# SDR AALA202008289008

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 25, 2020
- Submitted: August 28, 2020
- Operation: Air carrier
- Aircraft: [N908AA](https://openairdocs.org/aircraft/N908AA), registered now
- Make and model: Airbus A321-231
- Registry model: [Airbus A321-231](https://openairdocs.org/model/airbus-a321-231) (OpenAirDocs)
- Aircraft serial: 7775
- Aircraft time: 9,905 hours, 3,716 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Switch
- Part number: E0062B1A4AD0A
- Condition: Defective
- 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/AALA202008289008

## Discrepancy

AIRCRAFT NOT GROUNDED - EPSU 15WL (EMERGENCY POWER SUPPLY UNIT) FAILED OPS CHECK.  REMOVED AND REPLACED SWITCH 4WL PER TSM 33-51-00-810-871-A, AND AWM 33-51-01 OPS CHECK, OKAY FOR SERVICE.

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