# SDR UIEA2025051900639

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 15, 2025
- Submitted: May 19, 2025
- Operation: Air carrier
- Aircraft: [N856GT](https://openairdocs.org/aircraft/N856GT), registered now
- Make and model: Boeing 747-87UF
- Registry model: [Boeing 747-87UF](https://openairdocs.org/model/boeing-747-87uf) (OpenAirDocs)
- Aircraft serial: 37561
- Aircraft time: 56,367 hours, 9,310 cycles
- System (JASC): [3150 · Central Warning](https://openairdocs.org/jasc/3150)
- Part: Warning Message
- Condition: Activated
- Location: Cabin Pressure
- Stage of operation: CR
- 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/UIEA2025051900639

## Discrepancy

CABIN ALTITUDE WARNING MSG AT 39,100". C/W IAI AND CHECKLIST(<P>CMC REVIEWED, NIL RELATED FAULT MSG. REF IFIM 31-98-00-810-801 CORRECTIVE ACTION C/W CPCS CENTER A & B CMC TEST OK. REF AMM 21-31-03</P>)

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