# SDR ASAA2015082312877

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 23, 2015
- Submitted: August 25, 2015
- Operation: Air carrier
- Aircraft: [N577AS](https://openairdocs.org/aircraft/N577AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35186
- Aircraft time: 32,340 hours, 9,681 cycles
- System (JASC): [2310 · HF Communications System](https://openairdocs.org/jasc/2310)
- Part: Transceiver
- Part number: 8220990004
- Part serial: 17TCFL
- Condition: Failed
- Location: Hf Comms
- Part time: 20,905 hours, 6,316 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/ASAA2015082312877

## Discrepancy

HF1 RECEIVES VERY GARBLED BUT SEEMS TO TRANSMIT OK.  HF2 OPERATES NORMALLY. ACFT GROUNDED.  CONFIRMED DISCREPANCY.  REPLACED NR 1 HF TRANSCEIVER IAW AMM 23-11-21.  NR 1 HG GROUND FUNCTIONAL CHECK SUCCESSFUL.  ACFT OK FOR SERVICE.

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