What was found
MCN - MAJOR REPAIR - DURING C-17 CHECK A CRACK WAS FOUND ON THE OUTBOARD SIDE OF AFT CARGO FLOOR TRACK FLANGE, BS 767, RBL 15. MAINTENANCE REMOVED DAMAGED SECTION OF FLOOR TRACK, FABRICATED A NEW SECTION OF FLOOR TRACK, AND INSTALLED REPAIR IAW B737-300 SRM 51-40-02, PG 2-4, 10-11, 16-19, 38, AND SRM 51-40-05 PG 4-5.