What was found
IAH - DURING C-CHECK INSPECTION, THE FLOOR BEAM SUPPORTS AT THE SERVICE DOOR THRESHOLD WERE FOUND CORRODED. MAINTENANCE REMOVED AND REPLACED THE AFFECTED SUPPORTS IAW ATR42-320 SRM 51-25-01, AND THE AIRCRAFT WAS APPROVED FOR RETURN TO SERVICE. ACFT TT: 19271.5 HOURS. CYCLES: 22,334. (X)