What was found
ANC - AIRPORT RAMP. AIRCRAFT OBSERVED TO BE LEAKING FUEL FROM THE LOWER TAIL SECTION WITHIN A FEW MINUTES FOLLOWING APU START. THE AIRCRAFT ENGINES WERE NOT STARTED. THE APU WAS SHUT DOWN WITHOUT FURTHER INCIDENT AND THE FLIGHT CANCELLED. INVESTIGATION REVEALED THE APU LOW-PRESSURE FUEL FILTER COVER MOUNTING EAR FAILED AT THE SCREW MOUNTING HOLE AND SEPARATED FROM THE FUEL CONTROL UNIT. (X)