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

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The FAA proposes to adopt a new airworthiness directive (AD) for certain CASA Model C-212-CC series airplanes. This proposed AD would restrict the operation of the airplane to carrying either passengers or cargo (but not both) in the same compartment, unless the airplane is modified to include an approved protective liner between the passengers and the cargo. This proposed AD is prompted by our determination that affected airplanes, when carrying both cargo and passengers in the same compartment, cannot achieve the required level of performance. We are proposing this AD to prevent a hazardous quantity of smoke, flames, and/or fire extinguishing agent from the cargo compartment from entering a compartment occupied by passengers or crew.