................................................................................. | YDC YD | msg. no. | Possible Causes: | | fault | 22-21001 | 1. Yaw Damper Coupler | | | | | | | | Corrective Action: | | | | 1. Supply hydraulic power (AMM 29-15-00/201). | | | | 2. Do the Yaw Damper Coupler - Adjustment/Test | | | | (AMM 22-12-32/501). | | | | 3. If the problem is not corrected, replace the | | | | Yaw Damper Coupler (AMM 22-12-31/401). | ................................................................................. | YDC PR | msg. no. | Possible Causes: | | fault | 22-21002 | 1. Yaw Damper Coupler | | | | | | | | Corrective Action: | | | | 1. Do the Yaw Damper Coupler - Adjustment/Test | | | | (AMM 22-12-32/501). | | | | 2. 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 02 Page 107 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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.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 | | .................................................................................
| YD sol | msg. no. | Possible Causes: |
| fault | 22-21003 | 1. Yaw Damper Engage Solenoid |
| | | 2. Yaw Damper Coupler |
| | | |
| | | Corrective Action: |
| | | 1. Make sure that the resistance from D295 pin 20 to |
| | | ground is between 50 to 80 ohms. |
| | | 2. Do a wiring check between D295 pin 20 and D291 |
| | | pin 1 at the Yaw Damper Engage Solenoid. |
| | | 3. Do a wiring check to ground from D291 pin 2 at the |
| | | Yaw Damper Engage Solenoid. |
| | | 4. Inspect electrical connectors for bent or broken |
| | | pins, contamination, or damage. |
| | | 5. If the problem is not corrected, replace the Yaw |
| | | Damper Engage Solenoid (AMM 22-12-21/401). |
| | | 6. If the problem is not corrected, replace the Yaw |
| | | Damper Coupler (AMM 22-12-31/401). |
................................................................................. | PR sol | msg. no. | Possible Causes: | | fault | 22-21004 | 1. Pressure Reducer Bypass Valve | | | | 2. Yaw Damper Coupler | | | | | | | | Corrective Action: | | | | 1. Make sure that the resistance from D295 pin 31 | | | | to ground is between 50 to 80 ohms. | | | | 2. Do a wiring check between D295 pin 31 and D7377 | | | | pin 1 at the Pressure Reducer Bypass Valve | | | | solenoid. | | | | 3. Do a wiring check to ground from D7377 pin 2 at | | | | the Pressure Reducer Bypass Valve solenoid. | | | | 4. Inspect electrical connectors for bent or broken | | | | pins, contamination, or damage. | | | | 5. If the problem is not corrected, replace the | | | | Pressure Reducer Bypass Valve (AMM 27-21-96/401). | | | | 6. If the problem is not corrected, replace the Yaw | | | | Damper Coupler (AMM 22-12-31/401). |
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. AIRPLANES WITH 10-62253 ú
中國航空網 www.k6050.com
航空翻譯 www.aviation.cn
本文鏈接地址：737-300 400 500 AMM 飛機維護手冊 自動飛行 AUTOFLIGHT 2(85)
