# SDR CALA2026062217251

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 21, 2026
- Submitted: June 22, 2026
- Operation: Air carrier
- Aircraft: [N847UA](https://openairdocs.org/aircraft/N847UA), registered now
- Make and model: Airbus A319-131
- Registry model: [Airbus A319-131](https://openairdocs.org/model/airbus-industrie-a319-131) (OpenAirDocs)
- Aircraft serial: 1627
- Aircraft time: 72,977 hours, 32,946 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Epsu
- Part number: 32145410
- Part serial: 8308
- Condition: Faulty
- Location: Zone 200
- Part time: 22,633 hours, 11,561 cycles
- Stage of operation: IN
- How discovered: C
- Nature of condition: L
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2026062217251

## Discrepancy

DURING TEST OF CABIN EMERGENCY LIGHTS THE FOLLOWING MESSAGE WAS DISPLAYED. EPSU UNIT FWD L. DURING THE TEST THE FWD HALF OF THE CABIN EMERGENCY LIGHTS DID NOT COME ON. REPLACED EPSU 10WL AND BATTERY REF AMM 33-51-38 UP TO AND INCLUDING STEP 4.C.

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