Type certificate E-229
Held today by Lycoming Division Avco Corporation, earlier by Avco Lycoming\Textron Lycoming, Avco Corporation. It covers 10 models; about 2,236 aircraft on the U.S. register are built to the designs it names. Last revised January 31, 2020 (revision 14). 9 FAA orders name its designs, and 34 approved modifications build on it.
Models under this certificate 10
O-290-D2, O-290-D, O-290-B, O-290-A, O-290-CP, O-290-AP, O-290-D2A, O-290-C, O-290-D2C, O-290-D2B
Engine series
Lycoming O-290-C 1 aircraftLycoming O-290-D 45 aircraftLycoming O-290-D2 58 aircraftLycoming O-290-D2B 6 aircraftLycoming O-290 series 2,126 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 9 · newest first
2026-04-082026-04-11 · Engine (Reciprocating) · engine
2012-03-272012-03-07 · Carburetor · engine
2004-06-252004-10-14 · Crankshaft gear · engine
1998-10-1998-17-11 · Crankshafts · engine
1991-05-2890-04-06 R1 · Propeller Governor External Oil Line · engine
1982-06-0781-18-04 R2 · Engine Oil Pump Driven Impeller and Shaft · engine
1977-08-1875-08-09 · Oil Pump Drive Shaft · engine
1969-01-1666-06-03 · Connecting Rod Assemblies · engine
Approved modifications 34 · companies holding the most
Source: FAA type certificate data sheets (Dynamic Regulatory System); register counts from the FAA register of October 30, 2026. Connections as data: /graph/certificate/E-229.json.