# SDR ASAA2021062335149

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 23, 2021
- Submitted: June 26, 2021
- Operation: Air carrier
- Aircraft: [N512AS](https://openairdocs.org/aircraft/N512AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 39043
- Aircraft time: 46,208 hours, 13,681 cycles
- System (JASC): [2310 · HF Communications System](https://openairdocs.org/jasc/2310)
- Part: Hf Comm
- Condition: Malfunctioned
- Location: Nr 1
- Stage of operation: NR
- How discovered: O
- Nature of condition: N
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2021062335149

## Discrepancy

HF-1 SHOWS FAIL IN ACP MCU. GROUNDED - YES. RESET HF 1 C/B PERFORMED BITE TEST REF B737-800 FIM 23-11 TASK 801 NO FAULTS FOUND OP CHECK OK. A/C OK FOR SERVICE.

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