EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. AIRPLANES WITH 10-62253 ú
 22-12-01
 YAW DAMPER COUPLER  ú ú 01 Page 129 ú Jul 12/01 
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details. 
A 
737-300/400/500MAINTENANCE MANUAL
 ~............................................................................... | FAULT MESSAGE/CORRECTIVE ACTION (TABLE 101) | ................................................................................. | YDC Fault | YDC Fault | Corrective Action | | Message | Detail 1 | | .................................................................................
 | LRRA  | msg. no.  | Possible Causes:  | 
 | miscompr  | 22-21041  | Radio Altimeter 1 and Radio Altimeter 2 radio height  | 
 |  |  | disagree  | 
 |  |  | Yaw Damper Coupler  | 
 |  |  |  | 
 |  |  | Corrective Action:  | 
 |  |  | 1. Troubleshoot Radio Altimeter 1 and Radio  | 
 |  |  |  Altimeter 2.  | 
 |  |  | 2. Do a wiring check between D295 and Radio  | 
 |  |  |  Altimeter 1  | 
 |  |  |  D295 pin 13 and D101B pin 12  | 
 |  |  |  D295 pin 21 and D101B pin 46  | 
 |  |  |  D295 pin 24 and D101B pin 47  | 
 |  |  | 3. Do a wiring check between D295 and Radio  | 
 |  |  |  Altimeter 2  | 
 |  |  |  D295 pin 39 and D103B pin 12  | 
 |  |  |  D295 pin 22 and D103B pin 23  | 
 |  |  |  D295 pin 54 and D103B pin 22  | 
 |  |  | 4. If the problem is not corrected, replace the  | 
 |  |  |  Yaw Damper Coupler (AMM 22-12-31/401).  |
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. AIRPLANES WITH 10-62253 ú
 22-12-01
 YAW DAMPER COUPLER  ú ú 01 Page 130 ú Jul 12/01 
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details. 
 
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