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
N7028G Cessna
172K
Fixed-wing, single engine Co-owned owner
Nebraska
Standard 2020-03-19 ValidFAA registration status code V: Valid registration. All codes
N7288Q Cessna
172L
Fixed-wing, single engine Aerosmith Aviation LLC
Marietta, Georgia
Standard 2020-03-19 ValidFAA registration status code V: Valid registration. All codes
N75163 Piper
PA-28-151
Fixed-wing, single engine Individual owner
Missouri
Standard 2020-03-19 ValidFAA registration status code V: Valid registration. All codes
N2355E Cessna
172N
Fixed-wing, single engine Ace of Spades Aviation LLC
Las Vegas, Nevada
Standard 2020-03-18 ValidFAA registration status code V: Valid registration. All codes
N417RV Smith Dwight
VANS RV4
Fixed-wing, single engine Individual owner
Arkansas
Experimental 2020-03-18 ValidFAA registration status code V: Valid registration. All codes
N6123F Cessna
172N
Fixed-wing, single engine Jws Aviation LLC
Edina, Minnesota
Standard 2020-03-18 ValidFAA registration status code V: Valid registration. All codes
N13228 Cessna
172M
Fixed-wing, single engine Leader Aviation LLC
Glasgow, Montana
Standard 2020-03-17 ValidFAA registration status code V: Valid registration. All codes
N202JW White John
GLA STAR
Fixed-wing, single engine Individual owner
California
Experimental 2020-03-17 ValidFAA registration status code V: Valid registration. All codes
N2338Q Beech
23
Fixed-wing, single engine Co-owned owner
Minnesota
Standard 2020-03-17 ValidFAA registration status code V: Valid registration. All codes
N391DM American Champion Aircraft
7GCBC
Fixed-wing, single engine Individual owner
Minnesota
Standard 2020-03-17 ValidFAA registration status code V: Valid registration. All codes
N739HS Cessna
172N
Fixed-wing, single engine Orange County Flight Center INC
Santa Ana, California
Standard 2020-03-17 ValidFAA registration status code V: Valid registration. All codes
N777DV Stucker Virgil A
AVID MAGNUM
Fixed-wing, single engine Individual owner
Idaho
Experimental 2020-03-17 ValidFAA registration status code V: Valid registration. All codes
N9903V Cessna
172M
Fixed-wing, single engine Dwh Flight LLC
Spring, Texas
Standard 2020-03-17 ValidFAA registration status code V: Valid registration. All codes
N1814J Piper
PA-28-140
Fixed-wing, single engine Co-owned owner
Arizona
Standard 2020-03-16 ValidFAA registration status code V: Valid registration. All codes
N20097 Cessna
172M
Fixed-wing, single engine Individual owner
Michigan
Standard 2020-03-16 ValidFAA registration status code V: Valid registration. All codes
N2364P Piper
PA-18A 150
Fixed-wing, single engine Co-owned owner
Arizona
Standard 2020-03-16 ValidFAA registration status code V: Valid registration. All codes
N443RV Najarian Stephen N
VANS RV9A
Fixed-wing, single engine Individual owner
Washington
Experimental 2020-03-16 ValidFAA registration status code V: Valid registration. All codes
N44BL Cessna
172I
Fixed-wing, single engine Individual owner
Nebraska
Standard 2020-03-16 ValidFAA registration status code V: Valid registration. All codes
N4911F Piper
PA-28-140
Fixed-wing, single engine Individual owner
California
Standard 2020-03-16 ValidFAA registration status code V: Valid registration. All codes
N5433E Cessna
172N
Fixed-wing, single engine Aty Aviation INC
Watertown, South Dakota
Standard 2020-03-16 ValidFAA registration status code V: Valid registration. All codes
N6863W Piper
PA-28-140
Fixed-wing, single engine Thrust Vector LLC
Austin, Texas
Standard 2020-03-16 ValidFAA registration status code V: Valid registration. All codes
N783DG Cessna
172P
Fixed-wing, single engine Jeffery & Weiss Holdings LLC
Long Beach, California
Standard 2020-03-16 ValidFAA registration status code V: Valid registration. All codes
N6684W Piper
PA-28-140
Fixed-wing, single engine Individual owner
Washington
Standard 2020-03-13 ValidFAA registration status code V: Valid registration. All codes
N1370E Cessna
172N
Fixed-wing, single engine Sprocket Aircraft Management LLC
Kennesaw, Georgia
Standard 2020-03-12 ValidFAA registration status code V: Valid registration. All codes
N33DV Champion
7GCBC
Fixed-wing, single engine Individual owner
Wyoming
Standard 2020-03-12 ValidFAA registration status code V: Valid registration. All codes
N35FB Boyd
PITTS SPECIAL
Fixed-wing, single engine Ewins John H
Danville, California
Experimental 2020-03-12 ValidFAA registration status code V: Valid registration. All codes
N44655 Piper
PA-28-151
Fixed-wing, single engine Kingdom Air CORP
Sutton, Alaska
Standard 2020-03-12 ValidFAA registration status code V: Valid registration. All codes
N5740W Piper
PA-28-160
Fixed-wing, single engine Individual owner
Washington
Standard 2020-03-12 ValidFAA registration status code V: Valid registration. All codes
N8149R Piper
PA-28-161
Fixed-wing, single engine Republic Aviation CORP
Wilmington, Delaware
Standard 2020-03-12 ValidFAA registration status code V: Valid registration. All codes
N9171D Piper
PA-22-160
Fixed-wing, single engine Individual owner
Oregon
Standard 2020-03-12 ValidFAA registration status code V: Valid registration. All codes
N1517E Cessna
172N
Fixed-wing, single engine Heavy Metal Air LLC
Farmingdale, New York
Standard 2020-03-11 ValidFAA registration status code V: Valid registration. All codes
N1649P Piper
PA-22-150
Fixed-wing, single engine Sutton Aircraft Salvage LLC
Palmer, Alaska
Standard 2020-03-11 ValidFAA registration status code V: Valid registration. All codes
N1991W Beech
B19
Fixed-wing, single engine Gmm Records INC
Big Pine Key, Florida
Standard 2020-03-11 ValidFAA registration status code V: Valid registration. All codes
N211HP Cessna
172P
Fixed-wing, single engine N211Hp LLC
Lantana, Florida
Standard 2020-03-11 ValidFAA registration status code V: Valid registration. All codes
N2607Y Piper
PA-28-161
Fixed-wing, single engine Aero-Sphere INC
Longmont, Colorado
Standard 2020-03-11 ValidFAA registration status code V: Valid registration. All codes
N35675 Cessna
172I
Fixed-wing, single engine Scholand Gregory J
West Ossipee, New Hampshire
Standard 2020-03-11 ValidFAA registration status code V: Valid registration. All codes
N5653W Piper
PA-28-150
Fixed-wing, single engine Individual owner
New Jersey
Standard 2020-03-11 ValidFAA registration status code V: Valid registration. All codes
N737NJ Cessna
172N
Fixed-wing, single engine Sutton Aircraft Salvage LLC
Palmer, Alaska
Standard 2020-03-11 ValidFAA registration status code V: Valid registration. All codes
N739FU Cessna
172N
Fixed-wing, single engine 9Fu LLC
Anchorage, Alaska
Standard 2020-03-11 ValidFAA registration status code V: Valid registration. All codes
N7647G Cessna
172L
Fixed-wing, single engine Iowa Lakes Community College
Estherville, Iowa
Standard 2020-03-11 ValidFAA registration status code V: Valid registration. All codes
N84019 Cessna
172K
Fixed-wing, single engine Individual owner
Missouri
Standard 2020-03-11 ValidFAA registration status code V: Valid registration. All codes
N9641U Grumman American Avn. Corp.
AA-5A
Fixed-wing, single engine Individual owner
Connecticut
Standard 2020-03-11 ValidFAA registration status code V: Valid registration. All codes
N9734P Piper
PA-18-150
Fixed-wing, single engine Individual owner
Pennsylvania
Standard 2020-03-11 ValidFAA registration status code V: Valid registration. All codes
N4140Z Piper
PA-18-150
Fixed-wing, single engine Individual owner
Alaska
Standard 2020-03-10 ValidFAA registration status code V: Valid registration. All codes
N61786 Cessna
172M
Fixed-wing, single engine Northwest Wings LLC
Hillsboro, Oregon
Standard 2020-03-10 ValidFAA registration status code V: Valid registration. All codes
N7468D Piper
PA-18A 150
Fixed-wing, single engine Pine George D
Tok, Alaska
Standard 2020-03-10 ValidFAA registration status code V: Valid registration. All codes
N4549Y Piper
PA-18-150
Fixed-wing, single engine Individual owner
Nebraska
Standard 2020-03-09 ValidFAA registration status code V: Valid registration. All codes
N659FL Piper
PA-28-140
Fixed-wing, single engine Co-owned owner
Florida
Standard 2020-03-09 ValidFAA registration status code V: Valid registration. All codes
N73334 Cessna
172M
Fixed-wing, single engine Heavy Metal Air LLC
Farmingdale, New York
Standard 2020-03-09 ValidFAA registration status code V: Valid registration. All codes
N8354L Cessna
172I
Fixed-wing, single engine East Texas Imperial Petroleum LLC
Flint, Texas
Standard 2020-03-09 ValidFAA registration status code V: Valid registration. All codes
N12RZ Zapsky Richard M Jr
GLASTAR
Fixed-wing, single engine Individual owner
Pennsylvania
Experimental 2020-03-06 ValidFAA registration status code V: Valid registration. All codes
N21774 Cessna
172M
Fixed-wing, single engine Individual owner
New York
Standard 2020-03-06 ValidFAA registration status code V: Valid registration. All codes
N84645 Robinson Helicopter
R22
Helicopter In the Grey Aviation LLC
Seadrift, Texas
Standard 2020-03-06 ValidFAA registration status code V: Valid registration. All codes
N267CM Piper
PA-18-135
Fixed-wing, single engine Withheld at owner's request
Standard 2020-03-05 ValidFAA registration status code V: Valid registration. All codes
N4317G Piper
PA-28-161
Fixed-wing, single engine Individual owner
California
Standard 2020-03-05 ValidFAA registration status code V: Valid registration. All codes
N5993W Piper
PA-28-140
Fixed-wing, single engine Co-owned owner
Oklahoma
Standard 2020-03-05 ValidFAA registration status code V: Valid registration. All codes
N9980W Piper
PA-28-140
Fixed-wing, single engine All American Aviation Services INC
Fayetteville, North Carolina
Standard 2020-03-05 ValidFAA registration status code V: Valid registration. All codes
N11676 Bellanca
7GCAA
Fixed-wing, single engine Stone Air LLC
Carrollton, Georgia
Standard 2020-03-04 ValidFAA registration status code V: Valid registration. All codes
N1317E Cessna
172N
Fixed-wing, single engine Above and Beyond Aviation LLC
Austin, Texas
Standard 2020-03-04 ValidFAA registration status code V: Valid registration. All codes
N2145F American
AA-5
Fixed-wing, single engine Individual owner
Georgia
Standard 2020-03-04 ValidFAA registration status code V: Valid registration. All codes
N218RB Stecher Joseph E
RV-3
Fixed-wing, single engine Individual owner
Iowa
Experimental 2020-03-04 ValidFAA registration status code V: Valid registration. All codes
N2925X Cessna
177
Fixed-wing, single engine Individual owner
Texas
Standard 2020-03-04 ValidFAA registration status code V: Valid registration. All codes
N30151 Cessna
177
Fixed-wing, single engine Individual owner
Arkansas
Standard 2020-03-04 ValidFAA registration status code V: Valid registration. All codes
N4084Z Piper
PA-18-150
Fixed-wing, single engine Individual owner
Alaska
Restricted 2020-03-04 ValidFAA registration status code V: Valid registration. All codes
N4873A Piper
PA-18A 150
Fixed-wing, single engine Individual owner
New York
Standard 2020-03-04 ValidFAA registration status code V: Valid registration. All codes
N9511K Piper
PA-28-140
Fixed-wing, single engine Co-owned owner
Tennessee
Standard 2020-03-04 ValidFAA registration status code V: Valid registration. All codes
N4370J Piper
PA-28-140
Fixed-wing, single engine Individual owner
Ohio
Standard 2020-03-03 ValidFAA registration status code V: Valid registration. All codes
N6315W Piper
PA-28-140
Fixed-wing, single engine Air Share Aviators Flight Club LLC
Fairfax, California
Standard 2020-03-03 ValidFAA registration status code V: Valid registration. All codes
N85ZZ Glade Bernard W Jr
FALCO
Fixed-wing, single engine Speed Products LLC
Missoula, Montana
Experimental 2020-03-03 ValidFAA registration status code V: Valid registration. All codes
N3644P Piper
PA-22-150
Fixed-wing, single engine Individual owner
Vermont
Standard 2020-03-02 ValidFAA registration status code V: Valid registration. All codes
N618A Grumman American Avn. Corp.
AA-5A
Fixed-wing, single engine Individual owner
Indiana
Standard 2020-03-02 ValidFAA registration status code V: Valid registration. All codes
N738WY Cessna
172N
Fixed-wing, single engine Island Aircraft LLC
Anchorage, Alaska
Standard 2020-02-28 ValidFAA registration status code V: Valid registration. All codes
N739GG Cessna
172N
Fixed-wing, single engine Raptor Aviation LLC
South Saint Paul, Minnesota
Standard 2020-02-28 ValidFAA registration status code V: Valid registration. All codes
N196RA Alden Richard K
1996 GLASTAR
Fixed-wing, single engine Individual owner
Arizona
Experimental 2020-02-27 ValidFAA registration status code V: Valid registration. All codes
N734ME Cessna
172N
Fixed-wing, single engine Individual owner
Maine
Multiple 2020-02-27 ValidFAA registration status code V: Valid registration. All codes
N814MS Piper
PA-28-161
Fixed-wing, single engine Co-owned owner
Oregon
Standard 2020-02-27 ValidFAA registration status code V: Valid registration. All codes
N970PG American Champion Aircraft
7GCAA
Fixed-wing, single engine Joyful Flight LLC
Madison, Wisconsin
Standard 2020-02-27 ValidFAA registration status code V: Valid registration. All codes
N32421 Piper
PA-28-151
Fixed-wing, single engine Individual owner
Tennessee
Standard 2020-02-26 ValidFAA registration status code V: Valid registration. All codes
N35421 Cessna
172I
Fixed-wing, single engine Individual owner
South Carolina
Standard 2020-02-26 ValidFAA registration status code V: Valid registration. All codes
N47321 Piper
PA-28-161
Fixed-wing, single engine Griffith Aviation INC
Griffith, Indiana
Standard 2020-02-26 ValidFAA registration status code V: Valid registration. All codes
N5444F Piper
PA-28-140
Fixed-wing, single engine Anderson Aviation LLC
Bulverde, Texas
Standard 2020-02-26 ValidFAA registration status code V: Valid registration. All codes
N7567R Piper
PA-28-140
Fixed-wing, single engine Individual owner
Texas
Standard 2020-02-26 ValidFAA registration status code V: Valid registration. All codes
N9417L Cessna
172P
Fixed-wing, single engine Jalomc LLC
Glassport, Pennsylvania
Standard 2020-02-26 ValidFAA registration status code V: Valid registration. All codes
N100RF Beech
B19
Fixed-wing, single engine N100Rf Ghost LLC
Burleson, Texas
Standard 2020-02-25 ValidFAA registration status code V: Valid registration. All codes
N2031 Mong Sport
MS-2
Fixed-wing, single engine Individual owner
Florida
Experimental 2020-02-25 ValidFAA registration status code V: Valid registration. All codes
N20047 Cessna
172M
Fixed-wing, single engine Flying Broke Acres LLC
Lexington, Nebraska
Standard 2020-02-24 ValidFAA registration status code V: Valid registration. All codes
N287P Piper
PA-28-140
Fixed-wing, single engine N8297N LLC
Evansville, Indiana
Standard 2020-02-24 ValidFAA registration status code V: Valid registration. All codes
N4375Z Piper
PA-18-150
Fixed-wing, single engine Rwr Air INC
Tok, Alaska
Multiple 2020-02-24 ValidFAA registration status code V: Valid registration. All codes
N51627 Piper
PA-18-150
Fixed-wing, single engine Individual owner
Alabama
Standard 2020-02-24 ValidFAA registration status code V: Valid registration. All codes
N6501C Piper
PA-28-161
Fixed-wing, single engine Co-owned owner
Oklahoma
Standard 2020-02-24 ValidFAA registration status code V: Valid registration. All codes
N739HK Cessna
172N
Fixed-wing, single engine Southwest Aeronautics Mathematics & Science Acad
Albuquerque, New Mexico
Standard 2020-02-24 ValidFAA registration status code V: Valid registration. All codes
N883TC Coughlin Brian T
FOKKER DR-1
Fixed-wing, single engine Individual owner
New York
Experimental 2020-02-24 ValidFAA registration status code V: Valid registration. All codes
N9814P Piper
PA-18-150
Fixed-wing, single engine Individual owner
Montana
Multiple 2020-02-24 ValidFAA registration status code V: Valid registration. All codes
N32056 Piper
PA-28-151
Fixed-wing, single engine Co-owned owner
California
Standard 2020-02-21 ValidFAA registration status code V: Valid registration. All codes
N5276W Piper
PA-28
Fixed-wing, single engine Third Step 2 LLC
Wilmington, Delaware
Standard 2020-02-21 ValidFAA registration status code V: Valid registration. All codes
N79929 Cessna
172K
Fixed-wing, single engine S & C Aero LLC
Collierville, Tennessee
Standard 2020-02-21 ValidFAA registration status code V: Valid registration. All codes
N21199 Cessna
172M
Fixed-wing, single engine Co-owned owner
Massachusetts
Standard 2020-02-20 ValidFAA registration status code V: Valid registration. All codes
N3282T Cessna
177
Fixed-wing, single engine Cavu Aircraft Sales & Management INC
Olyphant, Pennsylvania
Standard 2020-02-20 ValidFAA registration status code V: Valid registration. All codes
N345AE Grumman American Avn. Corp.
AA-5A
Fixed-wing, single engine Channel City Flyers INC
Santa Barbara, California
Standard 2020-02-20 ValidFAA registration status code V: Valid registration. All codes
N4488Z Piper
PA-18-150
Fixed-wing, single engine Alaska Tailwheel LLC
Fairbanks, Alaska
Standard 2020-02-20 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.