# SDR ASAA2020122433748

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 24, 2020
- Submitted: December 29, 2020
- Operation: Air carrier
- Aircraft: [N533AS](https://openairdocs.org/aircraft/N533AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35201
- Aircraft time: 37,418 hours, 10,827 cycles
- System (JASC): [2310 · HF Communications System](https://openairdocs.org/jasc/2310)
- Part: Coupler
- Part number: 8220987004
- Part serial: 173406
- Condition: Inoperative
- Location: Hf Radio
- Part time: 37,415 hours, 10,820 cycles
- Stage of operation: TO
- 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/ASAA2020122433748

## Discrepancy

AFTER DEPARTURE HF-1 INOPERABLE.  NO INCOMING AUDIO, NO TRANSMIIT OR SIDE TONE.  GROUNDED-YES.  VERIFIED DEFECT, NR 1 HF WILL NOT TUNE, NO SIDE TONE.  REMOVED AND REPLACED NR 1 HF COUPLER, REF B737-800 AMM 23-11-61.  GROUND VERIFICATION TEST PASSED.

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