one-half of the inspection hole for the input rod. 2) Make sure the rudder position did not change.
(g)
Do these steps to examine the input rod adjustment:
1) Use some new tape on the tail cone and make a mark of this "low speed" rudder position.
NOTE: Use the left side of the rudder trailing edge.
____
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
27-21-00
ALL ú ú 04 Page 542 ú Jan 28/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757
MAINTENANCE MANUAL
2) Move the left RRCM test switch 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) 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. 3) Move the input levers for the top and bottom PCAs fully clockwise at the same time.
NOTE: This is to release unwanted hydraulic pressure and
____ will let the rudder position become stable.
4) Make a mark on the tape for this "high speed" rudder position (use the left side of the rudder trailing edge). 5) Make sure that the "low speed" mark is no more than 0.05 inch away from the "high speed" mark. 6) If the distance between the marks is more than 0.05 inch
(1.27 mm), do the "Rudder Ratio Changer System -Adjustment" group of steps again.
WARNING: DO NOT MOVE THE INPUT LINKAGE WHEN YOU INSTALL THE
_______ OUTBOARD (RIGHT) INPUT ROD. IF THE INPUT LINKAGE MOVES, THE RUDDER WILL MOVE QUICKLY AND CAN CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
(h) Adjust the outboard (right) input rod until you can easily install the bolt with a light force and do these steps:
NOTE:____ Do not move the PCA input levers when you do the adjustment. The rudder trailing edge will move, and the rudder datum position will change.
(i) (j) 1) Tighten the jamnut for the outboard input rod. 2) Connect the outboard input rod to the ratio changer crank. 3) Make sure you can see control rod threads in at least one-half of the inspection hole for the input rod.Remove the tape from the tail cone.Move the left RRCM test switch to NORMAL and do these checks: 1) Make sure the IN TEST light stays on for a maximum of 18 seconds.
2) After 30 seconds, make sure all the RRCM faultballs are black.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
27-21-00
ALL ú ú 05 Page 543 ú Jan 28/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
(k)
(l)
(m)
(n)
(o)
(p)
A
757 MAINTENANCE MANUAL
Move the input levers for the top and bottom PCAs fully clockwise at the same time.
NOTE: This is to release unwanted hydraulic pressure and will
____ let the rudder position become stable.
Put new tape on the tail cone index plate and make a mark of the rudder position (use the left rudder trailing edge).Move the left RRCM test switch 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.
1) Make sure the IN TEST light stays on for a maximum of than 18 seconds. 2) After 30 seconds, make sure all the RRCM faultballs are
black.Move the input levers for the top and bottom PCAs fully clockwise at the same time.
NOTE: This is to release unwanted hydraulic pressure and will
____ let the rudder position become stable.
Make a mark of the rudder position on the tape.
NOTE: Use the left side of the rudder trailing edge.
____
Do these steps if the distance between the marks is more than 0.05 inch (1.27 mm): 1) 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. 2) Loosen the jamnuts on the top end of the outboard (right) input rod. Keep a loose fit on the top rod end bolt.
中国航空网 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(11)
