As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE LEFT LOWER WING PLANK FUEL DRAIN FORWARD SCREW HOLE AT WS 85.5 HAD AN INDICATION WHILE PERFORMING EDDY CURRENT INSPECTION (FUEL BOOST PUMP DRAIN VALVE FORWARD SCREW HOLE). DRILLED THE SCREW HOLE TO .3125 INCH TO REMOVE THE INDICATION. FABRICATED AND INSTALLED A FREEZE PLUG IAW REO 601R-57-21-392.