Engines · piston (reciprocating) · data as of October 7, 2026

Lycoming IO-320 series

1,707 aircraft on the U.S. register carry a Lycoming IO-320 series engine, rated at about 150 horsepower. The Piper PA-30 Twin Comanche is the model most often fitted with it (808 aircraft). The aircraft carrying it were built between 1956 and 2025.

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 IO-320 series. FAA spelling: IO-320 SERIES.

Fitted to model families

Piper PA-30 Twin Comanche808Bellanca 7 Citabria185Champion 7 Citabria and Champ135Bellanca 8 Decathlon and Scout124Piper PA-39 Twin Comanche C/R68Cessna 172 Skyhawk26Piper PA-28 Cherokee, Warrior, Archer and Arrow15Piper PA-18 Super Cub8Piper PA-22 Tri-Pacer and Colt4Pitts Special S-13Beechcraft D952Cessna 177 Cardinal2

Piper PA-30 Twin Comanche · Bellanca 7 Citabria · Champion 7 Citabria and Champ · Bellanca 8 Decathlon and Scout · Piper PA-39 Twin Comanche C/R · Cessna 172 Skyhawk · Piper PA-28 Cherokee, Warrior, Archer and Arrow · Piper PA-18 Super Cub · Piper PA-22 Tri-Pacer and Colt · Pitts Special S-1

Where they are owner's state

Texas153Florida146California144Georgia71Delaware59Washington54Illinois52Alabama49Michigan48Ohio46

Kind of aircraft

Piston twins882 (52%)Piston singles824 (48%)Gliders1 (0.1%)

When the aircraft were built by decade

What the FAA has certified, ordered and been told about the Lycoming IO-320 series the component layer

The design is held under 1 type certificate (1E12, held by Lycoming Engines). The FAA has issued 30 airworthiness directives (orders that owners must comply with) that name this engine series. Operators and repair shops have filed 43 failure reports with the FAA since 1995, 8 of them in the last ten years.

FAA orders 30 airworthiness directives · 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

2012-02-242012-03-06 · Fuel servo diaphragm · engine

2011-08-162011-15-10 · Fuel servos · engine

2009-02-092009-02-03 · Fuel injection servos · engine

All orders naming the Lycoming IO-320 series

Failure reports 43 since · what operators and shops told the FAA

Parts most often reported as the reports name them

Bolt12Spar5Carburetor2Servo2B-Nut1Bearing1Blade1Bulkhead1Capacitor1Commutator1

Latest reports

2025-06-30Impulse Coupling: destroyed

2023-12-09Hose Connector: disconnected

2022-11-02Bearing: worn

2022-02-24Carburetor: leaking

2021-04-30Exhaust Pipe: cracked

Certificates and bulletins

1E12Type certificate held by Lycoming Engines · 32 models listed · revised April 4, 2018

Safety bulletins 9 · advice, not orders

2019-05-02NE-19-08 · Reciprocating Engine Cylinder Section - Lycoming Engines Parallel Valve Cylinders

2016-05-13NE-08-32R1 · Propeller Governor Idler Gear Shaft Set Screw

2014-03-24NE-14-13 · Reciprocating Engine - Cylinder Mounting Studs

2012-11-21NE-13-06 · Pushrod Shroud Spring Retainers, Engine Components Part No. AEL14995, for Lycoming Engines 320,...

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

Piper PA-30 Twin Comanche 808 with this engine series
Bellanca 7 Citabria 185 with this engine series
Champion 7 Citabria and Champ 135 with this engine series
Bellanca 8 Decathlon and Scout 124 with this engine series
Piper PA-39 Twin Comanche C/R 68 with this engine series
Cessna 172 Skyhawk 26 with this engine series
Piper PA-28 Cherokee, Warrior, Archer and Arrow 15 with this engine series
Piper PA-18 Super Cub 8 with this engine series

Where they are

Texas 153 of these aircraft
Florida 146 of these aircraft
California 144 of these aircraft
Georgia 71 of these aircraft
Delaware 59 of these aircraft

Biggest operators

Southern Aircraft Consultancy INC Trustee 9 of these aircraft
International Air Services INC Trustee 7 of these aircraft
Plane Fun INC Tr Trustee 4 of these aircraft
Collum Aviation LLC 4 of these aircraft
Bas Part Sales LLC 4 of these aircraft

Airworthiness

FAA orders naming the Lycoming IO-320 series 30 airworthiness directives
Failure reports on the Lycoming IO-320 series 43 reports since 1995

Analytics

These connections as data: /graph/engine/lycoming-io-320-series.json · about the eFlight graph.

Aircraft newest certificates first · 1,707

Tail no.	Maker and model	Group	Owner and base	Certificate	Registered	Status
N8427Y	Piper PA-30	Fixed-wing, multi-engine	Individual owner Illinois	Standard	2000-06-16	Valid
N50JA	Piper PA-18-150	Fixed-wing, single engine	Individual owner New Mexico	Standard	2000-05-25	Valid
N7253Y	Piper PA-30	Fixed-wing, multi-engine	Individual owner Oklahoma	Standard	2000-04-26	Valid
N6369N	Champion 7KCAB	Fixed-wing, single engine	Individual owner Georgia	Standard	2000-04-25	Valid
N3757H	Hurd Phillip BAKENG DOUBLE DUCE	Fixed-wing, single engine	Individual owner Texas	Experimental	2000-03-27	Valid
N9196L	Bellanca 7KCAB	Fixed-wing, single engine	Co-owned owner California	Standard	2000-01-20	Valid
N15PJ	Breedlove Ernest Dale RV-6	Fixed-wing, single engine	Individual owner Texas	Experimental	2000-01-10	Valid
N13SH	Riter PITTS S1A	Fixed-wing, single engine	Individual owner Michigan	Experimental	2000-01-04	Valid
N84009	Cessna 172K	Fixed-wing, single engine	Co-owned owner California	Standard	1999-08-25	Valid
N8271Y	Piper PA-30	Fixed-wing, multi-engine	Individual owner Kansas	Standard	1999-08-10	Valid
N8926	Bellanca 7KCAB	Fixed-wing, single engine	Individual owner Georgia	Standard	1999-07-29	Valid
N7572F	Champion 7KCAB	Fixed-wing, single engine	Individual owner Arizona	Standard	1999-07-28	Valid
N88182	Bellanca 7KCAB	Fixed-wing, single engine	Co-owned owner Connecticut	Standard	1999-07-19	Valid
N545SM	Marsh Stephen RV-4	Fixed-wing, single engine	Individual owner California	Experimental	1999-06-30	Valid
N3XK	Keller Frederick H DEFIANT (KELLER)	Fixed-wing, multi-engine	Individual owner Wisconsin	Experimental	1999-06-16	Valid
N11868	Bellanca 7KCAB	Fixed-wing, single engine	Individual owner Minnesota	Standard	1999-05-18	Valid
N8605V	Bellanca 7KCAB	Fixed-wing, single engine	Individual owner North Dakota	Standard	1999-03-09	Valid
N82RJ	Piper PA-30	Fixed-wing, multi-engine	Individual owner Florida	Standard	1999-03-08	Valid
N7263Y	Piper PA-30	Fixed-wing, multi-engine	Rag Wings and Radials Aircraft Leasing LLC Georgetown, Delaware	Standard	1999-02-26	Valid
N8891Y	Piper PA-39	Fixed-wing, multi-engine	Great Plains Aero INC Iowa City, Iowa	Standard	1999-02-26	Valid
N7808Y	Piper PA-30	Fixed-wing, multi-engine	Individual owner California	Standard	1999-01-26	Valid
N1ME	Piper PA-30	Fixed-wing, multi-engine	Individual owner Florida	Standard	1998-12-21	Valid
N8653	Bellanca 7KCAB	Fixed-wing, single engine	Individual owner Colorado	Standard	1998-11-25	Valid
N8948Y	Piper PA-39	Fixed-wing, multi-engine	Individual owner New Jersey	Standard	1998-11-17	Valid
N18EN	Bellanca 7KCAB	Fixed-wing, single engine	Individual owner Delaware	Standard	1998-10-20	Valid
N8823Y	Piper PA-30	Fixed-wing, multi-engine	Individual owner Pennsylvania	Standard	1998-10-13	Valid
N214MM	Dunlap Lloyd A LANCAIR 360	Fixed-wing, single engine	Individual owner Michigan	Experimental	1998-07-21	Valid
N7277Y	Piper PA-30	Fixed-wing, multi-engine	Double A Investments INC Rowland, North Carolina	Standard	1998-07-08	Valid
N53713	Bellanca 7GCAA	Fixed-wing, single engine	Individual owner Georgia	Standard	1998-05-12	Valid
N8555Y	Piper PA-30	Fixed-wing, multi-engine	Co-owned owner California	Standard	1998-05-08	Valid
N7864Y	Piper PA-30	Fixed-wing, multi-engine	Co-owned owner Arizona	Standard	1998-04-14	Valid
N8597Y	Piper PA-30	Fixed-wing, multi-engine	Individual owner California	Standard	1998-03-18	Valid
N922KD	Schultz Kenneth L MA5 CHARGER	Fixed-wing, single engine	Individual owner Illinois	Experimental	1998-03-06	Valid
N8756Y	Piper PA-30	Fixed-wing, multi-engine	Agri Business Aviation INC Sparta, Illinois	Standard	1998-01-08	Valid
N444CP	Piper PA-30	Fixed-wing, multi-engine	Individual owner Tennessee	Standard	1997-12-19	Valid
N4L	Baumgartner PITTS S-1	Fixed-wing, single engine	Individual owner Maryland	Experimental	1997-10-10	Valid
N8087Y	Piper PA-30	Fixed-wing, multi-engine	Individual owner Oregon	Standard	1997-09-22	Valid
N7252Y	Piper PA-30	Fixed-wing, multi-engine	Individual owner Montana	Standard	1997-07-15	Valid
N966RP	Pernic Robert Joseph T-18CW	Fixed-wing, single engine	Individual owner Wisconsin	Experimental	1997-06-18	Valid
N80RV	Pennington Clark RV-3-80	Fixed-wing, single engine	Individual owner Washington	Experimental	1997-05-20	Valid
N894	Cessna 172I	Fixed-wing, single engine	Blanton Aircraft CO INC Orlando, Florida	Multiple	1997-04-02	Valid
N8837Y	Piper PA-30	Fixed-wing, multi-engine	Wilfly INC Dahlgren, Illinois	Standard	1997-03-25	Valid
N95KP	Bellanca 8KCAB	Fixed-wing, single engine	Individual owner Virginia	Standard	1997-03-12	Valid
N8626Y	Piper PA-30	Fixed-wing, multi-engine	Individual owner Minnesota	Standard	1997-02-19	Valid
N53754	Bellanca 7KCAB	Fixed-wing, single engine	B U International INC Pierce, Texas	Standard	1997-02-06	Valid
N7396Y	Piper PA-30	Fixed-wing, multi-engine	Individual owner Tennessee	Standard	1997-01-16	Valid
N8691Y	Piper PA-30	Fixed-wing, multi-engine	Individual owner Oregon	Standard	1996-12-02	Valid
N2574G	Champion 7KCAB	Fixed-wing, single engine	Co-owned owner Minnesota	Restricted	1996-11-18	Valid
N7631Y	Piper PA-30	Fixed-wing, multi-engine	Mbsp Enterprises INC Wilmington, Delaware	Standard	1996-11-08	Valid
N53900	Bellanca 8KCAB	Fixed-wing, single engine	Individual owner Michigan	Standard	1996-10-17	Valid
N7771Y	Piper PA-30	Fixed-wing, multi-engine	Dakota Executive Flight INC Miller, South Dakota	Standard	1996-10-03	Valid
N7542Y	Piper PA-30	Fixed-wing, multi-engine	Individual owner Pennsylvania	Standard	1996-09-23	Valid
N448RV	Mccarley James/Billy RV-4	Fixed-wing, single engine	Co-owned owner Texas	Experimental	1996-09-19	Valid
N9008L	Champion 7KCAB	Fixed-wing, single engine	P and C Flying Club LLC Williamsport, Pennsylvania	Standard	1996-08-30	Valid
N91XC	Piper PA-39	Fixed-wing, multi-engine	Individual owner Ohio	Standard	1996-07-31	Valid
N320BW	Winterberg Brian LANCAIR 320	Fixed-wing, single engine	Individual owner California	Experimental	1996-07-11	Valid
N69AU	Champion 7KCAB	Fixed-wing, single engine	Individual owner Connecticut	Multiple	1996-07-05	Valid
N5098X	Champion 7KCAB	Fixed-wing, single engine	Individual owner Louisiana	Standard	1996-07-03	Valid
N7523Y	Piper PA-30	Fixed-wing, multi-engine	Individual owner California	Standard	1996-06-15	Valid
N7388Y	Piper PA-30	Fixed-wing, multi-engine	Individual owner Tennessee	Standard	1996-06-11	Valid
N1883	Nielsen Jeff S RV6	Fixed-wing, single engine	Individual owner Oregon	Experimental	1996-01-29	Valid
N320HD	Darcangelo Harold LANCAIR 320	Fixed-wing, single engine	Individual owner Arizona	Experimental	1996-01-24	Valid
N403WR	Rumburg William LANCAIR 320	Fixed-wing, single engine	Individual owner North Carolina	Experimental	1995-12-15	Valid
N7WL	Piper PA-30	Fixed-wing, multi-engine	Individual owner Florida	Standard	1995-09-27	Valid
N7021Y	Piper PA-30	Fixed-wing, multi-engine	Individual owner Georgia	Standard	1995-08-24	Valid
N361AC	Bellanca 7KCAB	Fixed-wing, single engine	Individual owner Missouri	Standard	1995-07-31	Valid
N6316N	Champion 7KCAB	Fixed-wing, single engine	Individual owner Wisconsin	Standard	1995-07-18	Valid
N8618Y	Piper PA-30	Fixed-wing, multi-engine	Group Aire II Manitowoc, Wisconsin	Standard	1995-05-12	Valid
N87036	Bellanca 7KCAB	Fixed-wing, single engine	Individual owner New Mexico	Standard	1995-05-05	Valid
N886TH	Bellanca 8KCAB	Fixed-wing, single engine	Individual owner Texas	Standard	1995-03-30	Valid
N317RJ	Piper PA-30	Fixed-wing, multi-engine	N317Rj INC Maitland, Florida	Standard	1995-02-04	Valid
N44WD	Piper PA-30	Fixed-wing, multi-engine	Individual owner Michigan	Standard	1994-10-13	Valid
N8366Y	Piper PA-30	Fixed-wing, multi-engine	Individual owner Florida	Standard	1994-10-05	Valid
N1847G	Champion 7KCAB	Fixed-wing, single engine	Individual owner Texas	Standard	1994-07-06	Valid
N8343Y	Piper PA-30	Fixed-wing, multi-engine	Individual owner Illinois	Standard	1994-06-23	Valid
N294RV	Dyer T/Dyer J RV 6A	Fixed-wing, single engine	Individual owner Texas	Experimental	1994-03-29	Valid
N29EE	Eiland Eddie L THORP T-18	Fixed-wing, single engine	Individual owner Texas	Experimental	1994-03-07	Valid
N36138	Bellanca 7KCAB	Fixed-wing, single engine	Individual owner California	Standard	1994-03-01	Valid
N700KR	Piper PA-30	Fixed-wing, multi-engine	Individual owner Texas	Standard	1994-02-24	Valid
N12208	Bellanca 7KCAB	Fixed-wing, single engine	Co-owned owner Ohio	Standard	1994-01-10	Valid
N7024Y	Piper PA-30	Fixed-wing, multi-engine	Individual owner Nevada	Standard	1994-01-03	Valid
N2628G	Champion 7KCAB	Fixed-wing, single engine	Individual owner Texas	Standard	1993-12-20	Valid
N5231X	Champion 7KCAB	Fixed-wing, single engine	Individual owner California	Standard	1993-12-02	Valid
N8717Y	Piper PA-30	Fixed-wing, multi-engine	Parker Meyers and Roth INC Morgan Hill, California	Standard	1993-10-29	Valid
N69BC	Bingham B C SHA-GLASAIR	Fixed-wing, single engine	Individual owner California	Experimental	1993-10-12	Valid
N8633V	Bellanca 7KCAB	Fixed-wing, single engine	Co-owned owner California	Standard	1993-08-26	Valid
N3XE	Piper PA-30	Fixed-wing, multi-engine	Serv Aero Engineering INC Salinas, California	Standard	1993-08-25	Valid
N7898Y	Piper PA-30	Fixed-wing, multi-engine	Patry Aeronautical Institute Kalispell, Montana	Standard	1993-08-05	Valid
N235NY	Cessna 172P	Fixed-wing, single engine	Civil Air Patrol INC Maxwell Afb, Alabama	Standard	1993-06-10	Valid
N95452	Piper PA-28-140	Fixed-wing, single engine	Individual owner Illinois	Standard	1993-05-05	Valid
N5221X	Champion 7KCAB	Fixed-wing, single engine	Co-owned owner Virginia	Standard	1993-04-29	Valid
N3557Y	Piper PA-30	Fixed-wing, multi-engine	Individual owner Nevada	Standard	1993-02-24	Valid
N8566Y	Piper PA-30	Fixed-wing, multi-engine	Co-owned owner Arizona	Multiple	1993-02-10	Valid
N7020Y	Piper PA-30	Fixed-wing, multi-engine	Individual owner Missouri	Standard	1993-02-09	Valid
N222H	Hitchcock Duane B LANCAIR 320	Fixed-wing, single engine	Individual owner Colorado	Experimental	1993-02-01	Valid
N301EM	Piper PA-30	Fixed-wing, multi-engine	Individual owner Kansas	Standard	1993-01-27	Valid
N7389Y	Piper PA-30	Fixed-wing, multi-engine	Pascoe Aviation INC Gulf Breeze, Florida	Standard	1992-11-23	Valid
N7840Y	Piper PA-30	Fixed-wing, multi-engine	Individual owner New York	Standard	1992-11-02	Valid
N53RM	Modert Ray H 235	Fixed-wing, single engine	Individual owner Texas	Experimental	1992-10-28	Valid
N8371Y	Piper PA-30	Fixed-wing, multi-engine	Astro Star Aviation INC Niles, Michigan	Standard	1992-10-19	Valid

Source: FAA Civil Aviation Registry, Releasable Aircraft Database (the engine reference table and each aircraft's engine code), October 7, 2026. Horsepower and thrust are the FAA's figures for the series, not for a particular aircraft.