# SDR AALA2020091539008

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 12, 2020
- Submitted: September 15, 2020
- Operation: Air carrier
- Aircraft: [N821AW](https://openairdocs.org/aircraft/N821AW), registered now
- Make and model: Airbus A319-132
- Registry model: [Airbus A319-132](https://openairdocs.org/model/airbus-a319-132) (OpenAirDocs)
- Aircraft serial: 1406
- Aircraft time: 62,654 hours, 28,185 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Power Supply
- Part number: 321431
- Part serial: 840908
- 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/AALA2020091539008

## Discrepancy

AIRCRAFT NOT GROUNDED, EMERGENCY LIGHTS FAILED OPERATIONAL TEST.  FAULTS: "EPSU INT LOAD EMER R" AND "EPSU INT LOAD EMER L".  REPLACED EPSU (EMERGENCY POWER SUPPLY UNIT) BATTERIES, LEFT EPSU 11WL (AALA202009139009) AND RIGHT EPSU 12WL (AALA202009139008), PER AMM 33-51-38.  OPERATIONAL CHECK NORMAL.

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