# SDR ASAA2018021023476

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 10, 2018
- Submitted: February 12, 2018
- Operation: Air carrier
- Aircraft: [N423AS](https://openairdocs.org/aircraft/N423AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 35206
- Aircraft time: 19,128 hours, 6,296 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/ASAA2018021023476

## Discrepancy

NR 2 HF RADIO TUNING PANEL SHOWS FAILED WHEN THE NR 2 HF IS SELECTED.  ACFT GROUNDED.  ACCOMPLISHED FIM 23-12, TASK 815.  RADIO TUNING PANEL PROBLEM FAULT ISOLATION & HF COMMUNICATION SYSTEM BITE PROCEDURE IAW FIM 23-11, TASK 801, OPS CHECKED NORMAL. NO HISTORY LAST 90 DAYS.

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