# SDR ASAA2016091918097

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 19, 2016
- Submitted: September 23, 2016
- Operation: Air carrier
- Aircraft: [N559AS](https://openairdocs.org/aircraft/N559AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35178
- Aircraft time: 36,990 hours, 11,026 cycles
- System (JASC): [2310 · HF Communications System](https://openairdocs.org/jasc/2310)
- Part: Transceiver
- Part number: 8220990004
- Part serial: 17H35T
- Condition: Failed
- Location: Nr 1 Hf
- Part time: 25,037 hours, 7,474 cycles
- Stage of operation: NR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2016091918097

## Discrepancy

NR 1 HF FAIL ILLUMINATION ON ACTIVE & STBY.  ACFT GROUNDED. COULD NOT DUPLICATE ISSUE.  REMOVED AND REPLACED THE NR 1 HF RECEIVER/TRANSMITTER IAW AMM 23-11-21-400-801. AS A PRECAUTION.  OPS CHECKED OK.

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