# SDR AALA202009089002

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 6, 2020
- Submitted: September 9, 2020
- Operation: Air carrier
- Aircraft: [N524UW](https://openairdocs.org/aircraft/N524UW), registered now
- Make and model: Airbus A321-231
- Registry model: [Airbus A321-231](https://openairdocs.org/model/airbus-a321-231) (OpenAirDocs)
- Aircraft serial: 3977
- Aircraft time: 39,480 hours, 14,284 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Battery
- Part number: 321431
- 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/AALA202009089002

## Discrepancy

AIRCRAFT NOT GROUNDED - EMERGENCY LIGHTING SYSTEM OPERATIONAL TEST FAILED PER AMM TASK 33-51-00-710-001 (JOB CARD 26L00025010, STEP 8.B.).  REMOVED AND REPLACED EPSU BATTERY AS NEEDED PER AMM 33-51-38, OPERATIONAL CHECK GOOD.

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