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
N7073G Cessna
172K
Fixed-wing, single engine Sky Warriors LLC
Hayward, California
Standard 2026-03-28 ValidFAA registration status code V: Valid registration. All codes
N7280C Piper
PA-28-140
Fixed-wing, single engine Griff Air LLC
Aurora, Oregon
Standard 2026-03-28 ValidFAA registration status code V: Valid registration. All codes
N73388 Cessna
172M
Fixed-wing, single engine Wings Over Texas Holdings LLC
Denton, Texas
Standard 2026-03-28 ValidFAA registration status code V: Valid registration. All codes
N734RA Cessna
172N
Fixed-wing, single engine Aurora 17 Holdings LLC
Aurora, Oregon
Standard 2026-03-28 ValidFAA registration status code V: Valid registration. All codes
N80336 Cessna
172M
Fixed-wing, single engine Individual owner
Michigan
Standard 2026-03-28 ValidFAA registration status code V: Valid registration. All codes
N8433R Piper
PA-28-140
Fixed-wing, single engine Co-owned owner
Washington
Standard 2026-03-28 ValidFAA registration status code V: Valid registration. All codes
N8624V Bellanca
7GCBC
Fixed-wing, single engine Individual owner
Utah
Standard 2026-03-28 ValidFAA registration status code V: Valid registration. All codes
N102AC Cessna
172N
Fixed-wing, single engine Windfall Capital Ventures LLC
Westerville, Ohio
Multiple 2026-03-27 ValidFAA registration status code V: Valid registration. All codes
N327MB Whipkey Baine
LONG-EZ
Fixed-wing, single engine Captain Steeeve LLC
N Topsail Beach, North Carolina
Experimental 2026-03-27 ValidFAA registration status code V: Valid registration. All codes
N3318T Cessna
177
Fixed-wing, single engine Pipeair LLC
Vancouver, Washington
Standard 2026-03-27 ValidFAA registration status code V: Valid registration. All codes
N872NC Cessna
172P
Fixed-wing, single engine Mt Vernon Airport Authority
Mount Vernon, Illinois
Standard 2026-03-27 ValidFAA registration status code V: Valid registration. All codes
N38211 Piper
PA-28-161
Fixed-wing, single engine Watford Aeroservice LLC
Watford City, North Dakota
Standard 2026-03-26 ValidFAA registration status code V: Valid registration. All codes
N739VR Cessna
172N
Fixed-wing, single engine Mid-Atlantic Air Ventures INC
Richmond, Virginia
Standard 2026-03-26 ValidFAA registration status code V: Valid registration. All codes
N83582 Piper
PA-18-150
Fixed-wing, single engine Co-owned owner
Alaska
Standard 2026-03-26 ValidFAA registration status code V: Valid registration. All codes
N9244D Piper
PA-22-160
Fixed-wing, single engine Individual owner
Texas
Standard 2026-03-26 ValidFAA registration status code V: Valid registration. All codes
N976 Drew William M
ACRO II
Fixed-wing, single engine Individual owner
Tennessee
Experimental 2026-03-26 ValidFAA registration status code V: Valid registration. All codes
N9813W Piper
PA-28-140
Fixed-wing, single engine Adelza Group Holdings LLC
Orlando, Florida
Standard 2026-03-26 ValidFAA registration status code V: Valid registration. All codes
N9909U Grumman American Avn. Corp.
AA-5A
Fixed-wing, single engine Individual owner
Washington
Standard 2026-03-26 ValidFAA registration status code V: Valid registration. All codes
N26116 Grumman American Avn. Corp.
AA-5A
Fixed-wing, single engine Individual owner
Tennessee
Standard 2026-03-25 ValidFAA registration status code V: Valid registration. All codes
N49VZ Zorn Ralph G
ASOB
Fixed-wing, single engine Individual owner
Alabama
Experimental 2026-03-25 ValidFAA registration status code V: Valid registration. All codes
N5101R Beech
B19
Fixed-wing, single engine Individual owner
Nevada
Standard 2026-03-25 ValidFAA registration status code V: Valid registration. All codes
N632SF Fumia Samuel J
RV-4
Fixed-wing, single engine Individual owner
California
Experimental 2026-03-25 ValidFAA registration status code V: Valid registration. All codes
N74924 Piper
PA-18-150
Fixed-wing, single engine Rs Specialties LLC
Anchorage, Alaska
Restricted 2026-03-25 ValidFAA registration status code V: Valid registration. All codes
N212LB Beckert Bruce A
RV-6
Fixed-wing, single engine Individual owner
Michigan
Experimental 2026-03-24 ValidFAA registration status code V: Valid registration. All codes
N3023T Piper
PA-28-161
Fixed-wing, single engine International Air Services INC Trustee
Carson City, Nevada
Standard 2026-03-24 ValidFAA registration status code V: Valid registration. All codes
N320MV Omf
OMF-100-160
Fixed-wing, single engine Individual owner
Idaho
Standard 2026-03-24 ValidFAA registration status code V: Valid registration. All codes
N4297M Piper
PA-28-161
Fixed-wing, single engine International Air Services INC Trustee
Carson City, Nevada
Standard 2026-03-24 ValidFAA registration status code V: Valid registration. All codes
N669WB Bailey Jr Donnie W
RV-9A
Fixed-wing, single engine Individual owner
Arkansas
Experimental 2026-03-24 ValidFAA registration status code V: Valid registration. All codes
N8388Y Piper
PA-28-161
Fixed-wing, single engine International Air Services INC Trustee
Carson City, Nevada
Standard 2026-03-24 ValidFAA registration status code V: Valid registration. All codes
N8408D Piper
PA-22-160
Fixed-wing, single engine Aeromarine Consulting INC
Brandon, Florida
Standard 2026-03-24 ValidFAA registration status code V: Valid registration. All codes
N8427K Piper
PA-28-161
Fixed-wing, single engine International Air Services INC Trustee
Carson City, Nevada
Standard 2026-03-24 ValidFAA registration status code V: Valid registration. All codes
N9660H Cessna
172M
Fixed-wing, single engine Cdb Group Holdings LLC
Sheridan, Wyoming
Standard 2026-03-24 ValidFAA registration status code V: Valid registration. All codes
N160HP Dory Joe
VANS RV-4
Fixed-wing, single engine Individual owner
Florida
Experimental 2026-03-23 ValidFAA registration status code V: Valid registration. All codes
N7713 Pitts Special
S-1
Fixed-wing, single engine Jf Aerosports LLC
Vineland, New Jersey
Experimental 2026-03-22 ValidFAA registration status code V: Valid registration. All codes
N2357L Beech
23
Fixed-wing, single engine Lords Assets LLC
Columbus, Ohio
Standard 2026-03-21 ValidFAA registration status code V: Valid registration. All codes
N26814 Gulfstream American Corp
AA-5A
Fixed-wing, single engine Desert Cat Aviation LLC
Tempe, Arizona
Standard 2026-03-21 ValidFAA registration status code V: Valid registration. All codes
N4005E Piper
PA-18-150
Fixed-wing, single engine Rmo Property Management LLC
Elkin, North Carolina
Standard 2026-03-21 ValidFAA registration status code V: Valid registration. All codes
N41241 Piper
PA-28-151
Fixed-wing, single engine N84Dt LLC
Missoula, Montana
Standard 2026-03-21 ValidFAA registration status code V: Valid registration. All codes
N5389W Piper
PA-28-160
Fixed-wing, single engine Co-owned owner
Texas
Standard 2026-03-21 ValidFAA registration status code V: Valid registration. All codes
N5607U Piper
PA-28-140
Fixed-wing, single engine Individual owner
Arizona
Standard 2026-03-21 ValidFAA registration status code V: Valid registration. All codes
N621E Champion
7GC
Fixed-wing, single engine Individual owner
Missouri
Standard 2026-03-21 ValidFAA registration status code V: Valid registration. All codes
N6602Y Piper
PA-28-140
Fixed-wing, single engine Southern Aircraft Consultancy INC Trustee
Casper, Wyoming
Standard 2026-03-21 ValidFAA registration status code V: Valid registration. All codes
N969SD Piper
PA-28-140
Fixed-wing, single engine Individual owner
Ohio
Standard 2026-03-21 ValidFAA registration status code V: Valid registration. All codes
N78182 Cessna
172K
Fixed-wing, single engine Individual owner
Arkansas
Standard 2026-03-20 ValidFAA registration status code V: Valid registration. All codes
N99253 Cessna
172P
Fixed-wing, single engine Mitiguy Aviation LLC
Stow, Massachusetts
Standard 2026-03-20 ValidFAA registration status code V: Valid registration. All codes
N2539G Piper
PA-38-112
Fixed-wing, single engine Tpt Aviation LLC
Caseville, Michigan
Standard 2026-03-19 ValidFAA registration status code V: Valid registration. All codes
N695FL Piper
PA-28-140
Fixed-wing, single engine Co-owned owner
Nebraska
Standard 2026-03-19 ValidFAA registration status code V: Valid registration. All codes
N9443H Cessna
172M
Fixed-wing, single engine Individual owner
California
Standard 2026-03-19 ValidFAA registration status code V: Valid registration. All codes
N12525 Cessna
172M
Fixed-wing, single engine Tam United Logistic LLC
Toledo, Ohio
Standard 2026-03-18 ValidFAA registration status code V: Valid registration. All codes
N15648 Piper
PA-28-140
Fixed-wing, single engine Individual owner
Texas
Standard 2026-03-18 ValidFAA registration status code V: Valid registration. All codes
N15770 Piper
PA-28-140
Fixed-wing, single engine Individual owner
Kentucky
Standard 2026-03-18 ValidFAA registration status code V: Valid registration. All codes
N6979H Cessna
172M
Fixed-wing, single engine Individual owner
Arizona
Standard 2026-03-18 ValidFAA registration status code V: Valid registration. All codes
N737WR Cessna
172N
Fixed-wing, single engine N737Wr LLC
Jacksonville, Florida
Standard 2026-03-18 ValidFAA registration status code V: Valid registration. All codes
N75381 Piper
PA-28-151
Fixed-wing, single engine Doublewide Holdings LLC
Three Rivers, California
Standard 2026-03-18 ValidFAA registration status code V: Valid registration. All codes
N9862W Piper
PA-28-140
Fixed-wing, single engine Individual owner
Florida
Standard 2026-03-18 ValidFAA registration status code V: Valid registration. All codes
N117WT Cessna
172P
Fixed-wing, single engine Fly Whiskey Tango LLC
Scottsdale, Arizona
Standard 2026-03-17 ValidFAA registration status code V: Valid registration. All codes
N12213 Cessna
172M
Fixed-wing, single engine Top Flight Aviation INC
Corona, California
Standard 2026-03-17 ValidFAA registration status code V: Valid registration. All codes
N5747F Piper
PA-28-140
Fixed-wing, single engine Msol Air LLC
Lakeland, Florida
Standard 2026-03-17 ValidFAA registration status code V: Valid registration. All codes
N81612 Piper
PA-28-161
Fixed-wing, single engine Av8Rlounge LLC
Columbia, South Carolina
Standard 2026-03-17 ValidFAA registration status code V: Valid registration. All codes
N97116 Cessna
172P
Fixed-wing, single engine N97116 LLC
Hector, Minnesota
Standard 2026-03-17 ValidFAA registration status code V: Valid registration. All codes
N100WH Hoatson Wendell M
RV6A
Fixed-wing, single engine Individual owner
California
Experimental 2026-03-16 ValidFAA registration status code V: Valid registration. All codes
N8484R Piper
PA-28-140
Fixed-wing, single engine Legacy Aviation Group LLC
Orrstown, Pennsylvania
Standard 2026-03-16 ValidFAA registration status code V: Valid registration. All codes
N9766D Piper
PA-22-160
Fixed-wing, single engine Co-owned owner
California
Standard 2026-03-16 ValidFAA registration status code V: Valid registration. All codes
N733MX Cessna
172N
Fixed-wing, single engine Individual owner
Ohio
Standard 2026-03-15 ValidFAA registration status code V: Valid registration. All codes
N7404R Piper
PA-28-140
Fixed-wing, single engine T&G Aviation Services LLC
Temple, Texas
Standard 2026-03-15 ValidFAA registration status code V: Valid registration. All codes
N831TS Piper
PA-28-151
Fixed-wing, single engine Wingsleasing LLC
Wichita, Kansas
Standard 2026-03-15 ValidFAA registration status code V: Valid registration. All codes
N1264T Piper
PA-28-140
Fixed-wing, single engine Individual owner
Texas
Standard 2026-03-14 ValidFAA registration status code V: Valid registration. All codes
N2893P Piper
PA-18A 150
Fixed-wing, single engine Oaero LLC
Boise, Idaho
Restricted 2026-03-14 ValidFAA registration status code V: Valid registration. All codes
N3804Z Piper
PA-18-150
Fixed-wing, single engine Individual owner
Montana
Standard 2026-03-14 ValidFAA registration status code V: Valid registration. All codes
N8287B Piper
PA-18-150
Fixed-wing, single engine Individual owner
Oregon
Standard 2026-03-14 ValidFAA registration status code V: Valid registration. All codes
N9593K Piper
PA-28-140
Fixed-wing, single engine Shoham Aviation LLC
Richmond, Texas
Standard 2026-03-14 ValidFAA registration status code V: Valid registration. All codes
N406AF Piper
PA-28-140
Fixed-wing, single engine N406Af LLC
Fort Pierce, Florida
Standard 2026-03-13 ValidFAA registration status code V: Valid registration. All codes
N726AC American Champion Aircraft
7GCBC
Fixed-wing, single engine Grass Roots Aviation LLC
Bend, Oregon
Standard 2026-03-13 ValidFAA registration status code V: Valid registration. All codes
N737TM Cessna
172N
Fixed-wing, single engine Liberty Aviation LLC
Henderson, Nevada
Standard 2026-03-13 ValidFAA registration status code V: Valid registration. All codes
N8877E Piper
PA-28-140
Fixed-wing, single engine Parrot Flying LLC
San Francisco, California
Standard 2026-03-13 ValidFAA registration status code V: Valid registration. All codes
N8973D Piper
PA-18A 150
Fixed-wing, single engine Individual owner
Montana
Multiple 2026-03-13 ValidFAA registration status code V: Valid registration. All codes
N1543J Piper
PA-28-140
Fixed-wing, single engine Individual owner
Alaska
Standard 2026-03-12 ValidFAA registration status code V: Valid registration. All codes
N19842 Cessna
172M
Fixed-wing, single engine Ocala Services INC
Ocala, Florida
Standard 2026-03-12 ValidFAA registration status code V: Valid registration. All codes
N5088T Beech
19A
Fixed-wing, single engine Co-owned owner
Ohio
Standard 2026-03-12 ValidFAA registration status code V: Valid registration. All codes
N198FT Piper
PA-28-161
Fixed-wing, single engine Individual owner
Florida
Standard 2026-03-11 ValidFAA registration status code V: Valid registration. All codes
N3071D Piper
PA-28-161
Fixed-wing, single engine Daniella Levi & Associates PC
Fresh Meadows, New York
Standard 2026-03-11 ValidFAA registration status code V: Valid registration. All codes
N42PE Eastham Paul C
RV-9A
Fixed-wing, single engine Individual owner
Oregon
Experimental 2026-03-11 ValidFAA registration status code V: Valid registration. All codes
N47491 Piper
PA-28-161
Fixed-wing, single engine Jefferson City Aviation INC
Jefferson City, Missouri
Standard 2026-03-11 ValidFAA registration status code V: Valid registration. All codes
N8260V Piper
PA-28-161
Fixed-wing, single engine Red Rifle Aviation LLC
Richmond, Texas
Standard 2026-03-11 ValidFAA registration status code V: Valid registration. All codes
N9117L Champion
7GCBC
Fixed-wing, single engine Willkris Aviation Services LLC
Smithfield, Virginia
Standard 2026-03-11 ValidFAA registration status code V: Valid registration. All codes
N9577V Cessna
172M
Fixed-wing, single engine Mdr Flying INC Trustee
Wilmington, Delaware
Standard 2026-03-11 ValidFAA registration status code V: Valid registration. All codes
N4790G Cessna
172N
Fixed-wing, single engine Wings Over Texas Holdings LLC
Denton, Texas
Standard 2026-03-10 ValidFAA registration status code V: Valid registration. All codes
N818VH Robinson Helicopter
R22 BETA
Helicopter Altitude Aviatin Services LLC
Mountain Home, Idaho
Standard 2026-03-10 ValidFAA registration status code V: Valid registration. All codes
N83316 Piper
PA-18-150
Fixed-wing, single engine Individual owner
Montana
Standard 2026-03-10 ValidFAA registration status code V: Valid registration. All codes
N9766W Piper
PA-28-140
Fixed-wing, single engine Individual owner
Arkansas
Standard 2026-03-10 ValidFAA registration status code V: Valid registration. All codes
N172ER Socata
TB 9 TAMPICO
Fixed-wing, single engine Individual owner
Florida
Standard 2026-03-09 ValidFAA registration status code V: Valid registration. All codes
N36246 Bellanca
7GCBC
Fixed-wing, single engine Individual owner
Georgia
Standard 2026-03-09 ValidFAA registration status code V: Valid registration. All codes
N3733P Piper
PA-22-150
Fixed-wing, single engine Individual owner
Kentucky
Standard 2026-03-09 ValidFAA registration status code V: Valid registration. All codes
N739PH Cessna
172N
Fixed-wing, single engine Majestic Flyer LLC
Oxnard, California
Standard 2026-03-09 ValidFAA registration status code V: Valid registration. All codes
N7551L Piper
PA-18-150
Fixed-wing, single engine Individual owner
Arizona
Multiple 2026-03-09 ValidFAA registration status code V: Valid registration. All codes
N8289J Varga Aircraft Corp.
2150A
Fixed-wing, single engine Individual owner
Texas
Standard 2026-03-09 ValidFAA registration status code V: Valid registration. All codes
N49TM Keithley Thomas E
RV-4
Fixed-wing, single engine Individual owner
Wisconsin
Experimental 2026-03-08 ValidFAA registration status code V: Valid registration. All codes
N7770G Cessna
172L
Fixed-wing, single engine Co-owned owner
Wisconsin
Standard 2026-03-08 ValidFAA registration status code V: Valid registration. All codes
N2941U Piper
PA-28-161
Fixed-wing, single engine Individual owner
New York
Standard 2026-03-07 ValidFAA registration status code V: Valid registration. All codes
N1484T Piper
PA-28-140
Fixed-wing, single engine Individual owner
Idaho
Standard 2026-03-06 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.