# SDR AALA2020062219008

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 20, 2020
- Submitted: June 22, 2020
- Operation: Air carrier
- Aircraft: [N579UW](https://openairdocs.org/aircraft/N579UW), registered now
- Make and model: Airbus A321-231
- Registry model: [Airbus A321-231](https://openairdocs.org/model/airbus-a321-231) (OpenAirDocs)
- Aircraft serial: 6100
- Aircraft time: 21,292 hours, 8,243 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Power Supply
- Part number: 32146210
- Part serial: 143373
- Condition: Inoperative
- Location: Cabin
- Part time: 18,125 hours, 6,985 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/AALA2020062219008

## Discrepancy

AIRCRAFT IN BASE MAINTENANCE, EPSU (EMERGENCY POWER SUPPLY UNIT) 12WL IN PASSENGER CABIN INOPERATIVE.  REMOVED AND REPLACED EPSU 12WL PER AMM TASK 33-51-38-400-001-A.  PERFORMED OPERATIONAL CHECK PER AMM TASK 33-51-00-710-001-A, CHECKED OKAY.  BONDING TEST OKAY PER AMM TASK 20-28-00-869-002-A.

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