Description / Abstract: Reports on the investigation to determine potential interference effects to aircraft electronic systems due to emissions from self-powered portable electronic and electrical devices operated aboard aircraft. Recommends regulatory actions relating to operation and identification of passenger-operated devices to assure control of possible sources of interference and recommends standardized procedures for reporting suspected interference. Volume I is the basic report and includes background, data collection, data analysis, conclusions, and recommendations. Volume II provides amplification or background material for some of the summary data included in the basic report.