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

Lycoming O-320 series

27,316 aircraft on the U.S. register carry a Lycoming O-320 series engine, rated at about 180 horsepower. The Cessna 172 Skyhawk is the model most often fitted with it (9,463 aircraft). The aircraft carrying it were built between 1949 and 2026.

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-320 series (2 codes). FAA spellings: 0-320 SERIES · O-320 SERIES.

Fitted to model families

Cessna 172 Skyhawk9,463Piper PA-28 Cherokee, Warrior, Archer and Arrow6,844Piper PA-18 Super Cub2,393Piper PA-22 Tri-Pacer and Colt1,660Grumman American Avn. Corp. AA-5 Traveler, Cheetah and Tiger566Bellanca 7 Citabria563Cessna 177 Cardinal398Piper PA-23 Apache and Aztec347Robinson R22276Champion 7 Citabria and Champ266American Champion Aircraft 7 Citabria and Champ249Piper PA-12 Super Cruiser149

Cessna 172 Skyhawk · Piper PA-28 Cherokee, Warrior, Archer and Arrow · Piper PA-18 Super Cub · Piper PA-22 Tri-Pacer and Colt · Grumman American Avn. Corp. AA-5 Traveler, Cheetah and Tiger · Bellanca 7 Citabria · Cessna 177 Cardinal · Piper PA-23 Apache and Aztec · Robinson R22 · Champion 7 Citabria and Champ

Where they are owner's state

Texas2,349California2,123Florida2,075Alaska1,796Washington1,004Ohio731Georgia718Minnesota686North Carolina674Arizona659

Kind of aircraft

Piston singles26,598 (97%)Piston twins414 (2%)Helicopters303 (1%)Gliders1 (0.0%)

When the aircraft were built by decade

02,8525,7038,55411,406193019401950196019701980199020002010552020

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

The design is held under 1 type certificate (E-274, held by Lycoming Engines). The FAA has issued 29 airworthiness directives (orders that owners must comply with) that name this engine series. Operators and repair shops have filed 349 failure reports with the FAA since 1995, 19 of them in the last ten years.

FAA orders 29 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
2012-03-272012-03-07 · Carburetor · engine
2008-10-202008-19-05 · Parallel Valve'' reciprocating engines · engine
2006-01-312005-26-10 · ECi cylinder assemblies. · engine

All orders naming the Lycoming O-320 series

Failure reports 349 since · what operators and shops told the FAA

010203141950106111621426

Parts most often reported as the reports name them

Spar18Tube17Cylinder15Bulkhead9Alternator8Control Cable8Bolt7Carburetor7Fitting6Float6

Latest reports

2026-09-03Gascolator: dirty
2026-05-19Impulse Coupling: unserviceable
2026-03-10Cylinder Head: cracked
2026-03-05Cylinder: cracked
2025-11-24Cylinder: cracked

Certificates and bulletins

E-274Type certificate held by Lycoming Engines · 60 models listed · revised April 30, 2013

Safety bulletins 17 · advice, not orders

2022-09-26NE-06-31R6 · Engine Lubricating Oils
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,...

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-o-320-series.json · about the eFlight graph.

Aircraft newest certificates first · 27,316

Tail no.Maker and modelGroupOwner and baseCertificateRegisteredStatus
N8747M Beech
23
Fixed-wing, single engine Co-owned owner
Washington
Standard 2026-05-01 ValidFAA registration status code V: Valid registration. All codes
N15CH Piper
PA-28-151
Fixed-wing, single engine Orlando Flight Academy INC
Apopka, Florida
Standard 2026-04-30 ValidFAA registration status code V: Valid registration. All codes
N4864G Cessna
172N
Fixed-wing, single engine Lazy Eights Holdings LLC
Greenwood, Indiana
Standard 2026-04-30 ValidFAA registration status code V: Valid registration. All codes
N5125W Piper
PA-28-160
Fixed-wing, single engine Elyon Holdings LLC
Gulf Shores, Alabama
Standard 2026-04-30 ValidFAA registration status code V: Valid registration. All codes
N544CA Piper
PA-28-151
Fixed-wing, single engine Jet Air INC
Iowa City, Iowa
Standard 2026-04-30 ValidFAA registration status code V: Valid registration. All codes
N55242 Cessna
172P
Fixed-wing, single engine Hills Holding
Newark, Delaware
Standard 2026-04-30 ValidFAA registration status code V: Valid registration. All codes
N9656D Piper
PA-22-160
Fixed-wing, single engine Individual owner
Nebraska
Standard 2026-04-30 ValidFAA registration status code V: Valid registration. All codes
N2354E Cessna
172N
Fixed-wing, single engine Garuda Flight Training LLC
Miami, Florida
Standard 2026-04-29 ValidFAA registration status code V: Valid registration. All codes
N2894Q Cessna
172L
Fixed-wing, single engine Individual owner
Idaho
Standard 2026-04-29 ValidFAA registration status code V: Valid registration. All codes
N5198E Cessna
172N
Fixed-wing, single engine Garuda Flight Training LLC
Miami, Florida
Standard 2026-04-29 ValidFAA registration status code V: Valid registration. All codes
N6176G Cessna
172N
Fixed-wing, single engine Garuda Flight Training LLC
Miami, Florida
Standard 2026-04-29 ValidFAA registration status code V: Valid registration. All codes
N6971J Piper
PA-28-140
Fixed-wing, single engine Individual owner
California
Standard 2026-04-29 ValidFAA registration status code V: Valid registration. All codes
N733WM Cessna
172N
Fixed-wing, single engine Individual owner
California
Standard 2026-04-29 ValidFAA registration status code V: Valid registration. All codes
N811W Petty Bradley H
MUSTANG-II
Fixed-wing, single engine Individual owner
South Carolina
Experimental 2026-04-29 ValidFAA registration status code V: Valid registration. All codes
N8857M Beech
A23
Fixed-wing, single engine Individual owner
Texas
Standard 2026-04-29 ValidFAA registration status code V: Valid registration. All codes
N40776 Piper
PA-28-140
Fixed-wing, single engine Third Coast Aircraft LLC
Mobile, Alabama
Standard 2026-04-28 ValidFAA registration status code V: Valid registration. All codes
N4815F Piper
PA-28-151
Fixed-wing, single engine Air 2 Sea LLC
Martin, Tennessee
Standard 2026-04-28 ValidFAA registration status code V: Valid registration. All codes
N1563J Piper
PA-28-140
Fixed-wing, single engine Co-owned owner
Iowa
Standard 2026-04-27 ValidFAA registration status code V: Valid registration. All codes
N193CP Piper
PA-18-150
Fixed-wing, single engine Stillwater Aviation LLC
Winter Haven, Florida
Standard 2026-04-27 ValidFAA registration status code V: Valid registration. All codes
N35713 Cessna
172I
Fixed-wing, single engine 35713 LLC
Kitty Hawk, North Carolina
Standard 2026-04-27 ValidFAA registration status code V: Valid registration. All codes
N382MA American Champion Aircraft
7GCAA
Fixed-wing, single engine Fly To Sea LLC
Stanford, California
Standard 2026-04-27 ValidFAA registration status code V: Valid registration. All codes
N41657 Piper
PA-28-151
Fixed-wing, single engine Individual owner
Texas
Standard 2026-04-27 ValidFAA registration status code V: Valid registration. All codes
N6883J Piper
PA-28-151
Fixed-wing, single engine Robbins John L
Crossville, Tennessee
Standard 2026-04-27 ValidFAA registration status code V: Valid registration. All codes
N734XK Cessna
172N
Fixed-wing, single engine Individual owner
North Dakota
Standard 2026-04-27 ValidFAA registration status code V: Valid registration. All codes
N8372L Cessna
172I
Fixed-wing, single engine Red Sky Aviation LLC
Livermore, California
Standard 2026-04-27 ValidFAA registration status code V: Valid registration. All codes
N33595 Piper
PA-28-140
Fixed-wing, single engine N33595 Cherokee LLC
Austin, Texas
Standard 2026-04-26 ValidFAA registration status code V: Valid registration. All codes
N80487 Cessna
172M
Fixed-wing, single engine Individual owner
Alabama
Standard 2026-04-26 ValidFAA registration status code V: Valid registration. All codes
N84567 Cessna
172K
Fixed-wing, single engine Individual owner
Washington
Standard 2026-04-26 ValidFAA registration status code V: Valid registration. All codes
N86838 Bellanca
7GCBC
Fixed-wing, single engine Individual owner
Alaska
Standard 2026-04-26 ValidFAA registration status code V: Valid registration. All codes
N90984 Bellanca
7GCBC
Fixed-wing, single engine Individual owner
Arkansas
Multiple 2026-04-25 ValidFAA registration status code V: Valid registration. All codes
N2365Q Beech
23
Fixed-wing, single engine Individual owner
New Jersey
Standard 2026-04-24 ValidFAA registration status code V: Valid registration. All codes
N276T Piper
PA-18
Fixed-wing, single engine Individual owner
New York
Standard 2026-04-24 ValidFAA registration status code V: Valid registration. All codes
N35Z Zauner Otto
RV-4
Fixed-wing, single engine Individual owner
New Jersey
Experimental 2026-04-24 ValidFAA registration status code V: Valid registration. All codes
N4399A Piper
PA-18-150
Fixed-wing, single engine Individual owner
New York
Standard 2026-04-24 ValidFAA registration status code V: Valid registration. All codes
N500BE Robinson Helicopter
R22 BETA
Helicopter Individual owner
Wisconsin
Standard 2026-04-24 ValidFAA registration status code V: Valid registration. All codes
N5857V Piper
PA-28-161
Fixed-wing, single engine Individual owner
Virginia
Standard 2026-04-24 ValidFAA registration status code V: Valid registration. All codes
N7008R Piper
PA-28-140
Fixed-wing, single engine Individual owner
Florida
Standard 2026-04-24 ValidFAA registration status code V: Valid registration. All codes
N733MZ Cessna
172N
Fixed-wing, single engine Individual owner
Oklahoma
Standard 2026-04-24 ValidFAA registration status code V: Valid registration. All codes
N97MS Schlarb Michael
SCHLARB PITTS S1S
Fixed-wing, single engine Individual owner
Kansas
Experimental 2026-04-24 ValidFAA registration status code V: Valid registration. All codes
N991BJ Piper
PA-28-161
Fixed-wing, single engine Silver Express CO
Miami, Florida
Standard 2026-04-24 ValidFAA registration status code V: Valid registration. All codes
N1720T Piper
PA-28-140
Fixed-wing, single engine Lumi Wings CORP
Goodyear, Arizona
Standard 2026-04-23 ValidFAA registration status code V: Valid registration. All codes
N20065 Cessna
172M
Fixed-wing, single engine Southern Aero LLC
Homestead, Florida
Standard 2026-04-23 ValidFAA registration status code V: Valid registration. All codes
N23EL Robinson Helicopter
R22 BETA
Helicopter Individual owner
Tennessee
Standard 2026-04-23 ValidFAA registration status code V: Valid registration. All codes
N2823Z Piper
PA-22-150
Fixed-wing, single engine Individual owner
Michigan
Standard 2026-04-23 ValidFAA registration status code V: Valid registration. All codes
N3327T Cessna
177
Fixed-wing, single engine Individual owner
California
Standard 2026-04-23 ValidFAA registration status code V: Valid registration. All codes
N4410E Piper
PA-18-150
Fixed-wing, single engine Individual owner
Alaska
Restricted 2026-04-23 ValidFAA registration status code V: Valid registration. All codes
N6157W Piper
PA-28-140
Fixed-wing, single engine Laminar Skies Aviation LLC
Broken Arrow, Oklahoma
Standard 2026-04-23 ValidFAA registration status code V: Valid registration. All codes
N9117Q Hladky Richard L
HLADKY RV-4
Fixed-wing, single engine Individual owner
California
Experimental 2026-04-23 ValidFAA registration status code V: Valid registration. All codes
N15037 Piper
PA-28-140
Fixed-wing, single engine Ace Aircraft Leasing INC
Nazareth, Pennsylvania
Standard 2026-04-22 ValidFAA registration status code V: Valid registration. All codes
N1897T Piper
PA-28-140
Fixed-wing, single engine Mortgage Experts LLC
Homestead, Florida
Standard 2026-04-22 ValidFAA registration status code V: Valid registration. All codes
N21743 Cessna
172M
Fixed-wing, single engine Co-owned owner
South Dakota
Standard 2026-04-22 ValidFAA registration status code V: Valid registration. All codes
N55264 Cessna
172P
Fixed-wing, single engine Ace Aircraft Leasing INC
Nazareth, Pennsylvania
Standard 2026-04-22 ValidFAA registration status code V: Valid registration. All codes
N586FL Piper
PA-28-140
Fixed-wing, single engine Ace Aircraft Leasing INC
Nazareth, Pennsylvania
Standard 2026-04-22 ValidFAA registration status code V: Valid registration. All codes
N7157D Piper
PA-22-150
Fixed-wing, single engine Individual owner
Maryland
Standard 2026-04-22 ValidFAA registration status code V: Valid registration. All codes
N8543E Piper
PA-28-140
Fixed-wing, single engine Ace Aircraft Leasing INC
Nazareth, Pennsylvania
Standard 2026-04-22 ValidFAA registration status code V: Valid registration. All codes
N6363W Piper
PA-28-140
Fixed-wing, single engine Kvidera N6363W LLC
Webster, Wisconsin
Standard 2026-04-21 ValidFAA registration status code V: Valid registration. All codes
N7031B Piper
PA-22-150
Fixed-wing, single engine Mason Crosby H
Zebulon, North Carolina
Standard 2026-04-21 ValidFAA registration status code V: Valid registration. All codes
N8386L Cessna
172I
Fixed-wing, single engine Individual owner
Michigan
Standard 2026-04-21 ValidFAA registration status code V: Valid registration. All codes
N8449E Cessna
172N
Fixed-wing, single engine Jprg Aviation INC
Orlando, Florida
Standard 2026-04-21 ValidFAA registration status code V: Valid registration. All codes
N2085V Piper
PA-28-181
Fixed-wing, single engine Forbes Aviation LLC
Boise, Idaho
Standard 2026-04-20 ValidFAA registration status code V: Valid registration. All codes
N3404T Cessna
177
Fixed-wing, single engine Individual owner
Missouri
Standard 2026-04-20 ValidFAA registration status code V: Valid registration. All codes
N4692Q Cessna
172M
Fixed-wing, single engine Zulu Aircraft Leasing LLC
Grants Pass, Oregon
Standard 2026-04-20 ValidFAA registration status code V: Valid registration. All codes
N5958W Piper
PA-28-160
Fixed-wing, single engine Wise Aviation Solutions LLC
Rio Vista, Texas
Standard 2026-04-20 ValidFAA registration status code V: Valid registration. All codes
N64266 Cessna
172M
Fixed-wing, single engine Individual owner
Washington
Standard 2026-04-20 ValidFAA registration status code V: Valid registration. All codes
N733GS Cessna
172N
Fixed-wing, single engine Wings Over Texas Holdings LLC
Denton, Texas
Standard 2026-04-20 ValidFAA registration status code V: Valid registration. All codes
N7977V Piper
PA-18-150
Fixed-wing, single engine Individual owner
Minnesota
Standard 2026-04-20 ValidFAA registration status code V: Valid registration. All codes
N8189S Piper
PA-28-161
Fixed-wing, single engine Airplanes Unlimited LLC
Jackson, Tennessee
Standard 2026-04-20 ValidFAA registration status code V: Valid registration. All codes
N9552H Cessna
172M
Fixed-wing, single engine Zulu Aircraft Leasing LLC
Grants Pass, Oregon
Standard 2026-04-20 ValidFAA registration status code V: Valid registration. All codes
N9702D Piper
PA-22-160
Fixed-wing, single engine Individual owner
New Mexico
Standard 2026-04-20 ValidFAA registration status code V: Valid registration. All codes
N989DA Phillips Gerald
SUPER SPORT 18
Fixed-wing, single engine Individual owner
Alaska
Experimental 2026-04-20 ValidFAA registration status code V: Valid registration. All codes
N610JH Hammons John M
VANS RV-4
Fixed-wing, single engine Individual owner
Texas
Experimental 2026-04-19 ValidFAA registration status code V: Valid registration. All codes
N1093X Piper
PA-28-151
Fixed-wing, single engine Roseville Aviation LLC
Roxboro, North Carolina
Standard 2026-04-18 ValidFAA registration status code V: Valid registration. All codes
N11JP Payne Jack
PITTS SPECIAL S-1S
Fixed-wing, single engine Co-owned owner
Oklahoma
Experimental 2026-04-18 ValidFAA registration status code V: Valid registration. All codes
N564FL Piper
PA-28-140
Fixed-wing, single engine Flyguys Cessna 182 LLC
Royal Palm Beach, Florida
Standard 2026-04-18 ValidFAA registration status code V: Valid registration. All codes
N733HK Cessna
172N
Fixed-wing, single engine Van Anda Aviation LLC
Apopka, Florida
Standard 2026-04-18 ValidFAA registration status code V: Valid registration. All codes
N789BM Mcauliffe William J
GLASTAR
Fixed-wing, single engine Individual owner
Texas
Experimental 2026-04-18 ValidFAA registration status code V: Valid registration. All codes
N9286 Ard
BD-4F
Fixed-wing, single engine Individual owner
Indiana
Experimental 2026-04-17 ValidFAA registration status code V: Valid registration. All codes
N115BY American Champion Aircraft
7GCAA
Fixed-wing, single engine Individual owner
South Carolina
Standard 2026-04-16 ValidFAA registration status code V: Valid registration. All codes
N3967K Piper
PA-28-140
Fixed-wing, single engine Lakes Area Aero LLC
Pelican Rapids, Minnesota
Standard 2026-04-16 ValidFAA registration status code V: Valid registration. All codes
N5641V Piper
PA-28-161
Fixed-wing, single engine Flight Leasing CORP
Wilmington, Delaware
Standard 2026-04-16 ValidFAA registration status code V: Valid registration. All codes
N7018R Piper
PA-28-140
Fixed-wing, single engine Co-owned owner
Colorado
Standard 2026-04-16 ValidFAA registration status code V: Valid registration. All codes
N46550 Cessna
172K
Fixed-wing, single engine Individual owner
Texas
Standard 2026-04-15 ValidFAA registration status code V: Valid registration. All codes
N75712 Cessna
172N
Fixed-wing, single engine Individual owner
Florida
Standard 2026-04-15 ValidFAA registration status code V: Valid registration. All codes
N2847Q Cessna
172L
Fixed-wing, single engine Individual owner
Ohio
Multiple 2026-04-14 ValidFAA registration status code V: Valid registration. All codes
N3511K Piper
PA-28-140
Fixed-wing, single engine Co-owned owner
North Carolina
Standard 2026-04-14 ValidFAA registration status code V: Valid registration. All codes
N192AC American Champion Aircraft
7GCBC
Fixed-wing, single engine Individual owner
Texas
Standard 2026-04-13 ValidFAA registration status code V: Valid registration. All codes
N4155J Piper
PA-28-140
Fixed-wing, single engine Individual owner
California
Standard 2026-04-13 ValidFAA registration status code V: Valid registration. All codes
N5570F Piper
PA-28-140
Fixed-wing, single engine Cherokee Adventure CORP
Wilmington, Delaware
Standard 2026-04-13 ValidFAA registration status code V: Valid registration. All codes
N6098N Beech
19A
Fixed-wing, single engine Withheld at owner's request
Standard 2026-04-13 ValidFAA registration status code V: Valid registration. All codes
N64328 Cessna
172M
Fixed-wing, single engine Compass Aviation INC
Shelby, North Carolina
Standard 2026-04-13 ValidFAA registration status code V: Valid registration. All codes
N886EC Piper
PA-28-161
Fixed-wing, single engine Up and Up Aviation LLC
Magnolia, Texas
Standard 2026-04-13 ValidFAA registration status code V: Valid registration. All codes
N7342J Piper
PA-28-140
Fixed-wing, single engine Individual owner
Oklahoma
Standard 2026-04-12 ValidFAA registration status code V: Valid registration. All codes
N100M Cessna
172M
Fixed-wing, single engine Sky Odyssey Aviation LLC
Gulf Breeze, Florida
Standard 2026-04-11 ValidFAA registration status code V: Valid registration. All codes
N1732V Cessna
172M
Fixed-wing, single engine Elk & Ram Aviation Group LLC
San Antonio, Texas
Standard 2026-04-11 ValidFAA registration status code V: Valid registration. All codes
N4456R Cessna
172M
Fixed-wing, single engine Individual owner
Pennsylvania
Standard 2026-04-11 ValidFAA registration status code V: Valid registration. All codes
N4750A Piper
PA-22-150
Fixed-wing, single engine 22Av Group LLC
Austin, Texas
Standard 2026-04-11 ValidFAA registration status code V: Valid registration. All codes
N5068X Champion
7KCAB
Fixed-wing, single engine Individual owner
Florida
Standard 2026-04-11 ValidFAA registration status code V: Valid registration. All codes
N82743 Piper
PA-28-161
Fixed-wing, single engine Up and Away Aviation LLC
Poughkeepsie, New York
Standard 2026-04-11 ValidFAA registration status code V: Valid registration. All codes
N9421E Cessna
172N
Fixed-wing, single engine Individual owner
Virginia
Standard 2026-04-11 ValidFAA registration status code V: Valid registration. All codes
N9764W Piper
PA-28-140
Fixed-wing, single engine Individual owner
Colorado
Standard 2026-04-11 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.