# SDR TWAA9906402

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 2, 1999
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: [N987Z](https://openairdocs.org/aircraft/N987Z), registered now
- Make and model: Doug DC-9-31
- Registry model: [Doug DC-9-31](https://openairdocs.org/model/douglas-dc-9-31) (OpenAirDocs)
- Aircraft serial: 47137
- System (JASC): [2131 · Cabin Pressure Controller](https://openairdocs.org/jasc/2131)
- Part: Controller
- Part number: 10256862
- Condition: Worn
- Location: Cabin
- Stage of operation: CR
- Nature of condition: G, J
- Precautionary procedure: B
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/TWAA9906402

## Discrepancy

AIRCRAFT LOST CABIN PRESSURIZATION AT FL 350.  OXYGEN MASKS DROPPED AUTOMATICALLY.  ACCOMPLISHED EMERGENCY DESCENT AND LANDED AT SCHEDULED STATION, AUS.  DEFERRED AUTO PRESSURIZATION CONTROL PER MEL AND OPERATED TO STL.  AT STL REPLACED THE AUTO PRESSURIZATION CONTROLLER AND PERFORMED A HULL LEAK CHECK AND TEST.  CHECK-C 4-21-99 STL.

---
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.