PA28161 Cabin Blower Expelling Fine Debris

[N2897M]

Hi All,

Looking for a little advice. When I turn my cabin blower ON, I notice very fine brown particles originating from the upper vents collecting on the seats. It's not much, but has been persistent. The ducting back to the rear bulkhead has been cleaned.

Anyone have an idea what the source may be?

Thanks.

 

[kshaw]

 

[N2897M]