# SDR ASAA2019120651512

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 5, 2019
- Submitted: December 7, 2019
- Operation: Air carrier
- Aircraft: [N594AS](https://openairdocs.org/aircraft/N594AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35191
- Aircraft time: 44,465 hours, 13,297 cycles
- Engine: Cfmint CFM567B27B3
- System (JASC): [2310 · HF Communications System](https://openairdocs.org/jasc/2310)
- Part: Hf Comm
- Condition: Failed
- Location: Nr 1
- Stage of operation: NR
- How discovered: O
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2019120651512

## Discrepancy

HF1 FAIL GROUNDED - YES. PERFORMED B737-800 FIM TASK 23-11-00 HF COMM SYS-BITE PROCEDURE "HF 1 TRANSCEIVER CHECKS GOOD, HF 2 ALSO PASSES BITE TEST.CYCLED HF 1 CB AT P18-2 E11, HF 1 CHECKS GOOD GROUND VERIFICATION SUCCESSFUL.

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