# SDR UALA2013030101229

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 28, 2013
- Submitted: March 4, 2013
- Operation: Air carrier
- Aircraft: [N121UA](https://openairdocs.org/aircraft/N121UA), registered now
- Make and model: Boeing 747422
- Aircraft serial: 29167
- Aircraft time: 58,176 hours, 6,779 cycles
- Engine: Pwa PW4056
- System (JASC): [2350 · Audio Integrating System](https://openairdocs.org/jasc/2350)
- Part: Headset
- Part number: SMS170901
- Condition: Faulty
- Location: Cockpit
- Stage of operation: IN
- How discovered: O
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UALA2013030101229

## Discrepancy

CREW UNABLE TO COMMUNICATE ON VHF.  ISSUE STARTED WITH F/O POSITION, HOT MIC PROBLEM.  ATTEMPTED RESETS OF AMU AND OTHER COMPONENTS AND PROBLEM SEEMED TO ALSO AFFECT CAPTAIN AND FIRST OBSERVER POSITION.  REPLACED F/O HEADSET AND OPS CHECKED GOOD.

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