# SDR KCSA2025071238

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 12, 2025
- Submitted: July 14, 2025
- Operation: Air carrier
- Aircraft: [N742CK](https://openairdocs.org/aircraft/N742CK), registered now
- Make and model: Boeing 747446
- Aircraft serial: 24424
- Aircraft time: 124,015 hours, 25,545 cycles
- System (JASC): [5220 · Emergency Exits](https://openairdocs.org/jasc/5220)
- Part: Lock
- Condition: Faulted
- Location: Zone 800
- 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/KCSA2025071238

## Discrepancy

DOOR UPPER DECK FLIGHT LOCK. TRANSFERRED TO DMI 100259089 IAW MEL 52-23-6-2 CATEGORY C DUE.  PLACARDS INSTALLED MAINTENANCE PROCEDURES COMPLIED WITH.  100259106 - PERFORMED ADJUSTMENT TEST OF UPPER DECK FLIGHT LOCK IAW B747-400 AMM 52-23-00. NO DEFECTS NOTED.

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