# SDR Q2SA20200914435

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 14, 2020
- Submitted: September 14, 2020
- Operation: Air carrier
- Aircraft: [N777SA](https://openairdocs.org/aircraft/N777SA), registered now
- Make and model: Boeing 777FZB
- Registry model: [Boeing 777FZB](https://openairdocs.org/model/boeing-777fzb) (OpenAirDocs)
- Aircraft serial: 37989
- Aircraft time: 42,245 hours, 4,432 cycles
- Engine: Ge GE90110B1
- System (JASC): [2133 · Pressure Regulator/Outflow Valve](https://openairdocs.org/jasc/2133)
- Part: Outflow Valve
- Condition: Inoperative
- Location: Cabin Pressure
- Stage of operation: CR
- 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/Q2SA20200914435

## Discrepancy

AIRCRAFT GROUNDED, UNABLE TO CONTROL CABIN ALTITUDE PRESSURIZATION.  CABIN PRESSURE OUTFLOW VALVE ASSEMBLY REPLACED, IAW AMM 21-31-03-000-812-002/21-31-03-400-811-002.  TEST PASSED AND STATUS CLEARED.

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