Transport i infrastruktura · 27/12/1994

Special Condition: Bell Helicopter Textron Model 222U Helicopter, Electronic Flight Instrument System

This notice proposes a special condition for the Bell Helicopter Textron, Inc., Model 222U helicopter modified by Heli-Dyne Systems, Inc. This helicopter will have a novel or unusual design feature associated with the Electronic Flight Instrument System. The applicable airworthiness regulations do not contain adequate safety standards for the protection of these critical function systems from the effects of external high intensity radiated fields (HIRF). This notice contains the additional safety standards that the Administrator considers necessary to establish a level of safety equivalent to that established by the airworthiness standards of part 29 of the Federal Aviation Regulations.