As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILETRYING TO TIGHTEN A NEW OIL FILTER ONTO ENGINE, THE FILTER WOULD GET PARTIALLY TIGHT THEN POP LOOSE. REMOVED OIL FILTER TO FIND CENTER MOUNTING STUD HAD BROKEN LOOSE. REMOVED OIL FILTER TO FIND CENTER MOUNTING STUD HAD BROKEN LOOSE AND STRIPPED THREADS WHERE IT IS SCREWED INTO THE OIL FILTER.