As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) ON A ROUTINE INSPECTION, THE AME NOTICED AN 1.5" CRACK UNDER THE PROPELLER GOVERNOR EXTENDING DOWN TOWARD THE STARTER MOUNTING PLATE. DESPITE EXTENSIVE RESEARCH WE HAVE NOT BEEN ABLE TO COME UP WITH A ROOT CAUSE ON TO WHY THE CRACK HAPPENED IN SUCH AN UNUSUAL PLACE.