S 285-212

 (10)
 Make sure that the Rudder Position Indicator, on the Lower EICAS Display - Status Page, shows no rudder movement for 10 seconds.

 S 985-213

 (11)
 Push the DISPLAY switch on the Left YAW DAMPER MODULE.

 S 285-214

 (12)
 Make sure that these fault messages are not shown on the LEFT YAW DAMPER MODULE fault display:

 (a)  
AIRGND 1

 (b)  
AIRGND 1/2

 (c)  
AIRGND 2

 S 985-215
 (13)
 Push the DISPLAY SWITCH on the Right YAW DAMPER module.

 S 285-217

 (14)
 Make sure that these fault messages are not shown on the Right YAW DAMPER MODULE fault display:

 (a)  
AIRGND 1

 (b)  
AIRGND 1/2

 (c)  
AIRGND 2

 S 865-216
 (15) Open these circuit breakers on the P11 panel:
 (a)  11A18, YAW DAMPER LEFT
 (b)  11C6,  CSEU 1L AC
 or
 FLT CONT ELEC 1L AC
 (c)  11C8,  CSEU 2L AC
 or
 FLT CONT ELEC 2L AC

 S 865-218
 (16) Close this circuit breaker on the P11 panel:
 (a)  11C30, LANDING GEAR POS SYS 1
 S 285-219
 (17)
 Make sure that the YAW DAMPER-R INOP light, on the Yaw Damper Control Panel (P5), is off.

 S 285-389

 (18)
 Make sure that the "L YAW DAMPER " message is displayed on the Upper EICAS Display.

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 S 985-220
 (19)
 Stop for 2 seconds minimum and then push the DISPLAY switch on the Right YAW DAMPER MODULE.

 S 285-221

 (20)
 Make sure that this fault message is shown on the Right YAW DAMPER MODULE fault display:

 (a) AIRGND 2
 S 985-222
 (21)
 Put the COMPUTER Select switch, on the EICAS Display Select Panel (P9), in the L position.

 S 985-391

 (22)
 Push the ECS/MSG switch on the EICAS Maintenance Panel (P61).

 S 285-223

 (23)
 Make sure that the "YAW DAMPER" message is shown on the Lower EICAS Display - Maintenance Page.

 S 985-224

 (24)
 Put the COMPUTER Select switch, on the EICAS Display Select Panel, in the R position.

 S 285-225

 (25)
 Make sure that the "YAW DAMPER" message is shown on the Lower EICAS Display - Maintenance Page.

 S 865-226

 (26)
 Open this circuit breaker on the P11 panel:

 (a) 11C30, LANDING GEAR POS SYS 1
 S 985-227
 (27)
 Stop for 10 seconds minimum and then push the DISPLAY switch on the Right YAW DAMPER MODULE.

 S 285-228

 (28)
 Make sure that these fault messages are not shown on the Right YAW DAMPER MODULE Fault Display:

 (a)
AIRGND 1

 (b)
AIRGND 1/2

 (c)
AIRGND 2

 S 865-229
 (29) Close these circuit breakers on the P11 panel:
 (a) 11A18, YAW DAMPER LEFT
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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 ALL  ú ú 10 Page 533 ú May 20/98
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MAINTENANCE MANUAL

 (b)  11C6,  CSEU 1L AC
 or
 FLT CONT ELEC 1L AC
 (c)  11C8,  CSEU 2L AC
 or
 FLT CONT ELEC 2L AC

 S 865-230
 (30) Close this circuit breaker on the P11 panel:
 (a) 11C30, LANDING GEAR POS SYS 1
 S 865-231
 (31) Open these circuit breakers on the P11 panel:
 (a)
11F34, YAW DAMPER RIGHT

 (b)  
11G17, CSEU 1R AC or FLT CONT ELEC 1R AC

 (c)  
　
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