Wiktionary
cowl flaps
n. (plural of cowl flap English)
Usage examples of "cowl flaps".
He checked to see that the fuel selector switch was on the main tank and that the cowl flaps were open.
Scott's trained hand closed the cowl flaps and retarded the throttle on the smoking engine.
He set the mixture control into Auto Rich, opened the cowl flaps, and lowered the wing flaps.