# SDR UALA2013022801207

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 28, 2013
- Submitted: February 28, 2013
- Operation: Air carrier
- Aircraft: N589UA
- Make and model: Boeing 757222
- Aircraft serial: 28707
- Aircraft time: 60,079 hours, 16,809 cycles
- Engine: Pwa PW2037
- System (JASC): [2310 · HF Communications System](https://openairdocs.org/jasc/2310)
- Part: Coupler
- Part number: 490S1
- Part serial: 10529
- Condition: Faulty
- Location: Hf Comm
- Stage of operation: IN
- 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/UALA2013022801207

## Discrepancy

LEFT HF RADIO UNABLE TO TRANSMIT.  REPLACED LEFT HF COUPLER PER MM, OPS CHECK GOOD.  TUNE FREQUENCY 6.640 TOOK BETWEEN 4 AND 7 SECONDS.  RADIO TRANSMISSION MADE ON TUNED FREQUENCY TRANSMIT & RECEIVE VOICE COMMUNICATION.

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