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
N296TW Winstead Tom H
RV-4
Fixed-wing, single engine N296Tw LLC
Murrieta, California
Experimental 2025-10-08 ValidFAA registration status code V: Valid registration. All codes
N30TS Shanks Theodore E
VANS RV-4
Fixed-wing, single engine Av8Rs LLC
Gig Harbor, Washington
Experimental 2025-10-08 ValidFAA registration status code V: Valid registration. All codes
N5127V Morrisey
2150A
Fixed-wing, single engine Individual owner
Illinois
Standard 2025-10-08 ValidFAA registration status code V: Valid registration. All codes
N7152Q Cessna
172L
Fixed-wing, single engine Skyrealms LLC
Austin, Texas
Standard 2025-10-08 ValidFAA registration status code V: Valid registration. All codes
N75943 Cessna
172N
Fixed-wing, single engine Savage Island Airport (Vt15) LLC
Burlington, Vermont
Standard 2025-10-08 ValidFAA registration status code V: Valid registration. All codes
N818DV Piper
PA-28-140
Fixed-wing, single engine Individual owner
North Carolina
Standard 2025-10-08 ValidFAA registration status code V: Valid registration. All codes
N95105 Piper
PA-28-140
Fixed-wing, single engine Airbud Aviation LLC
Morristown, New Jersey
Standard 2025-10-08 ValidFAA registration status code V: Valid registration. All codes
N9876G Cessna
172L
Fixed-wing, single engine Kentucky Lake Aviation LLC
Huntingdon, Tennessee
Standard 2025-10-08 ValidFAA registration status code V: Valid registration. All codes
N3287E Cessna
172N
Fixed-wing, single engine Off Course Aero Ventures LLC
Mechanicsville, Virginia
Standard 2025-10-07 ValidFAA registration status code V: Valid registration. All codes
N4073E Piper
PA-18-150
Fixed-wing, single engine Individual owner
Alaska
Standard 2025-10-07 ValidFAA registration status code V: Valid registration. All codes
N46440 Cessna
172K
Fixed-wing, single engine Individual owner
Ohio
Standard 2025-10-07 ValidFAA registration status code V: Valid registration. All codes
N5908W Piper
PA-28-150
Fixed-wing, single engine Individual owner
Oregon
Standard 2025-10-07 ValidFAA registration status code V: Valid registration. All codes
N606RF Robert David Fitts
EXP 12-160
Fixed-wing, single engine Individual owner
Oregon
Experimental 2025-10-07 ValidFAA registration status code V: Valid registration. All codes
N6268W Piper
PA-28-140
Fixed-wing, single engine Individual owner
Washington
Standard 2025-10-07 ValidFAA registration status code V: Valid registration. All codes
N7781G Cessna
172L
Fixed-wing, single engine Kelley Aircraft LLC
Weyers Cave, Virginia
Standard 2025-10-07 ValidFAA registration status code V: Valid registration. All codes
N8450E Cessna
172N
Fixed-wing, single engine Wings Over Texas Holdings LLC
Denton, Texas
Standard 2025-10-07 ValidFAA registration status code V: Valid registration. All codes
N1025X Piper
PA-28-140
Fixed-wing, single engine Crosswind Aviation of Oklahoma LLC
Stillwater, Oklahoma
Standard 2025-10-06 ValidFAA registration status code V: Valid registration. All codes
N2618P Piper
PA-22-150
Fixed-wing, single engine Individual owner
Colorado
Standard 2025-10-06 ValidFAA registration status code V: Valid registration. All codes
N31JB Cessna
172N
Fixed-wing, single engine Lucian Aviation LLC
Modesto, California
Standard 2025-10-06 ValidFAA registration status code V: Valid registration. All codes
N61962 Cessna
172M
Fixed-wing, single engine Individual owner
Alaska
Standard 2025-10-06 ValidFAA registration status code V: Valid registration. All codes
N7327J Piper
PA-28-140
Fixed-wing, single engine Individual owner
Texas
Standard 2025-10-06 ValidFAA registration status code V: Valid registration. All codes
N803BT Cessna
172N
Fixed-wing, single engine Louisville Aircraft Leasing LLC
Louisville, Kentucky
Standard 2025-10-06 ValidFAA registration status code V: Valid registration. All codes
N809AP Phillips Edward W
RV6-A
Fixed-wing, single engine Co-owned owner
Louisiana
Experimental 2025-10-06 ValidFAA registration status code V: Valid registration. All codes
N82947 Piper
PA-18-150
Fixed-wing, single engine Co-owned owner
Wyoming
Standard 2025-10-06 ValidFAA registration status code V: Valid registration. All codes
N851LW Cessna
172K
Fixed-wing, single engine 578 Airplane Leasing INC
Kissimmee, Florida
Standard 2025-10-06 ValidFAA registration status code V: Valid registration. All codes
N9611C Stubbs Raymond L
RV4
Fixed-wing, single engine Samrat Prithviraj INC
Miami, Florida
Experimental 2025-10-06 ValidFAA registration status code V: Valid registration. All codes
N7438R Piper
PA-28-140
Fixed-wing, single engine Co-owned owner
Oklahoma
Standard 2025-10-04 ValidFAA registration status code V: Valid registration. All codes
N83411 Piper
PA-18-150
Fixed-wing, single engine State of Montana Fish Wildlife and Parks
Helena, Montana
Multiple 2025-10-04 ValidFAA registration status code V: Valid registration. All codes
N9630Q Cessna
172M
Fixed-wing, single engine Kelley Aircraft LLC
Weyers Cave, Virginia
Standard 2025-10-04 ValidFAA registration status code V: Valid registration. All codes
N3215T Cessna
177
Fixed-wing, single engine Individual owner
Texas
Standard 2025-10-03 ValidFAA registration status code V: Valid registration. All codes
N38861 Piper
PA-28-161
Fixed-wing, single engine Individual owner
Tennessee
Standard 2025-10-03 ValidFAA registration status code V: Valid registration. All codes
N4221J Piper
PA-28-140
Fixed-wing, single engine Keystone Aviation LLC
Melrose, Florida
Standard 2025-10-03 ValidFAA registration status code V: Valid registration. All codes
N5027K Bellanca
7GCBC
Fixed-wing, single engine Individual owner
Texas
Standard 2025-10-03 ValidFAA registration status code V: Valid registration. All codes
N6817L Piper
PA-18-150
Fixed-wing, single engine Individual owner
Alaska
Standard 2025-10-03 ValidFAA registration status code V: Valid registration. All codes
N8015N Piper
PA-28-140
Fixed-wing, single engine Patton Aviation LLC
Billings, Montana
Standard 2025-10-03 ValidFAA registration status code V: Valid registration. All codes
N8494R Piper
PA-28-140
Fixed-wing, single engine Cactus Air Gold LLC
Mesa, Arizona
Standard 2025-10-03 ValidFAA registration status code V: Valid registration. All codes
N9847G Cessna
172L
Fixed-wing, single engine Pilot In Command Academy
Miami, Florida
Standard 2025-10-03 ValidFAA registration status code V: Valid registration. All codes
N99104 Cessna
172P
Fixed-wing, single engine Dury Aviation Services INC
De Soto, Illinois
Standard 2025-10-03 ValidFAA registration status code V: Valid registration. All codes
N2265Y Cessna
177
Fixed-wing, single engine Co-owned owner
Iowa
Standard 2025-10-02 ValidFAA registration status code V: Valid registration. All codes
N26100 Grumman American Avn. Corp.
AA-5A
Fixed-wing, single engine Carey International Aviation Services LLC
Rockville Centre, New York
Standard 2025-10-02 ValidFAA registration status code V: Valid registration. All codes
N2941L Piper
PA-28-161
Fixed-wing, single engine Co-owned owner
Virginia
Standard 2025-10-02 ValidFAA registration status code V: Valid registration. All codes
N35423 Cessna
172I
Fixed-wing, single engine Individual owner
Alabama
Standard 2025-10-02 ValidFAA registration status code V: Valid registration. All codes
N3979Q Cessna
172L
Fixed-wing, single engine Carey International Aviation Services LLC
Rockville Centre, New York
Standard 2025-10-02 ValidFAA registration status code V: Valid registration. All codes
N43125 Piper
PA-28-151
Fixed-wing, single engine Alpha 1 Aviation LLC
Helena, Alabama
Standard 2025-10-02 ValidFAA registration status code V: Valid registration. All codes
N4692R Piper
PA-28-140
Fixed-wing, single engine Individual owner
Florida
Standard 2025-10-02 ValidFAA registration status code V: Valid registration. All codes
N712D Cessna
172N
Fixed-wing, single engine Alpha Aviation LLC
Dalhart, Texas
Standard 2025-10-02 ValidFAA registration status code V: Valid registration. All codes
N79312 Cessna
172K
Fixed-wing, single engine Individual owner
New York
Standard 2025-10-02 ValidFAA registration status code V: Valid registration. All codes
N8860D Piper
PA-22-160
Fixed-wing, single engine Individual owner
Oregon
Standard 2025-10-02 ValidFAA registration status code V: Valid registration. All codes
N9242H Cessna
172M
Fixed-wing, single engine Roland Aviation LLC
Gualala, California
Standard 2025-10-02 ValidFAA registration status code V: Valid registration. All codes
N7463D Piper
PA-18A 150
Fixed-wing, single engine Raising Cain Farms Partnership
Leland, Mississippi
Standard 2025-10-01 ValidFAA registration status code V: Valid registration. All codes
N9521W Piper
PA-28-140
Fixed-wing, single engine Flap Happy LLC
Sheridan, Wyoming
Standard 2025-10-01 ValidFAA registration status code V: Valid registration. All codes
N13268 Cessna
172M
Fixed-wing, single engine Empire Aviators LLC
Long Island City, New York
Standard 2025-09-30 ValidFAA registration status code V: Valid registration. All codes
N18GL Holloway Bernard A
GREAT LAKES 2T1A
Fixed-wing, single engine Individual owner
Iowa
Experimental 2025-09-30 ValidFAA registration status code V: Valid registration. All codes
N5074X Champion
7GCBC
Fixed-wing, single engine Co-owned owner
South Dakota
Standard 2025-09-30 ValidFAA registration status code V: Valid registration. All codes
N5910W Piper
PA-28-160
Fixed-wing, single engine Individual owner
West Virginia
Standard 2025-09-30 ValidFAA registration status code V: Valid registration. All codes
N6694W Piper
PA-28-140
Fixed-wing, single engine Individual owner
Texas
Standard 2025-09-30 ValidFAA registration status code V: Valid registration. All codes
N733FX Cessna
172N
Fixed-wing, single engine Cynthiana Flying Group CORP
Cynthiana, Kentucky
Standard 2025-09-30 ValidFAA registration status code V: Valid registration. All codes
N79488 Cessna
172K
Fixed-wing, single engine Co-owned owner
Florida
Standard 2025-09-30 ValidFAA registration status code V: Valid registration. All codes
N8133J Piper
PA-28-161
Fixed-wing, single engine Warrior Aviation LLC
Stanford, Kentucky
Standard 2025-09-30 ValidFAA registration status code V: Valid registration. All codes
N86TH Hill Stanley D
THORP T-18CW
Fixed-wing, single engine Individual owner
South Carolina
Experimental 2025-09-30 ValidFAA registration status code V: Valid registration. All codes
N940SS Carey James D
WAG AERO SUPERSPORT
Fixed-wing, single engine Individual owner
Iowa
Experimental 2025-09-30 ValidFAA registration status code V: Valid registration. All codes
N9760W Piper
PA-28-140
Fixed-wing, single engine Withheld at owner's request
Standard 2025-09-30 ValidFAA registration status code V: Valid registration. All codes
N115NS Piper
PA-18-150
Fixed-wing, single engine Individual owner
Arizona
Standard 2025-09-29 ValidFAA registration status code V: Valid registration. All codes
N16468 Piper
PA-28-140
Fixed-wing, single engine Am Aviation LLC
University City, Missouri
Standard 2025-09-29 ValidFAA registration status code V: Valid registration. All codes
N1743V Cessna
172M
Fixed-wing, single engine Withheld at owner's request
Standard 2025-09-29 ValidFAA registration status code V: Valid registration. All codes
N244DA Cessna
172M
Fixed-wing, single engine Prairie Winds Aviation LLC
Overland Park, Kansas
Standard 2025-09-29 ValidFAA registration status code V: Valid registration. All codes
N6326F Cessna
172N
Fixed-wing, single engine Airtime Holdings LLC
Charleston, South Carolina
Standard 2025-09-29 ValidFAA registration status code V: Valid registration. All codes
N6958W Piper
PA-28-140
Fixed-wing, single engine Co-owned owner
Nevada
Standard 2025-09-29 ValidFAA registration status code V: Valid registration. All codes
N70225 Cessna
172M
Fixed-wing, single engine Southeast Flight Leasing LLC
Cumming, Georgia
Standard 2025-09-29 ValidFAA registration status code V: Valid registration. All codes
N7077D Piper
PA-18-150
Fixed-wing, single engine Co-owned owner
California
Multiple 2025-09-29 ValidFAA registration status code V: Valid registration. All codes
N77KF Piper
PA-18-150
Fixed-wing, single engine Co-owned owner
Alaska
Standard 2025-09-29 ValidFAA registration status code V: Valid registration. All codes
N8264N Piper
PA-28-140
Fixed-wing, single engine
Standard 2025-09-29 ValidFAA registration status code V: Valid registration. All codes
N91255 Piper
PA-18-150
Fixed-wing, single engine Quay Ventures LLC
Alto, Texas
Standard 2025-09-29 ValidFAA registration status code V: Valid registration. All codes
N9571K Piper
PA-28-151
Fixed-wing, single engine Otter Fly LLC
Maricopa, Arizona
Standard 2025-09-29 ValidFAA registration status code V: Valid registration. All codes
N1173Y Carmean Ralph R
R1
Fixed-wing, single engine Individual owner
Indiana
Experimental 2025-09-28 ValidFAA registration status code V: Valid registration. All codes
N1524J Piper
PA-28-140
Fixed-wing, single engine Individual owner
Texas
Standard 2025-09-28 ValidFAA registration status code V: Valid registration. All codes
N4386A Piper
PA-18A
Fixed-wing, single engine Individual owner
Alaska
Standard 2025-09-28 ValidFAA registration status code V: Valid registration. All codes
N5218G Cessna
172N
Fixed-wing, single engine Co-owned owner
Ohio
Standard 2025-09-28 ValidFAA registration status code V: Valid registration. All codes
N55880 Piper
PA-28-140
Fixed-wing, single engine Wings Up LLC
Saint Augustine, Florida
Standard 2025-09-28 ValidFAA registration status code V: Valid registration. All codes
N7372J Piper
PA-28-140
Fixed-wing, single engine Individual owner
Texas
Standard 2025-09-28 ValidFAA registration status code V: Valid registration. All codes
N949W South Florida Ultralights Inc
VANS RV-9A
Fixed-wing, single engine Co-owned owner
Montana
Experimental 2025-09-28 ValidFAA registration status code V: Valid registration. All codes
N1882T Piper
PA-28-140
Fixed-wing, single engine Individual owner
Colorado
Standard 2025-09-27 ValidFAA registration status code V: Valid registration. All codes
N3746Z Piper
PA-18
Fixed-wing, single engine Individual owner
Alaska
Standard 2025-09-27 ValidFAA registration status code V: Valid registration. All codes
N5772U Piper
PA-28-140
Fixed-wing, single engine Individual owner
South Carolina
Standard 2025-09-27 ValidFAA registration status code V: Valid registration. All codes
N587PA Piper
PA-18-150
Fixed-wing, single engine Co-owned owner
Alaska
Standard 2025-09-27 ValidFAA registration status code V: Valid registration. All codes
N7487K Piper
PA-20
Fixed-wing, single engine Individual owner
Maine
Standard 2025-09-27 ValidFAA registration status code V: Valid registration. All codes
N13810 Cessna
172M
Fixed-wing, single engine Charlie Lima 1 LLC
Jacksonville, Florida
Standard 2025-09-26 ValidFAA registration status code V: Valid registration. All codes
N20789 Cessna
172M
Fixed-wing, single engine Individual owner
Washington
Standard 2025-09-26 ValidFAA registration status code V: Valid registration. All codes
N223PS Perhay James C
RV-6
Fixed-wing, single engine Co-owned owner
Washington
Experimental 2025-09-26 ValidFAA registration status code V: Valid registration. All codes
N229KB Beaty Robert B
GLASTAR
Fixed-wing, single engine Boeing Employees Flying Club St Louis
Saint Charles, Missouri
Experimental 2025-09-26 ValidFAA registration status code V: Valid registration. All codes
N28SE American Champion Aircraft
7GCBC
Fixed-wing, single engine SR Holdings LLC
Palmer, Alaska
Standard 2025-09-26 ValidFAA registration status code V: Valid registration. All codes
N33763 Piper
PA-28-151
Fixed-wing, single engine Elon Aviation LLC
Burlington, North Carolina
Standard 2025-09-26 ValidFAA registration status code V: Valid registration. All codes
N4555R Piper
PA-28-140
Fixed-wing, single engine Eagle Aeronautical Company LLC
Dover, Delaware
Standard 2025-09-26 ValidFAA registration status code V: Valid registration. All codes
N4576F Piper
PA-28-151
Fixed-wing, single engine Dakota Aviation LLC
Sioux Falls, South Dakota
Standard 2025-09-26 ValidFAA registration status code V: Valid registration. All codes
N5656W Piper
PA-28-160
Fixed-wing, single engine Individual owner
North Carolina
Standard 2025-09-26 ValidFAA registration status code V: Valid registration. All codes
N57322 Piper
PA-28-140
Fixed-wing, single engine N57322 LLC
Spout Spring, Virginia
Standard 2025-09-26 ValidFAA registration status code V: Valid registration. All codes
N7269Q Cessna
172L
Fixed-wing, single engine Individual owner
Minnesota
Standard 2025-09-26 ValidFAA registration status code V: Valid registration. All codes
N92471 Cessna
172M
Fixed-wing, single engine Individual owner
Tennessee
Standard 2025-09-26 ValidFAA registration status code V: Valid registration. All codes
N99765 Cessna
172P
Fixed-wing, single engine Tactical Intergriated Training Solutions LLC
Colorado Springs, Colorado
Standard 2025-09-26 ValidFAA registration status code V: Valid registration. All codes
N1591E Cessna
172N
Fixed-wing, single engine Wingsleasing LLC
Wichita, Kansas
Standard 2025-09-25 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.