Type certificate 1E4

Held today by Lycoming Engines, earlier by Textron Lycoming, Textron Lycoming, Textron Lycoming, Textron Lycoming, Textron Lycoming, Textron Lycoming, Textron Lycoming, Textron Lycoming, Textron Lycoming, Textron Lycoming, Textron Lycoming, Textron Lycoming, Textron Lycoming, Textron Lycoming, Textron Lycoming, Textron Lycoming, Textron Lycoming, Textron Lycoming, Textron Lycoming, Textron Lycoming, Textron Lycoming, Textron Lycoming, Textron Lycoming, Textron Lycoming, Textron Lycoming, Textron Lycoming, Textron Lycoming, Textron Lycoming, Textron Lycoming, Textron Lycoming, Textron Lycoming, Textron Lycoming, Textron Lycoming, Textron Lycoming, Textron Lycoming, Textron Lycoming, Textron Lycoming, Textron Lycoming, Textron Lycoming, Textron Lycoming, Textron Lycoming, Textron Lycoming, Textron Lycoming, Textron Lycoming, Textron Lycoming, Textron Lycoming, Textron Lycoming, Textron Lycoming, Textron Lycoming, Textron Lycoming, Textron Lycoming, Textron Lycoming, Textron Lycoming, Textron Lycoming, Textron Lycoming, Textron Lycoming, Textron Lycoming, Textron Lycoming, Textron Lycoming, Textron Lycoming, Textron Lycoming, Textron Lycoming, Textron Lycoming, Textron Lycoming, Textron Lycoming, Textron Lycoming, Textron Lycoming, Textron Lycoming, Textron Lycoming, Textron Lycoming, Textron Lycoming, Textron Lycoming, Textron Lycoming, Textron Lycoming, Textron Lycoming, Textron Lycoming, Textron Lycoming, Textron Lycoming. It covers 81 models; about 7,549 aircraft on the U.S. register are built to the designs it names. Last revised February 28, 2018 (revision 26). 54 FAA orders name its designs, and 70 approved modifications build on it.