# SDR AALA201911199010

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 18, 2019
- Submitted: November 19, 2019
- Operation: Air carrier
- Aircraft: [N981UY](https://openairdocs.org/aircraft/N981UY), registered now
- Make and model: Airbus A321-231
- Registry model: [Airbus A321-231](https://openairdocs.org/model/airbus-a321-231) (OpenAirDocs)
- Aircraft serial: 5800
- Aircraft time: 21,492 hours, 8,187 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Battery
- Part number: 321431
- Condition: Inoperative
- Location: Emergency Lights
- 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/AALA201911199010

## Discrepancy

AIRCRAFT IN BASE VISIT: MAINTENANCE REPORTS INOP EPSU-EMERGENCY POWER SUUPLY UNIT (10WL) BATERY IN PASSENGER CABIN. REPLACED BATERY OF THE EPSU 10WL IAW AMM 33-51-38-400-002-A IN PASSENGER CABIN 1E/A AND PERFORMED OPERATIONAL TEST OF THE EMERGENCY POWER SUPPLY UNIT IAW AMM 33-51-00-710-001-A. TEST IS OK.

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