03/25/21
Message Overview:
Message Description:
Internal fault to the Left TDR has occurred. Left TDR requires replacement or troubleshooting.
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# = 2
- {Term Definitions}
- TDR1-7 1X 350 01 EXCT XXXX-XXXX FFFT-XXXX XXXX-XXXX 350: (1X);POWER SUPPLY
- TDR1-11 1X 350 01 EXCT XXXX-XXXX FTFT-XXXX XXXX-XXXX 350: (5X);ROM
- TDR1-12 1X 350 01 EXCT XXXX-XXXX FTTF-XXXX XXXX-XXXX 350: (6X);RAM
- TDR1-13 1X 350 01 EXCT XXXX-XXXX TFTT-FFFT XXXX-XXXX 350: (B1);TCAS UART FAIL
- TDR1-17 1X 350 01 EXCT XXXX-XXXX TTFF-XXXX XXXX-XXXX 350: (CX);SQUITTER FAIL
- TDR1-18 1X 350 01 EXCT XXXX-XXXX TTFT-XXXX XXXX-XXXX 350: (DX);DIVERSITY FAIL
- TDR1-19 1X 350 01 EXCT XXXX-XXXX TTTF-FFTT XXXX-XXXX 350: (E3);PROCESSOR FAIL
- TDR1-20 1X 350 01 EXCT XXXX-XXXX TTTF-FTFF XXXX-XXXX 350: (E4);PROCESSOR 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:
- Internal fault to the Left TDR has occurred. Left TDR requires replacement or troubleshooting.