K & N air filters, K and N aircraft air filters, K&N airfilter advisory, K & N airfilter goes into propeller.

 Light Sport & Ultralight Aircraft Information
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Airfield

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Incident report:
The engine installed in this aircraft was a "Hirth Model 2706," and the propeller was a "Tennessee Model 58/46." An abnormal noise was heard during flight, and the propeller failed. An off airport landing was made. The aircraft sustained substantial damage.

During an investigation, an engine air cleaner assembly was discovered to be missing. The submitter speculated that the air cleaner assembly came loose, struck the propeller, and caused this failure.

The air cleaner was a "K&N Model," and a part number was not available. Prior to flight, the engine/propeller components should be closely inspected for security.

Part total time-96 hours.

Suggestion:
K & N airfilters supplied for AIRCRAFT use have tabs built into the filter for connecting the airfilter to the carburetor using safety wire.

It is necessary to drill the small flat plate on the rear of the Bing 54 carb to allow insertion of the safety wire.

The above photo shows the suggested way to safety wire the airfilter. Note that the owner has also run safety wire to the chrome airfilter cover plane, which has been reported to come off filters from aircraft while in flight.