# SDR ASAA2017110422426

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 4, 2017
- Submitted: November 6, 2017
- Operation: Air carrier
- Aircraft: [N583AS](https://openairdocs.org/aircraft/N583AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35681
- Aircraft time: 39,240 hours, 11,609 cycles
- System (JASC): [2310 · HF Communications System](https://openairdocs.org/jasc/2310)
- Part: Coupler
- Condition: Intermittent
- Location: Hf Comms
- Stage of operation: IN
- How discovered: C
- Nature of condition: L
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2017110422426

## Discrepancy

DURING OPERATIONAL TEST OF HF COUPLERS, THE NR 1 HF INTERMITTENTLY FAILED.  ACFT GROUNDED. COULD NOT DUPLICATE FAILURE. CONTACTED ON 10.057, WAS RECEIVED 5 X 5 ON BOTH HF 1 & 2. TRANSCEIVER BITE SHOWED NO FAULTS.

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