As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING C-CHECK, THE LT AND RT SIDE Z-FLOOR SUPPORT WAS FOUND CORRODED BEYOND LIMITS AFT OF FRAME 39. MAINTENANCE REMOVED AND REPLACED THE CORRODED Z-FLOOR SUPPORTS IAW SRM. AIRCRAFT WAS RELEASED FROM C-CHECK ON MARCH 21,2004. (ASOA04367)