# SDR AALA202503185746

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 17, 2025
- Submitted: March 18, 2025
- Operation: Air carrier
- Aircraft: [N784AN](https://openairdocs.org/aircraft/N784AN), registered now
- Make and model: Boeing 777223
- Aircraft serial: 29588
- Aircraft time: 95,172 hours, 11,798 cycles
- System (JASC): [2133 · Pressure Regulator/Outflow Valve](https://openairdocs.org/jasc/2133)
- Part: Motor
- Part number: 27044703
- Condition: Inoperative
- Location: Zone 100
- Stage of operation: CL
- How discovered: O
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202503185746

## Discrepancy

AIRCRAFT WAS NOT GROUNDED: CABIN WOULD NOT PRESSURIZE WITH THE FORWARD OUTFLOW VALVE FULLY CLOSED. UPON ARRIVING AT THE GATE. FOUND OUTFLOW VALVE FULLY OPEN. MAINTENANCE REPLACED OUTFLOW VALVE MOTOR AMM 21-00.

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