S 865-076

 (3)  
Close this circuit breaker on the P11 panel:

 (a)  11A18, YAW DAMPER LEFT
 S 285-340
 (4)  
Make sure that the YAW DAMPER INOP L light goes off and the L YAW DAMPER message is not shown.

 S 865-077

 (5)  
Open this circuit breaker on the P11 panel:

 (a)  11F34, YAW DAMPER RIGHT
 S 285-078
 (6)  
Make sure that the YAW DAMPER INOP R light is on and that the upper EICAS display shows the R YAW DAMPER message.

 S 865-079

 (7)  
Close this circuit breaker on the P11 panel:

 (a)  11F34, YAW DAMPER RIGHT
 S 285-341
 (8)  Make sure that the YAW DAMPER INOP R light goes off and the R YAW DAMPER message is not shown.
 I. Air/Ground System Interface Test
 S 865-379
 WARNING: PREPARE THE SAFETY-SENSITIVE SYSTEMS FOR THE AIR MODE BEFORE
_______ YOU OPEN THE AIR/GROUND CIRCUIT BREAKERS. IN THE AIR MODE, MANY OF THE AIRPLANE SYSTEMS CAN OPERATE AND CAUSE INJURIES TO PERSONS AND DAMAGE TO EQUIPMENT.
 (1)  Prepare the safety sensitive systems for air mode simulation (AMM 32-09-02/201).
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 S 285-430
 (2)  Make sure that the AOA Vanes are set to equal postions.
 NOTE: If the AOA Vane's are not equal:
____ -The "YAW DAMPER" EICAS maintenance message will show.
 -A "DADC" YSM fault will occur.
 S 985-084
 (3)  
Push the ECS/MSG switch on EICAS maintenance panel on P61.

 S 285-394

 (4)  
Make sure that the YAW DAMPER maintenance message is not displayed on the lower EICAS display.

 S 865-080

 (5)  
Open these circuit breakers on the P11 panel (all within 2 seconds) and attach DO-NOT-CLOSE tags:

 (a)  
11C30, LANDING GEAR POS SYS 1

 (b)  
11S19, AIR/GND SYS 2

 S 985-081
 (6)  
Put the YAW DMPR test switch on the P61 panel in the L position, then the R position, and then put the switch back to the center position.

 S 285-082

 (7)  
Make sure that the YAW DAMPER INOP L, R light on the overhead panel, P5, go off.

 S 285-083

 (8)  
Make sure that the rudder position indicator in the lower EICAS display shows no rudder movement for 10 seconds.

 S 285-342

 (9)  
Make sure that the AIR/GRD faultball shows black on the right and left yaw damper modules.

 S 865-085

 (10)
 Open these circuit breakers on the P11 panel:

 (a)  
11A18, YAW DAMPER LEFT

 (b)  
11C6, FLT CONT ELEC 1L AC

 (c)  
11C8, FLT CONT ELEC 2L AC

 S 865-086
 (11) Close this circuit breaker on the P11 panel.
 (a)  11C30, LANDING GEAR POS SYS 1
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 S 285-087
 (12)
 Make sure that the YAW DAMPER INOP R light on the P5 panel is off.

 S 285-088

 (13)
 Stop for a minimum of 2 seconds and make sure that the AIR/GRD faultball on the right yaw damper module is yellow.

 S 285-089

 (14)
 Make sure that the YAW DAMPER maintenance message is shown on the lower EICAS display.

 S 865-090

 (15)
 Open this circuit breaker on the P11 panel and attach a DO-NOT-CLOSE tag:

 (a) 11C30, LANDING GEAR POS SYS 1
 S 285-091
 (16)
 Stop for a minimum of 10 seconds then make sure the AIR/GRD faultball on the right yaw damper module is black and the YAW DAMPER maintenance message is not shown.
　
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