What was found
MCN - MAJOR REPAIR - DURING C-17 CHECK EXFOLIATION CORROSION WAS FOUND ON THE UPPER SURFACE OF FLOOR SUPPORT BETWEEN BS 947.5 AND BS 967, RBL 8. MAINTENANCE REMOVED FLOOR SUPPORT BETWEEN BS 947.5 TO BS 967, RBL 8; FABRICATED A NEW FLOOR SUPPORT, AND INSTALLED REPAIR IAW B737-300 SRM 51-40-05, PG. 1, 2, & 4, AND SRM 51-40-02, PG. 10-11.