# SDR ASAA2019021628202

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 16, 2019
- Submitted: February 20, 2019
- Operation: Air carrier
- Aircraft: [N403AS](https://openairdocs.org/aircraft/N403AS), registered now
- Make and model: Boeing 737-900ER
- Registry model: [Boeing 737-900ER](https://openairdocs.org/model/boeing-737-900er) (OpenAirDocs)
- Aircraft serial: 41730
- Aircraft time: 25,036 hours, 8,240 cycles
- System (JASC): [2310 · HF Communications System](https://openairdocs.org/jasc/2310)
- Part: Hf Comm
- Condition: Malfunctioned
- Location: Cockpit
- 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/ASAA2019021628202

## Discrepancy

HF COMMUNICATION POOR, ACARS FUNCTIONED NORMALLY, CPDLC NOT RECEIVING THROUGH HF RADIO. GROUNDED - YES. RESET SYSTEM, PERFORMED PLANE TO PLANE HF CHECK WITH NR 1 AND NR 2, OPS CHECK GOOD. REF AMM 23-11-00-730-801. SUSPECT ATMOSPHERIC CONDITIONS WERE A FACTOR.

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