# SDR DXTA2011080904699

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 9, 2011
- Submitted: August 10, 2011
- Operation: Air carrier
- Aircraft: [N946QS](https://openairdocs.org/aircraft/N946QS), registered now
- Make and model: Cessna 750
- Registry model: [Cessna 750](https://openairdocs.org/model/cessna-750) (OpenAirDocs)
- Aircraft serial: 7500195
- Aircraft time: 8,227 hours, 5,021 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: A/C Pack
- Part number: 73838433
- Part serial: 200009152A
- Condition: Failed
- Location: Aft
- Part time: 1,016 hours, 617 cycles
- Stage of operation: CR
- How discovered: O
- Nature of condition: B
- Precautionary procedure: H
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DXTA2011080904699

## Discrepancy

ODOR OF FUMES EMITTED INTO COCKPIT SUDDENLY AT CRUISE. TURNING OFF COCKPIT A/C PACK STOPPED THE FUMES.   INSPECTED COALESCERS & FOUND TO BE DIRTY. REMOVED DUCTING FOR FWD & AFT ACM TURBINES & FOUND DIRTY. FOUND AFT ACM TURBINE WILL NOT SPIN FREELY. R & R AFT ACM.   ACM OPS & LEAK CHECKED GOOD IAW MM 21-50-00.

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