# SDR ASAA2018071225345

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 11, 2018
- Submitted: July 12, 2018
- Operation: Air carrier
- Aircraft: [N563AS](https://openairdocs.org/aircraft/N563AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35180
- Aircraft time: 44,583 hours, 13,379 cycles
- System (JASC): [2310 · HF Communications System](https://openairdocs.org/jasc/2310)
- Part: Transceiver
- Part number: 8220990004
- Part serial: 17TC93
- Condition: Intermittent
- Location: E&E Bay
- Part time: 31,845 hours, 9,388 cycles
- Stage of operation: NR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2018071225345

## Discrepancy

NR 2 HF RADIO SHOWS FAIL/FAIL WHEN SELECTED, WHEN THE FREQ. TRANSFER SWITCH IS PUSHED, THE RADIOS WORK NORMALLY, BUT THEN SHOW FAIL. GROUNDED - YES. ACCOMPLISHED FIM TASK 23-11 TASK 801 BITE TEST PASS.  PRECAUTIONARY CHANGED HF TRANSCEIVER NR 2 LRU REF AMM 23-11-21-400-801.  BITE TEST GOOD. GROUND VERIFICATION SUCCESSFUL.

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