# SDR IPXA2026090287354

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 23, 2026
- Submitted: September 2, 2026
- Operation: Air carrier
- Aircraft: [N579UP](https://openairdocs.org/aircraft/N579UP), registered now
- Make and model: Boeing 747-45E
- Registry model: [Boeing 747-45E](https://openairdocs.org/model/boeing-747-45e) (OpenAirDocs)
- Aircraft serial: 26062
- Aircraft time: 125,179 hours, 21,098 cycles
- System (JASC): [5250 · Fixed Inner Doors](https://openairdocs.org/jasc/5250)
- Part: Actuator
- Part number: 723D1009
- Part serial: BN126276
- Condition: Faulted
- Location: Flight Lock
- Stage of operation: CL
- How discovered: O
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/IPXA2026090287354

## Discrepancy

EICAS DOOR U/D FLT LK ON CLIMB OUT, NO PRESSURIZATION ISSUES. INSTALLED R/H UPPER DECK DOOR FLIGHT LOCK ACTUATOR REF MM 52-23-08. PLACED AIRCRAFT IN AIR MODE REF MM 32-09-02, ACTUATOR OPS CHECK NORMAL REF MM 52-23-08.

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