What was found
CENTER WING JOINT AT FRAME 40 LT, UPPER FASTENER HOLE FOUND CRACK SIGNAL. COMPLIED WITH EA 6-5710-T0322811 P 1. REPAIR CATEGORY IS B. THRESHOLD INTERVAL 2250 FC & 4860 FH. METHOD IN THE REPAIRED HOLE, ROTO TEST IAW NTM 51-10-01, BASED ON NTM 57-10-39 PART 6 PROCEDURE AFTER FASTENER & BRUSHERS REMOVAL. MAJOR REPAIR IAW GMM 6-2-100.