Textron Aviation has released Service Bulletin SEB-21-02, which concerns replacement of the avionics cooling fan on Cessna 206 and T206 models. The original avionics fan is obsolete. When replaced, a modification is needed to the wiring and fan for correct installation. The bulletin is not mandatory and can be done at the owner’s discretion.

Affected serial numbers:

206H: 20608017 and On

T206H: T20608022 and On

Click here to download or read this Service Bulletin