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.