What was found
IAH - DURING C-CHECK INSPECTION, THE PASSENGER DOOR THRESHOLD WAS FOUND CORRODED. MAINTENANCE REMOVED THE CORROSION, AND APPLIED REPAIR DOUBLERS IAW ATR42 SRM'S 51-21-42, 51-70-00, AND 51-25-02, AND THE AIRCRAFT WAS APPROVED FOR RETURN TO SERVICE. ACFT TT: 23,397. CYCLES: 24,780. (X)