# SDR ASAA2023042743046

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 27, 2023
- Submitted: May 1, 2023
- Operation: Air carrier
- Aircraft: [N949AK](https://openairdocs.org/aircraft/N949AK), registered now
- Make and model: Boeing 737-9
- Registry model: [Boeing 737-9](https://openairdocs.org/model/boeing-737-9) (OpenAirDocs)
- Aircraft serial: 43356
- Aircraft time: 2,047 hours, 583 cycles
- System (JASC): [2310 · HF Communications System](https://openairdocs.org/jasc/2310)
- Part: Coupler
- Part number: 8220987004
- Part serial: 229582
- Condition: Failed
- Location: Vertical Stab
- Part time: 2,061 hours, 586 cycles
- Stage of operation: NR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2023042743046

## Discrepancy

HF2 WILL NOT TRANSMIT VOICE OR RECEIVE SELCAL NO SIDE TONE OR TUNING. STATIC ONLY NO RECEPTION. GROUNDED - YES. REMOVED HF #1 AND HF #2 COUPLERS REF AMM 23-11-61-000-801. REF ASA L/P 60445245 FOR HOLD DOWN THREAD DAMAGE. REPLACED HF #1 COUPLER REF MM 23-11-61/401. REPLACED HF #2 COUPLER REF MM 23-11-61/401.

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