# SDR SWIA972528

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 23, 2001
- Submitted: April 24, 2001
- Operation: Air carrier
- Aircraft: [N297SW](https://openairdocs.org/aircraft/N297SW), registered now
- Make and model: Emb EMB-120ER
- Registry model: [EMB EMB-120ER](https://openairdocs.org/model/embraer-emb-120er) (OpenAirDocs)
- Aircraft serial: 120327
- Aircraft time: 11,163 hours, 16,181 cycles
- Engine: Pwa PW118B
- System (JASC): [2133 · Pressure Regulator/Outflow Valve](https://openairdocs.org/jasc/2133)
- Part: Outflow Valve
- Condition: Faulty
- Location: Cabin Pressure
- Stage of operation: CL
- How discovered: O
- Nature of condition: O
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/SWIA972528

## Discrepancy

WHEN AUTOMATIC PRESSURIZATION REACHES 4.0 PSI, CABIN RATE GOES UP AND DOWN 72000 FT/MIN.  REPLACED PNEUMATIC OUTFLOW VALVE IAW CARD RII 21-303.  OPS CHECK GOOD.  P/N:  2093K010800, S/N ON:  075, S/N OFF:  395.

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