# SDR AALA20171029001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 28, 2017
- Submitted: November 1, 2017
- Operation: Air carrier
- Aircraft: [N105NN](https://openairdocs.org/aircraft/N105NN), registered now
- Make and model: Airbus A321-231
- Registry model: [Airbus A321-231](https://openairdocs.org/model/airbus-a321-231) (OpenAirDocs)
- Aircraft serial: 5904
- Aircraft time: 14,193 hours, 2,867 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Power Supply
- Part number: 32146210
- Part serial: 143046
- Condition: Faulty
- Location: Cabin
- Stage of operation: NR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA20171029001

## Discrepancy

AIRCRAFT WAS NOT GROUNDED. PILOT REPORTED CLASS 2 MESSAGE - CIDS 1. MAINTENANCE TROUBLESHOT, FOUND EPSU 15WL FAULTING. REPLACED EMERGENCY POWER SUPPLY UNIT 15WL PER AMM 33-51-38. ACCOMPLISHED SATISFACTORY OPERATIONAL CHECK.

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