# SDR ASAA2015081212857

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 12, 2015
- Submitted: August 17, 2015
- Operation: Air carrier
- Aircraft: [N469AS](https://openairdocs.org/aircraft/N469AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 41702
- Aircraft time: 3,932 hours, 1,277 cycles
- System (JASC): [2310 · HF Communications System](https://openairdocs.org/jasc/2310)
- Part: Radio
- Condition: Malfunctioned
- Location: Nr 1 Hf
- 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/ASAA2015081212857

## Discrepancy

NR 1 HF DOES NOT TRANSMIT OR RECEIVE FROM EITHER CAPT OR FO COMM PANEL.  HF 2 RECEIVES ON BOTH PANELS BUT WILL NOT TRANSMIT.  THIS OCCURED 3 HOURS INTO FLIGHT.  WAS WORKING FINE FOR FIRST 3 HOURS.  ACFT GROUNDED.  PERFORMED HF COMMUNICATION SYS TEST TASK 23-11-00-730-801.  SUCCESSFUL GROUND VERIFICATION.  MADE CLEAR COMMUNICATION WITH SFO RADIO.  SELCAL SUCCESSUFL ALSO.  NO HISTORY PAST 60 DAYS.

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