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F. Rudder Trim - Test
S 865-604 WARNING: KEEP PERSONS AND EQUIPMENT AWAY FROM ALL CONTROL SURFACES WHEN _______ HYDRAULIC POWER IS SUPPLIED. AILERONS, ELEVATORS, RUDDER, FLAPS, SLATS, SPOILERS, AND STABILIZER ARE FULLY POWERED SURFACES. INJURY TO PERSONS OR DAMAGE TO EQUIPMENT CAN OCCUR WHEN HYDRAULIC POWER IS SUPPLIED. (1) Supply pressure to the left, right, and center hydraulic systems (AMM 29-11-00/201).
(2) Turn the rudder trim switch on the aft electronic control panel, P8, clockwise and then counterclockwise. Hold it there until the rudder movement stops and do these checks:
(a) Make sure the rudder trim indicator shows at least 15.2 units of trim in the correct direction.
(b) Make sure the rudder position indicator moves approximately two-thirds of full scale (approximately 22 degrees).
S 215-050 (3) Operate the rudder trim switch until the indicator shows zero units of trim and do this check:
(a) Make sure the rudder is in its neutral position.
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27-21-00 ALL ú ú 08 Page 522 ú Jan 28/00 BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details. A 757 MAINTENANCE MANUAL G. Rudder Ratio Changer Modules (RRCMs) - Test S 865-051 (1) Move the left RRCM test switch on the E3 equipment shelf to TEST and do these checks: NOTE: The amber RUDDER RATIO light on the P5 panel will come ON and ____ stay ON. An amber RUDDER RATIO message will come into view on EICAS when the RRCM test switch is in its TEST position. (a) After 30 seconds, make sure all the RRCM faultballs are black. 1) If the faultballs are not black, do the RRCM BITE procedure (FIM 27-09-00/101, Fig. 106B). S 215-052 (2) Move the rudder pedals through their full travel range and do this check:
(a) Make sure the rudder position indicator moves approximately one-nineth of full scale (3.3 degrees) at full pedal travel.
S 865-053 (3) Move the left RRCM test switch to NORMAL and do these checks:
(a) Make sure the IN TEST light stays on for a maximum of 18 seconds.
(b) After 30 seconds, make sure all the RRCM faultballs are black.
1) If the faultballs are not black, do the RRCM BITE procedure (FIM 27-09-00/101, Fig. 106B). S 865-440 (4) Move the right RRCM test switch on the E4 equipment shelf to TEST and do these checks:
(a) Make sure the IN TEST light stays on for a maximum of 18 seconds.
(b) After 30 seconds, make sure all the RRCM faultballs are black.
(c) Make sure the rudder position indicator moves approximately one-nineth of full scale (3.3 degrees) at full pedal travel.
S 865-056 (5) Move the right RRCM test switch to NORMAL and do these checks:
(a) Make sure the IN TEST light stays on for a maximum of 18 seconds.
(b) After 30 seconds, make sure all the RRCM faultballs are black.
H. PCA Monitoring System - Test
(1) Do the activation procedure for the left AC bus (AMM 24-22-00/201).
(2) Push the STATUS switch on the P9 panel to show the STATUS page on the bottom EICAS display.
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27-21-00 ALL ú ú 05 Page 523 ú Jan 28/00 BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details. A
757 MAINTENANCE MANUAL
S 215-059 (3) Move the rudder pedals through their full travel range and do this check:
(a) Make sure the RUDDER PCU message does not come into view on the bottom EICAS display.
S 215-060 (4) Push the STATUS switch on the P9 panel to go out of the STATUS mode. Push the ECS/MSG switch on the P61 panel and do this check: www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：757 AMM 飞机维护手册 飞行操纵 FLIGHT CONTROLS 2
