# SDR WWMA9700007

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 13, 1997
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: N356SB
- Make and model: Saab 340B
- Registry model: [Saab 340B](https://openairdocs.org/model/saab-340b) (OpenAirDocs)
- Aircraft serial: 340B356
- System (JASC): [2130 · Cabin Pressure Control System](https://openairdocs.org/jasc/2130)
- Part: Safety Valve
- Part number: 1036804
- Condition: Defective
- Location: Cabin
- Part time: 6,815 hours
- Stage of operation: DE
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/WWMA9700007

## Discrepancy

ALTITUDE CABIN PRESSURE DUMPED AT 12,000 FT, 3,000 FT A MINUTE.  DESCENDED TO 10,000 AT .4  PRESSURE DIFFERENTIAL.  MAINTENANCE REPLACED THE CABIN AIR PRESSURE OUTFLOW SAFETY VALVE AND  PERFORMED OPERATIONAL CHECKS IAW SAAB AMM 21-30-00.

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