# SDR WX0A070789

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 5, 2011
- Submitted: March 10, 2011
- Operation: Air carrier
- Aircraft: [N861GA](https://openairdocs.org/aircraft/N861GA), registered now
- Make and model: Doug MD 83
- Registry model: [Doug MD 83](https://openairdocs.org/model/mcdonnell-douglas-md-83) (OpenAirDocs)
- Aircraft serial: 49557
- System (JASC): [2130 · Cabin Pressure Control System](https://openairdocs.org/jasc/2130)
- Part: Unknown
- Condition: Malfunctioned
- 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/WX0A070789

## Discrepancy

FLIGHT CREW REPORTED, WOULD NOT HOLD RATED PRESSURE AT ALTITUDE WITH OUTFLOW VALVE CLOSED.  CABIN CLIMB AT 5-600 FPM AND CABIN ALT AT 9,000 AT FL 29,000, CABIN CONTINUED CLIMBING UNTIL REACHING FL 21,000.  MAINTENANCE PERSONNEL PERFORMED OPS CHECK ON PRESSURIZATION WITH APU AIR IAW MM 21-30-00.  NO DEFECTS NOTED, ALSO PERFORMED EXTERNAL FOR LEAKS, NO MAJOR LEAKS FOUND, AIRCRAFT OK FOR EVALUATION FLIGHT.  AIRBORNE SYSTEM TEST SATISFACTORY.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.