# SDR AT0200046

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 8, 2002
- Submitted: April 10, 2002
- Operation: Air carrier
- Aircraft: [N819AT](https://openairdocs.org/aircraft/N819AT), registered now
- Make and model: Doug DC-9-32
- Registry model: [Doug DC-9-32](https://openairdocs.org/model/mcdonnell-douglas-dc-9-32) (OpenAirDocs)
- Aircraft serial: 47260
- System (JASC): [2130 · Cabin Pressure Control System](https://openairdocs.org/jasc/2130)
- Part: Duct
- Part number: 71145730016
- Part serial: NA
- Condition: Torn
- Location: Tail Compartment
- Stage of operation: CR
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AT0200046

## Discrepancy

AIRCRAFT WOULD NOT MAINTAIN CABIN ALTITUDE/PRESSURE IN AUTOMATIC OR MANUAL MADE AT FL290.   A/C DESCENDED LOWER TO ENABLE MANUAL PRESURIZATION; THUS NORMAL/OPTIMUM CABIN ALT/PRESSURE FOR CREW AND PASSENGERS.   ALL MASKS FELL.             CORRECTIVE ACTION:          REMOVED AND REPLACED RIGHT PRESSURE VALVE DUCT; FORWARD RELIEF VALVE, AND RIGHT AIR CYCLE MACHINE.

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