# SDR AALA202010289010

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 27, 2020
- Submitted: October 29, 2020
- Operation: Air carrier
- Aircraft: [N552UW](https://openairdocs.org/aircraft/N552UW), registered now
- Make and model: Airbus A321-231
- Registry model: [Airbus A321-231](https://openairdocs.org/model/airbus-a321-231) (OpenAirDocs)
- Aircraft serial: 4957
- Aircraft time: 29,845 hours, 11,104 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Battery
- Condition: No Test
- 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/AALA202010289010

## Discrepancy

AIRCRAFT WAS GROUNDED.  EMERGENCY LIGHTS FAIL TEST.  REMOVED AND REPLACED MID RIGHT EMERGENCY POWER SUPPLY UNIT BATTERY, IAW AMM 33-51-38.

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