# SDR CA990728044

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 29, 1999
- Submitted: March 26, 2000
- Operation: General aviation
- Make and model: Beech 99
- Registry model: [Beech 99](https://openairdocs.org/model/beech-99) (OpenAirDocs)
- Engine: Pwa PT6A28
- System (JASC): [2121 · Air Distribution Fan](https://openairdocs.org/jasc/2121)
- Part: Bearings
- Part number: K271B202EL
- Condition: Wrong Part
- Location: Blower Motor
- Component: Dynamicair, C308559A
- Stage of operation: IN
- Nature of condition: W
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CA990728044

## Discrepancy

(CAN) THIS UNIT WAS SENT TO OUR FACILITY FOR OVERHAUL DUE TO A FAILURE OF BEARINGS AND FAN SEPARATION.  IT WAS FOUND THAT THE BEARINGS INSTALLED IN THE MOTOR  WERE NOT OF THE MANUFACTURER'S TYPE.  THE BEARINGS FOUND IN THE MOTOR WERE FAFNIR P/N 202PPCA INSTEAD OF DYNAMIC P/N K271B-202EL.  IT COULD NOT BE DETERMINED IF THE FAN HUB FAILED BEFORE OR AFTER THE BEARING FAILURE.

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