What was found
DURING INSPECTION CORROSION WAS FOUND ON THE CABIN FLOOR STRUCTURE LEFT AND RIGHT WING BOX STRAP BETWEEN FRAMES 49 AND 50. MAINTENANCE PERFORMED A THICKNESS MEASUREMENT BY ULTRASOUND INSPECTION ON REWORKED AREAS PER NDI MANUAL INTRO P.22-F MINIMUM MATERIAL REMAINING WAS 0.081 ON THE RIGHT SIDE AND 0.094 ON THE LEFT SIDE. HIGH FREQUENCY EDDY CURRENT INSPECTION PERFORMED ON BOTH SIDES IN ACCORDANCE WITH NDI MANUAL INTO P.17-E, NO CRACKS FOUND. THE CABIN FLOOR STRUCTURE LEFT AND RIGHT BOX STRAP BETWEEN FRAMES 49 AND 50 WERE BLENDED IN ACCORDANCE WITH ETD 2011-45/100856 WITH NO FURTHER DEFECTS NOTED.