What was found
THE LEFT LOWER WING PLANK HAS CORROSION AT THE FUEL TANK ACCESS CUTOUT FOR PANEL 550BB HOLE NR 10 AT WS 188.040 APPROX .005 INCH DEEP BY 2.75 INCH LONG IN THE CRITICAL AREA ON THE FORWARD HOLE EDGE AND APPROX .005 INCH DEEP BY 1.25 INCH LONG IN THE CRITICAL AREA ON THE AFT EDGE. MAINTENANCE REPAIRED FUEL TANK ACCESS HOLE CUTOUT WING PLANK IAW BOMBARDIER REO 601R57-57-21-030 REV D. (M)