Airworthiness Directives; Construcciones Aeronauticas, S.A. (CASA) Model C-212 Series Airplanes

This amendment adopts a new airworthiness directive (AD), applicable to certain CASA Model C-212 series airplanes, that requires a one-time inspection of the lower shaft and support structure of the rudder for corrosion, repair of any discrepancy found, and modification of the structure. This amendment is prompted by issuance of mandatory continuing airworthiness information by a foreign civil airworthiness authority. The actions specified by this AD are intended to prevent corrosion from developing in the lower shaft and support structure of the rudder, which could result in the failure of the rudder lower shaft and consequent reduced controllability of the airplane.