What was found
IAH - DURING C-CHECK INSPECTON, THE INTERCOSTAL BETWEEN FRAMES 38 AND 39 RIGHT WAS FOUND TO BE CORRODED. MAINTENANCE REMOVED AND REPLACED THE INTERCOSTAL IAW ATR42-SRM 51-24-01, 51-21-28, AND 51-25-04, AND THE AIRCRAFT WAS APPROVED FOR RETURN TO SERVICE. (M)