Special Conditions; Soloy Corporation, Soloy Dual Pac Engine (Formally Soloy Dual Pac, Inc.)

These special conditions are issued for the Soloy Corporation, Soloy Dual Pac engine (formally Soloy Dual Pac Inc.). This engine will have a novel design feature associated with its configuration. The Soloy Dual Pac engine is a propulsion system in which two Pratt & Whitney Canada (PWC) Model PT6 turbine engines are combined through a common gearbox to drive a single output propeller shaft. The Soloy Dual Pac engine is intended to provide a degree of continuous operation following the failure of one of the PWC Model PT6 engines. The applicable regulations do not contain adequate or appropriate safety standards for such a configuration. These special conditions contain the additional safety standards which the Administrator considers necessary to establish a level of safety equivalent to that established by the airworthiness standards of part 33 of the Federal Aviation Regulations (FAR).