# SDR 2004FA0000184

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 4, 2004
- Submitted: February 12, 2004
- Operation: General aviation
- Aircraft: N900JD
- Make and model: Cessna 650
- Registry model: [Cessna 650](https://openairdocs.org/model/cessna-650) (OpenAirDocs)
- Aircraft serial: 6500213
- Engine: Garrtt TFE731*
- System (JASC): [2133 · Pressure Regulator/Outflow Valve](https://openairdocs.org/jasc/2133)
- Part: Check Valve
- Part number: 40117
- Part serial: 0281
- Condition: Cracked
- Location: Cabin Pressure
- Part time: 4,923 hours
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2004FA0000184

## Discrepancy

WHILE TROUBLESHOOTING A PRESSURIZATION PROBLEM, A CRACKED CHECK VALVE AT THE RT PRESSURE REGULATING AND CHECK VALVE ASSEMBLY WAS FOUND.  A PIECE OF THE CHECK VALVE WAS MISSING.  THE LT SIDE WAS THEN CHECKED AND AN IDENTICAL CHECK VALVE CONDITION WAS FOUND.  A SEARCH FOR THE MISSING PIECE WAS UNSUCCESSFUL.

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