The U.S. aircraft register, updated daily
Engines · piston (reciprocating) · data as of October 7, 2026

Lycoming O-320 series

27,315 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 (9,462 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 Skyhawk9,462Piper 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

Texas2,350California2,123Florida2,076Alaska1,796Washington1,004Ohio731Georgia718Minnesota686North Carolina674Arizona659

Kind of aircraft

Piston singles26,597 (97%)Piston twins414 (2%)Helicopters303 (1%)Gliders1 (0.0%)

When the aircraft were built by decade

02,8515,7028,55411,405193019401950196019701980199020002010552020

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 · 27,315

Tail no.Maker and modelGroupOwner and baseCertificateRegisteredStatus
N6966C Piper
PA-28-161
Fixed-wing, single engine Individual owner
Alabama
Standard 2025-08-22 ValidFAA registration status code V: Valid registration. All codes
N9128L Champion
7GCAA
Fixed-wing, single engine Co-owned owner
California
Multiple 2025-08-22 ValidFAA registration status code V: Valid registration. All codes
N9720K Piper
PA-28-151
Fixed-wing, single engine Individual owner
California
Standard 2025-08-22 ValidFAA registration status code V: Valid registration. All codes
N1838P Piper
PA-22-150
Fixed-wing, single engine Individual owner
Oregon
Standard 2025-08-21 ValidFAA registration status code V: Valid registration. All codes
N3667P Piper
PA-18A 150
Fixed-wing, single engine Slofly LLC
Red Lodge, Montana
Standard 2025-08-21 ValidFAA registration status code V: Valid registration. All codes
N416JL Piper
PA-28-140
Fixed-wing, single engine Individual owner
Texas
Standard 2025-08-21 ValidFAA registration status code V: Valid registration. All codes
N4490J Piper
PA-28-140
Fixed-wing, single engine Individual owner
Texas
Standard 2025-08-21 ValidFAA registration status code V: Valid registration. All codes
N5025Q Bellanca
7GCBC
Fixed-wing, single engine Individual owner
South Dakota
Standard 2025-08-21 ValidFAA registration status code V: Valid registration. All codes
N5116V Morrisey-Shinn
2150-A
Fixed-wing, single engine Individual owner
Florida
Standard 2025-08-21 ValidFAA registration status code V: Valid registration. All codes
N75701 Cessna
172N
Fixed-wing, single engine Roseville Aviation LLC
Roxboro, North Carolina
Standard 2025-08-21 ValidFAA registration status code V: Valid registration. All codes
N82918 Piper
PA-18-150
Fixed-wing, single engine Individual owner
Alaska
Multiple 2025-08-21 ValidFAA registration status code V: Valid registration. All codes
N9206N Piper
PA-28-161
Fixed-wing, single engine Skylink Xpress INC
San Bernardino, California
Standard 2025-08-21 ValidFAA registration status code V: Valid registration. All codes
N981MA Cessna
172N
Fixed-wing, single engine Red Rose Flight Tours LLC
Lancaster, Pennsylvania
Standard 2025-08-21 ValidFAA registration status code V: Valid registration. All codes
N9887V Cessna
172M
Fixed-wing, single engine Individual owner
Texas
Standard 2025-08-21 ValidFAA registration status code V: Valid registration. All codes
N9999U Grumman American Avn. Corp.
AA-5A
Fixed-wing, single engine Individual owner
North Carolina
Standard 2025-08-21 ValidFAA registration status code V: Valid registration. All codes
N12860 Cessna
172M
Fixed-wing, single engine Solis Aviation LLC
Carroll, Ohio
Standard 2025-08-20 ValidFAA registration status code V: Valid registration. All codes
N15800 Piper
PA-28-140
Fixed-wing, single engine Somd Aircraft Rentals and Instruction LLC
Leonardtown, Maryland
Standard 2025-08-20 ValidFAA registration status code V: Valid registration. All codes
N15819 Piper
PA-28-140
Fixed-wing, single engine Individual owner
Utah
Standard 2025-08-20 ValidFAA registration status code V: Valid registration. All codes
N18EB Cessna
172M
Fixed-wing, single engine Eagle Air US INC
Eau Claire, Wisconsin
Standard 2025-08-20 ValidFAA registration status code V: Valid registration. All codes
N2846T Piper
PA-28-140
Fixed-wing, single engine Edjs Holdings LLC
Gladewater, Texas
Standard 2025-08-20 ValidFAA registration status code V: Valid registration. All codes
N4442A Piper
PA-22-150
Fixed-wing, single engine Vella la Cava Air LLC
Albuquerque, New Mexico
Standard 2025-08-20 ValidFAA registration status code V: Valid registration. All codes
N50615 Bellanca
7GCBC
Fixed-wing, single engine Stinger Tailwheel LLC
Miami, Florida
Standard 2025-08-20 ValidFAA registration status code V: Valid registration. All codes
N5825L American
AA-5
Fixed-wing, single engine Individual owner
Missouri
Standard 2025-08-20 ValidFAA registration status code V: Valid registration. All codes
N78695 Cessna
172K
Fixed-wing, single engine Mac Electric LLC
White House, Tennessee
Standard 2025-08-20 ValidFAA registration status code V: Valid registration. All codes
N870MC Callen Melvin K
RV-4
Fixed-wing, single engine Individual owner
New Mexico
Experimental 2025-08-20 ValidFAA registration status code V: Valid registration. All codes
N975S American Champion Aircraft
7GCBC
Fixed-wing, single engine Individual owner
California
Standard 2025-08-20 ValidFAA registration status code V: Valid registration. All codes
N98424 Cessna
172P
Fixed-wing, single engine Individual owner
Minnesota
Standard 2025-08-20 ValidFAA registration status code V: Valid registration. All codes
N98714 Cessna
172P
Fixed-wing, single engine Yellow Jacket Flying Club INC
Chamblee, Georgia
Standard 2025-08-20 ValidFAA registration status code V: Valid registration. All codes
N9946W Piper
PA-28-140
Fixed-wing, single engine Hangar 0205 INC
Calhoun, Georgia
Standard 2025-08-20 ValidFAA registration status code V: Valid registration. All codes
N15675 Piper
PA-28-140
Fixed-wing, single engine Airfleet Solutions LLC
Newark, Delaware
Standard 2025-08-19 ValidFAA registration status code V: Valid registration. All codes
N3094Z Piper
PA-18-150
Fixed-wing, single engine Co-owned owner
Nevada
Standard 2025-08-19 ValidFAA registration status code V: Valid registration. All codes
N3301Z Piper
PA-22-150
Fixed-wing, single engine Individual owner
Oklahoma
Standard 2025-08-19 ValidFAA registration status code V: Valid registration. All codes
N36ZQ Cessna
172M
Fixed-wing, single engine Northern Flights LLC
Calumet, Michigan
Standard 2025-08-19 ValidFAA registration status code V: Valid registration. All codes
N41369 Piper
PA-28-151
Fixed-wing, single engine Ascent Aviation INC
Van Nuys, California
Standard 2025-08-19 ValidFAA registration status code V: Valid registration. All codes
N4555A Piper
PA-22-150
Fixed-wing, single engine Lifetime Adventures LLC
Bellevue, Michigan
Standard 2025-08-19 ValidFAA registration status code V: Valid registration. All codes
N51467 Piper
PA-28-161
Fixed-wing, single engine Ascent Aviation INC
Van Nuys, California
Standard 2025-08-19 ValidFAA registration status code V: Valid registration. All codes
N5771D Piper
PA-18-150
Fixed-wing, single engine Individual owner
Alaska
Restricted 2025-08-19 ValidFAA registration status code V: Valid registration. All codes
N5847W Piper
PA-28-160
Fixed-wing, single engine Reed Charles W
Elizabeth City, North Carolina
Standard 2025-08-19 ValidFAA registration status code V: Valid registration. All codes
N73267 Cessna
172M
Fixed-wing, single engine Co-owned owner
California
Standard 2025-08-19 ValidFAA registration status code V: Valid registration. All codes
N733TK Cessna
172N
Fixed-wing, single engine Cardiff Aviation INC
Cardiff By the Sea, California
Standard 2025-08-19 ValidFAA registration status code V: Valid registration. All codes
N737BC Cessna
172N
Fixed-wing, single engine N737Bc LLC
Dover, Delaware
Standard 2025-08-19 ValidFAA registration status code V: Valid registration. All codes
N75274 Piper
PA-28-151
Fixed-wing, single engine Ascent Aviation INC
Van Nuys, California
Standard 2025-08-19 ValidFAA registration status code V: Valid registration. All codes
N9699V Cessna
172M
Fixed-wing, single engine Co-owned owner
Florida
Standard 2025-08-19 ValidFAA registration status code V: Valid registration. All codes
N135KA Piper
PA-18-150
Fixed-wing, single engine Individual owner
Alaska
Standard 2025-08-18 ValidFAA registration status code V: Valid registration. All codes
N3643X Aero Commander
100
Fixed-wing, single engine Individual owner
Wisconsin
Standard 2025-08-18 ValidFAA registration status code V: Valid registration. All codes
N39MR Pitts Special
S-1C
Fixed-wing, single engine Individual owner
Illinois
Experimental 2025-08-18 ValidFAA registration status code V: Valid registration. All codes
N4234J Piper
PA-28-140
Fixed-wing, single engine Homerun Horizons LLC
Weatherford, Texas
Standard 2025-08-18 ValidFAA registration status code V: Valid registration. All codes
N57422 Presson Joseph O
RV-6
Fixed-wing, single engine Individual owner
Pennsylvania
Experimental 2025-08-18 ValidFAA registration status code V: Valid registration. All codes
N7174B Piper
PA-18-150
Fixed-wing, single engine Individual owner
North Dakota
Multiple 2025-08-18 ValidFAA registration status code V: Valid registration. All codes
N718TE Bellanca
7GCAA
Fixed-wing, single engine Individual owner
Illinois
Standard 2025-08-18 ValidFAA registration status code V: Valid registration. All codes
N73925 Cessna
172N
Fixed-wing, single engine Wings Over Texas Holdings LLC
Denton, Texas
Standard 2025-08-18 ValidFAA registration status code V: Valid registration. All codes
N9226C Piper
PA-28-161
Fixed-wing, single engine Lane Community College
Eugene, Oregon
Standard 2025-08-18 ValidFAA registration status code V: Valid registration. All codes
N35348 Cessna
172I
Fixed-wing, single engine Jet & Rotor Aviation LLC
Sacramento, California
Standard 2025-08-17 ValidFAA registration status code V: Valid registration. All codes
N35696 Cessna
172I
Fixed-wing, single engine Individual owner
Oklahoma
Standard 2025-08-17 ValidFAA registration status code V: Valid registration. All codes
N5077W Piper
PA-28-160
Fixed-wing, single engine Skyport Aviation LLC
Birmingham, Iowa
Standard 2025-08-17 ValidFAA registration status code V: Valid registration. All codes
N63CV Bellanca
7GCAA
Fixed-wing, single engine Individual owner
Oklahoma
Standard 2025-08-17 ValidFAA registration status code V: Valid registration. All codes
N64268 Cessna
172M
Fixed-wing, single engine Co-owned owner
Florida
Standard 2025-08-17 ValidFAA registration status code V: Valid registration. All codes
N7140J Cessna
172N
Fixed-wing, single engine Cohesive Aviation LLC
Gilford, New Hampshire
Standard 2025-08-17 ValidFAA registration status code V: Valid registration. All codes
N7984G Cessna
172L
Fixed-wing, single engine Champion Air LLC
Louisville, Kentucky
Standard 2025-08-17 ValidFAA registration status code V: Valid registration. All codes
N83476 Piper
PA-18-150
Fixed-wing, single engine Individual owner
Texas
Standard 2025-08-17 ValidFAA registration status code V: Valid registration. All codes
N1012A Piper
PA-18-135
Fixed-wing, single engine Co-owned owner
North Carolina
Standard 2025-08-16 ValidFAA registration status code V: Valid registration. All codes
N22763 Piper
PA-28-140
Fixed-wing, single engine Co-owned owner
Kansas
Standard 2025-08-16 ValidFAA registration status code V: Valid registration. All codes
N2551Z Bellanca
7GCBC
Fixed-wing, single engine Individual owner
Alaska
Standard 2025-08-16 ValidFAA registration status code V: Valid registration. All codes
N320MW Smith George R
LANCAIR 320
Fixed-wing, single engine Triple Nickel Aviation LLC
Fort Lauderdale, Florida
Experimental 2025-08-16 ValidFAA registration status code V: Valid registration. All codes
N4967N Criswell William H
CAVALIER 102.5
Fixed-wing, single engine Individual owner
North Carolina
Experimental 2025-08-16 ValidFAA registration status code V: Valid registration. All codes
N5298W Piper
PA-28-160
Fixed-wing, single engine Aim High Aviation LLC
Coral Springs, Florida
Standard 2025-08-16 ValidFAA registration status code V: Valid registration. All codes
N63128 Wecker Richard C
WECKER ACRO TRAINER
Fixed-wing, single engine Co-owned owner
California
Experimental 2025-08-16 ValidFAA registration status code V: Valid registration. All codes
N738AK Cessna
172N
Fixed-wing, single engine Airresource LLC
Kalispell, Montana
Standard 2025-08-16 ValidFAA registration status code V: Valid registration. All codes
N817KC Sewall
PITTS SPECIAL S-1E
Fixed-wing, single engine Individual owner
Georgia
Experimental 2025-08-16 ValidFAA registration status code V: Valid registration. All codes
N82236 Piper
PA-18-150
Fixed-wing, single engine Individual owner
Wyoming
Restricted 2025-08-16 ValidFAA registration status code V: Valid registration. All codes
N8467R Piper
PA-28-140
Fixed-wing, single engine Co-owned owner
Tennessee
Standard 2025-08-16 ValidFAA registration status code V: Valid registration. All codes
N84877 Cessna
172K
Fixed-wing, single engine N84877 LLC
Fernandina Beach, Florida
Standard 2025-08-16 ValidFAA registration status code V: Valid registration. All codes
N9746W Piper
PA-28-140
Fixed-wing, single engine Withheld at owner's request
Standard 2025-08-16 ValidFAA registration status code V: Valid registration. All codes
N13231 Cessna
172M
Fixed-wing, single engine Ace Aviation LLC
Sapulpa, Oklahoma
Standard 2025-08-15 ValidFAA registration status code V: Valid registration. All codes
N224JA Cessna
172P
Fixed-wing, single engine Wingsleasing LLC
Wichita, Kansas
Standard 2025-08-15 ValidFAA registration status code V: Valid registration. All codes
N2312L Beech
23
Fixed-wing, single engine Individual owner
South Carolina
Standard 2025-08-15 ValidFAA registration status code V: Valid registration. All codes
N28QW Piper
PA-28-140
Fixed-wing, single engine Individual owner
District of Columbia
Standard 2025-08-15 ValidFAA registration status code V: Valid registration. All codes
N5805U Piper
PA-28-140
Fixed-wing, single engine Foxtrot Three Flying Services LLC
Henderson, Nevada
Standard 2025-08-15 ValidFAA registration status code V: Valid registration. All codes
N6002W Piper
PA-28-140
Fixed-wing, single engine Individual owner
Indiana
Standard 2025-08-15 ValidFAA registration status code V: Valid registration. All codes
N61670 Cessna
172M
Fixed-wing, single engine Withheld at owner's request
Standard 2025-08-15 ValidFAA registration status code V: Valid registration. All codes
N73250 Cessna
172M
Fixed-wing, single engine Skaya Aircraft LLC
Buford, Georgia
Standard 2025-08-15 ValidFAA registration status code V: Valid registration. All codes
N78647 Cessna
172K
Fixed-wing, single engine Twj Aviation 1 LLC
Jacksonville, Florida
Standard 2025-08-15 ValidFAA registration status code V: Valid registration. All codes
N8911D Piper
PA-22-160
Fixed-wing, single engine Individual owner
Alaska
Standard 2025-08-15 ValidFAA registration status code V: Valid registration. All codes
N3804P Piper
PA-22-150
Fixed-wing, single engine Individual owner
Wyoming
Standard 2025-08-14 ValidFAA registration status code V: Valid registration. All codes
N43326 Piper
PA-28-151
Fixed-wing, single engine Draco Flight School DBA
Chino, California
Standard 2025-08-14 ValidFAA registration status code V: Valid registration. All codes
N4635R Piper
PA-28-140
Fixed-wing, single engine Individual owner
Tennessee
Standard 2025-08-14 ValidFAA registration status code V: Valid registration. All codes
N5407W Piper
PA-28-150
Fixed-wing, single engine Third Step 6 LLC
Gilbert, Arizona
Standard 2025-08-14 ValidFAA registration status code V: Valid registration. All codes
N7227Q Cessna
172L
Fixed-wing, single engine Elite Air LLC
Tullahoma, Tennessee
Standard 2025-08-14 ValidFAA registration status code V: Valid registration. All codes
N1328E Cessna
172N
Fixed-wing, single engine Sj28E LLC
Durango, Colorado
Standard 2025-08-13 ValidFAA registration status code V: Valid registration. All codes
N20115 Cessna
172M
Fixed-wing, single engine Alpha Zulu Aviation LLC
San Diego, California
Standard 2025-08-13 ValidFAA registration status code V: Valid registration. All codes
N20246 Cessna
172M
Fixed-wing, single engine Individual owner
Wisconsin
Standard 2025-08-13 ValidFAA registration status code V: Valid registration. All codes
N2581F Champion
7GCAA
Fixed-wing, single engine Co-owned owner
New Jersey
Standard 2025-08-13 ValidFAA registration status code V: Valid registration. All codes
N51EH Grumman American Avn. Corp.
GA-7
Fixed-wing, multi-engine Individual owner
Pennsylvania
Standard 2025-08-13 ValidFAA registration status code V: Valid registration. All codes
N75110 Piper
PA-28-151
Fixed-wing, single engine Triple R Aviation LLC
Cleburne, Texas
Standard 2025-08-13 ValidFAA registration status code V: Valid registration. All codes
N8732V Bellanca
7GCBC
Fixed-wing, single engine Individual owner
Oregon
Standard 2025-08-13 ValidFAA registration status code V: Valid registration. All codes
N2210X Piper
PA-28-161
Fixed-wing, single engine Draco Flight School DBA
Chino, California
Standard 2025-08-12 ValidFAA registration status code V: Valid registration. All codes
N3484T Cessna
177
Fixed-wing, single engine Cairo Jane LLC
Ponca City, Oklahoma
Standard 2025-08-12 ValidFAA registration status code V: Valid registration. All codes
N40984 Piper
PA-28-140
Fixed-wing, single engine Four Zero Niner LLC
Granger, Iowa
Standard 2025-08-12 ValidFAA registration status code V: Valid registration. All codes
N515MS Piper
PA-28-161
Fixed-wing, single engine Draco Flight School DBA
Chino, California
Standard 2025-08-12 ValidFAA registration status code V: Valid registration. All codes
N82547 Piper
PA-18-150
Fixed-wing, single engine Jeffries Aviation LLC
Kalispell, Montana
Standard 2025-08-12 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 7, 2026. Horsepower and thrust are the FAA's figures for the series, not for a particular aircraft.