to the left, center, and right hydraulic systems (AMM 29-11-00/201), if systems are not pressurized.

 S 215-222

 (6)  
Move the aileron trim switches on the aft electronic-control panel, P8, to set neutral trim.

 NOTE: The neutral trim position is achieved when the index mark on
____ the top of the control wheel is aligned with the center mark on the decal on top of the control wheel.
 S 095-223
 (7)  
Turn the control wheel clockwise and counterclockwise to shake out the control system.

 S 825-224

 (8)  
Move the aileron trim switches to reset neutral trim on the control wheel index mark if/as required.

 (9)  
Zero the protractor on captain's control wheel.

 S 825-225
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 27-11-00
 ALL  ú ú 02 Page 526 ú Sep 28/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A

757 MAINTENANCE MANUAL
 S 095-230
 (10) Measure and record the torque or tangential force to turn the control wheel to the positions below:
 NOTE: The wheel must return to neutral position +/- 0.4 units
____ (2 degrees) when released from full travel (85 degrees). Either wheel can be used for these measurements, however wheel position and wheel torque or force must be measured on the same wheel.
 (a)  
Measure breakout torque at the point of first movement of the left aileron surface in reference to the outboard flap or adjacent wing structure.

 (b)  
Measure torque or force at each position while the wheel is moving slowly past the position toward higher wheel angles.
　
中國航空網 www.k6050.com
航空翻譯 www.aviation.cn
本文鏈接地址：757 AMM 飛機維護手冊 飛行操縱 FLIGHT CONTROLS 1(74)