# SDR 9JLA2021120831654

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 5, 2021
- Submitted: December 8, 2021
- Operation: Air carrier
- Aircraft: N1PK
- Make and model: Gulstm 200
- Aircraft serial: 250
- Aircraft time: 1,349 hours, 641 cycles
- System (JASC): [2300 · Communications System](https://openairdocs.org/jasc/2300)
- Part: Audio Control
- Part number: 9903333488
- Part serial: 10090060427
- Condition: Intermittent
- Stage of operation: NR
- 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/9JLA2021120831654

## Discrepancy

THE FLIGHT CREW REPORTED THE COPILOTS AUDIO PANEL VOLUME COULD NOT BE CONTROLLED, DEFAULTED TO FULL VOLUME. THE MAINTENANCE TEAM DETERMINED THE CO-PILOTS AUDIO CONTROL PANEL WAS DEFECTIVE. THE AUDIO CONTROL PANEL WAS REMOVED AND REPLACED WITH A REPAIRED UNIT. OPERATIONAL CHECKS WERE SATISFACTORY AND THE AIRCRAFT WAS THEN RETURNED TO SERVICE.

---
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.