As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING C-04 CHECK 1 INCH SCATTERED SPOTS OF CORROSION WERE FOUND ON FLOORBEAM ADJACENT TO THE R-1 DOOR, BS 311 TO BS 327. MAINTENANCE REMOVED CORROSION AND FOUND MATERIAL LOSS TO BE OUT OF LIMITS; REMOVED DAMAGED FLOORBEAM BS 311 TO BS 327; FABRICATED A NEW REPLACEMENT FLOORBEAM PER DWG 65-45875-74; INSTALLED REPAIR PART IAW B737-300 SRM 53-10-15, PG. 14-15.