# SDR ASAA2018081395739

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 9, 2018
- Submitted: August 13, 2018
- Operation: Air carrier
- Aircraft: [N506AS](https://openairdocs.org/aircraft/N506AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35690
- Aircraft time: 38,706 hours, 11,886 cycles
- System (JASC): [2397 · Communications System Wiring](https://openairdocs.org/jasc/2397)
- Part: Coupler
- Part number: 8220987004
- Part serial: 173413
- Condition: Failed
- Location: Hf Antenna
- Part time: 27,753 hours, 8,286 cycles
- 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/ASAA2018081395739

## Discrepancy

NR 1 HF RADIO NOT WORKING,  NR 2 HF WEAK, SCRATCHY, BUT READABLE.  TRIED FOUR DIFFERENT FREQUENCIES.  ACFT GROUNDED.  REMOVED AND REPLACED THE NR 1 HF ANTENNA COUPLER IAW AMM 23-11-61-400-801, OPS NORMAL IAW AMM 23-11-00-230-801.

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