Type certificate E-279
Held today by Lycoming Engines, earlier by Textron Lycoming, Avco Corporation. It covers 7 models; about 211 aircraft on the U.S. register are built to the designs it names. Last revised November 4, 2010 (revision 10). 9 FAA orders name its designs, and 25 approved modifications build on it.
Models under this certificate 7
VO-435-A1A (O-435-21), VO-435-A1F, VO-435-A1C (O-435-23; -23A; -23B; -23C), VO-435-A1E, VO-435-A1D (O-435-6A), VO-435-B1A, VO-435-A1B (O-435-6)
Engine series
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 9 · newest first
2026-04-082026-04-11 · Engine (Reciprocating) · engine
2024-12-052024-21-02 · Engine (Reciprocating) · engine
2022-08-152022-16-03 · Engine (RECIPROCATING) · engine
2012-03-272012-03-07 · Carburetor · engine
2004-06-252004-10-14 · Crankshaft gear · engine
1991-05-2890-04-06 R1 · Propeller Governor External Oil Line · engine
1980-08-1880-04-04 R1 · Crankshaft Flange Bolts · engine
1969-01-1666-06-03 · Connecting Rod Assemblies · engine
Approved modifications 25 · 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-279.json.