Type certificate TC 199
Held today by Textron Lycoming Avco Corporation, earlier by Avco Corporation, Lycoming Division. It covers 2 models; about 538 aircraft on the U.S. register are built to it. 3 FAA orders name its designs, and 2 approved modifications build on it.
Models under this certificate 2
O-145-A1, O-145-A2
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 3 · newest first
2012-03-272012-03-07 · Carburetor · engine
1991-05-2890-04-06 R1 · Propeller Governor External Oil Line · engine
1969-01-1666-06-03 · Connecting Rod Assemblies · engine
Approved modifications 2 · 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/TC 199.json.