# SDR ASAA2017012019477

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 20, 2017
- Submitted: January 23, 2017
- Operation: Air carrier
- Aircraft: [N457AS](https://openairdocs.org/aircraft/N457AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 36355
- Aircraft time: 11,756 hours, 3,876 cycles
- System (JASC): [2310 · HF Communications System](https://openairdocs.org/jasc/2310)
- Part: Unknown
- Condition: Malfunctioned
- Location: Hf Comm
- Stage of operation: NR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2017012019477

## Discrepancy

HF NR 1 SHOWS FAIL, WILL SHOW FREQS WHEN FLIP FLOP FROM ACTIVE TO STBY THEN AFTER ABOUT 7 SECONDS REVERTS TO FAIL TRANSMITS AND RECEIVES OKAY. GROUNDED - YES. NO HISTORY 90 DAYS PERFORMED FIM 23-11 TASK 801 TEST PASS.

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