What was found
SHV - DURING C-CHECK INSPECTION, THE LOWER RIGHT HAND APU COWLING MOUNT OPENING WAS FOUNDS TO BE CRACKED. MAINTENANCE STOP DRILLED THE CRACK, AND INSTALLED A REPAIR DOUBLER ON THE AFFECTED AREA IN ACCORDANCE WITH EMB-145 SRM 51-40-02, AND THE AIRCRAFT WAS APPROVED FOR RETURN TO SERVICE.