S 984-037
(10)
Push the left or right YAW DAMPER switch/light on P5 and make sure that ON comes on.
S 284-038
(11)
Make sure that the applicable YAW DAMPER L or R INOP light is off.
S 984-039
(12)
For left servo, put the YAW DMPR test switch on P61 in the L position, then put the switch back to the center.
S 284-066
(13)
Make sure that the YAW DAMPER L INOP light comes on.
S 284-065
(14)
Make sure that the rudder position indicator on the lower EICAS display shows this sequence of rudder movement in less than 10 seconds:
(a)
The rudder moves approximately 3 degrees trailing edge right.
(b)
The rudder moves approximately 3 degrees trailing edge left.
(c)
The rudder goes back to the center.
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757 MAINTENANCE MANUAL
(d) Make sure that the YAW DAMPER L INOP light goes off in less than 15 seconds after you put the switch back to center.
S 984-040
(15)
For the right servo, put the YAW DMPR test switch on P61 in the R position, then put the switch back to center.
S 284-041
(16)
Make sure that the YAW DAMPER R INOP light comes on.
S 284-064
(17)
Make sure that the rudder position indicator on the lower EICAS display shows this sequence of rudder movement in less than 10 seconds:
(a)
The rudder moves approximately 3 degrees trailing edge right.
(b)
The rudder moves approximately 3 degrees trailing edge left.
(c)
The rudder goes back to the center.
(d)
Make sure that the YAW DAMPER R INOP light goes off in less than 15 seconds after you put the switch back to center.
S 284-043
(18)
AIRPLANES WITH YDM 285T0013-101 THRU -121; Make sure that all faultballs on the faceplates of the two yaw damper modules show black.
S 284-044
(19)
AIRPLANES WITH YDM 285T0013-122 THRU -126; Push the DISPLAY button on the left and right yaw damper modules and make sure that the message NO FAULTS shows on the two yaw damper modules.
G. Inspect the valves for hydraulic leaks.
S 984-047
(1)
Put the L, C and R FLT CONTROL SHUTOFF switches in the OFF position.
(2)
Put the STAB TRIM switches in the CUT OUT position.
S 864-049
(3)
Open these circuit breakers on the P11 panel and attach DO-NOT-CLOSE tags:
(a)
11H17, FLT CONT SHUTOFF TAIL LEFT
(b)
11H18, FLT CONT SHUTOFF TAIL CENTER
(c)
11H28, FLT CONT SHUTOFF TAIL RIGHT
S 984-048
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757 MAINTENANCE MANUAL
S 864-069
WARNING: MAKE SURE PERSONNEL STAY A MINIMUM OF 6 FEET AWAY FROM THE
_______ VERTICAL STABILIZER WHEN THE HF SYSTEM TRANSMITS. RF ENERGY FROM THE HF COMMUNICATION ANTENNA CAN CAUSE INJURIES TO PERSONNEL.
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