The U.S. aircraft register, updated daily
Engines · piston (reciprocating) · data as of October 5, 2026

Lycoming O-235-C1A

2 aircraft on the U.S. register carry a Lycoming O-235-C1A engine, rated at about 100 horsepower. The Aeronca 7 Champion (Champ) is the model most often fitted with it (1 aircraft). The aircraft carrying it were built between 1957 and 2008.

The FAA records engines by code, usually at the level of a series ("O-320 series") rather than the exact variant; this page gathers every FAA code that reads as Lycoming O-235-C1A. FAA spelling: O-235-C1A.

Fitted to model families

Aeronca 7 Champion (Champ)1Barrett Bruce M STOLP STARLET SA5001

Aeronca 7 Champion (Champ) · Barrett Bruce M STOLP STARLET SA500

Where they are owner's state

Ohio1Illinois1

Kind of aircraft

Piston singles2 (100%)

When the aircraft were built by decade

000111195012000

What the FAA has certified, ordered and been told about the Lycoming O-235-C1A the component layer

The design is held under 1 type certificate (E-223, held by Lycoming Engines). The FAA has issued 12 airworthiness directives (orders that owners must comply with) that name this engine series.

FAA orders 12 airworthiness directives · newest first

2026-09-142026-17-10 · Reciprocating Engine Cylinder Section · engine
2026-04-082026-04-11 · Engine (Reciprocating) · engine
2024-12-052024-21-02 · Engine (Reciprocating) · engine
2012-03-272012-03-07 · Carburetor · engine
2004-06-252004-10-14 · Crankshaft gear · engine
1996-07-1596-09-10 · Oil pump · engine

All orders naming the Lycoming O-235-C1A

Certificates and bulletins

E-223Type certificate held by Lycoming Engines · 43 models listed · revised January 31, 2020

Safety bulletins 3 · advice, not orders

2019-05-02NE-19-08 · Reciprocating Engine Cylinder Section - Lycoming Engines Parallel Valve Cylinders
2014-03-24NE-14-13 · Reciprocating Engine - Cylinder Mounting Studs
2008-09-10NE-06-32R1 · Reciprocating Engine - Crankshaft

Sources: the FAA's type certificate data sheets, airworthiness directives, supplemental type certificates, special conditions and special airworthiness information bulletins (Dynamic Regulatory System), and the FAA's service difficulty reports. A failure report is what an operator or repair station chose to file; the counts show reporting as much as reliability, and larger and commercial fleets report more. How the systems are grouped.

Connections how this engine series links to the rest of the register

Fitted to
Where they are
Airworthiness

These connections as data: /graph/engine/lycoming-o-235-c1a.json · about the eFlight graph.

Aircraft newest certificates first · 2

Tail no.Maker and modelGroupOwner and baseCertificateRegisteredStatus
N1919E Aeronca
7AC
Fixed-wing, single engine Individual owner
Ohio
Standard 2024-08-17 ValidFAA registration status code V: Valid registration. All codes
N571MM Barrett Bruce M
STOLP STARLET SA500
Fixed-wing, single engine Individual owner
Illinois
Experimental 2013-03-04 ValidFAA registration status code V: Valid registration. All codes

Source: FAA Civil Aviation Registry, Releasable Aircraft Database (the engine reference table and each aircraft's engine code), October 5, 2026. Horsepower and thrust are the FAA's figures for the series, not for a particular aircraft.