What was found
AD RELATED AA 5711-01036-CENTER WING FRONT SPAR VERTICAL STRINGERS, CRACKS FOUND ON FLOORBEAM SIDE VERTICAL RADIUS AT-Y765 ZONE 1 CRACK L= 0.250 INCHES APPROX AT ZONE 2 CRACK L= 0.400 INCH APPROX, REPAIR IS R EQUIRED PRIOR TO FUTHER FLIGHT. COMPLIED WITH ER/A 587692-14AD REV.B MATCHES WITH ALL STEPS ON ER/A 587692-14AD REV.B PRI REV.0 AND ER/A 587692-14AD REV.B PRIREV.1 IT HAS BEEN VALIDATED. PERFORMED REPAIR INSTRUCTIONS ON CENTER WING FRONT SPAR FR36 AT VERTICAL STIFFENER AND FLOOR BEAMAS PER ER/A 587692-14AD REV.B SECTION III HAS BEEN COMPLIED WITH. APPROVED DATE: 29-MAY-26. SEE LOG PAGE 1619499 FOR TIMECONTROLLED ITEMS SECTION IV: REPETITIVE INSPECTION WITHIN EVERY 11500FC/23000FH (WHICHEVER COMES FIRST) AFTER SECTION III. SEEINDIVIDUAL SIGN-OFF ON ORNRC 280/200. RII INSPECTION COMPLETE. (LP: 1621767, AIRCRAFT WAS GROUNDED)