# SDR 29GA93521053012A

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 30, 2012
- Submitted: June 1, 2012
- Operation: Air carrier
- Aircraft: N81535
- Make and model: Beech 1900D
- Registry model: [Beech 1900D](https://openairdocs.org/model/beech-1900d) (OpenAirDocs)
- Aircraft serial: UE147
- Aircraft time: 31,478 hours, 40,044 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Acm
- Part number: 7756355
- Part serial: 950240
- Condition: Failed
- Stage of operation: AP
- 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/29GA93521053012A

## Discrepancy

ON SHORT FINAL, A BUZZING NOISE WAS HEARD AND BURING ODOR COMING FROM CABIN WHEN BLEEDS TURNED OFF,  ODOR AND NOISE STOPPED.  REPLACED AIR CYCLE MACHINE,  OPERATIONAL CHECKED GOOD.  NO BURNING ODOR WAS PRESENT.

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