# SDR ASAA2019041979049

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 17, 2019
- Submitted: April 20, 2019
- Operation: Air carrier
- Aircraft: [N440AS](https://openairdocs.org/aircraft/N440AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 41705
- Aircraft time: 21,923 hours, 7,183 cycles
- System (JASC): [2310 · HF Communications System](https://openairdocs.org/jasc/2310)
- Part: Hf Comm
- Condition: Malfunctioned
- Location: Nr 1
- Stage of operation: NR
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2019041979049

## Discrepancy

HF 1 SEEMS TO TRANSMIT FINE BUT RECEIVE IS VERY WEAK AND OCC. UNREADABLE. HF 2 WORKS FINE. GROUNDED - YES. ACCOMPLISHED HF RADIO CHECK PER B737-900 FIM 23-11-806. SUCCESSFUL GROUND VERIFICATION ACCOMPLISHED. HF 1 CHECKS NORMAL.

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