The U.S. aircraft register, updated daily
Engines · piston (reciprocating) · data as of October 9, 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
N6963W Piper
PA-28-140
Fixed-wing, single engine Individual owner
Massachusetts
Standard 2019-02-27 ValidFAA registration status code V: Valid registration. All codes
N737NR Cessna
172N
Fixed-wing, single engine Kenmore Air Harbor LLC
Kenmore, Washington
Standard 2019-02-27 ValidFAA registration status code V: Valid registration. All codes
N84265 Cessna
172K
Fixed-wing, single engine Co-owned owner
Minnesota
Standard 2019-02-27 ValidFAA registration status code V: Valid registration. All codes
N26440 Grumman American Avn. Corp.
AA-5A
Fixed-wing, single engine Individual owner
Kentucky
Standard 2019-02-26 ValidFAA registration status code V: Valid registration. All codes
N40718 Piper
PA-28-140
Fixed-wing, single engine Datchair LLC
Chattanooga, Tennessee
Standard 2019-02-26 ValidFAA registration status code V: Valid registration. All codes
N4526X Piper
PA-28-140
Fixed-wing, single engine Co-owned owner
Pennsylvania
Standard 2019-02-26 ValidFAA registration status code V: Valid registration. All codes
N3875P Piper
PA-18A 150
Fixed-wing, single engine Co-owned owner
Montana
Multiple 2019-02-25 ValidFAA registration status code V: Valid registration. All codes
N9863G Cessna
172L
Fixed-wing, single engine Hurricane Airshows INC
La Porte, Texas
Standard 2019-02-25 ValidFAA registration status code V: Valid registration. All codes
N4461Z Piper
PA-18-150
Fixed-wing, single engine Red Leasing LLC
Juneau, Alaska
Standard 2019-02-23 ValidFAA registration status code V: Valid registration. All codes
N4528R Piper
PA-28-140
Fixed-wing, single engine Individual owner
Virginia
Standard 2019-02-23 ValidFAA registration status code V: Valid registration. All codes
N50447 Bellanca
7GCAA
Fixed-wing, single engine Individual owner
New York
Standard 2019-02-23 ValidFAA registration status code V: Valid registration. All codes
N512B Bernstein Barry M
11-SFT
Fixed-wing, single engine Individual owner
North Carolina
Experimental 2019-02-23 ValidFAA registration status code V: Valid registration. All codes
N5991U Piper
PA-28-140
Fixed-wing, single engine Individual owner
Rhode Island
Standard 2019-02-23 ValidFAA registration status code V: Valid registration. All codes
N6316D Cessna
172N
Fixed-wing, single engine Individual owner
California
Standard 2019-02-23 ValidFAA registration status code V: Valid registration. All codes
N737WA Cessna
172N
Fixed-wing, single engine Flying Taco LLC
Fountain Inn, South Carolina
Standard 2019-02-23 ValidFAA registration status code V: Valid registration. All codes
N76GZ Lees Arthur
RV-6A
Fixed-wing, single engine Individual owner
California
Experimental 2019-02-23 ValidFAA registration status code V: Valid registration. All codes
N888GM Piper
PA-28-161
Fixed-wing, single engine Individual owner
Maine
Standard 2019-02-23 ValidFAA registration status code V: Valid registration. All codes
N35528 Cessna
172I
Fixed-wing, single engine Curtin John J
Palos Heights, Illinois
Standard 2019-02-21 ValidFAA registration status code V: Valid registration. All codes
N88398 Bellanca
7GCBC
Fixed-wing, single engine 88398 LLC
Fremont, Ohio
Standard 2019-02-21 ValidFAA registration status code V: Valid registration. All codes
N9737V Cessna
172M
Fixed-wing, single engine Aero Equities LLC
Ventura, California
Standard 2019-02-21 ValidFAA registration status code V: Valid registration. All codes
N610FL Piper
PA-28-140
Fixed-wing, single engine Co-owned owner
Florida
Standard 2019-02-20 ValidFAA registration status code V: Valid registration. All codes
N8369L Cessna
172I
Fixed-wing, single engine International Air Services INC Trustee
Carson City, Nevada
Standard 2019-02-15 ValidFAA registration status code V: Valid registration. All codes
N51885 Cessna
172P
Fixed-wing, single engine Angel Aviation INC
Peoria, Arizona
Standard 2019-02-14 ValidFAA registration status code V: Valid registration. All codes
N7033F Piper
PA-28-140
Fixed-wing, single engine Individual owner
Pennsylvania
Standard 2019-02-14 ValidFAA registration status code V: Valid registration. All codes
N93JS Cessna
172M
Fixed-wing, single engine Neptune Aviation Services INC DBA
Missoula, Montana
Standard 2019-02-14 ValidFAA registration status code V: Valid registration. All codes
N98219 Cessna
172P
Fixed-wing, single engine Co-owned owner
California
Standard 2019-02-14 ValidFAA registration status code V: Valid registration. All codes
N8920D Piper
PA-22-160
Fixed-wing, single engine Individual owner
Missouri
Standard 2019-02-13 ValidFAA registration status code V: Valid registration. All codes
N114VG Robinson Helicopter
R22 BETA
Helicopter N22Vg LLC
Milford, New Jersey
Standard 2019-02-12 ValidFAA registration status code V: Valid registration. All codes
N2829 Houtz Raymond E
RV-6
Fixed-wing, single engine Individual owner
Maryland
Experimental 2019-02-12 ValidFAA registration status code V: Valid registration. All codes
N3862Q Cessna
172L
Fixed-wing, single engine Q Flyers LLC
Anaheim, California
Standard 2019-02-12 ValidFAA registration status code V: Valid registration. All codes
N5128R Cessna
172M
Fixed-wing, single engine Bend Aircraft Mechanics LLC
Bend, Oregon
Standard 2019-02-12 ValidFAA registration status code V: Valid registration. All codes
N5825U Piper
PA-28-140
Fixed-wing, single engine Co-owned owner
California
Standard 2019-02-12 ValidFAA registration status code V: Valid registration. All codes
N58DS Cessna
172N
Fixed-wing, single engine Individual owner
Pennsylvania
Standard 2019-02-12 ValidFAA registration status code V: Valid registration. All codes
N6981H Cessna
172M
Fixed-wing, single engine All2Fly LLC
Atlanta, Georgia
Standard 2019-02-12 ValidFAA registration status code V: Valid registration. All codes
N75775 Cessna
172N
Fixed-wing, single engine Rocky Mountain Aircraft Services LLC
Broomfield, Colorado
Standard 2019-02-12 ValidFAA registration status code V: Valid registration. All codes
N7DG Cessna
172N
Fixed-wing, single engine Elizabeth City State University
Elizabeth City, North Carolina
Standard 2019-02-12 ValidFAA registration status code V: Valid registration. All codes
N1769T Piper
PA-28-140
Fixed-wing, single engine Individual owner
Alabama
Standard 2019-02-11 ValidFAA registration status code V: Valid registration. All codes
N2362H Piper
PA-18-150
Fixed-wing, single engine Individual owner
Colorado
Standard 2019-02-11 ValidFAA registration status code V: Valid registration. All codes
N50338 Bellanca
7GCBC
Fixed-wing, single engine Individual owner
Texas
Standard 2019-02-11 ValidFAA registration status code V: Valid registration. All codes
N5915U Piper
PA-28-140
Fixed-wing, single engine Osorio Aviation CORP
Miami, Florida
Standard 2019-02-11 Reports overdueFAA registration status code N: Non-citizen corporation that has not returned its flight-hour reports. All codes
N82502 Piper
PA-18-150
Fixed-wing, single engine Individual owner
Colorado
Multiple 2019-02-11 ValidFAA registration status code V: Valid registration. All codes
N9576K Piper
PA-28-151
Fixed-wing, single engine Clearwater Valley Aero Club INC
Kamiah, Idaho
Standard 2019-02-11 ValidFAA registration status code V: Valid registration. All codes
N1366U Cessna
172M
Fixed-wing, single engine Aarow Aircraft Leasing LLC
Mcminnville, Oregon
Standard 2019-02-09 ValidFAA registration status code V: Valid registration. All codes
N2106C Piper
PA-28-161
Fixed-wing, single engine Individual owner
Iowa
Standard 2019-02-09 ValidFAA registration status code V: Valid registration. All codes
N399RS Salinas Ricardo
GLASTAR
Fixed-wing, single engine Withheld at owner's request
Experimental 2019-02-09 ValidFAA registration status code V: Valid registration. All codes
N4D Pitts Special
S-1C
Fixed-wing, single engine Individual owner
Texas
Experimental 2019-02-09 ValidFAA registration status code V: Valid registration. All codes
N999RA Renaissance Acft Llc
8-F
Fixed-wing, single engine Timkin INC
Wilmington, Delaware
Experimental 2019-02-09 ValidFAA registration status code V: Valid registration. All codes
N733DT Cessna
172N
Fixed-wing, single engine Individual owner
North Dakota
Standard 2019-02-08 ValidFAA registration status code V: Valid registration. All codes
N2345Q Beech
23
Fixed-wing, single engine Individual owner
Indiana
Standard 2019-02-07 ValidFAA registration status code V: Valid registration. All codes
N1949E Morgan Evart F
MORGAN EVART F PA18
Fixed-wing, single engine Individual owner
Alabama
Experimental 2019-02-06 ValidFAA registration status code V: Valid registration. All codes
N46530 Cessna
172K
Fixed-wing, single engine Co-owned owner
Texas
Standard 2019-02-06 ValidFAA registration status code V: Valid registration. All codes
N79050 Cessna
172K
Fixed-wing, single engine Co-owned owner
Indiana
Multiple 2019-02-06 ValidFAA registration status code V: Valid registration. All codes
N4569R Piper
PA-28-140
Fixed-wing, single engine Noco Flying Club LLC
Fort Collins, Colorado
Standard 2019-02-05 ValidFAA registration status code V: Valid registration. All codes
N4646R Piper
PA-28-140
Fixed-wing, single engine Warren Global LLC
Chino, California
Standard 2019-02-05 ValidFAA registration status code V: Valid registration. All codes
N6694E Cessna
172N
Fixed-wing, single engine Thunderbird Aviation LLC
Littleton, Colorado
Standard 2019-02-05 ValidFAA registration status code V: Valid registration. All codes
N83403 Piper
PA-18-150
Fixed-wing, single engine Individual owner
Alaska
Standard 2019-02-05 ValidFAA registration status code V: Valid registration. All codes
N44792 Piper
PA-28-151
Fixed-wing, single engine Ocean Air INC
Eugene, Oregon
Standard 2019-02-04 ValidFAA registration status code V: Valid registration. All codes
N5377D Cessna
172N
Fixed-wing, single engine Co-owned owner
Tennessee
Standard 2019-02-04 ValidFAA registration status code V: Valid registration. All codes
N5471W Piper
PA-28-160
Fixed-wing, single engine Individual owner
Massachusetts
Standard 2019-02-04 ValidFAA registration status code V: Valid registration. All codes
N78197 Cessna
172K
Fixed-wing, single engine Allen County Regional Airport Authority
Lima, Ohio
Standard 2019-02-04 ValidFAA registration status code V: Valid registration. All codes
N543SG Grumman American Avn. Corp.
AA-5
Fixed-wing, single engine Individual owner
Florida
Standard 2019-02-02 ValidFAA registration status code V: Valid registration. All codes
N6914B Piper
PA-22-150
Fixed-wing, single engine Individual owner
Utah
Standard 2019-02-01 ValidFAA registration status code V: Valid registration. All codes
N747JH Cessna
172N
Fixed-wing, single engine Jlm Machine CO INC
Bradenton, Florida
Standard 2019-02-01 ValidFAA registration status code V: Valid registration. All codes
N2806Q Cessna
172L
Fixed-wing, single engine Lawson Lance J
Sikeston, Missouri
Standard 2019-01-31 ValidFAA registration status code V: Valid registration. All codes
N4993P Piper
PA-18-150
Fixed-wing, single engine Individual owner
Massachusetts
Standard 2019-01-31 ValidFAA registration status code V: Valid registration. All codes
N705MM Piper
PA-28-161
Fixed-wing, single engine Individual owner
Virginia
Standard 2019-01-31 ValidFAA registration status code V: Valid registration. All codes
N8030D Zoellick Greg A
VANS RV-6A
Fixed-wing, single engine Sunrise 6500 INC
Wilmington, Delaware
Experimental 2019-01-31 ValidFAA registration status code V: Valid registration. All codes
N8826D Piper
PA-22-160
Fixed-wing, single engine Co-owned owner
Nebraska
Standard 2019-01-31 ValidFAA registration status code V: Valid registration. All codes
N99HG Ginger Herman H
RV-4
Fixed-wing, single engine Southeastern Business Machines INC
Baxley, Georgia
Experimental 2019-01-31 ValidFAA registration status code V: Valid registration. All codes
N119FF Ferdon F/Ferdon S
S-18
Fixed-wing, single engine Sky West Aviation INC Trustee
Albuquerque, New Mexico
Experimental 2019-01-30 ValidFAA registration status code V: Valid registration. All codes
N5042W Piper
PA-28
Fixed-wing, single engine C & M Enterprises LLC
Memphis, Tennessee
Standard 2019-01-30 ValidFAA registration status code V: Valid registration. All codes
N14LE Delano/Elfstrom
LONG-EZ
Fixed-wing, single engine Individual owner
Michigan
Experimental 2019-01-29 ValidFAA registration status code V: Valid registration. All codes
N2933A Piper
PA-28-161
Fixed-wing, single engine Flying Particles INC
Livermore, California
Standard 2019-01-29 ValidFAA registration status code V: Valid registration. All codes
N46636 Cessna
172K
Fixed-wing, single engine Individual owner
Washington
Standard 2019-01-29 ValidFAA registration status code V: Valid registration. All codes
N5439L Grumman American Avn. Corp.
AA-5
Fixed-wing, single engine Individual owner
California
Standard 2019-01-29 ValidFAA registration status code V: Valid registration. All codes
N739AG Cessna
172N
Fixed-wing, single engine S O W Aviation LLC
Crystal River, Florida
Standard 2019-01-29 ValidFAA registration status code V: Valid registration. All codes
N13683 Cessna
172M
Fixed-wing, single engine American Patrols INC
Midland, Texas
Standard 2019-01-28 ValidFAA registration status code V: Valid registration. All codes
N20474 Cessna
172M
Fixed-wing, single engine Co-owned owner
Utah
Standard 2019-01-28 ValidFAA registration status code V: Valid registration. All codes
N6690D Piper
PA-18-135
Fixed-wing, single engine Individual owner
Pennsylvania
Standard 2019-01-28 ValidFAA registration status code V: Valid registration. All codes
N738YW Cessna
172N
Fixed-wing, single engine Individual owner
Arizona
Standard 2019-01-28 ValidFAA registration status code V: Valid registration. All codes
N4492A Piper
PA-18-150
Fixed-wing, single engine Individual owner
Alaska
Restricted 2019-01-25 ValidFAA registration status code V: Valid registration. All codes
N7176Q Cessna
172L
Fixed-wing, single engine Jax Beach Aviation LLC
Jacksonville, Florida
Standard 2019-01-25 ValidFAA registration status code V: Valid registration. All codes
N925TA Fft Gmbh
SC01 B-160
Fixed-wing, single engine Rutan Aircraft Flying Experience
Waller, Texas
Standard 2019-01-25 ValidFAA registration status code V: Valid registration. All codes
N9617H Cessna
172M
Fixed-wing, single engine Individual owner
Montana
Standard 2019-01-25 ValidFAA registration status code V: Valid registration. All codes
N5517V Piper
PA-28-140
Fixed-wing, single engine Individual owner
Texas
Standard 2019-01-24 ValidFAA registration status code V: Valid registration. All codes
N5518K Bellanca
7GCBC
Fixed-wing, single engine Individual owner
California
Standard 2019-01-24 ValidFAA registration status code V: Valid registration. All codes
N4786E Cessna
172N
Fixed-wing, single engine Individual owner
California
Standard 2019-01-23 ValidFAA registration status code V: Valid registration. All codes
N4922G Cessna
172N
Fixed-wing, single engine Bishop Air LLC
Elk Grove, California
Standard 2019-01-23 ValidFAA registration status code V: Valid registration. All codes
N6665D Volaircraft
10A
Fixed-wing, single engine Individual owner
Michigan
Standard 2019-01-23 ValidFAA registration status code V: Valid registration. All codes
N9536L Grumman American Avn. Corp.
AA-5
Fixed-wing, single engine Individual owner
Nevada
Standard 2019-01-23 ValidFAA registration status code V: Valid registration. All codes
N1061X Cessna
172N
Fixed-wing, single engine Melbourne Flight Training LLC
Melbourne, Florida
Standard 2019-01-22 ValidFAA registration status code V: Valid registration. All codes
N2378 Robinson Helicopter
R22 BETA
Helicopter Suridutch INC
Englewood, Florida
Standard 2019-01-22 ValidFAA registration status code V: Valid registration. All codes
N369DS Cross Douglas J
LANCAIR 320
Fixed-wing, single engine Co-owned owner
California
Experimental 2019-01-22 ValidFAA registration status code V: Valid registration. All codes
N5680Y Piper
PA-18-150
Fixed-wing, single engine Co-owned owner
Iowa
Standard 2019-01-22 ValidFAA registration status code V: Valid registration. All codes
N6524H Cessna
172M
Fixed-wing, single engine Individual owner
Texas
Standard 2019-01-22 ValidFAA registration status code V: Valid registration. All codes
N6532J Cessna
172N
Fixed-wing, single engine Garner Aviation LLC
Tampa, Florida
Standard 2019-01-22 ValidFAA registration status code V: Valid registration. All codes
N8787E Piper
PA-28-151
Fixed-wing, single engine Co-owned owner
Missouri
Standard 2019-01-22 ValidFAA registration status code V: Valid registration. All codes
N6231W Piper
PA-28-140
Fixed-wing, single engine Mission Air LLC
Oklahoma City, Oklahoma
Standard 2019-01-18 ValidFAA registration status code V: Valid registration. All codes
N1901H Piper
PA-28-161
Fixed-wing, single engine Co-owned owner
Wisconsin
Standard 2019-01-17 ValidFAA registration status code V: Valid registration. All codes
N2775P Piper
PA-18A 150
Fixed-wing, single engine Individual owner
Pennsylvania
Standard 2019-01-17 ValidFAA registration status code V: Valid registration. All codes

Source: FAA Civil Aviation Registry, Releasable Aircraft Database (the engine reference table and each aircraft's engine code), October 9, 2026. Horsepower and thrust are the FAA's figures for the series, not for a particular aircraft.