(2)
The system test also makes sure that these functions operate correctly.
(a)
Channel fault disengagement
(b)
Disengage relay operation
(c)
Servo loop fault detection
(d)
Monitor Operation
B. References
(1)
24-22-00/201, Electrical Power - Control
(2)
27-21-00/501, Rudder and Rudder Trim Control System
(3)
27-61-00/201, Spoiler/Speedbrake Control System
(4)
29-11-00/201, Pressurize/Depressurize Main Hydraulic System
(5)
31-41-00/501, Engine Indication and Crew Alerting System
(6)
32-09-02/201, Air/Ground Relays
(7)
33-16-00/501, Master Dim and Test
(8)
34-12-00/501, Air Data Computing System
(9)
34-21-00/501, Inertial Reference System
C. Access
(1) Location Zones
119/120 Main Equipment Center
211/212 Control Cabin
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757 MAINTENANCE MANUAL
(2) Access Panel
119BL Main Equipment Center
D. Prepare for test.
S 715-028
(1) Do the Prepare for Test procedures in the Yaw Damper System
Operation Test.
E. Power-Up Test
S 985-029
(1) Push the left and right YAW DAMPER switch/lights on the yaw damper panel and make sure ON is on.
S 845-378
WARNING: DO THE DEACTIVATION PROCEDURE FOR THE SPOILERS OR MOVE ALL
_______ PERSONS AND EQUIPMENT AWAY FROM THE SPOILER PANELS. THE SPOILERS CAN RETRACT QUICKLY AND CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
(2)
Do the deactivation procedure for the spoilers (Ref 27-61-00) or move all persons and equipment away from the spoiler panels.
S 865-030
(3)
Open for 1 second and close these circuit breakers on the P11 panel:
(a)
11C6, FLT CONT ELEC 1L AC
(b)
11C8, FLT CONT ELEC 2L AC
(c)
11G17, FLT CONT ELEC 1R AC
(d)
11G27, FLT CONT ELEC 2R AC
S 285-031
(4)
Make sure that the two YAW DAMPER INOP (L, R) lights on the overhead panel, P5, come on momentarily yellow.
S 285-032
(5)
Stop for a minimum of 30 seconds then make sure that the two YAW DAMPER INOP lights go off.
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S 985-033
(6)
Push the RESET button on the left and right yaw damper modules.
S 865-034
(7)
Stop for a minumum of 30 seconds, then make sure that the YAW DAMPER INOP L, R lights are off.
S 285-035
(8)
Make sure that all faultballs on the yaw damper module front panel show black.
F. Power Supply Interface Test
S 845-364
WARNING: DO THE DEACTIVATION PROCEDURE FOR THE SPOILERS OR MOVE ALL
_______ PERSONS AND EQUIPMENT AWAY FROM THE SPOILER PANELS. THE SPOILERS CAN RETRACT QUICKLY AND CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
(1)
Do the deactivation procedure for the spoilers (Ref 27-61-00) or move all persons and equipment away from the spoiler panels.
S 865-037
(2)
Open these circuit breakers on the P11 panel:
(a)
11G17, FLT CONT ELEC 1R AC
(b)
11G27, FLT CONT ELEC 2R AC
S 285-038
(3)
Make sure that the YAW DAMPER INOP R light is on.
S 865-039
(4)
Close this circuit breaker on the P11 panel:
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