The Lycoming O-540 is a family of air-cooled six-cylinder, horizontally opposed fixed-wing aircraft and helicopter engines of 541.5 cubic inches displacement, manufactured by Lycoming Engines. The eng
AEIO-540
Lycoming TEO-540
An LTIO-540 mounted on the right wing of a Piper Chieftain: The turbocharger can be seen in the upper right of the image.