What was found
THE LEFT AIRCRAFT LOW PRESSURE FUEL LIGHT CAME ON AS THE ENGINES WERE POWERED UP. TROUBLE SHOT LEFT FUEL SYSTEM AND FOUND THAT THE LOW PRESSURE FUEL FILTER GASKETS THAT ARE ATTACHED TO THE FILTER WERE NOT GLUED EVENLY ON THE ENTIRE SURFACE. THIS IN TURN MADE THE GASKET ACT AS A RESTRICTOR FOR THE OUTLET FUEL, AS THE ENGINE DEMANDED FOR FUEL INCREASED WITH RPM, THE RESTRICTION WAS GREAT ENOUGH TO DROP THE FUEL PRESSURE TO BELOW THE PRESSURE SWITCH LIMIT. INSPECTED THE REMAINING RIGHT FUEL FILTER AND FOUND THE SAME PROBLEM WITH THE GASKET. INSPECTED FUEL FILTERS IN COMPANY STOCK AND FOUND ALL FILTERS WITH THE SAME PROBLEM. REMOVED THESE FILTERS FROM STOCK AND NOTIFIED THE VENDER.