What was found
PILOT NOTED THAT RIGHT ALTERNATOR FAILED IN FLIGHT. POST FLIGHT INSPECTION FOUND ENGINE GEAR, ALTERNATOR DRIVE, RETAINING BOLTS WERE NOT INSTALLED AND TWO WERE FOUND RESTING ON THE ALTERNATOR MOUNTING POINT INSIDE ENGINE CASE. OTHER TWO BOLTS WERE NOT FOUND, FOUR BOLT RETAINING CLIPS WERE ALSO NOT FOUND. IT IS SUSPECTED THAT THESE ITEMS WERE DESTROYED. STEAL, ALUMINUM AND BRASS SHAVING WERE DISCOVERED IN THE ENGINE OIL FILTER. ENGINE DRIVEN ALTERNATOR GEAR SEPARATED/FREE FLOATING AND EXTENSIVE FOD DAMAGE WAS NOTED. ALTERNATOR DRIVE BEARING WAS SHEARED FROM SHAFT AND ENGINE CASE HAD CHIPS AND SCRAPING.