03/25/21
Message Overview:
Message Description:
Internal fault to the Left TDR has occurred.
Possible Causes:
- Air Traffic Control Transponder 1 (ATC) (A31)
- Associated Wiring
Troubleshooting Tips:
Advisory Wire/Service Bulletin: None
Forum Articles/Infoservice/Newsletter: None
Fault Confirmation Procedure:
- Message# = 3
- Comp Id = A031
- {Term Definitions}
- TDR1-8 1X 350 01 EXCT XXXX-XXXX FFTF-XXXX XXXX-XXXX 350: (2X);XMIT/MODULATOR
- TDR1-9 1X 350 01 EXCT XXXX-XXXX FFTT-XXXX XXXX-XXXX 350: (3X);SYNTHESZR FAIL
- TDR1-10 1X 350 01 EXCT XXXX-XXXX FTFF-XXXX XXXX-XXXX 350: (4X);RECVR/IF FAIL
Quick Links:
| Removal of the Air Traffic Control (ATC) Transponder | AMM 34-54-01-000-801 |
| Installation of the Air Traffic Control (ATC) Transponder | AMM 34-54-01-400-801 |
| Standard Practices - Replace Wiring | SPM 20-12-00-02 |
| Standard Practices -Repair Wiring | SPM 20-12-10-02 |
Troubleshooting Recommendations:
- Left TDR requires replacement or troubleshooting.