The U.S. aircraft register, updated daily
Engines · piston (reciprocating) · data as of October 8, 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.

When the aircraft were built by decade

By decade built, as a table
aircraft
19305
1940234
19502,383
19605,444
197011,405
19801,935
19901,132
2000831
201099
202055

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
Failure reports by year, as a table
reports
952
961
972
986
007
0139
0224
0339
0430
0541
0623
0732
0818
0915
1013
117
1210
134
146
152
169
171
186
191
203
211
232
251
264

Parts most often reported as the reports name them

Spar18Tube17Cylinder15Bulkhead9Alternator8Control Cable8Bolt7Carburetor7Fitting6Float6
Parts most reported, as a table
reports
Spar18
Tube17
Cylinder15
Bulkhead9
Alternator8
Control Cable8
Bolt7
Carburetor7
Fitting6
Float6

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

The whole map of how records connect · these connections as data: /graph/engine/lycoming-o-320-series.json.

Aircraft newest certificates first · 27,315

Tail no.Maker and modelGroupOwner and baseCertificateRegisteredStatus
N26300 Grumman American Avn. Corp.
AA-5A
Fixed-wing, single engine Individual owner
Ohio
Standard 2024-06-15 ValidFAA registration status code V: Valid registration. All codes
N35712 Cessna
172I
Fixed-wing, single engine Mw Flying LLC
Sanford, North Carolina
Standard 2024-06-15 ValidFAA registration status code V: Valid registration. All codes
N4273Z Piper
PA-18-150
Fixed-wing, single engine Hay Stax West
Eureka, Nevada
Multiple 2024-06-15 ValidFAA registration status code V: Valid registration. All codes
N5678W Piper
PA-28-160
Fixed-wing, single engine Individual owner
Minnesota
Standard 2024-06-15 ValidFAA registration status code V: Valid registration. All codes
N6392R Piper
PA-28-140
Fixed-wing, single engine Individual owner
Illinois
Standard 2024-06-15 ValidFAA registration status code V: Valid registration. All codes
N120CD Piper
PA-28R-200
Fixed-wing, single engine Jackson Farms Callahan Division LLC
Callahan, Florida
Standard 2024-06-14 ValidFAA registration status code V: Valid registration. All codes
N1482V Cessna
172M
Fixed-wing, single engine Individual owner
Missouri
Standard 2024-06-14 ValidFAA registration status code V: Valid registration. All codes
N191CG Gruby-Charles
SPEZIO DAL-1
Fixed-wing, single engine August Aero LLC
Kalispell, Montana
Experimental 2024-06-14 ValidFAA registration status code V: Valid registration. All codes
N20015 Cessna
172M
Fixed-wing, single engine Airplanes and Attitude LLC
Mckinney, Texas
Standard 2024-06-14 ValidFAA registration status code V: Valid registration. All codes
N3668Z Piper
PA-22-150
Fixed-wing, single engine Individual owner
Illinois
Standard 2024-06-14 ValidFAA registration status code V: Valid registration. All codes
N6814H Cessna
172M
Fixed-wing, single engine Uniform Gulf Aviation LLC
Williamstown, New Jersey
Standard 2024-06-14 ValidFAA registration status code V: Valid registration. All codes
N79995 Wade Christopher J
LONG EZ
Fixed-wing, single engine Individual owner
Florida
Experimental 2024-06-14 ValidFAA registration status code V: Valid registration. All codes
N9618U Grumman American Avn. Corp.
AA-5
Fixed-wing, single engine Individual owner
Michigan
Standard 2024-06-14 ValidFAA registration status code V: Valid registration. All codes
N9854W Piper
PA-28-140
Fixed-wing, single engine Individual owner
Alabama
Standard 2024-06-14 ValidFAA registration status code V: Valid registration. All codes
N173KA Cessna
172M
Fixed-wing, single engine Co-owned owner
Minnesota
Standard 2024-06-13 ValidFAA registration status code V: Valid registration. All codes
N2809P Piper
PA-22
Fixed-wing, single engine Individual owner
Florida
Standard 2024-06-13 ValidFAA registration status code V: Valid registration. All codes
N4018E Piper
PA-18-150
Fixed-wing, single engine Co-owned owner
Alaska
Multiple 2024-06-13 ValidFAA registration status code V: Valid registration. All codes
N4222Q Cessna
172L
Fixed-wing, single engine Bearlodge Spray Foam & Coatings LLC
Sundance, Wyoming
Standard 2024-06-13 ValidFAA registration status code V: Valid registration. All codes
N4274Q Cessna
172L
Fixed-wing, single engine Ljn Aircraft LLC
Jamestown, New York
Standard 2024-06-13 ValidFAA registration status code V: Valid registration. All codes
N46050 Piper
PA-28-140
Fixed-wing, single engine Sentinel Services Group LLC
Brooksville, Florida
Standard 2024-06-13 ValidFAA registration status code V: Valid registration. All codes
N5909E Cessna
172N
Fixed-wing, single engine Owens Flight Training LLC
Lafayette, Louisiana
Standard 2024-06-13 ValidFAA registration status code V: Valid registration. All codes
N61789 Cessna
172M
Fixed-wing, single engine Individual owner
California
Standard 2024-06-13 ValidFAA registration status code V: Valid registration. All codes
N734PF Cessna
172N
Fixed-wing, single engine Whiskey Sierra Enterprises LLC
Amarillo, Texas
Standard 2024-06-13 ValidFAA registration status code V: Valid registration. All codes
N92GR Piper
PA-28-161
Fixed-wing, single engine Individual owner
Puerto Rico
Standard 2024-06-13 ValidFAA registration status code V: Valid registration. All codes
N2523U Piper
PA-28-161
Fixed-wing, single engine Pro Renovations Savannah LTD CO
Savannah, Georgia
Standard 2024-06-11 ValidFAA registration status code V: Valid registration. All codes
N5048R Cessna
172M
Fixed-wing, single engine Sandeep Sharma LLC
Oshkosh, Wisconsin
Standard 2024-06-11 ValidFAA registration status code V: Valid registration. All codes
N7028R Piper
PA-28-140
Fixed-wing, single engine Co-owned owner
Oklahoma
Standard 2024-06-11 ValidFAA registration status code V: Valid registration. All codes
N101J Piper
PA-28-140
Fixed-wing, single engine Dresden Leasing LLC
Sheridan, Wyoming
Standard 2024-06-10 ValidFAA registration status code V: Valid registration. All codes
N40935 Piper
J3C-65
Fixed-wing, single engine International Air Services INC Trustee
Carson City, Nevada
Experimental 2024-06-10 ValidFAA registration status code V: Valid registration. All codes
N4125X Aero Commander
100
Fixed-wing, single engine Redlion Asset Recovery LLC
Port Saint Lucie, Florida
Standard 2024-06-10 ValidFAA registration status code V: Valid registration. All codes
N66TV Piper
PA-23-160
Fixed-wing, multi-engine Dodson International Parts INC
Rantoul, Kansas
Standard 2024-06-10 ValidFAA registration status code V: Valid registration. All codes
N73753 Cessna
172N
Fixed-wing, single engine Stick and Rudder Club INC
Waukegan, Illinois
Standard 2024-06-10 ValidFAA registration status code V: Valid registration. All codes
N738G Grumman American Avn. Corp.
GA-7
Fixed-wing, multi-engine Tj Air Holdings INC Trutee
Wilmington, Delaware
Standard 2024-06-10 ValidFAA registration status code V: Valid registration. All codes
N7488R Piper
PA-28-140
Fixed-wing, single engine Individual owner
Oregon
Standard 2024-06-10 ValidFAA registration status code V: Valid registration. All codes
N9042H Cessna
172M
Fixed-wing, single engine St Pete Aviation Services LLC
St Petersburg, Florida
Standard 2024-06-10 ValidFAA registration status code V: Valid registration. All codes
N4949G Cessna
172N
Fixed-wing, single engine Falcon Aviation LLC
South Saint Paul, Minnesota
Standard 2024-06-09 ValidFAA registration status code V: Valid registration. All codes
N6344N Champion
7GCAA
Fixed-wing, single engine Plane Fun INC Tr Trustee
Snellville, Georgia
Standard 2024-06-09 ValidFAA registration status code V: Valid registration. All codes
N7126D Piper
PA-22-150
Fixed-wing, single engine Individual owner
Georgia
Standard 2024-06-09 ValidFAA registration status code V: Valid registration. All codes
N26479 Grumman American Avn. Corp.
AA-5A
Fixed-wing, single engine N24679 LLC
North Royalton, Ohio
Standard 2024-06-08 ValidFAA registration status code V: Valid registration. All codes
N2824Q Cessna
172L
Fixed-wing, single engine Av8 LLC
Davenport, Iowa
Standard 2024-06-08 ValidFAA registration status code V: Valid registration. All codes
N40735 Piper
PA-28-140
Fixed-wing, single engine Individual owner
Alabama
Standard 2024-06-08 ValidFAA registration status code V: Valid registration. All codes
N41905 Piper
PA-28-151
Fixed-wing, single engine Individual owner
Arkansas
Standard 2024-06-08 ValidFAA registration status code V: Valid registration. All codes
N44CU Cessna
172N
Fixed-wing, single engine Airstar Aviation LLC
Manawa, Wisconsin
Standard 2024-06-08 ValidFAA registration status code V: Valid registration. All codes
N5176H Piper
PA-14
Fixed-wing, single engine Individual owner
Alaska
Standard 2024-06-08 ValidFAA registration status code V: Valid registration. All codes
N6261D Cessna
172N
Fixed-wing, single engine N6261D LLC
Wilmington, Delaware
Standard 2024-06-08 ValidFAA registration status code V: Valid registration. All codes
N7683G Cessna
172L
Fixed-wing, single engine Balgoyen James T
Charlotte, Michigan
Standard 2024-06-08 ValidFAA registration status code V: Valid registration. All codes
N80371 Cessna
172M
Fixed-wing, single engine N80371 LLC
Lovell, Wyoming
Standard 2024-06-08 ValidFAA registration status code V: Valid registration. All codes
N8416R Piper
PA-28-140
Fixed-wing, single engine Expert Staffing West INC
Ramona, California
Standard 2024-06-08 ValidFAA registration status code V: Valid registration. All codes
N29434 Cessna
177
Fixed-wing, single engine Individual owner
Arizona
Standard 2024-06-07 ValidFAA registration status code V: Valid registration. All codes
N3614Q Beech
A23-19
Fixed-wing, single engine Co-owned owner
Texas
Standard 2024-06-07 ValidFAA registration status code V: Valid registration. All codes
N4627R Piper
PA-28-140
Fixed-wing, single engine Individual owner
Michigan
Standard 2024-06-07 ValidFAA registration status code V: Valid registration. All codes
N4957E Piper
PA-22-150
Fixed-wing, single engine Co-owned owner
Wisconsin
Standard 2024-06-07 ValidFAA registration status code V: Valid registration. All codes
N64249 Cessna
172M
Fixed-wing, single engine N64249 LLC
Pottsboro, Texas
Standard 2024-06-07 ValidFAA registration status code V: Valid registration. All codes
N6872W Piper
PA-28-140
Fixed-wing, single engine Individual owner
Colorado
Standard 2024-06-07 ValidFAA registration status code V: Valid registration. All codes
N7035D Piper
PA-22-150
Fixed-wing, single engine Individual owner
Utah
Standard 2024-06-07 ValidFAA registration status code V: Valid registration. All codes
N9366D Piper/Sorensen
PA-18-150
Fixed-wing, single engine Longboard Energy LLC
Broken Arrow, Oklahoma
Multiple 2024-06-07 ValidFAA registration status code V: Valid registration. All codes
N9732H Cessna
172M
Fixed-wing, single engine Land & Leave LLC
Helena, Montana
Standard 2024-06-07 ValidFAA registration status code V: Valid registration. All codes
N124JJ Joyner Johnny R
RV-6A
Fixed-wing, single engine Individual owner
Virginia
Experimental 2024-06-06 ValidFAA registration status code V: Valid registration. All codes
N207RD Grumman American Avn. Corp.
AA-5A
Fixed-wing, single engine Co-owned owner
Indiana
Standard 2024-06-06 ValidFAA registration status code V: Valid registration. All codes
N2337L Beech
23
Fixed-wing, single engine Individual owner
Arizona
Standard 2024-06-06 ValidFAA registration status code V: Valid registration. All codes
N29554 Cessna
177
Fixed-wing, single engine Eagle Sky Patrol
Deadwood, South Dakota
Standard 2024-06-06 ValidFAA registration status code V: Valid registration. All codes
N3117 Pitts Special
S-1C
Fixed-wing, single engine Individual owner
Pennsylvania
Experimental 2024-06-06 ValidFAA registration status code V: Valid registration. All codes
N32223 Piper
PA-28-151
Fixed-wing, single engine Individual owner
Illinois
Standard 2024-06-06 ValidFAA registration status code V: Valid registration. All codes
N32251 Piper
PA-28-151
Fixed-wing, single engine Kful Flyers Foudation INC
Fullerton, California
Standard 2024-06-06 ValidFAA registration status code V: Valid registration. All codes
N54851 Piper
PA-18-150
Fixed-wing, single engine Individual owner
Montana
Standard 2024-06-06 ValidFAA registration status code V: Valid registration. All codes
N5678Y Piper
PA-18-150
Fixed-wing, single engine Taildragger LLC
Glade Spring, Virginia
Standard 2024-06-06 ValidFAA registration status code V: Valid registration. All codes
N5719U Piper
PA-28-140
Fixed-wing, single engine Tfa Holding CORP
Daytona Beach, Florida
Standard 2024-06-06 ValidFAA registration status code V: Valid registration. All codes
N5864U Piper
PA-28-140
Fixed-wing, single engine Individual owner
Illinois
Standard 2024-06-06 ValidFAA registration status code V: Valid registration. All codes
N6733J Piper
PA-28-140
Fixed-wing, single engine Individual owner
Georgia
Standard 2024-06-06 ValidFAA registration status code V: Valid registration. All codes
N734YB Cessna
172N
Fixed-wing, single engine Hrbk LLC
Grandview, Indiana
Standard 2024-06-06 ValidFAA registration status code V: Valid registration. All codes
N8636D Piper
PA-22-150
Fixed-wing, single engine Rui C LLC
Reddick, Florida
Standard 2024-06-06 ValidFAA registration status code V: Valid registration. All codes
N95063 Piper
PA-28-140
Fixed-wing, single engine Individual owner
Texas
Standard 2024-06-06 ValidFAA registration status code V: Valid registration. All codes
N1184D Piper
PA-28-140
Fixed-wing, single engine Individual owner
Maryland
Standard 2024-06-05 ValidFAA registration status code V: Valid registration. All codes
N172TB Cessna
172L
Fixed-wing, single engine Individual owner
Tennessee
Standard 2024-06-05 ValidFAA registration status code V: Valid registration. All codes
N2463P Piper
PA-22-150
Fixed-wing, single engine Individual owner
Georgia
Primary 2024-06-05 ValidFAA registration status code V: Valid registration. All codes
N2848Q Cessna
172L
Fixed-wing, single engine First Eclipse LTD
Richmond, Virginia
Standard 2024-06-05 ValidFAA registration status code V: Valid registration. All codes
N3659K Piper
PA-28-140
Fixed-wing, single engine Individual owner
Washington
Standard 2024-06-05 ValidFAA registration status code V: Valid registration. All codes
N5455J Cessna
172N
Fixed-wing, single engine Individual owner
Kansas
Standard 2024-06-05 ValidFAA registration status code V: Valid registration. All codes
N64114 Cessna
172M
Fixed-wing, single engine Mccully Aviation LLC
Payson, Arizona
Standard 2024-06-05 ValidFAA registration status code V: Valid registration. All codes
N733KK Cessna
172N
Fixed-wing, single engine Bend Aircraft Mechanics LLC
Bend, Oregon
Standard 2024-06-05 ValidFAA registration status code V: Valid registration. All codes
N81327 Piper
PA-28-161
Fixed-wing, single engine Individual owner
Puerto Rico
Standard 2024-06-05 ValidFAA registration status code V: Valid registration. All codes
N8731E Piper
PA-28-151
Fixed-wing, single engine Individual owner
California
Standard 2024-06-05 ValidFAA registration status code V: Valid registration. All codes
N87857 Teal-Washac Industries Inc.
TSC-1A2
Fixed-wing, single engine Qualitair LLC Trustee
Michelstadt,
Standard 2024-06-05 ValidFAA registration status code V: Valid registration. All codes
N9015L Champion
7GCBC
Fixed-wing, single engine Co-owned owner
Alaska
Standard 2024-06-05 ValidFAA registration status code V: Valid registration. All codes
N12100 Cessna
172M
Fixed-wing, single engine Tita LLC
Fajardo, Puerto Rico
Standard 2024-06-04 ValidFAA registration status code V: Valid registration. All codes
N12SV Nord
STAMPE SV4C
Fixed-wing, single engine Co-owned owner
Florida
Experimental 2024-06-04 ValidFAA registration status code V: Valid registration. All codes
N27808 Cessna
172L
Fixed-wing, single engine St George Flight Academy LLC
St George, Utah
Standard 2024-06-04 ValidFAA registration status code V: Valid registration. All codes
N31JP Piper
PA-22-150
Fixed-wing, single engine Individual owner
Kansas
Standard 2024-06-04 ValidFAA registration status code V: Valid registration. All codes
N3252P Piper
PA-23-160
Fixed-wing, multi-engine Individual owner
Massachusetts
Standard 2024-06-04 ValidFAA registration status code V: Valid registration. All codes
N3777Z Piper
PA-18
Fixed-wing, single engine Co-owned owner
Alaska
Standard 2024-06-04 ValidFAA registration status code V: Valid registration. All codes
N41684 Bellanca
7GCBC
Fixed-wing, single engine Nenahlo Thomas L
Anchorage, Alaska
Standard 2024-06-04 ValidFAA registration status code V: Valid registration. All codes
N4234Q Cessna
172L
Fixed-wing, single engine Individual owner
Pennsylvania
Standard 2024-06-04 ValidFAA registration status code V: Valid registration. All codes
N6888H Cessna
172M
Fixed-wing, single engine N6888H LLC
Wayne, New Jersey
Standard 2024-06-04 ValidFAA registration status code V: Valid registration. All codes
N8660D Piper
PA-22-150
Fixed-wing, single engine Individual owner
Ohio
Standard 2024-06-04 ValidFAA registration status code V: Valid registration. All codes
N44622 Piper
PA-28-151
Fixed-wing, single engine Xopena LLC
Kalispell, Montana
Standard 2024-06-03 ValidFAA registration status code V: Valid registration. All codes
N7319F Piper
PA-28-140
Fixed-wing, single engine Jdnichols LLC
Wichita, Kansas
Standard 2024-06-03 ValidFAA registration status code V: Valid registration. All codes
N737WQ Cessna
172N
Fixed-wing, single engine Hinote Holdings LLC
Saint Charles, Missouri
Standard 2024-06-03 ValidFAA registration status code V: Valid registration. All codes
N2394P Piper
PA-22S-150
Fixed-wing, single engine Individual owner
Tennessee
Standard 2024-06-01 ValidFAA registration status code V: Valid registration. All codes
N447WP Sparks Jerry P
GS-1 GLASTAR
Fixed-wing, single engine Individual owner
Oklahoma
Experimental 2024-06-01 ValidFAA registration status code V: Valid registration. All codes
N714MD Piper
PA-28-151
Fixed-wing, single engine Pittsburgh Pilot Training LLC
Bethel Park, Pennsylvania
Standard 2024-06-01 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 8, 2026. Horsepower and thrust are the FAA's figures for the series, not for a particular aircraft.