# SDR ASAA2019081203359

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 10, 2019
- Submitted: August 12, 2019
- Operation: Air carrier
- Aircraft: [N491AS](https://openairdocs.org/aircraft/N491AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 44109
- Aircraft time: 14,948 hours, 4,907 cycles
- System (JASC): [2310 · HF Communications System](https://openairdocs.org/jasc/2310)
- Part: Hf Comm
- Condition: Malfunctioned
- Location: Nr 2
- Stage of operation: NR
- How discovered: O
- Nature of condition: N
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2019081203359

## Discrepancy

WHEN HF2 IS SELECTED ON RADIO TUNING PANEL "FAIL" IS SHOWN IN BOTH FREQUENCY WINDOWS. GROUNDED - YES. CW B737-900 FIM 23-11 TASK 802 BITE PROCEDURE REVEALED NO FAULTS ON RADIO TUNE PANEL. INTERMITTENT FAULT OK FOR SERVICE. CW GROUND VERIFICATION OPS NORMAL.

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