Special Conditions: Garmin International Inc.; Cessna Model 182T/T182T Airplane; Installation of Electronic Flight Instrument System and the Protection of the System From High Intensity Radiated Fields (HIRF)

These special conditions are issued for Garmin International Inc., 1200 E. 151st St., Olathe, KS 66062, for a Supplemental Type Certificate on the Cessna Model 182T/T182T airplanes. These airplanes, as modified by Garmin, will have a novel or unusual design feature(s) associated with the installation of a Garmin GFC-700 digital autopilot system. These special conditions address the protection of these systems from the effects of high intensity radiated field (HIRF) environments. The applicable airworthiness regulations do not contain adequate or appropriate safety standards for this design feature. These special conditions contain the additional safety standards that the Administrator considers necessary to establish a level of safety equivalent to that established by the existing airworthiness standards.