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
N9840W Piper
PA-28-140
Fixed-wing, single engine Wings of Grace Ministries INC
Melbourne, Florida
Standard 2021-10-22 ValidFAA registration status code V: Valid registration. All codes
N1447X Piper
PA-28-140
Fixed-wing, single engine Individual owner
New Jersey
Standard 2021-10-21 ValidFAA registration status code V: Valid registration. All codes
N1857V Cessna
172M
Fixed-wing, single engine Care Central INC
Minneapolis, Minnesota
Standard 2021-10-21 ValidFAA registration status code V: Valid registration. All codes
N3XM Mcclung Pat
RV-6
Fixed-wing, single engine Individual owner
California
Experimental 2021-10-21 ValidFAA registration status code V: Valid registration. All codes
N436RM Cessna
172N
Fixed-wing, single engine Rocky Mountain College
Billings, Montana
Standard 2021-10-21 ValidFAA registration status code V: Valid registration. All codes
N56PP Winikates Peter W
RV-6
Fixed-wing, single engine Individual owner
Illinois
Experimental 2021-10-21 ValidFAA registration status code V: Valid registration. All codes
N64JF Ferko John P
RV6A
Fixed-wing, single engine Individual owner
Texas
Experimental 2021-10-21 ValidFAA registration status code V: Valid registration. All codes
N738KP Cessna
172N
Fixed-wing, single engine Jupiter Flight Service and Investing LLC
Lithonia, Georgia
Standard 2021-10-21 ValidFAA registration status code V: Valid registration. All codes
N97358 Cessna
172P
Fixed-wing, single engine Rick Aviation INC
Newport News, Virginia
Standard 2021-10-21 ValidFAA registration status code V: Valid registration. All codes
N31284 Bellanca
7GCBC
Fixed-wing, single engine Co-owned owner
California
Standard 2021-10-20 ValidFAA registration status code V: Valid registration. All codes
N7003B Piper
PA-22-150
Fixed-wing, single engine Individual owner
Missouri
Standard 2021-10-20 ValidFAA registration status code V: Valid registration. All codes
N8815N Piper
PA-28-140
Fixed-wing, single engine Individual owner
Louisiana
Standard 2021-10-20 ValidFAA registration status code V: Valid registration. All codes
N1446X Piper
PA-28-140
Fixed-wing, single engine N15956 INC
Wilmington, Delaware
Standard 2021-10-19 ValidFAA registration status code V: Valid registration. All codes
N1804J Piper
PA-28-140
Fixed-wing, single engine Co-owned owner
Alaska
Standard 2021-10-19 ValidFAA registration status code V: Valid registration. All codes
N5082G Cessna
172N
Fixed-wing, single engine Jala Tech Services LLC
Social Circle, Georgia
Standard 2021-10-19 ValidFAA registration status code V: Valid registration. All codes
N66FU Piper
PA-22-150
Fixed-wing, single engine Individual owner
Vermont
Standard 2021-10-19 ValidFAA registration status code V: Valid registration. All codes
N7144L Grumman American Avn. Corp.
AA-5
Fixed-wing, single engine N7144L LLC
Sealy, Texas
Standard 2021-10-19 ValidFAA registration status code V: Valid registration. All codes
N7469D Piper
PA-18A
Fixed-wing, single engine Withheld at owner's request
Standard 2021-10-19 ValidFAA registration status code V: Valid registration. All codes
N8846N Piper
PA-28-140
Fixed-wing, single engine Individual owner
Texas
Standard 2021-10-19 ValidFAA registration status code V: Valid registration. All codes
N916RD Piper
PA-23-160
Fixed-wing, multi-engine Individual owner
Arkansas
Standard 2021-10-19 ValidFAA registration status code V: Valid registration. All codes
N9559W Piper
PA-28-140
Fixed-wing, single engine Individual owner
New York
Standard 2021-10-19 ValidFAA registration status code V: Valid registration. All codes
N4215Y Bellanca
7GCBC
Fixed-wing, single engine Cg Air LLC
Mason City, Iowa
Restricted 2021-10-18 ValidFAA registration status code V: Valid registration. All codes
N4352G Piper
PA-28-161
Fixed-wing, single engine Individual owner
California
Standard 2021-10-18 ValidFAA registration status code V: Valid registration. All codes
N7143G Cessna
172K
Fixed-wing, single engine Individual owner
Minnesota
Standard 2021-10-18 ValidFAA registration status code V: Valid registration. All codes
N7400R Piper
PA-28-140
Fixed-wing, single engine Individual owner
Missouri
Standard 2021-10-18 ValidFAA registration status code V: Valid registration. All codes
N7AF Cessna
172M
Fixed-wing, single engine N7Af LLC
Ronkonkoma, New York
Standard 2021-10-18 ValidFAA registration status code V: Valid registration. All codes
N80331 Cessna
172M
Fixed-wing, single engine Individual owner
Idaho
Standard 2021-10-18 ValidFAA registration status code V: Valid registration. All codes
N8246E Piper
PA-28-161
Fixed-wing, single engine Dubois Aviation INC
Chino, California
Standard 2021-10-18 ValidFAA registration status code V: Valid registration. All codes
N6615W Piper
PA-28-140
Fixed-wing, single engine Individual owner
Ohio
Standard 2021-10-16 ValidFAA registration status code V: Valid registration. All codes
N7342L Piper
PA-18-150
Fixed-wing, single engine Co-owned owner
New Hampshire
Standard 2021-10-16 ValidFAA registration status code V: Valid registration. All codes
N738DX Cessna
172N
Fixed-wing, single engine Planes Over Plains LLC
Benton, Kansas
Standard 2021-10-16 ValidFAA registration status code V: Valid registration. All codes
N7684D Piper
PA-18A 150
Fixed-wing, single engine Jsfm Flyers LLC
Saint Cloud, Minnesota
Standard 2021-10-16 ValidFAA registration status code V: Valid registration. All codes
N907KS Cessna
172N
Fixed-wing, single engine Kingsky Flight Academy LLC
Lakeland, Florida
Standard 2021-10-16 ValidFAA registration status code V: Valid registration. All codes
N13464 Cessna
172M
Fixed-wing, single engine Individual owner
Virginia
Standard 2021-10-15 ValidFAA registration status code V: Valid registration. All codes
N21950 Cessna
172M
Fixed-wing, single engine Individual owner
Oregon
Standard 2021-10-15 ValidFAA registration status code V: Valid registration. All codes
N997UP Piper
PA-20
Fixed-wing, single engine Individual owner
Montana
Standard 2021-10-15 ValidFAA registration status code V: Valid registration. All codes
N10446 Cessna
172M
Fixed-wing, single engine Schell Brothers II LLC
Rehoboth Beach, Delaware
Standard 2021-10-14 ValidFAA registration status code V: Valid registration. All codes
N41540 Piper
PA-28-151
Fixed-wing, single engine Metro Aircraft INC
Bloomington, Minnesota
Standard 2021-10-14 ValidFAA registration status code V: Valid registration. All codes
N6588H Cessna
172M
Fixed-wing, single engine Individual owner
Illinois
Standard 2021-10-14 ValidFAA registration status code V: Valid registration. All codes
N6808W Piper
PA-28-140
Fixed-wing, single engine Clear Blue Aviation LLC
Melbourne, Florida
Standard 2021-10-14 ValidFAA registration status code V: Valid registration. All codes
N739QQ Cessna
172N
Fixed-wing, single engine Bellingham Aviation Services LLC
Bellingham, Washington
Standard 2021-10-14 ValidFAA registration status code V: Valid registration. All codes
N88256 Bellanca
7GCBC
Fixed-wing, single engine Individual owner
Alaska
Standard 2021-10-14 ValidFAA registration status code V: Valid registration. All codes
N9272D Piper
PA-18A 150
Fixed-wing, single engine Mummy Mountain Med LLC
Paradise Valley, Arizona
Multiple 2021-10-14 ValidFAA registration status code V: Valid registration. All codes
N1627H Piper
PA-28-161
Fixed-wing, single engine Cirrus Services INC
Fargo, North Dakota
Standard 2021-10-13 ValidFAA registration status code V: Valid registration. All codes
N2219E Cessna
172N
Fixed-wing, single engine Sorbi Aviation INC
El Cajon, California
Standard 2021-10-13 ValidFAA registration status code V: Valid registration. All codes
N256MW Cessna
172N
Fixed-wing, single engine Lease Air LLC
Moab, Utah
Standard 2021-10-13 ValidFAA registration status code V: Valid registration. All codes
N32269 Piper
PA-28-151
Fixed-wing, single engine Parker Air LLC
Mobile, Alabama
Standard 2021-10-13 ValidFAA registration status code V: Valid registration. All codes
N33563 Piper
PA-28-151
Fixed-wing, single engine Cape Fear Aviation Services LLC
Fayetteville, North Carolina
Standard 2021-10-13 ValidFAA registration status code V: Valid registration. All codes
N708TE Cessna
172N
Fixed-wing, single engine Aileron Aviation INC
Cookeville, Tennessee
Standard 2021-10-13 ValidFAA registration status code V: Valid registration. All codes
N739AV Cessna
172N
Fixed-wing, single engine Mk914 Aviation LLC
Boynton Beach, Florida
Standard 2021-10-13 ValidFAA registration status code V: Valid registration. All codes
N739FZ Cessna
172N
Fixed-wing, single engine Sorbi Aviation INC
El Cajon, California
Standard 2021-10-13 ValidFAA registration status code V: Valid registration. All codes
N8368V Champion
7GCBC
Fixed-wing, single engine Rare Air LLC
Forsyth, Montana
Standard 2021-10-13 ValidFAA registration status code V: Valid registration. All codes
N84122 Cessna
172K
Fixed-wing, single engine Individual owner
Alaska
Standard 2021-10-13 ValidFAA registration status code V: Valid registration. All codes
N1024H Piper
PA-28-151
Fixed-wing, single engine Individual owner
Ohio
Standard 2021-10-12 ValidFAA registration status code V: Valid registration. All codes
N3132T Cessna
177
Fixed-wing, single engine Co-owned owner
Texas
Standard 2021-10-12 ValidFAA registration status code V: Valid registration. All codes
N5244X Champion
7GCBC
Fixed-wing, single engine Individual owner
Alaska
Standard 2021-10-12 ValidFAA registration status code V: Valid registration. All codes
N5773E Cessna
150
Fixed-wing, single engine Individual owner
Alaska
Standard 2021-10-12 ValidFAA registration status code V: Valid registration. All codes
N62536 Cessna
172P
Fixed-wing, single engine Individual owner
Virginia
Standard 2021-10-12 ValidFAA registration status code V: Valid registration. All codes
N71SA Piper
PA-28-140
Fixed-wing, single engine Take Off LLC
Boise, Idaho
Standard 2021-10-12 ValidFAA registration status code V: Valid registration. All codes
N83545 Piper
PA-18-150
Fixed-wing, single engine Co-owned owner
Alaska
Restricted 2021-10-12 ValidFAA registration status code V: Valid registration. All codes
N5907Y Piper
PA-18-150
Fixed-wing, single engine Co-owned owner
Alaska
Restricted 2021-10-07 ValidFAA registration status code V: Valid registration. All codes
N1181Y Piper
PA-18-135
Fixed-wing, single engine Co-owned owner
Alaska
Multiple 2021-10-06 ValidFAA registration status code V: Valid registration. All codes
N142MJ Jenkins Myron
GLASAIR
Fixed-wing, single engine Individual owner
New Mexico
Experimental 2021-10-06 ValidFAA registration status code V: Valid registration. All codes
N15HJ Cessna
172N
Fixed-wing, single engine Individual owner
Alaska
Standard 2021-10-06 ValidFAA registration status code V: Valid registration. All codes
N1706T Piper
PA-28-140
Fixed-wing, single engine Individual owner
Kentucky
Standard 2021-10-06 ValidFAA registration status code V: Valid registration. All codes
N203MD Piper
PA-28-140
Fixed-wing, single engine Sinsaja Holdings LLC
Sheridan, Wyoming
Standard 2021-10-06 ValidFAA registration status code V: Valid registration. All codes
N734SY Cessna
172N
Fixed-wing, single engine Co-owned owner
Virginia
Standard 2021-10-06 ValidFAA registration status code V: Valid registration. All codes
N8473E Cessna
172N
Fixed-wing, single engine Co-owned owner
Virginia
Standard 2021-10-06 ValidFAA registration status code V: Valid registration. All codes
N931MS Cessna
172K
Fixed-wing, single engine Coleman Aviation LLC
Livingston, Tennessee
Standard 2021-10-06 ValidFAA registration status code V: Valid registration. All codes
N2548Q Piper
PA-28-161
Fixed-wing, single engine Individual owner
Florida
Standard 2021-10-05 ValidFAA registration status code V: Valid registration. All codes
N380RB Barrows Robert E
RV-3A
Fixed-wing, single engine Individual owner
New Hampshire
Experimental 2021-10-05 ValidFAA registration status code V: Valid registration. All codes
N399CE Piper
PA-28-140
Fixed-wing, single engine Individual owner
Oregon
Standard 2021-10-05 ValidFAA registration status code V: Valid registration. All codes
N5717F Piper
PA-28-140
Fixed-wing, single engine Individual owner
Minnesota
Standard 2021-10-05 ValidFAA registration status code V: Valid registration. All codes
N7834G Cessna
172L
Fixed-wing, single engine Co-owned owner
Minnesota
Standard 2021-10-05 ValidFAA registration status code V: Valid registration. All codes
N32590 Piper
PA-28-151
Fixed-wing, single engine Individual owner
Georgia
Standard 2021-10-04 ValidFAA registration status code V: Valid registration. All codes
N44YY Piper
PA-18-150
Fixed-wing, single engine Yankee LLC
Kasilof, Alaska
Standard 2021-10-04 ValidFAA registration status code V: Valid registration. All codes
N7350J Cessna
172N
Fixed-wing, single engine Vero Technical Support INC
Pensacola, Florida
Standard 2021-10-04 ValidFAA registration status code V: Valid registration. All codes
N8872G Cessna
150F
Fixed-wing, single engine N8872G Holdings LLC
Nashville, Tennessee
Standard 2021-10-04 ValidFAA registration status code V: Valid registration. All codes
N2318J Piper
PA-18-150
Fixed-wing, single engine Co-owned owner
Alaska
Standard 2021-10-01 ValidFAA registration status code V: Valid registration. All codes
N2918E Cessna
172N
Fixed-wing, single engine Delpenn Flyers INC
Dover, Delaware
Standard 2021-10-01 ValidFAA registration status code V: Valid registration. All codes
N3929Z Piper
PA-18-150
Fixed-wing, single engine Individual owner
California
Standard 2021-10-01 ValidFAA registration status code V: Valid registration. All codes
N91CX Mccrea Charles Raymond Jr
RUTAN LONG EZ
Fixed-wing, single engine Valiair LTD CO Trustee
Casper, Wyoming
Experimental 2021-10-01 ValidFAA registration status code V: Valid registration. All codes
N232LS Cessna
172L
Fixed-wing, single engine Individual owner
Texas
Standard 2021-09-30 ValidFAA registration status code V: Valid registration. All codes
N32178 Piper
PA-28-140
Fixed-wing, single engine Nebraska Generator Service LLC
Gibbon, Nebraska
Standard 2021-09-30 ValidFAA registration status code V: Valid registration. All codes
N39995 Piper
PA-28-161
Fixed-wing, single engine Co-owned owner
Georgia
Standard 2021-09-30 ValidFAA registration status code V: Valid registration. All codes
N6990B Piper
PA-18-150
Fixed-wing, single engine E T Wells INC
Helena, Arkansas
Multiple 2021-09-30 ValidFAA registration status code V: Valid registration. All codes
N733MU Cessna
172N
Fixed-wing, single engine Sanford Aircraft LLC
Winter Springs, Florida
Standard 2021-09-30 ValidFAA registration status code V: Valid registration. All codes
N35530 Cessna
172I
Fixed-wing, single engine Trs Holdings LLC
Kalispell, Montana
Standard 2021-09-29 ValidFAA registration status code V: Valid registration. All codes
N41980 Piper
PA-28-151
Fixed-wing, single engine Individual owner
Arkansas
Standard 2021-09-29 ValidFAA registration status code V: Valid registration. All codes
N4297Z Piper
PA-18-150
Fixed-wing, single engine Acadiana Cub LLC
Abbeville, Louisiana
Standard 2021-09-29 ValidFAA registration status code V: Valid registration. All codes
N187FJ Lentsch Florenz J
BD-4-T
Fixed-wing, single engine Individual owner
Minnesota
Experimental 2021-09-28 ValidFAA registration status code V: Valid registration. All codes
N21799 Cessna
172M
Fixed-wing, single engine Individual owner
Alabama
Standard 2021-09-28 ValidFAA registration status code V: Valid registration. All codes
N3520P Piper
PA-22-150
Fixed-wing, single engine Individual owner
North Carolina
Standard 2021-09-28 ValidFAA registration status code V: Valid registration. All codes
N6956B Piper/Pierce Tony
PA-22-150
Fixed-wing, single engine Bushplane Lab LLC
Wilderville, Oregon
Standard 2021-09-28 ValidFAA registration status code V: Valid registration. All codes
N78757 Cessna
172K
Fixed-wing, single engine Individual owner
Georgia
Standard 2021-09-28 ValidFAA registration status code V: Valid registration. All codes
N7887G Cessna
172L
Fixed-wing, single engine Individual owner
Texas
Standard 2021-09-28 ValidFAA registration status code V: Valid registration. All codes
N31923 Piper
PA-28-161
Fixed-wing, single engine Metro Aicraft CO
Bloomington, Minnesota
Standard 2021-09-27 ValidFAA registration status code V: Valid registration. All codes
N32375 Piper
PA-28-151
Fixed-wing, single engine Individual owner
Alaska
Standard 2021-09-27 ValidFAA registration status code V: Valid registration. All codes
N626RC Murphy Kevin T
VANS RV-4
Fixed-wing, single engine Individual owner
Alabama
Experimental 2021-09-27 ValidFAA registration status code V: Valid registration. All codes
N6291W Piper
PA-28-140
Fixed-wing, single engine Individual owner
Florida
Standard 2021-09-27 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.