As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
INSTALLED AN O/H ENGINE ONTO THE RT POSITION. UPON PERFORMING AN OIL FILTER CHECK THE VERY NEXT DAY, AFTER AIRCAFT RUNS ON 7/27/04. FOUND THAT THE ENGINE DRIVEN FUEL PUMP HAD BLUE STAINS AROUND BODY HOUSING AND ALSO NOTICED FUEL LEAKING FROM DRAIN END OF THE DRIVE SECTION OF THIS FUEL PUMP. (SO05200410029)