What was found
THE LEFT LOWER WING PLANK HAS CORROSION AT THE FUEL TANK ACCESS CUTOUT FOR PANEL 510AB HOLE NR 3 AT WS 32.263 APPROX .003 INCH DEEP BY .4 INCH LONG IN THE CRITICAL AREA OF THE FORWARD HOLE EDGE AND .003 INCH DEEP BY .4 INCH LONG IN THE CRITICAL AREA OF THE AFT HOLE EDGE. MAINTENANCE REPAIRED FUEL TANK ACCESS HOLE CUTOUT WING PLANK IAW BOMBARDIER INC REO 601R-57-21-030 REV D. (M)