# SDR DXTA200500829

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 8, 2005
- Submitted: July 14, 2005
- Operation: Air carrier
- Aircraft: [N956QS](https://openairdocs.org/aircraft/N956QS), registered now
- Make and model: Cessna 750
- Registry model: [Cessna 750](https://openairdocs.org/model/cessna-750) (OpenAirDocs)
- Aircraft serial: 7500156
- Aircraft time: 4,221 hours, 2,686 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Cooling Turbine
- Part number: 73838433
- Part serial: 9908084
- Condition: Failed
- Location: Aft Service Bay
- Part time: 4,221 hours, 2,686 cycles
- Stage of operation: CR
- How discovered: O
- Nature of condition: B
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DXTA200500829

## Discrepancy

SMOKE BURNT OIL SMELL COMING FROM ENVIRONMENTAL SYSTEM.  WORSE ON DESCENT.  REMOVED AND REPLACED FAILED ACM TURBINE.  OPERATIONAL CHECK GOOD IAW CE-750 M/M CH 21-51-00.

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