# SDR AALA960691

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 28, 1996
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: [N428AA](https://openairdocs.org/aircraft/N428AA), registered now
- Make and model: Doug DC-9-82
- Registry model: [Doug DC-9-82](https://openairdocs.org/model/mcdonnell-douglas-dc-9-82) (OpenAirDocs)
- Aircraft serial: 49340
- System (JASC): [2130 · Cabin Pressure Control System](https://openairdocs.org/jasc/2130)
- Part: Controller
- Part number: 21171803
- Condition: Defective
- Location: Nr 1 Position
- Stage of operation: CR
- Nature of condition: O
- Precautionary procedure: B, G
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA960691

## Discrepancy

DTW - FLT 1302 - EN RUOTE DFW/DTW - DURING CRUISE AT FL 330, UNABLE TO MAINTAIN CABIN PRESSURIZATION.  ACCOMPLISHED EMERGENCY DESCENT, DROPPED ALL PASSENGER OXYGEN MASKS AND AIRCRAFT PROCEEDED TO DTW, LANDING WITHOUT INCIDENT.  REPLACED NR 1 PRESSURIZATION CONTROLLER.  ACCOMPLISHED PRESSURIZATION CHECK WITH NO DEFECTS FOUND.  PLACARDED PASSENGER OXYGEN SYSTEM AND AIRCRAFT RETURNED TO REVENUE SERVICE WITH ALTITUDE RESTRICTION.  SUBSEQUENTLY REPLACED OXYGEN CYLINDERS AND MASKS AT TUL/30.  ACCOMPLISHED DROP CHECK AND LEAK CHECKS WITH NO DEFECTS FOUND.  OXYGEN SYSTEM PLACARD REMOVED.  (M)

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