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Type certificate 1E13

Held today by Lycoming Engines, earlier by Textron Lycoming, Avco Corporation, Textron Lycoming\Avco Corporation. It covers 11 models; about 228 aircraft on the U.S. register are built to the designs it names. Last revised November 4, 2010 (revision 8). 11 FAA orders name its designs, and 14 approved modifications build on it.

Models under this certificate 11

TVO-435-D1B, TVO-435-A1A, TVO-435-E1A, O-435-25, TVO-435-C1A, TVO-435-B1B, TVO-435-B1A (O-435-25A), TVO-435-G1B, TVO-435-D1A, TVO-435-F1A, TVO-435-G1A

Engine series

Lycoming O-435A/O-435C 135 aircraftLycoming TVO-435-A1A 1 aircraftLycoming TVO-435-D1A 2 aircraftLycoming TVO-435-F1A 1 aircraftLycoming TVO-435-G1A 1 aircraftLycoming TVO-435-GIA 88 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 11 · newest first

2026-04-082026-04-11 · Engine (Reciprocating) · engine
2024-12-052024-21-02 · Engine (Reciprocating) · engine
2022-08-152022-16-03 · Engine (RECIPROCATING) · engine
2012-03-272012-03-07 · Carburetor · engine
2010-04-192010-07-08 · Turbochargers · engine
2004-06-252004-10-14 · Crankshaft gear · engine
1996-01-2495-26-02 · Aviation Gasoline · engine
1991-05-2890-04-06 R1 · Propeller Governor External Oil Line · engine

Approved modifications 14 · companies holding the most

Shell Development CO 1Phillips Petroleum CO 1Perrigo & Steele Aircraft Engr Company 1Mobil Research & Development CORP 1Ly-Con Rebuilding Company 1Kling Oil Company 1General Aviation Modifications INC. 1Exxon Company USA 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/1E13.json.