What was found
LEFT WING LOWER PLANK ACCESS HOLE NR 2 FOR 510AB HAS CORROSION AT FORWARD SIDE AND OUTBOARD END IN AND OUT OF CRITICAL REGION. REPAIRED LEFT WING LOWER PLANK ACCESS HOLE NR 2 FOR 510AB AT FORWARD SIDE AND OUTBOARD END IN AND OUT OF CRITICAL REGION IAW BOMBARDIER REO 601R-57-21-030 REV H . REPAIRED AREA WILL REQUIRE A THRESHOLD INSPECTION AT 42780 FLIGHT CYCLES AND REPEATING AT 28,082 FLIGHT CYCLES IN ACCORDANCE WITH NON-DESTRUCTIVE TESTING MANUAL 57-21-149, PART 6.