# SDR AALA2019042329019

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 21, 2019
- Submitted: April 23, 2019
- Operation: Air carrier
- Aircraft: [N174US](https://openairdocs.org/aircraft/N174US), registered now
- Make and model: Airbus A321-211
- Registry model: [Airbus A321-211](https://openairdocs.org/model/airbus-a321-211) (OpenAirDocs)
- Aircraft serial: 1492
- Aircraft time: 61,211 hours, 23,082 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Power Supply
- Part number: 32145510
- Part serial: 2114
- Condition: Inoperative
- Location: Emergency Lights
- Part time: 56,708 hours, 21,137 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/AALA2019042329019

## Discrepancy

AIRCRAFT IN BASE VISIT: MAINTENANCE FOUND INOP EPSU-EMERGENCY POWER SUPPLY UNIT 14WL IN PASSENGER CABIN. REPLACED EMERGENCY POWER SUPPLY UNIT (14WL) IN PASSENGER CABIN IAW AMM 33-51-38-400-001-A. BITE TEST IS OK.

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