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

0208415622830193019401950196019701980199020002010192020

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 Textron Lycoming Avco Corporation). 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

0245700051423125

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 Textron Lycoming Avco Corporation · 27 models listed · revised April 4, 1977

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
Where they are
Biggest operators
Airworthiness

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 modelGroupOwner and baseCertificateRegisteredStatus
N6YP Piper
PA-30
Fixed-wing, multi-engine Aircraft Guaranty CORP Trustee
Oklahoma City, Oklahoma
Standard 2023-05-10 ValidFAA registration status code V: Valid registration. All codes
N7286Y Piper
PA-30
Fixed-wing, multi-engine Reagan Scott Lllp
Mount Pleasant, South Carolina
Standard 2023-05-09 ValidFAA registration status code V: Valid registration. All codes
N98NT Piper
PA-30
Fixed-wing, multi-engine Individual owner
Nevada
Standard 2023-05-08 ValidFAA registration status code V: Valid registration. All codes
N57454 Bellanca
8KCAB
Fixed-wing, single engine Ck Leasing Services LLC
Wilmington, Delaware
Standard 2023-05-06 ValidFAA registration status code V: Valid registration. All codes
N7430Y Piper
PA-30
Fixed-wing, multi-engine Lavion LLC DBA
Zeeland, Michigan
Standard 2023-05-06 ValidFAA registration status code V: Valid registration. All codes
N537DM Piper
PA-30
Fixed-wing, multi-engine Co-owned owner
New York
Standard 2023-05-05 ValidFAA registration status code V: Valid registration. All codes
N8327Y Piper
PA-30
Fixed-wing, multi-engine Co-owned owner
Indiana
Standard 2023-05-01 ValidFAA registration status code V: Valid registration. All codes
N55RD Piper
PA-30
Fixed-wing, multi-engine Individual owner
Maryland
Standard 2023-04-30 ValidFAA registration status code V: Valid registration. All codes
N68573 Bellanca
7KCAB
Fixed-wing, single engine Individual owner
Missouri
Standard 2023-04-28 ValidFAA registration status code V: Valid registration. All codes
N8635Y Piper
PA-30
Fixed-wing, multi-engine Individual owner
Connecticut
Standard 2023-04-25 ValidFAA registration status code V: Valid registration. All codes
N911RK Piper
PA-30
Fixed-wing, multi-engine Individual owner
Nevada
Standard 2023-04-24 ValidFAA registration status code V: Valid registration. All codes
N967EY Piper
PA-30
Fixed-wing, multi-engine Joy Ventures LLC
Helena, Montana
Standard 2023-04-17 ValidFAA registration status code V: Valid registration. All codes
N90975 Bellanca
8KCAB
Fixed-wing, single engine Co-owned owner
Pennsylvania
Standard 2023-04-16 ValidFAA registration status code V: Valid registration. All codes
N1147 Piper
PA-30
Fixed-wing, multi-engine N7371Y LLC
Waterford, Michigan
Standard 2023-04-15 ValidFAA registration status code V: Valid registration. All codes
N501RE Piper
PA-30
Fixed-wing, multi-engine Independence Aerospace LLC
Kennesaw, Georgia
Standard 2023-04-12 ValidFAA registration status code V: Valid registration. All codes
N36628 Bellanca
8KCAB
Fixed-wing, single engine Individual owner
Wisconsin
Standard 2023-04-05 ValidFAA registration status code V: Valid registration. All codes
N8197Y Piper
PA-30
Fixed-wing, multi-engine Co-owned owner
Georgia
Standard 2023-04-05 ValidFAA registration status code V: Valid registration. All codes
N7567F Champion
7KCAB
Fixed-wing, single engine Mansfield Heliflight INC
Milton, Vermont
Standard 2023-04-03 ValidFAA registration status code V: Valid registration. All codes
N31256 Bellanca
7KCAB
Fixed-wing, single engine Individual owner
North Carolina
Standard 2023-03-31 ValidFAA registration status code V: Valid registration. All codes
N7546F Champion
7KCAB
Fixed-wing, single engine Co-owned owner
Alabama
Standard 2023-03-31 ValidFAA registration status code V: Valid registration. All codes
N777KB Brynestad
STARDUSTER TOO
Fixed-wing, single engine Individual owner
South Carolina
Experimental 2023-03-22 ValidFAA registration status code V: Valid registration. All codes
N7930Y Piper
PA-30
Fixed-wing, multi-engine Short Final LLC
Mooresville, North Carolina
Standard 2023-03-22 ValidFAA registration status code V: Valid registration. All codes
N88184 Bellanca
7KCAB
Fixed-wing, single engine Co-owned owner
Maryland
Standard 2023-03-22 ValidFAA registration status code V: Valid registration. All codes
N23LN Bellanca
7KCAB
Fixed-wing, single engine Jw Air LLC
Suffolk, Virginia
Standard 2023-03-21 ValidFAA registration status code V: Valid registration. All codes
N34HC Caine H P/Lett R
LANCAIR 320
Fixed-wing, single engine Summit Concepts INC
Wilmington, Delaware
Experimental 2023-03-20 ValidFAA registration status code V: Valid registration. All codes
N8699 Bellanca
7KCAB
Fixed-wing, single engine Co-owned owner
Texas
Standard 2023-03-20 ValidFAA registration status code V: Valid registration. All codes
N7225Y Piper
PA-30
Fixed-wing, multi-engine Twin Cam Holdings LLC
Union City, Tennessee
Standard 2023-03-15 ValidFAA registration status code V: Valid registration. All codes
N7734Y Piper
PA-30
Fixed-wing, multi-engine Co-owned owner
Georgia
Standard 2023-03-13 ValidFAA registration status code V: Valid registration. All codes
N8405Y Piper
PA-30
Fixed-wing, multi-engine Co-owned owner
Texas
Standard 2023-03-11 ValidFAA registration status code V: Valid registration. All codes
N8754Y Piper
PA-30
Fixed-wing, multi-engine Amelia Air 863 LLC
Lakeland, Florida
Standard 2023-03-11 ValidFAA registration status code V: Valid registration. All codes
N781DM Marshall B Alexander
RV-9A
Fixed-wing, single engine Individual owner
Oklahoma
Experimental 2023-03-03 ValidFAA registration status code V: Valid registration. All codes
N8341Y Piper
PA-30
Fixed-wing, multi-engine Individual owner
Georgia
Standard 2023-03-02 ValidFAA registration status code V: Valid registration. All codes
N8965Y Piper
PA-39
Fixed-wing, multi-engine Lucid Thought Consulting LLC
Terre Haute, Indiana
Standard 2023-03-02 ValidFAA registration status code V: Valid registration. All codes
N2269H Merrill Timothy D
COZY MARK IV
Fixed-wing, single engine Aerotranscendent INC
Champaign, Illinois
Experimental 2023-03-01 ValidFAA registration status code V: Valid registration. All codes
N7240Y Piper
PA-30
Fixed-wing, multi-engine Individual owner
Georgia
Standard 2023-02-25 ValidFAA registration status code V: Valid registration. All codes
N53844 Bellanca
7KCAB
Fixed-wing, single engine Individual owner
California
Standard 2023-02-23 ValidFAA registration status code V: Valid registration. All codes
N8207Y Piper
PA-30
Fixed-wing, multi-engine Twinkie Air LLC
Colville, Washington
Standard 2023-02-21 ValidFAA registration status code V: Valid registration. All codes
N86651 Bellanca
7KCAB
Fixed-wing, single engine Individual owner
Wisconsin
Standard 2023-02-21 ValidFAA registration status code V: Valid registration. All codes
N8817Y Piper
PA-30
Fixed-wing, multi-engine Individual owner
Virginia
Standard 2023-02-18 ValidFAA registration status code V: Valid registration. All codes
N555NS Piper
PA-30
Fixed-wing, multi-engine N8241R LLC
Leawood, Kansas
Standard 2023-02-17 ValidFAA registration status code V: Valid registration. All codes
N646FB Bush Frank J
VANS RV-9A
Fixed-wing, single engine Individual owner
California
Experimental 2023-02-15 ValidFAA registration status code V: Valid registration. All codes
N7885Y Piper
PA-30
Fixed-wing, multi-engine Individual owner
Iowa
Standard 2023-02-12 ValidFAA registration status code V: Valid registration. All codes
N27YP Williams Bruce E
SH-2 GLASAIR
Fixed-wing, single engine Individual owner
Colorado
Experimental 2023-02-11 ValidFAA registration status code V: Valid registration. All codes
N8419Y Piper
PA-30
Fixed-wing, multi-engine Individual owner
Rhode Island
Standard 2023-02-10 ValidFAA registration status code V: Valid registration. All codes
N7611Y Piper
PA-30
Fixed-wing, multi-engine Individual owner
Nevada
Standard 2023-02-08 ValidFAA registration status code V: Valid registration. All codes
N28G Bellanca
7KCAB
Fixed-wing, single engine Individual owner
California
Standard 2023-02-05 ValidFAA registration status code V: Valid registration. All codes
N7915Y Piper
PA-30
Fixed-wing, multi-engine Turbine Financial Group LLC
Ogden, Utah
Standard 2023-02-02 ValidFAA registration status code V: Valid registration. All codes
N92JK Kelley John W
LANCAIR 320
Fixed-wing, single engine B Burgess CO
Wilmington, Delaware
Experimental 2023-02-02 ValidFAA registration status code V: Valid registration. All codes
N99TL Link John H
RV-4
Fixed-wing, single engine Individual owner
Michigan
Experimental 2023-02-01 ValidFAA registration status code V: Valid registration. All codes
N7962Y Piper
PA-30
Fixed-wing, multi-engine Individual owner
Iowa
Restricted 2023-01-31 ValidFAA registration status code V: Valid registration. All codes
N7159Y Piper
PA-30
Fixed-wing, multi-engine Individual owner
Florida
Standard 2023-01-30 ValidFAA registration status code V: Valid registration. All codes
N9KR Resnick Kenneth R
RESNICK GLASAIR SH2F
Fixed-wing, single engine Individual owner
Georgia
Experimental 2023-01-27 ValidFAA registration status code V: Valid registration. All codes
N71PV Piper
PA-30
Fixed-wing, multi-engine Celeste LLC
Playa del Rey, California
Standard 2023-01-26 ValidFAA registration status code V: Valid registration. All codes
N1605G Champion
7KCAB
Fixed-wing, single engine Co-owned owner
California
Standard 2023-01-25 ValidFAA registration status code V: Valid registration. All codes
N7583Y Piper
PA-30
Fixed-wing, multi-engine Individual owner
New York
Standard 2023-01-25 ValidFAA registration status code V: Valid registration. All codes
N92BH Piper
PA-30
Fixed-wing, multi-engine Co-owned owner
California
Standard 2023-01-25 ValidFAA registration status code V: Valid registration. All codes
N870WT Bellanca
8KCAB
Fixed-wing, single engine Individual owner
Louisiana
Standard 2023-01-24 ValidFAA registration status code V: Valid registration. All codes
N952WA Bellanca
7KCAB
Fixed-wing, single engine Co-owned owner
Connecticut
Standard 2023-01-24 ValidFAA registration status code V: Valid registration. All codes
N7758Y Piper
PA-30
Fixed-wing, multi-engine Mead Aviation LLC
Missoula, Montana
Standard 2023-01-23 ValidFAA registration status code V: Valid registration. All codes
N555RM Siemsen Randall R
RV 3/A1
Fixed-wing, single engine Individual owner
Montana
Experimental 2023-01-22 ValidFAA registration status code V: Valid registration. All codes
N57635 Bellanca
8KCAB
Fixed-wing, single engine Individual owner
Washington
Standard 2023-01-18 ValidFAA registration status code V: Valid registration. All codes
N9069L Champion
7KCAB
Fixed-wing, single engine Citabria Flyers LLC
North Salt Lake, Utah
Standard 2023-01-16 ValidFAA registration status code V: Valid registration. All codes
N8806 Bellanca
7KCAB
Fixed-wing, single engine Individual owner
Kentucky
Standard 2023-01-14 ValidFAA registration status code V: Valid registration. All codes
N7264Y Piper
PA-30
Fixed-wing, multi-engine Yogi Air LLC
Wadsworth, Ohio
Standard 2023-01-13 ValidFAA registration status code V: Valid registration. All codes
N99AR Piper
PA-30
Fixed-wing, multi-engine Tiffin Aire INC
Tiffin, Ohio
Standard 2023-01-12 ValidFAA registration status code V: Valid registration. All codes
N7695Y Piper
PA-30
Fixed-wing, multi-engine Individual owner
Texas
Standard 2023-01-11 ValidFAA registration status code V: Valid registration. All codes
N7820Y Piper
PA-30
Fixed-wing, multi-engine Coma Pipe LLC
Wilmington, Delaware
Standard 2023-01-11 ValidFAA registration status code V: Valid registration. All codes
N86579 Bellanca
7KCAB
Fixed-wing, single engine Co-owned owner
New York
Standard 2022-12-29 ValidFAA registration status code V: Valid registration. All codes
N41BP Piper
PA-30
Fixed-wing, multi-engine Co-owned owner
Montana
Standard 2022-12-28 ValidFAA registration status code V: Valid registration. All codes
N86641 Bellanca
7KCAB
Fixed-wing, single engine Aa Stearman LLC
Lewisville, Texas
Standard 2022-12-23 ValidFAA registration status code V: Valid registration. All codes
N7533Y Piper
PA-30
Fixed-wing, multi-engine Flying Pirates Unlimited LLC
New Bern, North Carolina
Standard 2022-12-19 ValidFAA registration status code V: Valid registration. All codes
N82GH Harr Glen
STEEN SKYBOLT
Fixed-wing, single engine Individual owner
Florida
Experimental 2022-12-14 ValidFAA registration status code V: Valid registration. All codes
N8316Y Piper
PA-30
Fixed-wing, multi-engine Individual owner
Georgia
Standard 2022-12-07 ValidFAA registration status code V: Valid registration. All codes
N8839Y Piper
PA-39
Fixed-wing, multi-engine Co-owned owner
Texas
Standard 2022-12-05 ValidFAA registration status code V: Valid registration. All codes
N31273 Bellanca
8KCAB
Fixed-wing, single engine Individual owner
North Dakota
Standard 2022-12-03 ValidFAA registration status code V: Valid registration. All codes
N8648Y Piper
PA-30
Fixed-wing, multi-engine Individual owner
Michigan
Standard 2022-11-30 ValidFAA registration status code V: Valid registration. All codes
N64MC Mcelhoe Bruce A
MCELHOE EASY
Fixed-wing, single engine Co-owned owner
California
Experimental 2022-11-28 ValidFAA registration status code V: Valid registration. All codes
N7281Y Piper
PA-30
Fixed-wing, multi-engine Go for Flight LLC
Minneapolis, Minnesota
Standard 2022-11-26 ValidFAA registration status code V: Valid registration. All codes
N359DW Piper
PA-30
Fixed-wing, multi-engine Individual owner
Standard 2022-11-07 ValidFAA registration status code V: Valid registration. All codes
N69RD Piper
PA-30
Fixed-wing, multi-engine Individual owner
Virginia
Standard 2022-11-04 ValidFAA registration status code V: Valid registration. All codes
N8336Y Piper
PA-30
Fixed-wing, multi-engine Individual owner
Ohio
Standard 2022-11-04 ValidFAA registration status code V: Valid registration. All codes
N7866Y Piper
PA-30
Fixed-wing, multi-engine Henrie Aviation LLC
Fairfield, New Jersey
Standard 2022-11-02 ValidFAA registration status code V: Valid registration. All codes
N7998Y Piper
PA-30
Fixed-wing, multi-engine Airjohn LLC
Cheyenne, Wyoming
Standard 2022-11-01 ValidFAA registration status code V: Valid registration. All codes
N444HS Schable
THORP T-18
Fixed-wing, single engine Individual owner
Nevada
Experimental 2022-10-27 ValidFAA registration status code V: Valid registration. All codes
N7404Y Piper
PA-30
Fixed-wing, multi-engine Slowpoke Air LLC
Palm Harbor, Florida
Standard 2022-10-27 ValidFAA registration status code V: Valid registration. All codes
N8678Y Piper
PA-30
Fixed-wing, multi-engine Individual owner
Arizona
Standard 2022-10-25 ValidFAA registration status code V: Valid registration. All codes
N8201Y Piper
PA-30
Fixed-wing, multi-engine Torqmation INC
Houston, Texas
Multiple 2022-10-20 ValidFAA registration status code V: Valid registration. All codes
N401AD Bellanca
8KCAB
Fixed-wing, single engine Individual owner
Texas
Standard 2022-10-18 ValidFAA registration status code V: Valid registration. All codes
N7811S Bellanca
7KCAB
Fixed-wing, single engine Crop Air LLC
Eaton, Colorado
Standard 2022-10-17 ValidFAA registration status code V: Valid registration. All codes
N8110Y Piper
PA-30
Fixed-wing, multi-engine M2 Recreation LLC
Wilmington, North Carolina
Standard 2022-10-14 ValidFAA registration status code V: Valid registration. All codes
N8598Y Piper
PA-30
Fixed-wing, multi-engine Gulf Coast Aviation LLC
New Orleans, Louisiana
Standard 2022-10-13 ValidFAA registration status code V: Valid registration. All codes
N326MG Hardinger David A
STOL 1
Fixed-wing, single engine Individual owner
Pennsylvania
Experimental 2022-10-07 ValidFAA registration status code V: Valid registration. All codes
N37RW Raymond-Everett
STARDUSTER SA300
Fixed-wing, single engine Citabria Aces LLC
Virginia Beach, Virginia
Experimental 2022-09-30 ValidFAA registration status code V: Valid registration. All codes
N5101X Champion
7KCAB
Fixed-wing, single engine Individual owner
Arizona
Standard 2022-09-22 ValidFAA registration status code V: Valid registration. All codes
N5EB Piper
PA-30
Fixed-wing, multi-engine N5Eb LLC
Medina, Ohio
Standard 2022-09-20 ValidFAA registration status code V: Valid registration. All codes
N88149 Bellanca
8KCAB
Fixed-wing, single engine Co-owned owner
Texas
Standard 2022-09-15 ValidFAA registration status code V: Valid registration. All codes
N3322G Piper
PA-39
Fixed-wing, multi-engine Lone Star Flight Museum
Houston, Texas
Standard 2022-09-13 ValidFAA registration status code V: Valid registration. All codes
N5185T Champion
7KCAB
Fixed-wing, single engine Individual owner
Oregon
Standard 2022-09-07 ValidFAA registration status code V: Valid registration. All codes
N8712Y Piper
PA-30
Fixed-wing, multi-engine Co-owned owner
Florida
Standard 2022-09-07 ValidFAA registration status code V: Valid registration. All codes
N7485Y Piper
PA-30
Fixed-wing, multi-engine Cline Aircraft LLC
Mena, Arkansas
Standard 2022-08-29 ValidFAA registration status code V: Valid registration. All codes
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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.