title: Category "A" operations for twin-engine helicopters.
authors: Madison Air Care, University of Wisconsin-Madison.
authors: C
authors: C
authors: Lunaas
mesh_terms: D000401:Aircraft / Q000295:instrumentation*; D000552:Ambulances / Q000592:standards*; D001359:Aviation / Q000592:standards*; D003657:Decision Making; D014481:United States