# SDR 9810959921

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 20, 1998
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: N943N
- 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: 47647
- System (JASC): [2130 · Cabin Pressure Control System](https://openairdocs.org/jasc/2130)
- Part: Pressurization
- Condition: Malfunctioned
- Location: Cabin
- Stage of operation: CL
- Nature of condition: J
- Precautionary procedure: A, G
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/9810959921

## Discrepancy

LOSS OF CABIN PRESSURIZATION OCCURRED AFTER TAKEOFF AT 15000 FEET.  CABIN ALTITUDE WAS PEGGED OUT AND OXYGEN MASKS WERE DEPLOYED THROUGHOUT CABIN.  FLIGHT ATTENDANT ALSO REPORTED SMOKE IN CABIN.  CREW DECLARED AN EMERGENCY AND AIRCRAFT WAS RETURNED TO DTW WITHOUT INCIDENT.  MAINTENANCE REPLACED LEFT AND RIGHT TURBINE INLET SWITCHES, COMPRESSOR DISCHARGE SWITCHES, PRESSURE CONTROLLER, PRESSURE AMPLIFIER, AND OUTFLOW VALVE ACTUATOR.  OPERATIONAL CHECK NORMAL.  AIRCRAFT RETURNED TO SERVICE.

---
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.