# SDR CA140908015

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 15, 2014
- Submitted: March 12, 2015
- Operation: General aviation
- Make and model: Beech 1900D
- Registry model: [Beech 1900D](https://openairdocs.org/model/beech-1900d) (OpenAirDocs)
- Aircraft time: 30,233 hours
- Engine: Pwa PT6A67B
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Acm
- Part number: 7756355
- Condition: Failed
- Stage of operation: TX
- 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/CA140908015

## Discrepancy

(CAN) ON START UP THE CREW NOTICED SMOKE IN THE COCKPIT & CABIN.  AFTER SOME TROUBLESHOOTING THE CREW SELECTED THE LT & RT ENVIRO SWITCHES TO THE OFF POSITION & THE SMOKE DISSIPATED.  THE ACFT WAS INSPECTED & DISPATCHED UNDER THE COMPANY`S MEL PROTOCOL REQUIREMENTS.  WHEN THE ACFT RETURNED FOR MAINTENANCE A POST INSPECTION WAS COMPLETED AND IT WAS DETERMINED THAT THE ACM WAS LEAKING OIL INTERNALLY. THE ACM WAS REPLACED WITH A SERVICEABLE UNIT.  HIGH POWER RUNS WERE PERFORMED AND SYSTEM FUNCTIONAL CHECKS COMPLETED WITH NO FAULTS FOUND.  THE ACFT WAS RETURNED TO SERVICE.

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