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
N5436E Cessna
172N
Fixed-wing, single engine Kitsap Aviation Squadron INC
Southworth, Washington
Standard 2019-01-17 ValidFAA registration status code V: Valid registration. All codes
N6440W Piper
PA-28-140
Fixed-wing, single engine Individual owner
Texas
Standard 2019-01-17 ValidFAA registration status code V: Valid registration. All codes
N694JS Piper
PA-23-160
Fixed-wing, multi-engine Individual owner
Texas
Standard 2019-01-17 ValidFAA registration status code V: Valid registration. All codes
N83394 Piper
PA-18-150
Fixed-wing, single engine Hard Luck Aviation LLC
Tok, Alaska
Standard 2019-01-17 ValidFAA registration status code V: Valid registration. All codes
N9488G Cessna
172N
Fixed-wing, single engine Tap Solutions INC
San Diego, California
Standard 2019-01-17 ValidFAA registration status code V: Valid registration. All codes
N298Z Fosdick Jeff
VANS RV-6A
Fixed-wing, single engine Individual owner
Delaware
Experimental 2019-01-16 ValidFAA registration status code V: Valid registration. All codes
N4257H Piper
PA-14
Fixed-wing, single engine Individual owner
Montana
Standard 2019-01-16 ValidFAA registration status code V: Valid registration. All codes
N55187 Cessna
172P
Fixed-wing, single engine Aerospace Trust Management LLC Trustee
Wilmington, Delaware
Standard 2019-01-16 ValidFAA registration status code V: Valid registration. All codes
N576FL Piper
PA-28-140
Fixed-wing, single engine Rocky Top CORP
Erin, Tennessee
Standard 2019-01-16 ValidFAA registration status code V: Valid registration. All codes
N738VY Cessna
172N
Fixed-wing, single engine Rpm Aero LLC
Lincolnwood, Illinois
Standard 2019-01-16 ValidFAA registration status code V: Valid registration. All codes
N7539F Champion
7GCBC
Fixed-wing, single engine Individual owner
Alaska
Standard 2019-01-16 ValidFAA registration status code V: Valid registration. All codes
N78174 Cessna
172K
Fixed-wing, single engine Spencer Aviation INC
Delaware, Ohio
Standard 2019-01-16 ValidFAA registration status code V: Valid registration. All codes
N80531 Cessna
172M
Fixed-wing, single engine R N R Aviation LLC
Malaga, Washington
Standard 2019-01-16 ValidFAA registration status code V: Valid registration. All codes
N98PK Piper
PA-18-150
Fixed-wing, single engine Individual owner
New Hampshire
Standard 2019-01-16 ValidFAA registration status code V: Valid registration. All codes
N142HA Cessna
172M
Fixed-wing, single engine Honaker Group LLC
Sellersburg, Indiana
Standard 2019-01-15 ValidFAA registration status code V: Valid registration. All codes
N339EC Cleveland Ernest
RV-6
Fixed-wing, single engine Individual owner
Texas
Experimental 2019-01-15 ValidFAA registration status code V: Valid registration. All codes
N3552E Cessna
172N
Fixed-wing, single engine Angel Aviation INC
Peoria, Arizona
Standard 2019-01-15 ValidFAA registration status code V: Valid registration. All codes
N49DR Russell Dwight R
RUSSELL EAGLE 150
Fixed-wing, single engine Individual owner
Maine
Experimental 2019-01-15 ValidFAA registration status code V: Valid registration. All codes
N80616 Cessna
172M
Fixed-wing, single engine Aero Equities LLC
Ventura, California
Standard 2019-01-15 ValidFAA registration status code V: Valid registration. All codes
N9424E Cessna
172N
Fixed-wing, single engine Aero Equities LLC
Ventura, California
Standard 2019-01-15 ValidFAA registration status code V: Valid registration. All codes
N997SE Cessna
172N
Fixed-wing, single engine Aero Equities LLC
Ventura, California
Standard 2019-01-15 ValidFAA registration status code V: Valid registration. All codes
N209ES Messerschmitt-Bolkow-Blohm
BO 209 MONSUN
Fixed-wing, single engine Individual owner
Florida
Standard 2019-01-14 ValidFAA registration status code V: Valid registration. All codes
N2307Q Beech
23
Fixed-wing, single engine Individual owner
Kansas
Standard 2019-01-14 ValidFAA registration status code V: Valid registration. All codes
N43ZZ Brush Charles E
RV4
Fixed-wing, single engine Individual owner
Texas
Experimental 2019-01-14 ValidFAA registration status code V: Valid registration. All codes
N78672 Cessna
172K
Fixed-wing, single engine Individual owner
Washington
Standard 2019-01-14 ValidFAA registration status code V: Valid registration. All codes
N8587B Cessna
172
Fixed-wing, single engine Individual owner
Alaska
Standard 2019-01-14 ValidFAA registration status code V: Valid registration. All codes
N4453A Piper
PA-22-150
Fixed-wing, single engine Individual owner
Michigan
Standard 2019-01-11 ValidFAA registration status code V: Valid registration. All codes
N84278 Cessna
172K
Fixed-wing, single engine Ap Air LLC
Wilmington, North Carolina
Standard 2019-01-11 ValidFAA registration status code V: Valid registration. All codes
N265ER Cessna
172N
Fixed-wing, single engine Aerosolutions Group INC
Wilmington, Delaware
Standard 2019-01-10 ValidFAA registration status code V: Valid registration. All codes
N41618 Piper
PA-28-151
Fixed-wing, single engine Evv Warrior LLC
Evansville, Indiana
Standard 2019-01-10 ValidFAA registration status code V: Valid registration. All codes
N6278G Cessna
172N
Fixed-wing, single engine Individual owner
California
Standard 2019-01-10 ValidFAA registration status code V: Valid registration. All codes
N6376R Piper
PA-28-140
Fixed-wing, single engine Individual owner
California
Standard 2019-01-10 ValidFAA registration status code V: Valid registration. All codes
N7109B Piper
PA-22-150
Fixed-wing, single engine Individual owner
Missouri
Standard 2019-01-10 ValidFAA registration status code V: Valid registration. All codes
N738AZ Cessna
172N
Fixed-wing, single engine Tailwind Aviation LLC
San Diego, California
Standard 2019-01-10 ValidFAA registration status code V: Valid registration. All codes
N8588B Piper
PA-28-140
Fixed-wing, single engine Individual owner
Pennsylvania
Standard 2019-01-10 ValidFAA registration status code V: Valid registration. All codes
N1073F Cessna
172N
Fixed-wing, single engine Flydreams Aircraft Group INC
Fort Lauderdale, Florida
Standard 2019-01-09 ValidFAA registration status code V: Valid registration. All codes
N1632P Piper
PA-22
Fixed-wing, single engine Individual owner
Ohio
Standard 2019-01-09 ValidFAA registration status code V: Valid registration. All codes
N28SK Piper
PA-28-140
Fixed-wing, single engine Individual owner
Florida
Standard 2019-01-09 ValidFAA registration status code V: Valid registration. All codes
N4499P Piper
PA-23-160
Fixed-wing, multi-engine Tls Aviation
Marysville, Washington
Standard 2019-01-09 ValidFAA registration status code V: Valid registration. All codes
N5731W Piper
PA-28-160
Fixed-wing, single engine Longview Aviation LLC
Newburgh, Indiana
Standard 2019-01-09 ValidFAA registration status code V: Valid registration. All codes
N80855 Cessna
172M
Fixed-wing, single engine Individual owner
Wisconsin
Standard 2019-01-09 ValidFAA registration status code V: Valid registration. All codes
N9409L Cessna
172P
Fixed-wing, single engine Laguna Verde Leasing INC
Wilmington, Delaware
Standard 2019-01-09 ValidFAA registration status code V: Valid registration. All codes
N1926W Beech
B19
Fixed-wing, single engine Individual owner
Michigan
Standard 2019-01-08 ValidFAA registration status code V: Valid registration. All codes
N2919Z Piper
PA-22-150
Fixed-wing, single engine Individual owner
Oregon
Standard 2019-01-08 ValidFAA registration status code V: Valid registration. All codes
N300LC Cessna
172M
Fixed-wing, single engine Individual owner
Texas
Standard 2019-01-08 ValidFAA registration status code V: Valid registration. All codes
N5408W Piper
PA-28
Fixed-wing, single engine Triple M&W LLC
Bloomfield, Iowa
Standard 2019-01-08 ValidFAA registration status code V: Valid registration. All codes
N6647W Piper
PA-28-140
Fixed-wing, single engine Panama Truck Line LLC
Florissant, Missouri
Standard 2019-01-08 ValidFAA registration status code V: Valid registration. All codes
N7237Q Cessna
172L
Fixed-wing, single engine Martin Bach Aviation LLC
Cornelius, North Carolina
Standard 2019-01-08 ValidFAA registration status code V: Valid registration. All codes
N738GV Cessna
172N
Fixed-wing, single engine Individual owner
Connecticut
Standard 2019-01-08 ValidFAA registration status code V: Valid registration. All codes
N9670Q Cessna
172M
Fixed-wing, single engine Salad Days Aviation LLC
Fargo, North Dakota
Standard 2019-01-08 ValidFAA registration status code V: Valid registration. All codes
N20154 Cessna
172M
Fixed-wing, single engine Jones 170A LLC
Bridgman, Michigan
Standard 2019-01-07 ValidFAA registration status code V: Valid registration. All codes
N2359T Robinson Helicopter
R22 BETA
Helicopter Chopco LTD
Columbus, Ohio
Standard 2019-01-07 ValidFAA registration status code V: Valid registration. All codes
N24600 Beech
B19
Fixed-wing, single engine Co-owned owner
Oklahoma
Standard 2019-01-07 ValidFAA registration status code V: Valid registration. All codes
N296BC Piper
PA-18-150
Fixed-wing, single engine Individual owner
North Dakota
Standard 2019-01-07 ValidFAA registration status code V: Valid registration. All codes
N304SF Aeromere
F.8L FALCO
Fixed-wing, single engine Individual owner
Illinois
Experimental 2019-01-07 ValidFAA registration status code V: Valid registration. All codes
N4778E Cessna
172N
Fixed-wing, single engine Clemmons Flyers LLC
Green Cove Springs, Florida
Standard 2019-01-07 ValidFAA registration status code V: Valid registration. All codes
N5378K Cessna
172P
Fixed-wing, single engine Unique Educational Experiences INC
Signal Hill, California
Standard 2019-01-07 ValidFAA registration status code V: Valid registration. All codes
N7152B Piper
PA-22-150
Fixed-wing, single engine Individual owner
Washington
Standard 2019-01-07 ValidFAA registration status code V: Valid registration. All codes
N9683H Cessna
172M
Fixed-wing, single engine Individual owner
Louisiana
Restricted 2019-01-07 ValidFAA registration status code V: Valid registration. All codes
N99040 Cessna
172P
Fixed-wing, single engine Bradley Aircraft Company LLC
Columbus, Indiana
Standard 2019-01-07 ValidFAA registration status code V: Valid registration. All codes
N45WD Dawson William E
DAWSON HATZ
Fixed-wing, single engine Individual owner
Texas
Experimental 2019-01-03 ValidFAA registration status code V: Valid registration. All codes
N5158H Piper
PA-14
Fixed-wing, single engine Western Antique Aeroplane & Automobile Museum
Hood River, Oregon
Standard 2019-01-03 ValidFAA registration status code V: Valid registration. All codes
N9567H Cessna
172M
Fixed-wing, single engine Co-owned owner
Colorado
Standard 2019-01-03 ValidFAA registration status code V: Valid registration. All codes
N144SH Harris Steve L
VANS RV-4
Fixed-wing, single engine Co-owned owner
Oregon
Experimental 2019-01-02 ValidFAA registration status code V: Valid registration. All codes
N3436F Cessna
177
Fixed-wing, single engine Individual owner
Florida
Standard 2019-01-02 ValidFAA registration status code V: Valid registration. All codes
N4027P Piper
PA-23-160
Fixed-wing, multi-engine AG Air Squadron One LLC
Saint Joseph, Illinois
Standard 2019-01-02 ValidFAA registration status code V: Valid registration. All codes
N5072H Cessna
172M
Fixed-wing, single engine Individual owner
Nevada
Standard 2019-01-02 ValidFAA registration status code V: Valid registration. All codes
N5686W Piper
PA-28-150
Fixed-wing, single engine Promedical INC
Pfafftown, North Carolina
Standard 2019-01-02 ValidFAA registration status code V: Valid registration. All codes
N9109L Champion
7GCBC
Fixed-wing, single engine Yellowbird LLC
Lititz, Pennsylvania
Standard 2019-01-02 ValidFAA registration status code V: Valid registration. All codes
N44411 Piper
PA-28-151
Fixed-wing, single engine Individual owner
Texas
Standard 2018-12-31 ValidFAA registration status code V: Valid registration. All codes
N5298K Cessna
172P
Fixed-wing, single engine New England Aviation LLC
Plainville, Connecticut
Standard 2018-12-31 ValidFAA registration status code V: Valid registration. All codes
N7230F Piper
PA-28-140
Fixed-wing, single engine Benautics LLC
Wexford, Pennsylvania
Standard 2018-12-31 ValidFAA registration status code V: Valid registration. All codes
N78464 Cessna
172K
Fixed-wing, single engine Co-owned owner
Florida
Standard 2018-12-31 ValidFAA registration status code V: Valid registration. All codes
N86846 Bellanca
7GCBC
Fixed-wing, single engine Woolard Farms Leasing INC
Corning, Arkansas
Standard 2018-12-31 ValidFAA registration status code V: Valid registration. All codes
N9452H Cessna
172M
Fixed-wing, single engine Individual owner
Texas
Standard 2018-12-31 ValidFAA registration status code V: Valid registration. All codes
N733MS Cessna
172N
Fixed-wing, single engine Northgate Aviation INC
Chico, California
Standard 2018-12-28 ValidFAA registration status code V: Valid registration. All codes
N8776D Piper
PA-22-160
Fixed-wing, single engine Individual owner
Iowa
Standard 2018-12-28 ValidFAA registration status code V: Valid registration. All codes
N36115 Piper
PA-28-161
Fixed-wing, single engine Co-owned owner
Texas
Standard 2018-12-27 ValidFAA registration status code V: Valid registration. All codes
N38CK Cessna
172M
Fixed-wing, single engine Individual owner
Florida
Standard 2018-12-27 ValidFAA registration status code V: Valid registration. All codes
N903KC Robinson Helicopter
R22 BETA
Helicopter Hawaii Pacific Aviation INC
Kailua Kona, Hawaii
Standard 2018-12-27 ValidFAA registration status code V: Valid registration. All codes
N9563P Piper
PA-18-150
Fixed-wing, single engine Individual owner
Iowa
Standard 2018-12-27 ValidFAA registration status code V: Valid registration. All codes
N99553 Cessna
172P
Fixed-wing, single engine Jka LLC
Notasulga, Alabama
Standard 2018-12-27 ValidFAA registration status code V: Valid registration. All codes
N64M Piper
PA-23
Fixed-wing, multi-engine Individual owner
New Mexico
Standard 2018-12-26 ValidFAA registration status code V: Valid registration. All codes
N739NH Cessna
172N
Fixed-wing, single engine Individual owner
Tennessee
Standard 2018-12-26 ValidFAA registration status code V: Valid registration. All codes
N303SL American Champion Aircraft
7GCBC
Fixed-wing, single engine Buffalo Aircraft Maintenance LLC
Ridgecrest, California
Standard 2018-12-21 ValidFAA registration status code V: Valid registration. All codes
N46157 Cessna
172I
Fixed-wing, single engine Co-owned owner
Wisconsin
Standard 2018-12-21 ValidFAA registration status code V: Valid registration. All codes
N9767W Piper
PA-28-140
Fixed-wing, single engine Brighton Flying Club LLC
Brighton, Michigan
Standard 2018-12-21 ValidFAA registration status code V: Valid registration. All codes
N3973Q Cessna
172L
Fixed-wing, single engine Idg Elsa LLC
Ann Arbor, Michigan
Standard 2018-12-19 ValidFAA registration status code V: Valid registration. All codes
N53919 Bellanca
7GCBC
Fixed-wing, single engine Alexander Aviation LLC
Brighton, Colorado
Standard 2018-12-19 ValidFAA registration status code V: Valid registration. All codes
N9878Y Champion
7KC
Fixed-wing, single engine Individual owner
Wisconsin
Standard 2018-12-19 ValidFAA registration status code V: Valid registration. All codes
N4975F Cessna
172N
Fixed-wing, single engine Fg Aviation LLC
La Jolla, California
Standard 2018-12-18 ValidFAA registration status code V: Valid registration. All codes
N5727E Cessna
172N
Fixed-wing, single engine Individual owner
Alabama
Standard 2018-12-18 ValidFAA registration status code V: Valid registration. All codes
N6254D Cessna
172N
Fixed-wing, single engine Seventy Seven Industries LLC
Waddell, Arizona
Standard 2018-12-18 ValidFAA registration status code V: Valid registration. All codes
N1374U Cessna
172M
Fixed-wing, single engine Skydance Aviation LLC
Norfolk, Virginia
Standard 2018-12-17 ValidFAA registration status code V: Valid registration. All codes
N15373 Piper
PA-28-140
Fixed-wing, single engine Individual owner
Oklahoma
Standard 2018-12-17 ValidFAA registration status code V: Valid registration. All codes
N5432L Grumman American Avn. Corp.
AA-5
Fixed-wing, single engine Planesworld LLC
Jasper, Georgia
Standard 2018-12-17 ValidFAA registration status code V: Valid registration. All codes
N733CR Cessna
172N
Fixed-wing, single engine Individual owner
Florida
Standard 2018-12-17 ValidFAA registration status code V: Valid registration. All codes
N738GW Cessna
172N
Fixed-wing, single engine Co-owned owner
Utah
Standard 2018-12-17 ValidFAA registration status code V: Valid registration. All codes
N738NB Cessna
172N
Fixed-wing, single engine Lele Aviation LLC
Denver, Colorado
Standard 2018-12-17 ValidFAA registration status code V: Valid registration. All codes
N20264 Cessna
172M
Fixed-wing, single engine Individual owner
Texas
Standard 2018-12-15 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.