# SDR ASAA2014102909535

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 29, 2014
- Submitted: October 31, 2014
- Operation: Air carrier
- Aircraft: [N471AS](https://openairdocs.org/aircraft/N471AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 41703
- Aircraft time: 166 hours, 51 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: 9
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2014102909535

## Discrepancy

NR 1 HF UNABLE TO TRANSMIT, RECEIVE ONLY.  NO INOPERATIVE OR FAIL INDICATION ON PANEL. TOGGLED ACTIVE TO STANDBY.  AFTER APPROX 10 MINUTES TRANSMIT CAPABILITIES REGAINED ON NR 1 HF.   ACFT GROUNDED. PERFORMED FIM 23-11 TASK 806, OPS NORMAL HF1 RECEIVE/TRANSMIT.  GROUND VERIFICATION GOOD.

---
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.