S 285-232
 (32)
 Make sure that the YAW DAMPER-L INOP light, on YAW DAMPER Control Panel, is off.

 S 285-392

 (33)
 Make sure that the "R YAW DAMPER" message is shown on the Upper EICAS Display.

 S 985-233

 (34)
 Stop for 2 seconds and then push the DISPLAY switch on the Left YAW DAMPER MODULE.

 S 285-234

 (35)
 Make sure that this message is shown on the Left YAW DAMPER MODULE fault display:

 (a) AIRGND 2
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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MAINTENANCE MANUAL

 S 285-235
 (36)
 Make sure that the "YAW DAMPER" message is shown on the Lower EICAS Display - Maintenance Page.

 S 865-236

 (37)
 Open this circuit breaker on the P11 panel:

 (a) 11C30, LANDING GEAR POS SYS 1
 S 985-237
 (38)
 Stop for 10 seconds and then push the DISPLAY switch on the Left YAW DAMPER MODULE.

 S 285-238

 (39)
 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 865-239
 (40) Close these circuit breakers on the P11 panel:
 (a)
11F34, YAW DAMPER RIGHT

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

 (c)  
11G27, CSEU 2R AC
 or
 FLT CONT ELEC 2R AC

 (d)
11S19, AIR/GND SYS 2

 S 985-240
 (41)
 Stop for a minimum of 2 seconds and then push the DISPLAY switch on the Left YAW DAMPER MODULE.

 S 285-241

 (42)
 Make sure that this message is shown on the Left YAW DAMPER MODULE fault display:

 (a) AIRGND 1
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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757 MAINTENANCE MANUAL
 S 985-242
 (43)
 Push the DISPLAY switch on the Right YAW DAMPER MODULE.

 S 285-243

 (44)
 Make sure that this fault message is displayed on the RIght YAW DAMPER MODULE Fault Display:

 (a) AIRGND 1
 S 865-244
 (45) Open this circuit breaker on the P11 panel:
 (a) 11S19, AIR/GND SYS 2
 S 985-246
 (46)
 Stop for a minimum of 10 seconds and then then push the DISPLAY switch on the Left YAW DAMPER MODULE.

 S 285-245

 (47)
 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 865-373
 (48)
 Push the DISPLAY button on the Right YAW DAMPER MODULE.

 S 285-393

 (49)
 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 865-247
 (50) Close these circuit breakers on the P11 panel:
 (a) 11C30, LANDING GEAR POS SYS 1
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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757 MAINTENANCE MANUAL
 (b)  11S19, AIR/GND SYS 2
 S 865-354
 (51) Put the safety sensitive systems back to their initial conditions (Ref 32-09-02/201).
　
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