# SDR CALA2026092119564

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 19, 2026
- Submitted: September 21, 2026
- Operation: Air carrier
- Aircraft: [N487UA](https://openairdocs.org/aircraft/N487UA), registered now
- Make and model: Airbus A320-232
- Registry model: [Airbus A320-232](https://openairdocs.org/model/airbus-a320-232) (OpenAirDocs)
- Aircraft serial: 1669
- Aircraft time: 67,642 hours, 29,897 cycles
- Engine: Iae V2527A5
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Power Supply
- Part number: 32145410
- Condition: Faulted
- 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/CALA2026092119564

## Discrepancy

DURING EMERGENCY LIGHT TEST FAIL MESSAGE EPSU INT LOAD EMER RT APPEARED. IAW FIM 33-51-00-810-807-A,  REMOVED AND REPLACED EPSU AND BATTERY 12WL IAW AMM 33-51-38-000-001-A. NO FIX. SUGGEST FURTHER TROUBLESHOOTING OF WIRING PER FIM.  CONFIRMED ALL EXIT MARKERS (4) AND ROW 12, 20, 21, & 22 AND RIGHT OVERHEAD EXIT LIGHT BETWEEN ROWS 20 AND 21 ILLUMINATED IAW AWM 33-51-07 AND RIGHT SLIDE ARMED LIGHT IAW AWM 33-51-04. PERFORMED LOAD.   FAULT EXTINGUISHED IAW AMM 33-51-00.

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