Type certificate E-253
Held today by Continental Aerospace Technologies, INC., earlier by Continental\Teledyne Continental Motors. It covers 8 models; about 8,517 aircraft on the U.S. register are built to the designs it names. Last revised September 19, 2022 (revision 21). 13 FAA orders name its designs, and 41 approved modifications build on it.
Models under this certificate 8
C145-2, O-300-A, O-300-D, O-300-C, C145-2H, O-300-B, O-300-E, C145-2HP
Engine series
Continental C145-2 11 aircraftContinental C145-2H 1 aircraftContinental C145 series 1,828 aircraftContinental O-300-A 15 aircraftContinental O-300-B 2 aircraftContinental O-300-C 4 aircraftContinental O-300-D 31 aircraftContinental O-300 series 6,625 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 13 · newest first
2023-10-262023-17-04 · Reciprocating Engine Oil System · engine
2022-03-292022-04-04 · Reciprocating Engine Oil System · engine
2012-01-242011-26-07 · Engine · engine
2002-07-122002-13-04 · Magneto impulse coupling stop pin · engine
1998-10-1998-17-11 · Crankshafts · engine
1996-02-1394-05-05 R1 · Cylinder Rocker · engine
1995-11-2895-21-15 · Aviation Gasoline · engine
1993-08-1293-10-02 · Missing Cylinder Valve Retainer Key · engine
Approved modifications 41 · companies holding the most
Source: FAA type certificate data sheets (Dynamic Regulatory System); register counts from the FAA register of November 2, 2026. Connections as data: /graph/certificate/E-253.json.