The phrase "engine fan" refers to a device that helps to cool down an engine by blowing air over it. It helps prevent the engine from overheating and keeps it running smoothly. Full definition
Also take care to assure your hands and arms stay well clear of engine fan, belts, and any other moving items. (mechanics.stackexchange.com)
U.S. airline regulators have ordered inspections on engine fan blades like the one that snapped off a Southwest Airlines plane. (cnbc.com)
«I would like to introduce the new rotary engine without electrification because I think that is what the rotary engine fans will want,» he said. (automobilemag.com)