# SDR ASAA2018040924192

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 9, 2018
- Submitted: April 11, 2018
- Operation: Air carrier
- Aircraft: [N557AS](https://openairdocs.org/aircraft/N557AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35176
- Aircraft time: 45,106 hours, 13,323 cycles
- System (JASC): [2310 · HF Communications System](https://openairdocs.org/jasc/2310)
- Part: Warning Message
- Condition: False Activation
- Location: Nr 1 Hf Sys
- 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/ASAA2018040924192

## Discrepancy

NR 1 HF FAILED.  ACFT GROUNDED. ACCOMPLISHED FIM 23-11 / 801.  BITE CHECKED GOOD. NO DEFECTS NOTED. ACCOMPLISHED FIM 23-11 T806. NR 1 AND 2 HF TESTS PASSED. NO DEFECTS NOTED. GROUND VERIFICATION SUCCESSFUL. OK FOR CONTINUED SERVICE.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.