# SDR F3LA202512150337

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 13, 2025
- Submitted: December 15, 2025
- Operation: Air carrier
- Aircraft: [N649FR](https://openairdocs.org/aircraft/N649FR), registered now
- Make and model: Airbus A321-271NX
- Registry model: [Airbus A321-271NX](https://openairdocs.org/model/airbus-s-a-s-a321-271nx) (OpenAirDocs)
- Aircraft serial: 12050
- Aircraft time: 4,244 hours, 2,000 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Power Supply
- Part number: 32146210
- Part serial: 185180
- Condition: Failed
- 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/F3LA202512150337

## Discrepancy

DURING HEAVY CHECK EPSU UNIT 10WL FAILED PTT & SYSTEM TEST.  FLAGGED UNIT FAULT.  FAULT HAPPENED DURING A SCHEDULED RON MAINTENANCE VISIT & DID NOT CAUSE A FLIGHT DELAY.
IAW AMM 33-51-38-000-A, & 33-51-38-400-001-A,  REMOVED AND REPLACED EPSU UNIT 10WL PIT TEST, EPSU & CIDS POWER-UP TESTED OK.  NO OTHER DEFECTS NOTED. ACFT OK FOR SERVICE.

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