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
N19VS	Piper PA-30	Fixed-wing, multi-engine	Individual owner Texas	Standard	2014-02-25	Valid
N7378Y	Piper PA-30	Fixed-wing, multi-engine	Co-owned owner Oklahoma	Standard	2014-02-18	Valid
N7621S	Bellanca 8KCAB	Fixed-wing, single engine	Individual owner Virginia	Standard	2014-02-12	Valid
N8687V	Bellanca 8KCAB	Fixed-wing, single engine	Collum Aviation LLC Milton, Florida	Standard	2014-02-12	Valid
N168JM	Bellanca 7KCAB	Fixed-wing, single engine	Individual owner Missouri	Standard	2014-02-10	Valid
N393TC	Carnett Thomas F THORP T-18	Fixed-wing, single engine	Individual owner Colorado	Experimental	2014-02-04	Valid
N8791Y	Piper PA-30	Fixed-wing, multi-engine	Individual owner Florida	Standard	2014-02-03	Valid
N904JB	Bellanca 8KCAB	Fixed-wing, single engine	Individual owner Mississippi	Standard	2014-01-21	Valid
N8808Y	Piper PA-30	Fixed-wing, multi-engine	Co-owned owner Iowa	Standard	2014-01-16	Valid
N5771H	Bruce T Hill RV-9A	Fixed-wing, single engine	Individual owner California	Experimental	2014-01-08	Valid
N4948	Piper PA-18-150	Fixed-wing, single engine	Individual owner Alaska	Standard	2013-12-23	Valid
N746MB	Bellanca 7KCAB	Fixed-wing, single engine	Co-owned owner Ohio	Standard	2013-11-26	Valid
N8947Y	Piper PA-39	Fixed-wing, multi-engine	Co-owned owner Oklahoma	Standard	2013-11-21	Valid
N7468Y	Piper PA-30	Fixed-wing, multi-engine	Individual owner California	Standard	2013-08-21	Valid
N7958Y	Piper PA-30	Fixed-wing, multi-engine	Co-owned owner Maryland	Standard	2013-08-06	Valid
N8693Y	Piper PA-30	Fixed-wing, multi-engine	Peregrine Aviation LLC Winfield, Illinois	Standard	2013-08-06	Valid
N98651	Cessna 172P	Fixed-wing, single engine	Milton Aviation INC Mohegan Lake, New York	Standard	2013-08-01	Valid
N222RK	Bellanca 7KCAB	Fixed-wing, single engine	Individual owner Texas	Standard	2013-07-31	Valid
N320HM	Mattern Hubert D LANCAIR 320	Fixed-wing, single engine	Individual owner California	Experimental	2013-07-31	Valid
N27J	Oliver John FALCO F8L	Fixed-wing, single engine	Co-owned owner West Virginia	Experimental	2013-07-23	Valid
N7120Y	Piper PA-30	Fixed-wing, multi-engine	Individual owner Nebraska	Standard	2013-07-17	Valid
N19PC	Sawka Craig GLASSAIR RG1	Fixed-wing, single engine	Individual owner New Mexico	Experimental	2013-05-16	Valid
N92EX	Krueger Scott LANCAIR 320	Fixed-wing, single engine	Partners Aviation LLC Wilmington, Delaware	Experimental	2013-04-23	Valid
N36337	Bellanca 8KCAB	Fixed-wing, single engine	Individual owner Arkansas	Standard	2013-04-19	Valid
N882KM	Mitch Matheny GLASTAR	Fixed-wing, single engine	Individual owner Florida	Experimental	2013-04-03	Valid
N8557V	Bellanca 7KCAB	Fixed-wing, single engine	Individual owner Oklahoma	Standard	2013-03-25	Valid
N8074Y	Piper PA-30	Fixed-wing, multi-engine	Whistle Air LLC Seymour, Indiana	Standard	2013-03-11	Valid
N57433	Bellanca 8KCAB	Fixed-wing, single engine	Propwash LLC Princeville, Illinois	Standard	2013-03-08	Valid
N4CK	Piper PA-30	Fixed-wing, multi-engine	Lorenzo Walker Institute of Technology Naples, Florida	Standard	2013-02-13	Valid
N8234Y	Piper PA-30	Fixed-wing, multi-engine	Individual owner Florida	Standard	2013-02-07	Valid
N34WC	Walling R A VANS RV-3A	Fixed-wing, single engine	Vanguard Squadron INC Tea, South Dakota	Experimental	2013-01-28	Valid
N6317N	Champion 7KCAB	Fixed-wing, single engine	Individual owner Georgia	Standard	2013-01-17	Valid
N811LE	Piper PA-30	Fixed-wing, multi-engine	Individual owner California	Standard	2013-01-17	Valid
N8692Y	Piper PA-30	Fixed-wing, multi-engine	Tedder AG Technologies INC Walsh, Colorado	Standard	2013-01-14	Valid
N808BB	Piper PA-30	Fixed-wing, multi-engine	Plane Fun Aviation LLC Wilmington, Delaware	Standard	2013-01-11	Valid
N53970	Bellanca 7KCAB	Fixed-wing, single engine	Individual owner Oklahoma	Standard	2013-01-10	Valid
N7806Y	Piper PA-30	Fixed-wing, multi-engine	Hhozapnv-Llc Las Vegas, Nevada	Standard	2013-01-10	Valid
N7791Y	Piper PA-30	Fixed-wing, multi-engine	Individual owner Florida	Standard	2013-01-04	Valid
N23MG	Piper PA-39	Fixed-wing, multi-engine	Individual owner Colorado	Standard	2012-12-21	Valid
N7433K	Piper PA-20	Fixed-wing, single engine	Individual owner Michigan	Standard	2012-12-19	Valid
N65710	Cessna 172P	Fixed-wing, single engine	Beach Cities Aviation Academy LLC Hawthorne, California	Standard	2012-12-17	Valid
N8709V	Bellanca 7KCAB	Fixed-wing, single engine	Individual owner Arizona	Standard	2012-12-04	Valid
N8956Y	Piper PA-39	Fixed-wing, multi-engine	Dark Side Aeronautical INC Wilmington, Delaware	Standard	2012-11-28	Valid
N8814Y	Piper PA-30	Fixed-wing, multi-engine	Twin C 14Y LLC Cape Coral, Florida	Standard	2012-11-27	Valid
N7978Y	Piper PA-30	Fixed-wing, multi-engine	Co-owned owner Arkansas	Standard	2012-11-06	Valid
N6300N	Champion 7KCAB	Fixed-wing, single engine	Individual owner Nevada	Standard	2012-10-30	Valid
N36413	Bellanca 8KCAB	Fixed-wing, single engine	Individual owner Colorado	Standard	2012-10-26	Valid
N88288	Bellanca 8KCAB	Fixed-wing, single engine	Individual owner California	Standard	2012-10-10	Valid
N90991	Bellanca 7KCAB	Fixed-wing, single engine	Individual owner Nebraska	Standard	2012-09-25	Valid
N8379Y	Piper PA-30	Fixed-wing, multi-engine	Individual owner Illinois	Standard	2012-09-17	Valid
N717TA	Piper PA-30	Fixed-wing, multi-engine	Twin C Aviation INC Chapel Hill, North Carolina	Standard	2012-08-22	Valid
N6074V	Temco GC-1B	Fixed-wing, single engine	Individual owner Oklahoma	Experimental	2012-08-17	Valid
N513JS	Shipler John Daniel FALCO F8L	Fixed-wing, single engine	Individual owner Kansas	Experimental	2012-08-16	Valid
N7563F	Champion 7KCAB	Fixed-wing, single engine	Individual owner Georgia	Standard	2012-08-09	Valid
N8708Y	Piper PA-30	Fixed-wing, multi-engine	Basso Family Ventures LLC La Mesa, California	Standard	2012-08-01	Valid
N767KP	Piper PA-30	Fixed-wing, multi-engine	Phill-Air INC Dover, Delaware	Standard	2012-07-31	Valid
N90976	Bellanca 7KCAB	Fixed-wing, single engine	Individual owner Pennsylvania	Standard	2012-07-27	Valid
N7327Y	Piper PA-30	Fixed-wing, multi-engine	Individual owner Ohio	Standard	2012-07-26	Valid
N11702	Bellanca 7KCAB	Fixed-wing, single engine	Tailwheeling It LLC Algoma, Wisconsin	Standard	2012-07-25	Valid
N88268	Bellanca 8KCAB	Fixed-wing, single engine	Co-owned owner Kansas	Standard	2012-07-25	Valid
N8528	Bellanca 8KCAB	Fixed-wing, single engine	Individual owner North Carolina	Standard	2012-07-17	Valid
N53978	Bellanca 7KCAB	Fixed-wing, single engine	Individual owner Alaska	Standard	2012-07-16	Valid
N25PR	Piper PA-30	Fixed-wing, multi-engine	International Air Services INC Trustee Carson City, Nevada	Standard	2012-07-03	Valid
N8133Y	Piper PA-30	Fixed-wing, multi-engine	Individual owner Minnesota	Standard	2012-06-27	Valid
N7044Y	Piper PA-30	Fixed-wing, multi-engine	Individual owner Texas	Standard	2012-06-25	Valid
N26868	Piper J3C-65	Fixed-wing, single engine	Co-owned owner Missouri	Experimental	2012-06-22	Valid
N5069X	Champion 7KCAB	Fixed-wing, single engine	Individual owner Texas	Standard	2012-06-22	Valid
N33JF	Piper PA-30	Fixed-wing, multi-engine	Individual owner Georgia	Standard	2012-06-18	Valid
N120CP	Porter Charles J RV-8	Fixed-wing, single engine	Individual owner Washington	Experimental	2012-06-08	Valid
N8696V	Bellanca 7KCAB	Fixed-wing, single engine	Individual owner Georgia	Standard	2012-05-24	Valid
N8748V	Bellanca 7KCAB	Fixed-wing, single engine	Individual owner Michigan	Standard	2012-05-11	Valid
N25GW	White Gerald R RV-6A	Fixed-wing, single engine	Individual owner Georgia	Experimental	2012-05-09	Valid
N320DE	Ehrke Donald J LANCAIR 320	Fixed-wing, single engine	Mustang Aeronautics INC Chandler, Arizona	Experimental	2012-05-04	Valid
N8527Y	Piper PA-30	Fixed-wing, multi-engine	Hatbright Farm LLC Wilmington, Delaware	Standard	2012-04-26	Valid
N622B	Piper PA-30	Fixed-wing, multi-engine	Ridley Aircraft & Aviation Services LLC Gilbert, Arizona	Standard	2012-04-14	Valid
N93BD	Piper PA-30	Fixed-wing, multi-engine	Co-owned owner Arkansas	Standard	2012-04-14	Valid
N506GL	Great Lakes 2T-1A-1	Fixed-wing, single engine	Co-owned owner New York	Standard	2012-04-10	Valid
N7601Y	Piper PA-30	Fixed-wing, multi-engine	Individual owner Michigan	Standard	2012-04-04	Valid
N320AJ	Jeske Alan H LANCAIR 320	Fixed-wing, single engine	Daedalus Wings INC Malvern, Ohio	Experimental	2012-03-29	Valid
N7532F	Champion 7KCAB	Fixed-wing, single engine	Individual owner California	Standard	2012-03-28	Valid
N7149D	Aaron Charles PA-18 REPLICA	Fixed-wing, single engine	Co-owned owner Alabama	Experimental	2012-03-08	Valid
N5183T	Champion 7KCAB	Fixed-wing, single engine	Minier Tryg Corralitos, California	Standard	2012-02-28	Valid
N53876	Bellanca 8KCAB	Fixed-wing, single engine	Individual owner Iowa	Standard	2012-01-27	Valid
N900DC	Piper PA-39	Fixed-wing, multi-engine	Co-owned owner Minnesota	Standard	2012-01-11	Valid
N8512Y	Piper PA-30	Fixed-wing, multi-engine	Individual owner Texas	Standard	2011-12-22	Valid
N8037Y	Piper PA-30	Fixed-wing, multi-engine	Individual owner Indiana	Standard	2011-12-20	Valid
N7200Y	Piper PA-30	Fixed-wing, multi-engine	Individual owner Arkansas	Standard	2011-12-14	Valid
N8259Y	Piper PA-30	Fixed-wing, multi-engine	Ryan Ferguson LLC Sanford, Florida	Standard	2011-12-07	Valid
N169GS	Gary L Scott LONG EZ	Fixed-wing, single engine	Individual owner California	Experimental	2011-10-19	Valid
N285EJ	Mitchell K Counce VANS RV-9A	Fixed-wing, single engine	Individual owner Arizona	Experimental	2011-10-13	Valid
N72KC	Bellanca 7KCAB	Fixed-wing, single engine	Individual owner Alabama	Standard	2011-10-05	Valid
N143MM	Piper PA-39	Fixed-wing, multi-engine	Individual owner Florida	Standard	2011-08-16	Valid
N36382	Bellanca 7KCAB	Fixed-wing, single engine	Co-owned owner California	Standard	2011-07-28	Valid
N86637	Bellanca 8KCAB	Fixed-wing, single engine	Individual owner Iowa	Standard	2011-07-25	Valid
N8695Y	Piper PA-30	Fixed-wing, multi-engine	Purkinje LTD LLC Wilmington, Delaware	Standard	2011-07-23	Valid
N292RE	Piper PA-30	Fixed-wing, multi-engine	Structure INC Neenah, Wisconsin	Standard	2011-06-28	Valid
N11659	Bellanca 7KCAB	Fixed-wing, single engine	Villa Holdings LLC Commerce, California	Standard	2011-06-18	Valid
N723JS	Piper PA-30	Fixed-wing, multi-engine	Individual owner Florida	Standard	2011-06-08	Valid
N4ZV	Mcginty Edwin R RV-4	Fixed-wing, single engine	Individual owner Washington	Experimental	2011-05-31	Valid
N7047Y	Piper PA-30	Fixed-wing, multi-engine	Individual owner Delaware	Standard	2011-05-03	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.