# SDR ASAA2021071335361

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 13, 2021
- Submitted: July 14, 2021
- Operation: Air carrier
- Aircraft: [N513AS](https://openairdocs.org/aircraft/N513AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35192
- Aircraft time: 45,838 hours, 13,518 cycles
- System (JASC): [2310 · HF Communications System](https://openairdocs.org/jasc/2310)
- Part: Transceiver
- Part number: 8220990004
- Part serial: 18YGX9
- Condition: Failed
- Location: Nr 1 Hf
- Part time: 23,610 hours, 6,785 cycles
- Stage of operation: NR
- How discovered: 9
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2021071335361

## Discrepancy

HF1 RADIO SHOWS FAIL/FAIL. GROUNDED - YES. NORMAL OPERATION RETURNED AFTER HF-1 BITE CK. NOTICED DURING RECEPTION THAT COMMUNICATION WAS WEAK AND GARBLED REGARDLESS OF SENSITIVITY SETTING. REMOVED & REPLACED #1 HF RT. OP CK NORMAL. REF B737-800 FIM 23-11 TASK 801.

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