# SDR AALA202303209220

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 18, 2023
- Submitted: March 20, 2023
- Operation: Air carrier
- Aircraft: [N103US](https://openairdocs.org/aircraft/N103US), registered now
- Make and model: Airbus A320-214
- Registry model: [Airbus A320-214](https://openairdocs.org/model/airbus-a320-214) (OpenAirDocs)
- Aircraft serial: 861
- Aircraft time: 62,535 hours, 35,986 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Power Supply
- Part number: 32145410
- Part serial: 1499
- Condition: No Test
- Location: Zone 200 - Fuse
- Part time: 63,680 hours, 36,554 cycles
- Stage of operation: IN
- How discovered: C
- Nature of condition: J
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202303209220

## Discrepancy

AIRCRAFT IN BASE MAINTENANCE: DURING TEST OF PTP PANEL 110RH (NEXT TO FAP PANEL) RECEIVED "EPSU INT LOAD EMER R" MESSAGE. ON EPSU RH (12WL) SIDE "INTERIOR LIGHTS FAULT" IS ILLUMUNATED. MAINTENANCE REPLACED EMERGENCY POWER SUPPLY UNIT 12WL (AALA202303209220) AND BATTERY (AALA202303204015) PER AMM33-51-38. A SATISFACTORY OPERATIONAL CHECK WAS ACCOMPLISHED.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.