As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 1 ENGINE, AFTER COMPLETION OF FUEL FILTER CHANGE, LEAK CHECKED GOOD. PRIOR TO CLOSING COWLING FUEL STARTED TO LEAK FROM AREA ABOVE FUEL FILTER HOUSING, CAST MOLDED, TO FUEL PUMP. ACFT GROUNDED. REPLACED THE NR 1 FUEL PUMP PACKAGE IAW AMM 73-11-01-000/400-801. OPS TESTED GOOD WITH NO LEAKS NOTED.