# SDR AALA201605039014

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 2, 2016
- Submitted: May 4, 2016
- Operation: Air carrier
- Aircraft: [N536UW](https://openairdocs.org/aircraft/N536UW), registered now
- Make and model: Airbus A321-231
- Registry model: [Airbus A321-231](https://openairdocs.org/model/airbus-a321-231) (OpenAirDocs)
- Aircraft serial: 4025
- Aircraft time: 21,155 hours, 8,374 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Power Supply
- Part number: 32146210
- Part serial: 138385
- Condition: Faulted
- Location: Cabin
- Part time: 7,008 hours, 2,846 cycles
- 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/AALA201605039014

## Discrepancy

AIRCRAFT IN BASE MX.  DURING ACCOMPLISHMENT OF CARD 26C22033001, EMER LIGHTING SYS DOOR SWITCHES OPERATIONAL TEST, FOUND AFT LT EMER POWER SUPPLY UNIT FAULT LIGHT ILLUMINATED.  REPLACED EMER POWER SUPPLY UNIT & ACCOMPLISHED A SATISFACTORY OPERATIONAL CHECK IAW AMM 33-51-38-400.

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