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
N4461A Piper
PA-22-150
Fixed-wing, single engine Co-owned owner
Oregon
Standard 2023-01-14 ValidFAA registration status code V: Valid registration. All codes
N7069R Piper
PA-28-140
Fixed-wing, single engine Individual owner
Tennessee
Standard 2023-01-14 ValidFAA registration status code V: Valid registration. All codes
N8062E Cessna
172N
Fixed-wing, single engine Aviation Specialized Services LLC
Lewisville, Texas
Standard 2023-01-14 ValidFAA registration status code V: Valid registration. All codes
N9996U Grumman American Avn. Corp.
AA-5A
Fixed-wing, single engine Co-owned owner
Nevada
Standard 2023-01-14 ValidFAA registration status code V: Valid registration. All codes
N1588E Cessna
172N
Fixed-wing, single engine Geaux Giddum 1 LLC
Brandon, Mississippi
Standard 2023-01-13 ValidFAA registration status code V: Valid registration. All codes
N2358Z Beech
23
Fixed-wing, single engine Individual owner
California
Standard 2023-01-13 ValidFAA registration status code V: Valid registration. All codes
N5AA Piper
PA-28-140
Fixed-wing, single engine Individual owner
Virginia
Standard 2023-01-13 ValidFAA registration status code V: Valid registration. All codes
N6111D Piper
PA-22-150
Fixed-wing, single engine Adventure Flight LLC
Duchesne, Utah
Standard 2023-01-13 ValidFAA registration status code V: Valid registration. All codes
N82676 Piper
PA-28-161
Fixed-wing, single engine Accelerated Aviation Instruction LLC
Owatonna, Minnesota
Standard 2023-01-13 ValidFAA registration status code V: Valid registration. All codes
N8763E Piper
PA-28-151
Fixed-wing, single engine Individual owner
Connecticut
Standard 2023-01-13 ValidFAA registration status code V: Valid registration. All codes
N9187M Mcumber Donald H
VANS RV-4
Fixed-wing, single engine Individual owner
Oklahoma
Experimental 2023-01-13 ValidFAA registration status code V: Valid registration. All codes
N98AM Piper/Meyer Alfred R
PA 18-150
Fixed-wing, single engine Co-owned owner
Alaska
Standard 2023-01-13 ValidFAA registration status code V: Valid registration. All codes
N12FM Piper
PA-28-161
Fixed-wing, single engine Delaware State University
Dover, Delaware
Standard 2023-01-12 ValidFAA registration status code V: Valid registration. All codes
N1918V Cessna
172M
Fixed-wing, single engine Individual owner
Illinois
Standard 2023-01-12 ValidFAA registration status code V: Valid registration. All codes
N1920W Beech
B19
Fixed-wing, single engine Individual owner
Virginia
Standard 2023-01-12 ValidFAA registration status code V: Valid registration. All codes
N20413 Cessna
172M
Fixed-wing, single engine Individual owner
Washington
Restricted 2023-01-12 ValidFAA registration status code V: Valid registration. All codes
N2856T Piper
PA-28-161
Fixed-wing, single engine Individual owner
North Carolina
Standard 2023-01-12 ValidFAA registration status code V: Valid registration. All codes
N44507 Piper
PA-28-140
Fixed-wing, single engine Individual owner
Tennessee
Standard 2023-01-12 ValidFAA registration status code V: Valid registration. All codes
N5423E Cessna
172N
Fixed-wing, single engine Skywarrior Flight Training LLC
Pensacola, Florida
Standard 2023-01-12 ValidFAA registration status code V: Valid registration. All codes
N56149 Piper
PA-28-140
Fixed-wing, single engine Lets Fly LLC
Albemarle, North Carolina
Standard 2023-01-12 ValidFAA registration status code V: Valid registration. All codes
N56SJ American Champion Aircraft
7GCBC
Fixed-wing, single engine Co-owned owner
California
Standard 2023-01-12 ValidFAA registration status code V: Valid registration. All codes
N738HS Cessna
172N
Fixed-wing, single engine Flycarolina LLC
Concord, North Carolina
Standard 2023-01-12 ValidFAA registration status code V: Valid registration. All codes
N750K Piper
PA-18-150
Fixed-wing, single engine Ogk Aviation LLC
Mandan, North Dakota
Standard 2023-01-12 ValidFAA registration status code V: Valid registration. All codes
N8276J Varga Aircraft Corp.
2150A
Fixed-wing, single engine Co-owned owner
Arizona
Standard 2023-01-12 ValidFAA registration status code V: Valid registration. All codes
N9939U Grumman American Avn. Corp.
AA-5A
Fixed-wing, single engine Individual owner
Florida
Standard 2023-01-12 ValidFAA registration status code V: Valid registration. All codes
N162DS Key Clarence W
O-320 EXP
Fixed-wing, single engine Individual owner
Colorado
Experimental 2023-01-11 ValidFAA registration status code V: Valid registration. All codes
N172FP Cessna
172L
Fixed-wing, single engine Oceanic Air LLC
Key West, Florida
Standard 2023-01-11 ValidFAA registration status code V: Valid registration. All codes
N41547 Piper
PA-28-151
Fixed-wing, single engine Grassroots Aviation INC
Starkville, Mississippi
Standard 2023-01-11 ValidFAA registration status code V: Valid registration. All codes
N44PF Piper
PA-28-140
Fixed-wing, single engine Vaayu Aviation LLC
Newark, California
Standard 2023-01-11 ValidFAA registration status code V: Valid registration. All codes
N522F Cessna
172K
Fixed-wing, single engine N522F LLC
Titusville, Florida
Standard 2023-01-11 ValidFAA registration status code V: Valid registration. All codes
N68553 Bellanca
7GCBC
Fixed-wing, single engine Individual owner
Washington
Standard 2023-01-11 ValidFAA registration status code V: Valid registration. All codes
N7133L Grumman American Avn. Corp.
AA-5
Fixed-wing, single engine Individual owner
Arkansas
Standard 2023-01-11 ValidFAA registration status code V: Valid registration. All codes
N7228G Cessna
172K
Fixed-wing, single engine Individual owner
Illinois
Standard 2023-01-11 ValidFAA registration status code V: Valid registration. All codes
N79966 Cessna
172K
Fixed-wing, single engine N79966 LLC
Titusville, Florida
Standard 2023-01-11 ValidFAA registration status code V: Valid registration. All codes
N8286N Piper
PA-28-140
Fixed-wing, single engine Individual owner
New Jersey
Standard 2023-01-11 ValidFAA registration status code V: Valid registration. All codes
N96751 Cessna
172P
Fixed-wing, single engine Dsr Cherokee 180 LLC
Dallas, Texas
Standard 2023-01-11 ValidFAA registration status code V: Valid registration. All codes
N32376 Piper
PA-28-151
Fixed-wing, single engine Delaware State University
Dover, Delaware
Standard 2023-01-10 ValidFAA registration status code V: Valid registration. All codes
N8724N Piper
PA-28-140
Fixed-wing, single engine Sea 2 Sea LLC
Cantonment, Florida
Standard 2023-01-09 ValidFAA registration status code V: Valid registration. All codes
N34DN American Champion Aircraft
7GCAA
Fixed-wing, single engine Co-owned owner
Texas
Standard 2023-01-08 ValidFAA registration status code V: Valid registration. All codes
N4346R Cessna
172M
Fixed-wing, single engine Flyhnz LLC
Oxford, North Carolina
Standard 2023-01-08 ValidFAA registration status code V: Valid registration. All codes
N6407W Piper
PA-28-140
Fixed-wing, single engine Individual owner
North Carolina
Standard 2023-01-08 ValidFAA registration status code V: Valid registration. All codes
N1051X Piper
PA-28-140
Fixed-wing, single engine Individual owner
Louisiana
Standard 2023-01-07 ValidFAA registration status code V: Valid registration. All codes
N13SK Cessna
172N
Fixed-wing, single engine Flydreams Aircraft Group INC
Fort Lauderdale, Florida
Standard 2023-01-07 ValidFAA registration status code V: Valid registration. All codes
N5741W Piper
PA-28-160
Fixed-wing, single engine Individual owner
Texas
Standard 2023-01-07 ValidFAA registration status code V: Valid registration. All codes
N2838F Piper
PA-28-161
Fixed-wing, single engine Co-owned owner
Texas
Standard 2023-01-06 ValidFAA registration status code V: Valid registration. All codes
N316NF Beech
23
Fixed-wing, single engine Steenland Mark R II
Killeen, Texas
Standard 2023-01-06 ValidFAA registration status code V: Valid registration. All codes
N32400 Piper
PA-28-151
Fixed-wing, single engine Individual owner
Ohio
Standard 2023-01-06 ValidFAA registration status code V: Valid registration. All codes
N4206H Piper
PA-14
Fixed-wing, single engine Leonard James P
Eagle River, Alaska
Multiple 2023-01-06 ValidFAA registration status code V: Valid registration. All codes
N56943 Piper
PA-28-140
Fixed-wing, single engine Individual owner
California
Standard 2023-01-06 ValidFAA registration status code V: Valid registration. All codes
N5752U Piper
PA-28-140
Fixed-wing, single engine Riggin Flight Service
Madison, South Dakota
Standard 2023-01-06 ValidFAA registration status code V: Valid registration. All codes
N6884H Cessna
172M
Fixed-wing, single engine Wings Over Texas Holdings LLC
Denton, Texas
Standard 2023-01-06 ValidFAA registration status code V: Valid registration. All codes
N74ST Woods Richard I
BUSHBY M-II
Fixed-wing, single engine Individual owner
Arizona
Experimental 2023-01-06 ValidFAA registration status code V: Valid registration. All codes
N234LE Hightower James H
RUTAN LONG E Z
Fixed-wing, single engine Co-owned owner
Louisiana
Experimental 2023-01-05 ValidFAA registration status code V: Valid registration. All codes
N29509 Cessna
177
Fixed-wing, single engine Empty Nest Aviation LLC
Mckinney, Texas
Standard 2023-01-05 ValidFAA registration status code V: Valid registration. All codes
N298RW Whittridge Richard D
TWINSTARR
Rotorcraft Individual owner
South Carolina
Experimental 2023-01-05 ValidFAA registration status code V: Valid registration. All codes
N3566E Cessna
172N
Fixed-wing, single engine Individual owner
California
Standard 2023-01-05 ValidFAA registration status code V: Valid registration. All codes
N4443Z Piper
PA-18-150
Fixed-wing, single engine Individual owner
Alaska
Standard 2023-01-05 ValidFAA registration status code V: Valid registration. All codes
N4586A Piper
PA-18-150
Fixed-wing, single engine Individual owner
Montana
Multiple 2023-01-05 ValidFAA registration status code V: Valid registration. All codes
N4629D Cessna
172N
Fixed-wing, single engine Orion Aviation Aircraft LLC
Carlsbad, California
Standard 2023-01-05 ValidFAA registration status code V: Valid registration. All codes
N47674 Piper
PA-28-161
Fixed-wing, single engine Individual owner
Tennessee
Standard 2023-01-05 ValidFAA registration status code V: Valid registration. All codes
N5414L Grumman American Avn. Corp.
AA-5
Fixed-wing, single engine Individual owner
South Carolina
Standard 2023-01-05 ValidFAA registration status code V: Valid registration. All codes
N5679S Beech
A23-19
Fixed-wing, single engine Individual owner
Washington
Standard 2023-01-05 ValidFAA registration status code V: Valid registration. All codes
N639SA Symphony Aircraft Ind Inc
SA 160
Fixed-wing, single engine Co-owned owner
Montana
Standard 2023-01-05 ValidFAA registration status code V: Valid registration. All codes
N8732D Piper
PA-22-160
Fixed-wing, single engine Mgs Ventures LTD
Wilmington, Delaware
Standard 2023-01-05 ValidFAA registration status code V: Valid registration. All codes
N20626 Cessna
172M
Fixed-wing, single engine Co-owned owner
Ohio
Standard 2023-01-04 ValidFAA registration status code V: Valid registration. All codes
N8314M Cessna
A150K
Fixed-wing, single engine Individual owner
California
Standard 2023-01-04 ValidFAA registration status code V: Valid registration. All codes
N8452B Piper
PA-28-161
Fixed-wing, single engine K & K Commercial Leasing LLC
Indiana, Pennsylvania
Standard 2023-01-04 ValidFAA registration status code V: Valid registration. All codes
N91024 Piper
PA-18-150
Fixed-wing, single engine Blue Water Consulting LLC
Dorchester, South Carolina
Standard 2023-01-04 ValidFAA registration status code V: Valid registration. All codes
N1207U Cessna
172M
Fixed-wing, single engine Individual owner
California
Standard 2023-01-03 ValidFAA registration status code V: Valid registration. All codes
N121GB Cessna
172K
Fixed-wing, single engine Aviation Academy LLC
Wichita, Kansas
Standard 2023-01-03 ValidFAA registration status code V: Valid registration. All codes
N26360 Grumman American Avn. Corp.
AA-5A
Fixed-wing, single engine Co-owned owner
South Carolina
Standard 2023-01-03 ValidFAA registration status code V: Valid registration. All codes
N4328N Piper
PA-28-161
Fixed-wing, single engine Individual owner
Pennsylvania
Standard 2023-01-03 ValidFAA registration status code V: Valid registration. All codes
N5005T Piper
PA-28-140
Fixed-wing, single engine Weekend Air LLC
Incline Village, Nevada
Standard 2023-01-03 ValidFAA registration status code V: Valid registration. All codes
N78408 Cessna
172K
Fixed-wing, single engine On the Fly Aero LLC
Ocean City, New Jersey
Standard 2023-01-03 ValidFAA registration status code V: Valid registration. All codes
N9466D Piper
PA-18A 150
Fixed-wing, single engine Individual owner
Utah
Multiple 2023-01-03 ValidFAA registration status code V: Valid registration. All codes
N9725D Piper
PA-22-150
Fixed-wing, single engine Individual owner
Michigan
Standard 2023-01-03 ValidFAA registration status code V: Valid registration. All codes
N16RG Champion
7GCBC
Fixed-wing, single engine Homer Ace INC DBA
Tulsa, Oklahoma
Standard 2023-01-02 ValidFAA registration status code V: Valid registration. All codes
N20014 Cessna
172M
Fixed-wing, single engine Co-owned owner
Nevada
Standard 2023-01-02 ValidFAA registration status code V: Valid registration. All codes
N2729X American
AA-1
Fixed-wing, single engine Moeplanes CO
Boynton Beach, Florida
Standard 2023-01-02 ValidFAA registration status code V: Valid registration. All codes
N2834X Cessna
177
Fixed-wing, single engine Etown Powersports
Elizabethtown, Kentucky
Standard 2023-01-02 ValidFAA registration status code V: Valid registration. All codes
N286YM Young Robin
GLASAIR-WRY
Fixed-wing, single engine Bug Smasher LLC
Mitchell, South Dakota
Experimental 2023-01-02 ValidFAA registration status code V: Valid registration. All codes
N2929X Cessna
177
Fixed-wing, single engine Individual owner
Florida
Standard 2023-01-02 ValidFAA registration status code V: Valid registration. All codes
N35486 Cessna
172I
Fixed-wing, single engine Metz Air LLC
Little Rock, Arkansas
Experimental 2023-01-02 ValidFAA registration status code V: Valid registration. All codes
N3685A Piper
PA-18-135
Fixed-wing, single engine Individual owner
Washington
Restricted 2023-01-02 ValidFAA registration status code V: Valid registration. All codes
N4167L Piper
PA-28-181
Fixed-wing, single engine Plane Nonsense INC
Middletown, Delaware
Standard 2023-01-02 ValidFAA registration status code V: Valid registration. All codes
N44167 Piper
PA-28-151
Fixed-wing, single engine Sound Technology Matters LLC
Zeeland, Michigan
Standard 2023-01-02 ValidFAA registration status code V: Valid registration. All codes
N47391 Piper
PA-28-161
Fixed-wing, single engine Crown Heights Footcare Plc
Brooklyn, New York
Standard 2023-01-02 ValidFAA registration status code V: Valid registration. All codes
N5114K Cessna
172N
Fixed-wing, single engine Parrillo Development and Real Estate LLC
Moorestown, New Jersey
Standard 2023-01-02 ValidFAA registration status code V: Valid registration. All codes
N54812 Cessna
172P
Fixed-wing, single engine E & e Aviation LLC
Kingshill, U.S. Virgin Islands
Standard 2023-01-02 ValidFAA registration status code V: Valid registration. All codes
N5701F Piper
PA-28-140
Fixed-wing, single engine Individual owner
Illinois
Standard 2023-01-02 ValidFAA registration status code V: Valid registration. All codes
N5848W Piper
PA-28-150
Fixed-wing, single engine Individual owner
Arkansas
Standard 2023-01-02 ValidFAA registration status code V: Valid registration. All codes
N6457W Piper
PA-28-140
Fixed-wing, single engine Individual owner
New York
Standard 2023-01-02 ValidFAA registration status code V: Valid registration. All codes
N7422R Piper
PA-28-140
Fixed-wing, single engine Individual owner
California
Standard 2023-01-02 ValidFAA registration status code V: Valid registration. All codes
N75536 Cessna
172N
Fixed-wing, single engine N75536 LLC
Palm City, Florida
Standard 2023-01-02 ValidFAA registration status code V: Valid registration. All codes
N75795 Cessna
172N
Fixed-wing, single engine Individual owner
Texas
Standard 2023-01-02 ValidFAA registration status code V: Valid registration. All codes
N8895N Piper
PA-28-140
Fixed-wing, single engine Individual owner
West Virginia
Standard 2023-01-02 ValidFAA registration status code V: Valid registration. All codes
N9714L Beech
B19
Fixed-wing, single engine Webaire LLC
Slidell, Louisiana
Standard 2023-01-02 ValidFAA registration status code V: Valid registration. All codes
N112VV Darland Charles B
RV-9A
Fixed-wing, single engine Individual owner
California
Experimental 2022-12-31 ValidFAA registration status code V: Valid registration. All codes
N121MS Cessna
172N
Fixed-wing, single engine Darcy Aviation LLC
Danbury, Connecticut
Standard 2022-12-31 ValidFAA registration status code V: Valid registration. All codes
N1559P Piper
PA-18-135
Fixed-wing, single engine Snatchaday LLC
Carabaset Vly, Maine
Standard 2022-12-31 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.