 It will also leverage and focus resources for higher risk efforts with higher payoffs.General aviation, defined as all flying except the military services and commercial airlines, had fallen from its position of economic prominence in the late 1970s to record lows in the mid-1980s before recovering in the late 1990s.American GA aircraft production numbers declined down from 18,000 in 1978 to 954 in 1993, an all-time low.