# SDR KCSA2025101956

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 19, 2025
- Submitted: October 21, 2025
- Operation: Air carrier
- Aircraft: [N745CK](https://openairdocs.org/aircraft/N745CK), registered now
- Make and model: Boeing 747446
- Aircraft serial: 26361
- Aircraft time: 101,277 hours, 15,017 cycles
- System (JASC): [5270 · Door Warning System](https://openairdocs.org/jasc/5270)
- Part: Lock
- Condition: Warning Message
- Location: Zone 800
- Stage of operation: CL
- How discovered: O
- Nature of condition: N
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/KCSA2025101956

## Discrepancy

DOOR UPPER DECK FLIGHT LOCK MESSAGE.   BOTH DOORS FLIGHT LOCK ACTUATORS OPERATIONAL CHECKS NORMAL IAW B747-400 AMM 52-23-00.

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