# SDR UIEA200300063

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 13, 2003
- Submitted: November 21, 2003
- Operation: Air carrier
- Aircraft: [N493MC](https://openairdocs.org/aircraft/N493MC), registered now
- Make and model: Boeing 747-47UF
- Registry model: [Boeing 747-47UF](https://openairdocs.org/model/boeing-747-47uf) (OpenAirDocs)
- Aircraft serial: 29254
- Engine: Ge CF680C2*
- System (JASC): [2133 · Pressure Regulator/Outflow Valve](https://openairdocs.org/jasc/2133)
- Part: Outflow Valve
- Condition: False Indication
- Location: Cabin Pressure
- Stage of operation: TO
- How discovered: O
- Nature of condition: N
- Precautionary procedure: C, D
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UIEA200300063

## Discrepancy

GT840 TLV/AMS OUTFLOW VALVE MESSAGE: OUTFLOW VALVE R ON TAXI OUT FOR TAKEOFF.  ACCOMPLISHED CMC GROUND TEST.  SYSTEM PASSED, ADVISORY MESSAGE CLEARED.  SYSTEM OPERATION OK.

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