Special Conditions; Aerospatiale Model ATR-42 Series Airplane

These special conditions are issued pursuant to §§ 21.16 and 21.17 of the Federal Aviation Regulations (FAR) to Aerospatiale/Aeritalia, Toulouse, France, for a type certificate for the ATR-42 series airplane. The ATR-42 airplane will have novel or unusual design features associated with an automatic takeoff power control system (ATPCS) for which the applicable airworthiness regulations do not contain adequate or appropriate safety standards. The ATPCS will allow the airplane to take off with less than maximum takeoff thrust approved for the airplane; and, if an engine fails, the system will automatically provide maximum takeoff thrust on the operating engine. These special conditions contain safety standards which the Administrator finds necessary to establish a level of safety equivalent to that provided by the regulations applicable to the ATR-42 series airplane because of the novel or unusual features.