# SDR IPXA2026101229819

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 1, 2026
- Submitted: October 12, 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: 128,183 hours, 21,545 cycles
- System (JASC): [5270 · Door Warning System](https://openairdocs.org/jasc/5270)
- Part: Warning Message
- Part serial: NA
- Condition: Illuminated
- Location: L1 Door
- Component: Door
- Component part number: ML1327
- Stage of operation: IN
- How discovered: V
- Nature of condition: J
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/IPXA2026101229819

## Discrepancy

L1 DOOR NOT SHOWING CLOSED AND LATCHED ON EXTERIOR DOOR SYNOPTIC WHEN L1 DOOR CLOSED FOUND L-1 DOOR CLOSE SWITCH NG.REPLACED L-1 DDOR CLOSE SWITCH PER AMM 52-71-01.NOW L-1 DOOR INDICATION BACK TO NORMAL.

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