# SDR CALA2025060205160

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 1, 2025
- Submitted: June 2, 2025
- Operation: Air carrier
- Aircraft: [N431UA](https://openairdocs.org/aircraft/N431UA), registered now
- Make and model: Airbus A320-232
- Registry model: [Airbus A320-232](https://openairdocs.org/model/airbus-a320-232) (OpenAirDocs)
- Aircraft serial: 571
- Aircraft time: 84,531 hours, 33,356 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Lamp
- Condition: Inoperative
- 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/CALA2025060205160

## Discrepancy

EPSU EXT LOAD EMER L R&R 11WL EMERGENCY POWER SUPPLY UNIT PER AMM 33-51-38-400-001-A, DID NOT HELP. INSTALLED BACK THE OLD EPSU AND BATTERY. FOUND ON EPSU EXTERIOR LIGHTS FAULT LIGHT ON SEE PIC. CHECKED OVERWING LIGHTS FOUND AFT LIGHT NOT WORKING P/N GE1810.  RELAMPED LH THE EMERGENCY OVERWING LIGHT PER AMM 33-51-15-400-001-A. OPS CHECK GOOD. EPSU TEST PASSED.

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