# SDR AMTA200700474

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 2, 2007
- Submitted: October 9, 2007
- Operation: Air carrier
- Aircraft: [N522AT](https://openairdocs.org/aircraft/N522AT), registered now
- Make and model: Boeing 757-23N
- Registry model: [Boeing 757-23N](https://openairdocs.org/model/boeing-757-23n) (OpenAirDocs)
- Aircraft serial: 29330
- System (JASC): [2310 · HF Communications System](https://openairdocs.org/jasc/2310)
- Part: Coupler
- Part number: 9640453011
- Part serial: FK51601205
- Condition: Unserviceable
- Location: Hf Radio
- Stage of operation: CR
- How discovered: O
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AMTA200700474

## Discrepancy

RT HF RADIO WILL NOT TUNE (CONTINUOUS TONE).  REMOVED AND REPLACED RT HF COUPLER IAW MM 23-11-01-4, OPS CHECK OK.

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