# SDR CALA2013100391719

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 30, 2013
- Submitted: October 4, 2013
- Operation: Air carrier
- Aircraft: [N221UA](https://openairdocs.org/aircraft/N221UA), registered now
- Make and model: Boeing 777222
- Aircraft serial: 30552
- Aircraft time: 51,992 hours, 6,441 cycles
- Engine: Pwa PW40903
- System (JASC): [2350 · Audio Integrating System](https://openairdocs.org/jasc/2350)
- Part: Audio Panel
- Part number: 570111
- Part serial: 1695
- Condition: Faulty
- Location: Cockpit
- Stage of operation: NR
- 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/CALA2013100391719

## Discrepancy

CAPTAIN`S AUDIO PANEL HAS VOLUME SPIKES ON VHF L WHEN VOLUME IS ADJUSTED.  REPLACED CAPTAIN`S ACP IAW AMM.

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