# SDR AALA202309297718

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 26, 2023
- Submitted: September 29, 2023
- Operation: Air carrier
- Aircraft: [N413AN](https://openairdocs.org/aircraft/N413AN), registered now
- Make and model: Airbus A321-253NX
- Registry model: [Airbus A321-253NX](https://openairdocs.org/model/airbus-a321-253nx) (OpenAirDocs)
- Aircraft serial: 9374
- Aircraft time: 10,999 hours, 3,069 cycles
- System (JASC): [3397 · Light System Wiring](https://openairdocs.org/jasc/3397)
- Part: Connector
- Part number: EN3646A62039DN
- Condition: Unsecure
- Location: Zone 200 - Fuse
- Stage of operation: IN
- How discovered: C
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202309297718

## Discrepancy

AIRCRAFT IN BASE MAINTENANCE: DURING EMERGENCY POWER SUPPLY UNIT SYSTEM TEST, SYSTEM TEST FAULTED FOR EMERGENCY POWER SUPPLY UNIT 12WL. MAINTENANCE DISCONNECTED THE CONNECTOR FOR EMERGENCY POWER SUPPLY UNIT 12WL AND RE-CONNECTED IT PER AMM 33-51-38. A SATISFACTORY OPERATIONAL CHECK WAS ACCOMPLISHED.

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