As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT LOWER WING PLANK IS CORRODED UNDER PANEL 550HB AT FORWARD CENTER EDGE .600 INCH LONG BY .100 INCH WIDE BY .002 INCH DEEP, INBOARD EDGE 4 INCHES LONG BY .050 INCH WIDE BY .003 INCH DEEP, OUTBOARD SIDE 4.5 INCH LONG BY .025 INCH WIDE BY .003 INCH DEEP. S/D - REPAIRED LT WING LOWER PLANK FUEL TANK ACCESS DOOR CUTOUT FOR PANEL S SCH B IAW BOMBARDIER, INC REO 601R-57-21-030. (M)