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.

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

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
N7609F Cessna
172N
Fixed-wing, single engine Co-owned owner
Montana
Standard 2025-05-14 ValidFAA registration status code V: Valid registration. All codes
N8756C Piper
PA-28-151
Fixed-wing, single engine Dt Aviation LLC
Ontario, California
Standard 2025-05-14 ValidFAA registration status code V: Valid registration. All codes
N9874W Piper
PA-28-140
Fixed-wing, single engine Individual owner
Washington
Standard 2025-05-14 ValidFAA registration status code V: Valid registration. All codes
N9898U Grumman American Avn. Corp.
AA-5A
Fixed-wing, single engine Co-owned owner
Ohio
Standard 2025-05-14 ValidFAA registration status code V: Valid registration. All codes
N10HF Piper
PA-22-150
Fixed-wing, single engine Individual owner
Alaska
Standard 2025-05-13 ValidFAA registration status code V: Valid registration. All codes
N2575U Piper
PA-28-161
Fixed-wing, single engine Cavu Aircraft LLC
Salisbury, North Carolina
Standard 2025-05-13 ValidFAA registration status code V: Valid registration. All codes
N739YE Cessna
172N
Fixed-wing, single engine Sundance Air Services INC
Alameda, California
Standard 2025-05-13 ValidFAA registration status code V: Valid registration. All codes
N747L A Pair Of Jacks
RV-6A
Fixed-wing, single engine
Experimental 2025-05-13 ValidFAA registration status code V: Valid registration. All codes
N91553 Cessna
172M
Fixed-wing, single engine Individual owner
Massachusetts
Standard 2025-05-13 ValidFAA registration status code V: Valid registration. All codes
N9761W Piper
PA-28-140
Fixed-wing, single engine Individual owner
New York
Standard 2025-05-13 ValidFAA registration status code V: Valid registration. All codes
N98226 Piper
PA-28-140
Fixed-wing, single engine Individual owner
Florida
Standard 2025-05-13 ValidFAA registration status code V: Valid registration. All codes
N34SF Piper
PA-18A
Fixed-wing, single engine Co-owned owner
Oklahoma
Standard 2025-05-12 ValidFAA registration status code V: Valid registration. All codes
N7114D Piper
PA-22-150
Fixed-wing, single engine Individual owner
Oregon
Standard 2025-05-12 ValidFAA registration status code V: Valid registration. All codes
N7894C Piper
PA-28-151
Fixed-wing, single engine Individual owner
Ohio
Standard 2025-05-12 ValidFAA registration status code V: Valid registration. All codes
N922CT Roberts James C
LONG-EZ
Fixed-wing, single engine Sweptwing Holdings LLC
Houston, Texas
Experimental 2025-05-12 ValidFAA registration status code V: Valid registration. All codes
N9961V Cessna
172M
Fixed-wing, single engine Ck Leasing Services LLC
Wilmington, Delaware
Standard 2025-05-12 ValidFAA registration status code V: Valid registration. All codes
N614AC American Champion Aircraft
7GCAA
Fixed-wing, single engine Lawless Aviation LLC
Fishers, Indiana
Standard 2025-05-11 ValidFAA registration status code V: Valid registration. All codes
N7965H Piper
PA-12
Fixed-wing, single engine Individual owner
Alabama
Multiple 2025-05-10 ValidFAA registration status code V: Valid registration. All codes
N2371T Piper
PA-28-140
Fixed-wing, single engine Co-owned owner
South Carolina
Standard 2025-05-09 ValidFAA registration status code V: Valid registration. All codes
N2375Q Beech
23
Fixed-wing, single engine Taxes Suck LLC
Orlando, Florida
Standard 2025-05-09 ValidFAA registration status code V: Valid registration. All codes
N3045Z Piper
PA-22-160
Fixed-wing, single engine Individual owner
Maryland
Standard 2025-05-09 ValidFAA registration status code V: Valid registration. All codes
N3100 Pitts Special
S-1C
Fixed-wing, single engine Individual owner
California
Experimental 2025-05-09 ValidFAA registration status code V: Valid registration. All codes
N95376 Piper
PA-28-140
Fixed-wing, single engine Team K Outfitters LLC
Memphis, Missouri
Standard 2025-05-09 ValidFAA registration status code V: Valid registration. All codes
N13552 Cessna
172M
Fixed-wing, single engine Newton Property Leasing LLC
Greene, Iowa
Standard 2025-05-08 ValidFAA registration status code V: Valid registration. All codes
N1855J Piper
PA-28-140
Fixed-wing, single engine Individual owner
Oklahoma
Standard 2025-05-08 ValidFAA registration status code V: Valid registration. All codes
N280PT Piper
PA-28-161
Fixed-wing, single engine Azure Leasing LLC
Oakdale, Pennsylvania
Standard 2025-05-08 ValidFAA registration status code V: Valid registration. All codes
N3452K Piper
PA-28-140
Fixed-wing, single engine Withheld at owner's request
Standard 2025-05-08 ValidFAA registration status code V: Valid registration. All codes
N3992Z Piper
PA-18-150
Fixed-wing, single engine Individual owner
Wyoming
Standard 2025-05-08 ValidFAA registration status code V: Valid registration. All codes
N4346J Piper
PA-28-140
Fixed-wing, single engine Individual owner
California
Standard 2025-05-08 ValidFAA registration status code V: Valid registration. All codes
N4783 Cochran-Stitts
SA-11A
Fixed-wing, single engine Individual owner
Arkansas
Experimental 2025-05-08 ValidFAA registration status code V: Valid registration. All codes
N5479L Grumman American Avn. Corp.
AA-5
Fixed-wing, single engine Liv4More LLC
Ammon, Idaho
Standard 2025-05-08 ValidFAA registration status code V: Valid registration. All codes
N607PT Piper
PA-28-161
Fixed-wing, single engine Azure Leasing LLC
Oakdale, Pennsylvania
Standard 2025-05-08 ValidFAA registration status code V: Valid registration. All codes
N608PT Piper
PA-28-161
Fixed-wing, single engine Azure Leasing LLC
Oakdale, Pennsylvania
Standard 2025-05-08 ValidFAA registration status code V: Valid registration. All codes
N7144R Piper
PA-28-140
Fixed-wing, single engine Skyview LLC
Omaha, Nebraska
Standard 2025-05-08 ValidFAA registration status code V: Valid registration. All codes
N734LN Nicholson Leroy
BD4
Fixed-wing, single engine Individual owner
Pennsylvania
Experimental 2025-05-08 ValidFAA registration status code V: Valid registration. All codes
N7457L Piper
PA-18-150
Fixed-wing, single engine Piper Lover LLC
Centennial, Colorado
Standard 2025-05-08 ValidFAA registration status code V: Valid registration. All codes
N95419 Piper
PA-28-140
Fixed-wing, single engine Individual owner
North Dakota
Standard 2025-05-08 ValidFAA registration status code V: Valid registration. All codes
N9625S Champion
7GCAA
Fixed-wing, single engine Individual owner
West Virginia
Standard 2025-05-08 ValidFAA registration status code V: Valid registration. All codes
N9754D Piper
PA-22-150
Fixed-wing, single engine Individual owner
North Carolina
Standard 2025-05-08 ValidFAA registration status code V: Valid registration. All codes
N238SS Todd Trueblood
SUPER STOL XL
Fixed-wing, single engine Appling Aviation LLC
Baxley, Georgia
Experimental 2025-05-07 ValidFAA registration status code V: Valid registration. All codes
N32440 Piper
PA-28-151
Fixed-wing, single engine Individual owner
Alabama
Standard 2025-05-07 ValidFAA registration status code V: Valid registration. All codes
N416RB Starduster Too
SA300
Fixed-wing, single engine Individual owner
California
Experimental 2025-05-07 ValidFAA registration status code V: Valid registration. All codes
N4238F Piper
PA-28-151
Fixed-wing, single engine Aviation Trust Company LLC
Oklahoma City, Oklahoma
Standard 2025-05-07 ValidFAA registration status code V: Valid registration. All codes
N5850U Piper
PA-28-140
Fixed-wing, single engine Marfair LLC
Freeport, Texas
Standard 2025-05-07 ValidFAA registration status code V: Valid registration. All codes
N7026D Piper
PA-22-150
Fixed-wing, single engine Sfcaa LLC
Nashville, Tennessee
Standard 2025-05-07 ValidFAA registration status code V: Valid registration. All codes
N733XL Cessna
172N
Fixed-wing, single engine Airspeed Marketing LLC
Phoenix, Arizona
Standard 2025-05-07 ValidFAA registration status code V: Valid registration. All codes
N7539D Piper
PA-22-150
Fixed-wing, single engine Eaa Chapter 99 INC
Vero Beach, Florida
Standard 2025-05-07 ValidFAA registration status code V: Valid registration. All codes
N813SS Piper
PA-28-151
Fixed-wing, single engine Lake In the Hills Aviation LLC
Algonquin, Illinois
Standard 2025-05-07 ValidFAA registration status code V: Valid registration. All codes
N84832 Cessna
172K
Fixed-wing, single engine Raven Canyon Aviation N84832 LLC
Klamath Falls, Oregon
Standard 2025-05-07 ValidFAA registration status code V: Valid registration. All codes
N186RA American Champion Aircraft
7GCBC
Fixed-wing, single engine Big T Aviation LLC
Wilmington, Delaware
Standard 2025-05-06 ValidFAA registration status code V: Valid registration. All codes
N22205 Cessna
172M
Fixed-wing, single engine Individual owner
Ohio
Standard 2025-05-06 ValidFAA registration status code V: Valid registration. All codes
N2223Q Piper
PA-28-161
Fixed-wing, single engine Co-owned owner
Kansas
Standard 2025-05-06 ValidFAA registration status code V: Valid registration. All codes
N26896 Gulfstream American Corp
AA-5A
Fixed-wing, single engine Magnus Air Ct LLC
Manchester, Connecticut
Standard 2025-05-06 ValidFAA registration status code V: Valid registration. All codes
N32525 Piper
PA-28-140
Fixed-wing, single engine Individual owner
Florida
Standard 2025-05-06 ValidFAA registration status code V: Valid registration. All codes
N4948G Cessna
172N
Fixed-wing, single engine Trece INC
Adair, Oklahoma
Standard 2025-05-06 ValidFAA registration status code V: Valid registration. All codes
N649SA Symphony Aircraft Ind Inc
SA 160
Fixed-wing, single engine Individual owner
Texas
Standard 2025-05-06 ValidFAA registration status code V: Valid registration. All codes
N6747H Cessna
172M
Fixed-wing, single engine Aurora Skyhawks
Portland, Oregon
Standard 2025-05-06 ValidFAA registration status code V: Valid registration. All codes
N7211D Piper
PA-22-150
Fixed-wing, single engine Individual owner
Illinois
Standard 2025-05-06 ValidFAA registration status code V: Valid registration. All codes
N9243H Cessna
172M
Fixed-wing, single engine Seward Air Taxi LLC
Seward, Alaska
Standard 2025-05-06 ValidFAA registration status code V: Valid registration. All codes
N9391E Cessna
172N
Fixed-wing, single engine Individual owner
Nevada
Standard 2025-05-06 ValidFAA registration status code V: Valid registration. All codes
N99981 Cessna
172P
Fixed-wing, single engine Sky High Leasing Services LLC
Lakeland, Florida
Standard 2025-05-06 ValidFAA registration status code V: Valid registration. All codes
N4272Z Piper
PA-18-150
Fixed-wing, single engine Lightning Leasing LLC
Anchorage, Alaska
Standard 2025-05-05 ValidFAA registration status code V: Valid registration. All codes
N5317H Cessna
172M
Fixed-wing, single engine Hottel Cessna LLC
Prescott, Arizona
Standard 2025-05-05 ValidFAA registration status code V: Valid registration. All codes
N5461W Piper
PA-28-160
Fixed-wing, single engine Individual owner
Pennsylvania
Standard 2025-05-05 ValidFAA registration status code V: Valid registration. All codes
N61822 Cessna
172M
Fixed-wing, single engine Wings Over Texas Holdings LLC
Denton, Texas
Standard 2025-05-05 ValidFAA registration status code V: Valid registration. All codes
N734UP Cessna
172N
Fixed-wing, single engine Individual owner
Texas
Standard 2025-05-05 ValidFAA registration status code V: Valid registration. All codes
N8191X Piper
PA-28-161
Fixed-wing, single engine A&J Aircraft Leasing INC
Burlington, Colorado
Standard 2025-05-05 ValidFAA registration status code V: Valid registration. All codes
N5243W Piper
PA-28
Fixed-wing, single engine Individual owner
Wyoming
Standard 2025-05-04 ValidFAA registration status code V: Valid registration. All codes
N8806N Piper
PA-28-140
Fixed-wing, single engine Individual owner
Arizona
Standard 2025-05-03 ValidFAA registration status code V: Valid registration. All codes
N1027Y Abbott Dudley L
LEVITATOR
Fixed-wing, single engine Individual owner
Montana
Experimental 2025-05-02 ValidFAA registration status code V: Valid registration. All codes
N1159Y Cessna
150B
Fixed-wing, single engine Individual owner
Georgia
Standard 2025-05-02 ValidFAA registration status code V: Valid registration. All codes
N1792J Piper
PA-28-140
Fixed-wing, single engine Individual owner
New York
Standard 2025-05-02 ValidFAA registration status code V: Valid registration. All codes
N2193P Finicle Noel C
RV-4
Fixed-wing, single engine Individual owner
Ohio
Experimental 2025-05-02 ValidFAA registration status code V: Valid registration. All codes
N3444Z Piper
PA-22-160
Fixed-wing, single engine Individual owner
Illinois
Standard 2025-05-02 ValidFAA registration status code V: Valid registration. All codes
N4365J Piper
PA-28-140
Fixed-wing, single engine Individual owner
South Carolina
Standard 2025-05-02 ValidFAA registration status code V: Valid registration. All codes
N44668 Piper
PA-28-151
Fixed-wing, single engine Wolf Aviation Network INC
Westfield, Massachusetts
Standard 2025-05-02 ValidFAA registration status code V: Valid registration. All codes
N4621R Piper
PA-28-140
Fixed-wing, single engine Individual owner
California
Standard 2025-05-02 ValidFAA registration status code V: Valid registration. All codes
N71HH Cessna
172L
Fixed-wing, single engine Eastern Slope Aviation Academy
North Conway, New Hampshire
Standard 2025-05-02 ValidFAA registration status code V: Valid registration. All codes
N7756D Piper
PA-22-150
Fixed-wing, single engine Co-owned owner
Alaska
Standard 2025-05-02 ValidFAA registration status code V: Valid registration. All codes
N9131H Cessna
172M
Fixed-wing, single engine Individual owner
Virginia
Standard 2025-05-02 ValidFAA registration status code V: Valid registration. All codes
N95369 Piper
PA-28-140
Fixed-wing, single engine Individual owner
Pennsylvania
Standard 2025-05-02 ValidFAA registration status code V: Valid registration. All codes
N105JR Piper
PA-18-150
Fixed-wing, single engine Co-owned owner
Oklahoma
Standard 2025-05-01 ValidFAA registration status code V: Valid registration. All codes
N116PC American Champion Aircraft
7GCBC
Fixed-wing, single engine Global Piloting Solutions LLC
Mankato, Minnesota
Standard 2025-05-01 ValidFAA registration status code V: Valid registration. All codes
N15759 Piper
PA-28-140
Fixed-wing, single engine Individual owner
Indiana
Standard 2025-05-01 ValidFAA registration status code V: Valid registration. All codes
N1610G Champion
7GCBC
Fixed-wing, single engine Co-owned owner
Alaska
Standard 2025-05-01 ValidFAA registration status code V: Valid registration. All codes
N3475E Cessna
172N
Fixed-wing, single engine Individual owner
California
Standard 2025-05-01 ValidFAA registration status code V: Valid registration. All codes
N42811 Piper
PA-28-151
Fixed-wing, single engine Individual owner
California
Standard 2025-05-01 ValidFAA registration status code V: Valid registration. All codes
N4660Y Piper
PA-18-150
Fixed-wing, single engine Individual owner
Alaska
Standard 2025-05-01 ValidFAA registration status code V: Valid registration. All codes
N551JH Piper
PA-28-140
Fixed-wing, single engine N551Jh Sky Holdings LLC
Grand Ledge, Michigan
Standard 2025-05-01 ValidFAA registration status code V: Valid registration. All codes
N733KG Cessna
172N
Fixed-wing, single engine Nesher Aviation LLC
Jacksonville, Florida
Standard 2025-05-01 ValidFAA registration status code V: Valid registration. All codes
N9005L Champion
7GCAA
Fixed-wing, single engine Colorado Twin Bonanza LLC
Broomfield, Colorado
Standard 2025-05-01 ValidFAA registration status code V: Valid registration. All codes
N123SF American Champion Aircraft
7GCAA
Fixed-wing, single engine Individual owner
Oregon
Standard 2025-04-30 ValidFAA registration status code V: Valid registration. All codes
N2310Q Beech
23
Fixed-wing, single engine Individual owner
California
Standard 2025-04-30 ValidFAA registration status code V: Valid registration. All codes
N2879X Cessna
177
Fixed-wing, single engine Individual owner
Georgia
Standard 2025-04-30 ValidFAA registration status code V: Valid registration. All codes
N32191 Piper
PA-28-151
Fixed-wing, single engine Czyszczon Aviation LLC
St Pete Beach, Florida
Standard 2025-04-30 ValidFAA registration status code V: Valid registration. All codes
N5554W Piper
PA-28-160
Fixed-wing, single engine Flyworx LLC
Kalispell, Montana
Standard 2025-04-30 ValidFAA registration status code V: Valid registration. All codes
N9274H Cessna
172M
Fixed-wing, single engine Wings Over Texas Holdings LLC
Denton, Texas
Standard 2025-04-30 ValidFAA registration status code V: Valid registration. All codes
N221KL Cessna
172M
Fixed-wing, single engine Mather Don
Sandusky, Ohio
Standard 2025-04-29 ValidFAA registration status code V: Valid registration. All codes
N3676X Aero Commander
100
Fixed-wing, single engine Individual owner
Kentucky
Standard 2025-04-29 ValidFAA registration status code V: Valid registration. All codes
N42477 Piper
PA-28-151
Fixed-wing, single engine Individual owner
California
Standard 2025-04-29 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.