# SDR DXTA200500949

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 1, 2005
- Submitted: September 8, 2005
- Operation: Air carrier
- Aircraft: [N923QS](https://openairdocs.org/aircraft/N923QS), registered now
- Make and model: Cessna 750
- Registry model: [Cessna 750](https://openairdocs.org/model/cessna-750) (OpenAirDocs)
- Aircraft serial: 7500023
- Aircraft time: 7,266 hours, 4,597 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Acm
- Part number: 73838431
- Part serial: 9904276
- Condition: Stiff
- Location: Cockpit
- Part time: 4,069 hours, 2,479 cycles
- Stage of operation: CR
- How discovered: O
- Nature of condition: B
- Precautionary procedure: B
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DXTA200500949

## Discrepancy

NOTICED A PUNGENT SUFFER ODOR IN THE COCKPIT WHILE AT FL410 IN CRUISE POWER, ODOR SEEMS TO COME AND GO.  ACCOMPLISHED AN EMERGENCY DESCENT AND LANDING W/O FURTHER INCIDENT.  FOUND COCKPIT ACM VERY STIFF TO TURN.  REPLACED ACM IAW 750 MAINTENANCE MANUAL CHPT 21-51-00.

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