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Type certificate 1E15

Held today by Textron Lycoming Subsidiary of Textron INC., earlier by Textron Lycoming, Avco Corporation. It covers 12 models; about 129 aircraft on the U.S. register are built to the designs it names. Last revised February 15, 1988 (revision 6). 26 FAA orders name its designs, and 32 approved modifications build on it.

Models under this certificate 12

IO-720-B1A, IO-720-D1CD, IO-720-A1A, IO-720-B1B, IO-720-D1BD, IO-720-C1BD, IO-720-A1BD, IO-720-A1B, IO-720-C1B, IO-720-D1C, IO-720-D1B, IO-720-B1BD

Engine series

Lycoming IO-720 119 aircraftLycoming IO-720-A1B 8 aircraftLycoming IO-720-C1B 1 aircraftLycoming IO-720-D1CD 1 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 26 · newest first

2026-04-082026-04-11 · Engine (Reciprocating) · engine
2022-08-152022-16-03 · Engine (RECIPROCATING) · engine
2017-08-152017-16-11 · Reciprocating Engine Power Section · engine
2015-11-032015-19-07 · Fuel injector fuel lines · engine
2012-10-242012-19-01 · Crankshafts · engine
2012-01-252011-26-04 · Externally mounted fuel injector fuel lines · engine
2011-09-292011-18-09 · Crankshaft failure · engine
2011-08-162011-15-10 · Fuel servos · engine

Approved modifications 32 · companies holding the most

Continental Motors, INC. 5Riley Intl CORP 2Kelly Aerospace Energy Systems LLC 2General Aviation Modifications INC. 2B & C Specialty Products INC. 2Talco Aviation 1Superior Air Parts, INC 1Shell Development CO 1

Source: FAA type certificate data sheets (Dynamic Regulatory System); register counts from the FAA register of October 5, 2026. Connections as data: /graph/certificate/1E15.json.