# SDR TRBA2010016

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 16, 2010
- Submitted: March 19, 2010
- Operation: Air carrier
- Aircraft: [N348AT](https://openairdocs.org/aircraft/N348AT), registered now
- Make and model: Aerosp ATR 72-212
- Registry model: [Aerosp ATR 72-212](https://openairdocs.org/model/aerospatiale-atr-72-212) (OpenAirDocs)
- Aircraft serial: 349
- Aircraft time: 30,978 hours, 34,181 cycles
- System (JASC): [2130 · Cabin Pressure Control System](https://openairdocs.org/jasc/2130)
- Part: Check Valve
- Part number: 41125A01
- Condition: Failed
- Location: Cabin Pressure
- Stage of operation: CL
- How discovered: V
- Nature of condition: O
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/TRBA2010016

## Discrepancy

MEDIUM POPING NOISE THEN PRESS BECOME OUT OFF CONTROL. ALTITUDE 11000 TO 12000 BOOT CLIMBING.  R & R NON RETURN VALVE SPRING ACTION ASSY IAW JIC NR 21-22-25.  PERFORMED PRESS.  CK FOUND SATISFACTORY AT THIS TIME.

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