# SDR AALA201909059018

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 4, 2019
- Submitted: September 5, 2019
- Operation: Air carrier
- Aircraft: [N543UW](https://openairdocs.org/aircraft/N543UW), registered now
- Make and model: Airbus A321-231
- Registry model: [Airbus A321-231](https://openairdocs.org/model/airbus-a321-231) (OpenAirDocs)
- Aircraft serial: 4843
- Aircraft time: 26,761 hours, 10,688 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Battery
- Part number: 321431
- 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/AALA201909059018

## Discrepancy

AIRCRAFT NOT GROUNDED: MAINTENANCE REPORTS EPSU (10WL) FAILS BITE CHECK. REMOVED AND REPLACED EPSU (10WL) IAW AMM 33-51-38. REMOVED AND REPLACED BATTERY FOR EPSU (10WL) IAW AMM 33-51-38. BITE CHECKS GOOD. (SEE SDR # AALA201909059007)

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