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-18 CHECK EXFOLIATION CORROSION WAS FOUND ON FLOORBEAM BS 1016, LBL 4 TO LBL 16. MAINTENANCE REMOVED DAMAGED SECTION OF FLOORBEAM BS 1016, LBL 4 TO LBL 16; FABRICATED 2 EACH SUPPORT ANGLES & 4 EACH STRAPS; INSTALLED REPAIR PARTS IAW B737-300 SRM 53-00-51 FIG 202, PG 207 & 211.