Special Conditions: ST 2017RC-R, Installation of Pratt & Whitney Canada PT6-67D on Global Helicopter Technology, Inc. (GHTI), Restricted Category Model UH-1H, TC R00002RC, With Full Authority Digital Engine Control (FADEC)

This special condition is issued for Supplemental Type Certificate (STC), Project <greek-i> ST2017RC-R, the installation of a Pratt and Whitney PT6-67D Turbine Engine on Global Helicopter Technology Inc. (GHTI), Restricted Category, U.S. Army military surplus helicopter, Model UH-1H, type certificated under TC R00002RC. The installation of the PT6-67D on the Restricted Category UH-1H will have a novel or unusual design feature associated with the installation of the Full Authority Digital Engine Control (FADEC). The applicable airworthiness regulations do not contain adequate or appropriate safety standards to protect systems that perform critical functions from the effects of a high-intensity radiated field (HIRF). This special condition contains the additional safety standards that the Administrator considers necessary to ensure that critical functions of systems will be maintained when exposed to HIRF.