# SDR USAAD01133

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 8, 2001
- Submitted: July 31, 2001
- Operation: Air carrier
- Aircraft: [N801US](https://openairdocs.org/aircraft/N801US), registered now
- Make and model: Doug DC-9-81(MD-81)
- Registry model: [Doug DC-9-81(MD-81)](https://openairdocs.org/model/mcdonnell-douglas-dc-9-81-md-81) (OpenAirDocs)
- Aircraft serial: 48037
- System (JASC): [2131 · Cabin Pressure Controller](https://openairdocs.org/jasc/2131)
- Part: Controller
- Part number: 21171802
- Condition: Failed
- Location: Cabin Pressure
- Part time: 7,908 hours
- Stage of operation: CR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: B
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/USAAD01133

## Discrepancy

TPA-PIT - FLT 302 - THE CABIN ALTITUDE WARNING LIGHT ILLUMINATED AT 28,000 FEET.  THE CREW STARTED AN EMERGENCY DESCENT BUT THE OXYGEN MASKS DEPLOYED.  THE OXYGEN MASKS ABOVE SEATS 1A AND C DID NOT DEPLOY.  THE AIRCRAFT LANDED AT ITS DESTINATION WITHOUT INCIDENT.  MAINTENANCE REPLACED THE NR 2 PRESSURIZATION CONTROLLER AND ADJUSTED THE OXYGEN MASK RELEASE LATCH FOR SEAT 1A AND C.  (M)

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