# SDR YENA2026091000767

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 5, 2026
- Submitted: September 11, 2026
- Operation: Air carrier
- Aircraft: [N521JB](https://openairdocs.org/aircraft/N521JB), registered now
- Make and model: Airbus A320-232
- Registry model: [Airbus A320-232](https://openairdocs.org/model/airbus-a320-232) (OpenAirDocs)
- Aircraft serial: 01452
- Aircraft time: 89,342 hours, 33,063 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Power Supply
- Condition: No Test
- Location: Zone 200
- 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/YENA2026091000767

## Discrepancy

DURING HEAVY MAINTEANCE,EPSU 10WL DOES NOT PASS EMERGENCY LIGHT TEST; REF AEROMAN NR 2026-346269 W/O:2026 280/1: REMOVED AND REPLACED EPSU 10WL IAW AMM 33-51-38-400-001-A  AND AMM 33-51-38-000-001-A. PERFORMED OPERATIONAL TEST, TEST IS OK.

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