Can portable electronic devices (PEDs) interfere with aircraft systems?

Passengers requested to be allowed to work onboard of airplanes with PEDs of any kind. But this comfort is acceptable only if the airplanes are protected in such a way that all interferences of PEDs with aircraft systems, especially with flight critical systems are impossible. This paper report of PED measurements performed in the context of the European research programme EMHaz. The result is a new overall limit curve of PED emissions. Based on this limit curve, the threat of coupling into antennas and into installed cable looms for helicopters is investigated and the possible effects and functional influences on aircraft systems are deduced.