# SDR ASAA2017071321359

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 13, 2017
- Submitted: July 14, 2017
- Operation: Air carrier
- Aircraft: [N579AS](https://openairdocs.org/aircraft/N579AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35187
- Aircraft time: 39,466 hours, 11,773 cycles
- System (JASC): [2310 · HF Communications System](https://openairdocs.org/jasc/2310)
- Part: Transceiver
- Part number: 8220990004
- Part serial: 180TR2
- Condition: Intermittent
- Location: Hf System
- Part time: 24,793 hours, 7,529 cycles
- Stage of operation: CR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2017071321359

## Discrepancy

NR 2 HF, IN FLIGHT WOULD TUNE & TRANSMIT FOR APPROXIMATELY 10 SECONDS THEN FAIL.  WOULD DISPLAY FAIL ON BOTH THE ACTIVE & STANDBY SCREENS. IDENTICAL DISPLAYS ON CAPTAIN`S & FIRST OFFICER`S SIDES.  ACFT GROUNDED.   PERFORMED FIM 23-11, TASK 801,  NO FAULTS FOUND.  FAULT IS INTERMITTENT.  REMOVED AND REPLACED NR 2 HF TRANSCEIVER IAW AMM 23-11-21-000-801, AND AMM 23-11-21-400-801. OPS CHECKED AND GROUND VERIFICATION WAS GOOD.

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