# SDR AALA202301065727

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 4, 2023
- Submitted: January 6, 2023
- Operation: Air carrier
- Aircraft: [N174US](https://openairdocs.org/aircraft/N174US), registered now
- Make and model: Airbus A321-231
- Registry model: [Airbus A321-231](https://openairdocs.org/model/airbus-a321-231) (OpenAirDocs)
- Aircraft serial: 1492
- Aircraft time: 70,667 hours, 26,977 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Power Supply
- Part number: 32145410
- Part serial: S1001
- Condition: Inoperative
- Location: Zone 200 - Fuse
- Part time: 62,574 hours, 28,056 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/AALA202301065727

## Discrepancy

AIRCRAFT WAS GROUNDED: WHILE PERFORMING AMM TASK 33-51-00-040-001-A FOR MEL 23-26A TEST FAULT AT SEAT 26,27,30,31,35,&36 LEFT AND RIGHT AFT #4 MAIN CABIN DOOR AND 28 AND 36 CENTER CEILING PANEL EMERGENCY LIGHTS. MAINTENANCE REPALCED EMERGENCY POWER SUPPLY UNIT 13WL PER AMM 33-51-38  AND ACCOMPLISHED A SATISFACTORY OPERATIONAL CHECK.

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