# SDR SA06002

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 3, 2006
- Submitted: January 4, 2006
- Operation: Air carrier
- Aircraft: [N177US](https://openairdocs.org/aircraft/N177US), registered now
- Make and model: Airbus A321-211
- Registry model: [Airbus A321-211](https://openairdocs.org/model/airbus-a321-211) (OpenAirDocs)
- Aircraft serial: 1517
- Engine: Cfmint CFM565A3
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Epsu
- Part number: 32145510
- Condition: Faulty
- Location: Pax Cabin
- Part time: 15,740 hours
- Stage of operation: IN
- How discovered: 9
- Nature of condition: L
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/SA06002

## Discrepancy

RECEIVED EPSU INT LOAD FAULT EXIT L MESSAGE WHILE PERFORMING TEST OF EMERGENCY LIGHTS SYSTEM.  MAINTENANCE REPLACED THE FORWARD, MID-LT EMERGENCY POWER SUPPLY UNIT.  OPERATIONALLY CHECKS OK.

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