Type certificate E-202
Held today by Textron Lycoming Avco Corporation, earlier by Avco Corporation, Lycoming Division. It covers 5 models; about 240 aircraft on the U.S. register are built to the designs it names. Last revised March 10, 1994 (revision 4). 5 FAA orders name its designs, and 7 approved modifications build on it.
Models under this certificate 5
R-680-E2, R-680-E1, R-680-E3A, R-680-E3B, R-680-E3
Engine series
Lycoming R-680E1 1 aircraftLycoming R680E series 225 aircraftLycoming R680E3A 1 aircraftLycoming R680E3B 13 aircraft
The data sheet on the FAA's site: the approved engines and propellers, weights, speeds and limits for each model.
FAA orders on these designs 5 · newest first
2012-03-272012-03-07 · Carburetor · engine
2004-06-252004-10-14 · Crankshaft gear · engine
1996-01-2495-26-02 · Aviation Gasoline · engine
1991-05-2890-04-06 R1 · Propeller Governor External Oil Line · engine
1969-01-1666-06-03 · Connecting Rod Assemblies · engine
Approved modifications 7 · companies holding the most
Source: FAA type certificate data sheets (Dynamic Regulatory System); register counts from the FAA register of October 5, 2026. Connections as data: /graph/certificate/E-202.json.