What was found
MAIN WHEEL WELL, STA 663 RBL 35, UPPER VERTICAL PRESSURE WEB HAS POSSIBLE CRACK. GROUNDED - YES. ACCOMPLISHED HFEC INSPECTION OF THE VERTICAL PRESSURE DECK WEB AT BS 663, RBL 25 - RBL 45 IAW B737 NDTM PART 6 51-00-00 PROCEDURE 23, FOUND A CRACK 1.500" IN THE CENTER CHEM-MILLED POCKET AT RBL 35. CUT AND REMOVED THE DAMAGE PART OF THE WEB AND ACCOMPLISHED A CATEGORY "B" REPAIR OF THE WING CENTER SECTION REAR SPAR VERTICAL PRESSURE DECK WEB IAW B737-900 SRM 57-10-10-2R-3 REPAIR 3, ALTERNATIVE 1. THE INSPECTION THRESHOLD FOR THIS CATEGORY "B" REPAIR IS 56,000 FLIGHT CYCLES AFTER REPAIR INSTALLATION IAW TABLE 203 ALTERNATIVE 1. DOT C690.