As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING GROUND RUN AFTER OVERHAUL, AN OIL LEAK WAS NOTICED ORIGINATING FROM THE LOWER RT ATTACH POINT OF THE OIL FILTER ADAPTER. UPON CLOSE VISUAL INSPECTION A CRACK WAS FOUND IN THE RADIUS OF THE LOWER RT FLANGE. UNIT WAS REPLACED AND LEAK CHECKED. (TC NR 20070517001)