# SDR AALA202607074834

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 3, 2026
- Submitted: July 7, 2026
- Operation: Air carrier
- Aircraft: [N979UY](https://openairdocs.org/aircraft/N979UY), registered now
- Make and model: Airbus A321-231
- Registry model: [Airbus A321-231](https://openairdocs.org/model/airbus-a321-231) (OpenAirDocs)
- Aircraft serial: 5763
- Aircraft time: 39,832 hours, 16,570 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Controller
- Part number: 2079113AD
- Part serial: 1554506
- Condition: Faulted
- Location: Zone 100
- Part time: 29,815 hours, 14,275 cycles
- Stage of operation: TX
- 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/AALA202607074834

## Discrepancy

AIRCRAFT WAS NOT GROUNDED: CABIN LIGHTS WENT TO FULL BRIGHT UNCOMMANDED AND EMERGENCY LIGHTS CAME ON. MAINTENANCE REPLACED #1 (AALA202607074834) AND # 2 (AALA202607070951) CABIN PRESSURE CONTROLLERS PER AMM 21-31-34 AND ACCOMPLISHED A SATISFACTORY OPERATIONAL CHECK WITH NO ISSUES NOTED.

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