As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FUEL LEAK DISCOVERED AFTER OPERATION ON RIGHT ENGINE COWLING. FUEL FILTER HOUSING O-RING WAS FOUND LEAKING. ON REPLACEMENT OF SEAL AND FILTER ONE OF THE COVER FASTENER BOLTS WAS FOUND PULLED OUT OF THE MAIN FILTER HOUSING. REPLACEMENT OF THE ENTIRE FUEL/OIL FILTER HOUSING WAS NEEDED.