# SDR USAA2010011990121

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 18, 2010
- Submitted: January 19, 2010
- Operation: Air carrier
- Aircraft: [N170US](https://openairdocs.org/aircraft/N170US), registered now
- Make and model: Airbus A321-211
- Registry model: [Airbus A321-211](https://openairdocs.org/model/airbus-a321-211) (OpenAirDocs)
- Aircraft serial: 1462
- Aircraft time: 31,359 hours, 11,281 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Epsu
- Part number: 32145410
- Part serial: 2300
- Condition: Faulted
- Location: Emergency Lights
- Part time: 31,027 hours, 12,148 cycles
- 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/USAA2010011990121

## Discrepancy

FLT NR 1776- FORWARD LEFT EMERGENCY POWER SUPPLY UNIT (10WL) FAULT.  MAINTENANCE REPLACED EPSU 10WL IAW AIRBUS MAINTENANCE MANUAL 33-51-38.

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