As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON CLIMB-OUT FOR FLIGHT ADN5 OUT OF MIA, NOTICED OIL QUANTITY STARTED TO DROP AFTER LEVELING OFF, OIL COULD BE SEEN COMING OUT OF DRAIN MAST. SHUT DOWN NR 3 ENGINE AND COMPLETED AIR TURN BACK TO MIA. FOUND FUEL HEATER STRAINER DEFECTIVE, REPLACED UNIT, PERFORMED OPS CHECK AND LEAK CHECK, OPERATED NORMAL PER MM CH 73. (M)