What was found
IAH - DURING C-CHECK INSPECTION, FOUND RIGHT SIDE FLOOR SUPPORT Z-CHANNEL CORRODED FROM FRAMES 39 TO 41. MAINTENANCE REMOVED AND REPLACED THE Z-CHANNEL IAW ATR-42 SRM 51-25-02. THE AIRCRAFT WAS APPROVED FOR RETURN TO SERVICE. TT: 17,852.4 HOURS. TC: 20,381. (X)