As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MCN - MAJOR REPAIR - DURING C-17 CHECK EXFOLIATION CORROSION WAS FOUND ON UPPER AND LOWER SURFACE OF FLOOR SUPPORT AT LBL 18, BETWEEN BS 979 AND BS 983, WL 208. MAINTENANCE REMOVED CORRODED FLOOR SUPPORT AT LBL 18, FROM BS 979 TO BS 983; FABRICATED A NEW REPLACEMENT FLOOR SUPPORT PER DWG 65-46812; INSTALLED REPAIR PARTS IAW B737-300 SRM 51-40-02.