# SDR AALA201806229010

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 21, 2018
- Submitted: June 23, 2018
- Operation: Air carrier
- Aircraft: [N134AN](https://openairdocs.org/aircraft/N134AN), registered now
- Make and model: Airbus A321-231
- Registry model: [Airbus A321-231](https://openairdocs.org/model/airbus-a321-231) (OpenAirDocs)
- Aircraft serial: 6495
- Aircraft time: 10,371 hours, 4,044 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Battery
- Part number: 321431
- Part serial: 775677
- Condition: Discharged
- Location: Cabin
- 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/AALA201806229010

## Discrepancy

AIRCRAFT WAS NOT GROUNDED. WHILE PERFORMING OPERATIONS TEST OF EMERGENCY LIGHTS, CLASS ONE MESSAGE "33-50-00 EPSU 13WL AFT LEFT". REPLACED EMERGENCY POWER SUPPLY UNIT BATTERY (13WL) PER AMM 33-51-38. OPERATIONS CHECK GOOD.

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