# SDR ASAA2019092030760

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 20, 2019
- Submitted: September 23, 2019
- Operation: Air carrier
- Aircraft: [N558AS](https://openairdocs.org/aircraft/N558AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35177
- Aircraft time: 50,290 hours, 14,833 cycles
- System (JASC): [2310 · HF Communications System](https://openairdocs.org/jasc/2310)
- Part: Coupler
- Part number: 8220987004
- Part serial: 154646
- Condition: Defective
- Location: Hf Comm
- Part time: 44,656 hours, 13,258 cycles
- Stage of operation: NR
- How discovered: O
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2019092030760

## Discrepancy

HF 2 WILL NOT XMIT OR RECEIVE. GROUNDED - YES. REPLACED #2 HF COUPLER, OPS CHECK OK REF AMM 23-11-61 PB 400.

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