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
N2778K Luscombe
8E
Fixed-wing, single engine Individual owner
Texas
Standard 2021-12-11 ValidFAA registration status code V: Valid registration. All codes
N4106X Aero Commander
100
Fixed-wing, single engine Individual owner
Washington
Standard 2021-12-11 ValidFAA registration status code V: Valid registration. All codes
N41TR Ashpaugh Harold L
RV-6
Fixed-wing, single engine Individual owner
Wisconsin
Experimental 2021-12-11 ValidFAA registration status code V: Valid registration. All codes
N4590F Piper
PA-28-151
Fixed-wing, single engine Individual owner
Pennsylvania
Standard 2021-12-11 ValidFAA registration status code V: Valid registration. All codes
N55200 Cessna
172P
Fixed-wing, single engine Skyhawk Flyer LLC
Monticello, Iowa
Standard 2021-12-11 ValidFAA registration status code V: Valid registration. All codes
N5627W Piper
PA-28-150
Fixed-wing, single engine Individual owner
Texas
Standard 2021-12-11 ValidFAA registration status code V: Valid registration. All codes
N600KK Kovac Joshua
VANS ACFT RV-6A
Fixed-wing, single engine Individual owner
Ohio
Experimental 2021-12-11 ValidFAA registration status code V: Valid registration. All codes
N6759B Piper
PA-22-150
Fixed-wing, single engine Individual owner
South Carolina
Standard 2021-12-11 ValidFAA registration status code V: Valid registration. All codes
N737RT Cessna
172N
Fixed-wing, single engine Feather Worx Aviation LLC
Bonita Springs, Florida
Standard 2021-12-11 ValidFAA registration status code V: Valid registration. All codes
N7781D Piper
PA-18A 150
Fixed-wing, single engine Individual owner
Alaska
Multiple 2021-12-11 ValidFAA registration status code V: Valid registration. All codes
N99TU Bostard Douglas E
VANS RV6A
Fixed-wing, single engine Individual owner
Virginia
Experimental 2021-12-11 ValidFAA registration status code V: Valid registration. All codes
N4156V Piper
PA-18-150
Fixed-wing, single engine Individual owner
Ohio
Standard 2021-12-10 ValidFAA registration status code V: Valid registration. All codes
N425SQ Piper
PA-23-160
Fixed-wing, multi-engine Individual owner
Florida
Standard 2021-12-10 ValidFAA registration status code V: Valid registration. All codes
N5600U Piper
PA-28-140
Fixed-wing, single engine Individual owner
Oklahoma
Standard 2021-12-10 ValidFAA registration status code V: Valid registration. All codes
N6659W Piper
PA-28-140
Fixed-wing, single engine Individual owner
California
Standard 2021-12-10 ValidFAA registration status code V: Valid registration. All codes
N7246C Piper
PA-28-151
Fixed-wing, single engine Valiair Limited CO Trustee
Casper, Wyoming
Standard 2021-12-10 ValidFAA registration status code V: Valid registration. All codes
N75057 Piper
PA-28-151
Fixed-wing, single engine Individual owner
North Carolina
Standard 2021-12-10 ValidFAA registration status code V: Valid registration. All codes
N922 Bellanca
7GCBC
Fixed-wing, single engine Tjk Enterprises LLC
Helena, Montana
Standard 2021-12-10 ValidFAA registration status code V: Valid registration. All codes
N5089R Cessna
172M
Fixed-wing, single engine High Wing Air Services LLC
Merritt Island, Florida
Standard 2021-12-09 ValidFAA registration status code V: Valid registration. All codes
N676CH Cessna
172M
Fixed-wing, single engine Take Off Aviation Services LLC
Rockledge, Florida
Standard 2021-12-09 ValidFAA registration status code V: Valid registration. All codes
N7303F Piper
PA-28-140
Fixed-wing, single engine Individual owner
Washington
Standard 2021-12-09 ValidFAA registration status code V: Valid registration. All codes
N733YB Cessna
172N
Fixed-wing, single engine Zulu Aerospace Services LLC
Peoria, Arizona
Standard 2021-12-09 ValidFAA registration status code V: Valid registration. All codes
N738MC Cessna
172N
Fixed-wing, single engine Co-owned owner
Kansas
Standard 2021-12-09 ValidFAA registration status code V: Valid registration. All codes
N8328U Robinson Helicopter
R22 BETA
Helicopter Individual owner
North Carolina
Standard 2021-12-09 ValidFAA registration status code V: Valid registration. All codes
N9849Q Cessna
172M
Fixed-wing, single engine Individual owner
New Hampshire
Standard 2021-12-09 ValidFAA registration status code V: Valid registration. All codes
N18WX Waxenfelter Jack G
THORP T-18
Fixed-wing, single engine Eastern Stearman INC Trustee
Leesburg, Virginia
Experimental 2021-12-08 ValidFAA registration status code V: Valid registration. All codes
N41434 Piper
PA-28-151
Fixed-wing, single engine Individual owner
Alabama
Standard 2021-12-08 ValidFAA registration status code V: Valid registration. All codes
N7409D Piper
PA-22-150
Fixed-wing, single engine Individual owner
Florida
Standard 2021-12-08 ValidFAA registration status code V: Valid registration. All codes
N813BD Schuh Rodney J
BD-18-217
Fixed-wing, single engine D & D Airpark LLC
Anchorage, Alaska
Experimental 2021-12-08 ValidFAA registration status code V: Valid registration. All codes
N5319S Piper
PA-28-140
Fixed-wing, single engine Individual owner
Florida
Standard 2021-12-07 ValidFAA registration status code V: Valid registration. All codes
N5766W Piper
PA-28-160
Fixed-wing, single engine Individual owner
Wisconsin
Standard 2021-12-07 ValidFAA registration status code V: Valid registration. All codes
N83689 Piper
PA-18-150
Fixed-wing, single engine Individual owner
Alaska
Standard 2021-12-07 ValidFAA registration status code V: Valid registration. All codes
N33439 Piper
PA-28-151
Fixed-wing, single engine Individual owner
Georgia
Standard 2021-12-06 ValidFAA registration status code V: Valid registration. All codes
N41290 Piper
PA-28-151
Fixed-wing, single engine Hilton Head Flyers LLC
Liberty, South Carolina
Standard 2021-12-06 ValidFAA registration status code V: Valid registration. All codes
N5447K Cessna
172P
Fixed-wing, single engine Fly for Fun LLC
Frederick, Maryland
Standard 2021-12-06 ValidFAA registration status code V: Valid registration. All codes
N22Y Universal
TEMCO D-16
Fixed-wing, multi-engine Individual owner
Kentucky
Standard 2021-12-04 ValidFAA registration status code V: Valid registration. All codes
N25552 Piper
PA-28-161
Fixed-wing, single engine Region Flyers LLC
Valparaiso, Indiana
Standard 2021-12-04 ValidFAA registration status code V: Valid registration. All codes
N56525 Piper
PA-28-140
Fixed-wing, single engine Individual owner
Texas
Standard 2021-12-04 ValidFAA registration status code V: Valid registration. All codes
N9400L Cessna
172P
Fixed-wing, single engine Individual owner
District of Columbia
Standard 2021-12-03 ValidFAA registration status code V: Valid registration. All codes
N4355A Piper
PA-22-150
Fixed-wing, single engine Burrows Aviation LLC
Deer Park, Washington
Standard 2021-12-02 ValidFAA registration status code V: Valid registration. All codes
N7021B Piper
PA-22-150
Fixed-wing, single engine Individual owner
Illinois
Standard 2021-12-02 ValidFAA registration status code V: Valid registration. All codes
N72NX Cessna
172N
Fixed-wing, single engine Nexair Avionics LLC
Plymouth, Massachusetts
Standard 2021-12-02 ValidFAA registration status code V: Valid registration. All codes
N633MT Cessna
172N
Fixed-wing, single engine Major Air LLC
Charleston, South Carolina
Standard 2021-12-01 ValidFAA registration status code V: Valid registration. All codes
N739HZ Cessna
172N
Fixed-wing, single engine Individual owner
California
Standard 2021-12-01 ValidFAA registration status code V: Valid registration. All codes
N78650 Cessna
172K
Fixed-wing, single engine Quad Cities Aero LLC
Bettendorf, Iowa
Standard 2021-12-01 ValidFAA registration status code V: Valid registration. All codes
N73813 Cessna
172N
Fixed-wing, single engine Individual owner
Kentucky
Standard 2021-11-30 ValidFAA registration status code V: Valid registration. All codes
N12819 Cessna
172M
Fixed-wing, single engine Co-owned owner
North Carolina
Standard 2021-11-29 ValidFAA registration status code V: Valid registration. All codes
N13796 Cessna
172M
Fixed-wing, single engine Positive Attitude Ia LLC
Gaithersburg, Maryland
Standard 2021-11-29 ValidFAA registration status code V: Valid registration. All codes
N1956W Beech
B19
Fixed-wing, single engine Individual owner
Idaho
Standard 2021-11-29 ValidFAA registration status code V: Valid registration. All codes
N20283 Cessna
172M
Fixed-wing, single engine Positive Attitude Ia Lc
Gaithersburg, Maryland
Standard 2021-11-29 ValidFAA registration status code V: Valid registration. All codes
N212CA Piper
PA-18-150
Fixed-wing, single engine Individual owner
Washington
Standard 2021-11-29 ValidFAA registration status code V: Valid registration. All codes
N36094 Piper
PA-28-161
Fixed-wing, single engine Jupiter Flight Service and Investing LLC
Lithonia, Georgia
Standard 2021-11-29 ValidFAA registration status code V: Valid registration. All codes
N4304J Piper
PA-28-140
Fixed-wing, single engine Co-owned owner
California
Standard 2021-11-29 ValidFAA registration status code V: Valid registration. All codes
N4618V Varga Aircraft Corp.
2150A
Fixed-wing, single engine Individual owner
Ohio
Standard 2021-11-29 ValidFAA registration status code V: Valid registration. All codes
N89LC Cook Louis G
RV 4
Fixed-wing, single engine Individual owner
Texas
Experimental 2021-11-29 ValidFAA registration status code V: Valid registration. All codes
N6339D Cessna
172N
Fixed-wing, single engine Contrails II INC
Kerrville, Texas
Standard 2021-11-27 ValidFAA registration status code V: Valid registration. All codes
N734LE Cessna
172N
Fixed-wing, single engine Co-owned owner
Utah
Standard 2021-11-27 ValidFAA registration status code V: Valid registration. All codes
N7285F Piper
PA-28-140
Fixed-wing, single engine Co-owned owner
Kansas
Standard 2021-11-26 ValidFAA registration status code V: Valid registration. All codes
N43707 Piper
PA-28-151
Fixed-wing, single engine Namah LLC
Gadsden, Alabama
Standard 2021-11-24 ValidFAA registration status code V: Valid registration. All codes
N4041E Piper
PA-18-150
Fixed-wing, single engine Individual owner
Alabama
Standard 2021-11-23 ValidFAA registration status code V: Valid registration. All codes
N9621V Cessna
172M
Fixed-wing, single engine Hathor Aviation LLC
Johnstown, Colorado
Standard 2021-11-23 ValidFAA registration status code V: Valid registration. All codes
N20289 Cessna
172M
Fixed-wing, single engine Whiskey 36 LLC
Norfolk, Virginia
Standard 2021-11-22 ValidFAA registration status code V: Valid registration. All codes
N13406 Cessna
172M
Fixed-wing, single engine Co-owned owner
North Carolina
Standard 2021-11-20 ValidFAA registration status code V: Valid registration. All codes
N3357K Globe
GC-1B
Fixed-wing, single engine Individual owner
Oregon
Standard 2021-11-20 ValidFAA registration status code V: Valid registration. All codes
N39WD Dodd William J
R AND D SPECIAL
Fixed-wing, single engine Individual owner
Oklahoma
Experimental 2021-11-20 ValidFAA registration status code V: Valid registration. All codes
N5057P Bellanca
7GCAA
Fixed-wing, single engine Individual owner
Florida
Standard 2021-11-20 ValidFAA registration status code V: Valid registration. All codes
N5705F Piper
PA-28-140
Fixed-wing, single engine Individual owner
Georgia
Standard 2021-11-20 ValidFAA registration status code V: Valid registration. All codes
N5971D Piper
PA-18-150
Fixed-wing, single engine Individual owner
Indiana
Standard 2021-11-20 ValidFAA registration status code V: Valid registration. All codes
N739DT Cessna
172N
Fixed-wing, single engine Wheelair INC
Fairfield, California
Standard 2021-11-20 ValidFAA registration status code V: Valid registration. All codes
N7481G Cessna
172K
Fixed-wing, single engine Individual owner
Ohio
Standard 2021-11-20 ValidFAA registration status code V: Valid registration. All codes
N1992H Piper
PA-28-161
Fixed-wing, single engine Bradley Aircraft Company LLC
Columbus, Indiana
Standard 2021-11-19 ValidFAA registration status code V: Valid registration. All codes
N417RT Thelen Roy J
VANS ACFT RV-8
Fixed-wing, single engine Individual owner
Michigan
Experimental 2021-11-19 ValidFAA registration status code V: Valid registration. All codes
N44579 Piper
PA-28-151
Fixed-wing, single engine Individual owner
Virginia
Standard 2021-11-19 ValidFAA registration status code V: Valid registration. All codes
N475K Grumman American Avn. Corp.
AA-5A
Fixed-wing, single engine Kmt Aviation LLC
Centerville, Ohio
Standard 2021-11-19 ValidFAA registration status code V: Valid registration. All codes
N5089G Cessna
172N
Fixed-wing, single engine Flywell Aviation LLC
Bowling Green, Kentucky
Standard 2021-11-19 ValidFAA registration status code V: Valid registration. All codes
N53DM Marks Donald P
RV 4
Fixed-wing, single engine Franklin Aviation LLC
Paradise, California
Experimental 2021-11-19 ValidFAA registration status code V: Valid registration. All codes
N6043L American
AA-5
Fixed-wing, single engine Vans Aero LLC
Newburgh, Indiana
Standard 2021-11-19 ValidFAA registration status code V: Valid registration. All codes
N6113W Piper
PA-28-140
Fixed-wing, single engine Co-owned owner
Arkansas
Standard 2021-11-19 ValidFAA registration status code V: Valid registration. All codes
N83310 Piper
PA-18-150
Fixed-wing, single engine Individual owner
Alaska
Standard 2021-11-19 ValidFAA registration status code V: Valid registration. All codes
N9848U Grumman American Avn. Corp.
AA-5A
Fixed-wing, single engine Individual owner
North Carolina
Standard 2021-11-19 ValidFAA registration status code V: Valid registration. All codes
N169FL Cessna
177
Fixed-wing, single engine Blue Moon Holding CO LLC
Boca Raton, Florida
Standard 2021-11-18 ValidFAA registration status code V: Valid registration. All codes
N455AD Darby Al
BD 4
Fixed-wing, single engine Co-owned owner
California
Experimental 2021-11-18 ValidFAA registration status code V: Valid registration. All codes
N7207J Piper
PA-28-140
Fixed-wing, single engine Erhardt Industries LLC
Ottumwa, Iowa
Standard 2021-11-18 ValidFAA registration status code V: Valid registration. All codes
N73585 Cessna
172M
Fixed-wing, single engine Individual owner
California
Standard 2021-11-18 ValidFAA registration status code V: Valid registration. All codes
N7365G Cessna
172K
Fixed-wing, single engine Pray Aviation INC
Augusta, Kansas
Standard 2021-11-18 ValidFAA registration status code V: Valid registration. All codes
N9575V Cessna
172M
Fixed-wing, single engine Individual owner
Florida
Standard 2021-11-18 ValidFAA registration status code V: Valid registration. All codes
N2331Z Beech
23
Fixed-wing, single engine Dovetail Aviation LLC
Saint George, Utah
Standard 2021-11-17 ValidFAA registration status code V: Valid registration. All codes
N269MA American Champion Aircraft
7GCBC
Fixed-wing, single engine Orange Wing Aviation INC
Wilmington, Delaware
Standard 2021-11-17 ValidFAA registration status code V: Valid registration. All codes
N54435 Piper
PA-28-140
Fixed-wing, single engine Bond Investigations Aviation LLC
Phoenix, Arizona
Standard 2021-11-17 ValidFAA registration status code V: Valid registration. All codes
N66P Cessna
172N
Fixed-wing, single engine Archangel One LLC
Lewes, Delaware
Standard 2021-11-17 ValidFAA registration status code V: Valid registration. All codes
N6989B Piper
PA-18A 150
Fixed-wing, single engine Individual owner
Washington
Standard 2021-11-17 ValidFAA registration status code V: Valid registration. All codes
N8420R Piper
PA-28-140
Fixed-wing, single engine Individual owner
Delaware
Standard 2021-11-17 ValidFAA registration status code V: Valid registration. All codes
N94142 Wilhelm Clayton D
RV-6A
Fixed-wing, single engine Co-owned owner
Montana
Experimental 2021-11-17 ValidFAA registration status code V: Valid registration. All codes
N100WR Robinson Helicopter
R22
Helicopter Individual owner
Washington
Standard 2021-11-16 ValidFAA registration status code V: Valid registration. All codes
N194AR Cessna
172N
Fixed-wing, single engine Individual owner
Georgia
Standard 2021-11-16 ValidFAA registration status code V: Valid registration. All codes
N362HZ Ray Beeninga
CB-1
Fixed-wing, single engine Co-owned owner
Oklahoma
Experimental 2021-11-16 ValidFAA registration status code V: Valid registration. All codes
N4107X Aero Commander
100
Fixed-wing, single engine Co-owned owner
California
Standard 2021-11-16 ValidFAA registration status code V: Valid registration. All codes
N4299Z Piper
PA-18-150
Fixed-wing, single engine Individual owner
Alaska
Restricted 2021-11-16 ValidFAA registration status code V: Valid registration. All codes
N55338 Piper
PA-28-140
Fixed-wing, single engine Pt Arts LLC
Grand Rapids, Michigan
Standard 2021-11-16 ValidFAA registration status code V: Valid registration. All codes
N98910 Piper
PA-12
Fixed-wing, single engine Individual owner
Alaska
Standard 2021-11-16 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.