Type certificate E4SO
Held today by Continental Aerospace Technologies, INC., earlier by Continental\Teledyne Continental Motors. It covers 3 models; about 3 aircraft on the U.S. register are built to the designs it names. Last revised June 1, 2020 (revision 4). 15 FAA orders name its designs, and 8 approved modifications build on it.
Models under this certificate 3
TSIOL-550-A, TSIOL-550-B, TSIOL-550-C
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 15 · newest first
2023-03-152023-05-16 · Reciprocating Engine Power Section · engine
2023-02-232023-04-08 · Reciprocating Engine Power Section · engine
2023-02-172023-02-12 · Engine Air Intake System · engine
2022-08-152022-16-03 · Engine (RECIPROCATING) · engine
2016-09-152016-16-12 · Cylinder assemblies · engine
2012-02-242012-03-06 · Fuel servo diaphragm · engine
2010-06-162010-11-04 · Hydraulic lifters · engine
2004-05-052004-08-10 · Serial-numbered (SN) cylinders · engine
Approved modifications 8 · 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/E4SO.json.