# SDR IPXA2026022552524

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 23, 2026
- Submitted: February 25, 2026
- Operation: Air carrier
- Aircraft: [N578UP](https://openairdocs.org/aircraft/N578UP), registered now
- Make and model: Boeing 747-45E
- Registry model: [Boeing 747-45E](https://openairdocs.org/model/boeing-747-45e) (OpenAirDocs)
- Aircraft serial: 27154
- Aircraft time: 125,972 hours, 21,214 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Power Supply
- Part number: 20131A
- Part serial: 56820
- Condition: Inoperative
- Location: Zone 200
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/IPXA2026022552524

## Discrepancy

FOUND M5055 POWER SUPPLY MALFUNCTION. (REPLACE) IAW AMM 33-51-04-902-001-001 REV.115 REPLACED POWER SUPPLY (M5055) AT UPPER DECK LEFT SIDE AND PERFORMED POWER SUPPLY TEST, THE RESULT WAS SATISFACTORY.

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