As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
TEMPEST OIL FILTER THAT HAS THE INCORRECT TOP INSTALLED WITH OVERSIZED THREADS. THE THREADS SHOULD BE 3/4” - 16. AS SHOWN ON THE SIDE OF THE FILTER. THE TOP SHOWS THE THREADS THAT IT WAS MANUFACTURED WITH OF 13/16” - 16. RESEARCH SHOWS THAT TEMPEST OIL FILTER P/N: AA48103-2 SHOULD HAVE 13-16"-16 THREADS, NOT AA48108-2.