# SDR ASAA2019071530079

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 15, 2019
- Submitted: July 18, 2019
- Operation: Air carrier
- Aircraft: [N579AS](https://openairdocs.org/aircraft/N579AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35187
- Aircraft time: 47,043 hours, 13,958 cycles
- System (JASC): [2310 · HF Communications System](https://openairdocs.org/jasc/2310)
- Part: Warning System
- Condition: False Activation
- Location: Cockpit
- Stage of operation: TX
- How discovered: O
- Nature of condition: N
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2019071530079

## Discrepancy

HF#2 DISPLAYS FAIL/FAIL WHEN SELECTED ON BOTH CA AND FO COMM PANELS. GROUNDED - YES. UPON AIRCRAFT POWER UP, HF 1&2 SHOW NO FAIL/FAIL ON RTPS' WHEN SELECTED REF FIM'S 23-12 TASK 812, AND 23-11 TASK 811. HF 2 TRANSMIT/RECEIVE ESTABLISHED, LRU BITE TESTS GOOD. GROUND VERIFICATION TESTS GOOD.

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