# SDR DXTA2013120405589

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 16, 2013
- Submitted: December 4, 2013
- Operation: Air carrier
- Aircraft: [N975QS](https://openairdocs.org/aircraft/N975QS), registered now
- Make and model: Cessna 750
- Registry model: [Cessna 750](https://openairdocs.org/model/cessna-750) (OpenAirDocs)
- Aircraft serial: 7500175
- Aircraft time: 11,146 hours, 6,813 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Compressor
- Part number: 73828433
- Part serial: 2008030222A
- Condition: Faulty
- Location: Cockpit
- Part time: 1,569 hours, 978 cycles
- Stage of operation: CR
- How discovered: O
- Nature of condition: B
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DXTA2013120405589

## Discrepancy

ELECTRICAL ODOR NOTED ON DESCENT.  SUSPECTED COCKPIT PAC BECAUSE IT WAS DIFFICULT TO SET TEMP & HOLD IN AUTO OR MANUAL.  SELECTED COCKPIT PAC TO OFF & ODOR DISSIPATED.  REMOVED BAD COCKPIT TURBO COMPRESSOR PN 738284-33, SN & INSTALLED CRS SI3R842L.  REPAIRED TURBO COMPRESSOR PN 738384-33 & SN 9611062A.  SERVICED ENVIRONMENTAL CONTROL UNIT, OPERATIONS CHECKED NORMAL.  ALL WORK DONE IAW 750 MM CHAPTER 21-51-00.  COMPLIED WITH TASK CARD TC-750-21-12801 IMR 1, OPERATIONS CHECKED GOOD, LEAK CHECKED NORMAL.

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