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
N255LL Adams Abner M
AVID MAGNUM
Fixed-wing, single engine Individual owner
North Carolina
Experimental 2017-04-24 ValidFAA registration status code V: Valid registration. All codes
N539JJ Bellanca
7GCBC
Fixed-wing, single engine Individual owner
California
Standard 2017-04-24 ValidFAA registration status code V: Valid registration. All codes
N6186W Piper
PA-28-140
Fixed-wing, single engine Co-owned owner
New Hampshire
Standard 2017-04-24 ValidFAA registration status code V: Valid registration. All codes
N738VL Cessna
172N
Fixed-wing, single engine Individual owner
Missouri
Standard 2017-04-24 ValidFAA registration status code V: Valid registration. All codes
N8060D Piper
PA-22-150
Fixed-wing, single engine Individual owner
Ohio
Standard 2017-04-24 ValidFAA registration status code V: Valid registration. All codes
N2997Z Piper
PA-18-150
Fixed-wing, single engine Individual owner
Alaska
Multiple 2017-04-21 ValidFAA registration status code V: Valid registration. All codes
N430TL Duffy Thomas J
LONG EZ
Fixed-wing, single engine Individual owner
California
None on file 2017-04-21 ValidFAA registration status code V: Valid registration. All codes
N46518 Cessna
172K
Fixed-wing, single engine Adventist World Aviation
Wilson, North Carolina
Standard 2017-04-21 ValidFAA registration status code V: Valid registration. All codes
N5100E Cessna
172N
Fixed-wing, single engine Individual owner
Kansas
Standard 2017-04-21 ValidFAA registration status code V: Valid registration. All codes
N737LP Cessna
172N
Fixed-wing, single engine Co-owned owner
California
Standard 2017-04-21 ValidFAA registration status code V: Valid registration. All codes
N86571 Bellanca
7GCBC
Fixed-wing, single engine Individual owner
Alaska
Standard 2017-04-21 ValidFAA registration status code V: Valid registration. All codes
N6348N Champion
7GCAA
Fixed-wing, single engine Nelson Spraying Service INC
Chester, Montana
Standard 2017-04-20 ValidFAA registration status code V: Valid registration. All codes
N739XU Cessna
172N
Fixed-wing, single engine Training Mission Aviation INC
New Tripoli, Pennsylvania
Standard 2017-04-20 ValidFAA registration status code V: Valid registration. All codes
N9128F Piper
PA-18-150
Fixed-wing, single engine Individual owner
Washington
Standard 2017-04-20 ValidFAA registration status code V: Valid registration. All codes
N118WW Varga Aircraft Corp.
2150A
Fixed-wing, single engine Individual owner
South Carolina
Standard 2017-04-18 ValidFAA registration status code V: Valid registration. All codes
N44081 Piper
PA-28-151
Fixed-wing, single engine Plm Enterprises LLC
Mount Washington, Kentucky
Standard 2017-04-18 ValidFAA registration status code V: Valid registration. All codes
N651EC Cessna
177
Fixed-wing, single engine Eagle Sky Patrol INC
Deadwood, South Dakota
Special flight permit 2017-04-18 ValidFAA registration status code V: Valid registration. All codes
N7180R Piper
PA-28-140
Fixed-wing, single engine Individual owner
South Dakota
Standard 2017-04-18 ValidFAA registration status code V: Valid registration. All codes
N9993D Piper
PA-22-160
Fixed-wing, single engine Munson Matthew C
Canby, Oregon
Standard 2017-04-18 ValidFAA registration status code V: Valid registration. All codes
N304RA S.O.C.A.T.A.
RALLYE 150 ST
Fixed-wing, single engine Individual owner
North Carolina
Standard 2017-04-17 ValidFAA registration status code V: Valid registration. All codes
N571DM American Champion Aircraft
7GCAA
Fixed-wing, single engine Co-owned owner
Maine
Standard 2017-04-17 ValidFAA registration status code V: Valid registration. All codes
N854HC Oglesby H C Jr
GLASTAR
Fixed-wing, single engine N854Hc LLC
Watkinsville, Georgia
Experimental 2017-04-17 ValidFAA registration status code V: Valid registration. All codes
N9959U Grumman American Avn. Corp.
AA-5A
Fixed-wing, single engine Co-owned owner
Georgia
Standard 2017-04-17 ValidFAA registration status code V: Valid registration. All codes
N186FM Cessna
172N
Fixed-wing, single engine Jett Aviation LLC
Clovis, New Mexico
Standard 2017-04-14 ValidFAA registration status code V: Valid registration. All codes
N1935L Beech
B19
Fixed-wing, single engine Blais Aviation Services LLC
Frisco, Texas
Standard 2017-04-14 ValidFAA registration status code V: Valid registration. All codes
N3845Q Cessna
172L
Fixed-wing, single engine Macon Flying Club INC
Macon, Missouri
Standard 2017-04-14 ValidFAA registration status code V: Valid registration. All codes
N4473R Cessna
172M
Fixed-wing, single engine Individual owner
West Virginia
Standard 2017-04-13 ValidFAA registration status code V: Valid registration. All codes
N5401W Piper
PA-28-160
Fixed-wing, single engine Individual owner
Wisconsin
Standard 2017-04-13 ValidFAA registration status code V: Valid registration. All codes
N733EV Cessna
172N
Fixed-wing, single engine Individual owner
New York
Standard 2017-04-13 ValidFAA registration status code V: Valid registration. All codes
N9544L Grumman American Avn. Corp.
AA-5
Fixed-wing, single engine Fortnight Aviation LLC
Philadelphia, Pennsylvania
Standard 2017-04-13 ValidFAA registration status code V: Valid registration. All codes
N1036Q Piper
PA-28-161
Fixed-wing, single engine Individual owner
Massachusetts
Standard 2017-04-12 ValidFAA registration status code V: Valid registration. All codes
N150CJ P Z L Koliber
150A
Fixed-wing, single engine Individual owner
Tennessee
Standard 2017-04-12 ValidFAA registration status code V: Valid registration. All codes
N15701 Piper
PA-28-140
Fixed-wing, single engine Individual owner
Kansas
Standard 2017-04-12 ValidFAA registration status code V: Valid registration. All codes
N488JW Cessna
172M
Fixed-wing, single engine Co-owned owner
Texas
Standard 2017-04-12 ValidFAA registration status code V: Valid registration. All codes
N5259R Cessna
172M
Fixed-wing, single engine Individual owner
California
Standard 2017-04-12 ValidFAA registration status code V: Valid registration. All codes
N5980Z Piper
PA-18-150
Fixed-wing, single engine Oyster Flite Investments INC
Wilmington, Delaware
Standard 2017-04-12 ValidFAA registration status code V: Valid registration. All codes
N6578R Beech
B19
Fixed-wing, single engine Co-owned owner
California
Standard 2017-04-12 ValidFAA registration status code V: Valid registration. All codes
N73068 Cessna
172M
Fixed-wing, single engine Individual owner
Nebraska
Standard 2017-04-12 ValidFAA registration status code V: Valid registration. All codes
N73391 Cessna
172M
Fixed-wing, single engine Individual owner
Florida
Standard 2017-04-12 ValidFAA registration status code V: Valid registration. All codes
N7553E Cessna
172N
Fixed-wing, single engine Co-owned owner
California
Standard 2017-04-12 ValidFAA registration status code V: Valid registration. All codes
N9502H Cessna
172M
Fixed-wing, single engine Individual owner
Alaska
Standard 2017-04-12 ValidFAA registration status code V: Valid registration. All codes
N100KC Cornum Kurt K
100 STOL
Fixed-wing, single engine Co-owned owner
Oregon
Experimental 2017-04-11 ValidFAA registration status code V: Valid registration. All codes
N191WW Cessna
172M
Fixed-wing, single engine Individual owner
Minnesota
Standard 2017-04-11 ValidFAA registration status code V: Valid registration. All codes
N3082E Cessna
172N
Fixed-wing, single engine Airgo INC
Centralia, Illinois
Standard 2017-04-11 ValidFAA registration status code V: Valid registration. All codes
N56750 Piper
PA-28-140
Fixed-wing, single engine Individual owner
Minnesota
Standard 2017-04-11 ValidFAA registration status code V: Valid registration. All codes
N6329R Piper
PA-28-140
Fixed-wing, single engine Individual owner
Washington
Standard 2017-04-11 ValidFAA registration status code V: Valid registration. All codes
N982SK Cessna
172M
Fixed-wing, single engine Individual owner
Maine
Restricted 2017-04-11 ValidFAA registration status code V: Valid registration. All codes
N55126 Cessna
172P
Fixed-wing, single engine Zing Aviation and Marine LLC
New Smyrna Beach, Florida
Standard 2017-04-10 ValidFAA registration status code V: Valid registration. All codes
N612LC Piper
PA-28-140
Fixed-wing, single engine Individual owner
Texas
Standard 2017-04-10 ValidFAA registration status code V: Valid registration. All codes
N64108 Cessna
172M
Fixed-wing, single engine Co-owned owner
Illinois
Standard 2017-04-10 ValidFAA registration status code V: Valid registration. All codes
N6936W Piper
PA-28-140
Fixed-wing, single engine Individual owner
Minnesota
Standard 2017-04-10 ValidFAA registration status code V: Valid registration. All codes
N696R Cessna
172M
Fixed-wing, single engine Individual owner
Puerto Rico
Standard 2017-04-10 ValidFAA registration status code V: Valid registration. All codes
N70TA Cessna
172N
Fixed-wing, single engine Sixty Three Charlie Zulu INC
Thonotosassa, Florida
Standard 2017-04-10 ValidFAA registration status code V: Valid registration. All codes
N7356G Cessna
172K
Fixed-wing, single engine Individual owner
Arkansas
Standard 2017-04-10 ValidFAA registration status code V: Valid registration. All codes
N8274N Piper
PA-28-140
Fixed-wing, single engine Jln Aviation Services LLC
Avon, Indiana
Standard 2017-04-10 ValidFAA registration status code V: Valid registration. All codes
N1046X Piper
PA-28-140
Fixed-wing, single engine Farnham Aviation Services LLC
Ames, Iowa
Standard 2017-04-07 ValidFAA registration status code V: Valid registration. All codes
N9686P Piper
PA-18-150
Fixed-wing, single engine T-6 Warbird LLC
Tulsa, Oklahoma
Restricted 2017-04-07 ValidFAA registration status code V: Valid registration. All codes
N999SN Nelson Syd
RV6
Fixed-wing, single engine Individual owner
Alaska
Experimental 2017-04-07 ValidFAA registration status code V: Valid registration. All codes
N2986Z Piper
PA-18A
Fixed-wing, single engine Individual owner
Texas
Standard 2017-04-06 ValidFAA registration status code V: Valid registration. All codes
N967JR Cessna
172M
Fixed-wing, single engine Individual owner
Georgia
Standard 2017-04-06 ValidFAA registration status code V: Valid registration. All codes
N4940E Cessna
172N
Fixed-wing, single engine Flyright Aviation INC
North Las Vegas, Nevada
Standard 2017-04-05 ValidFAA registration status code V: Valid registration. All codes
N9988V Cessna
172M
Fixed-wing, single engine Lenoir Aviation Club INC
Lenoir, North Carolina
Standard 2017-04-05 ValidFAA registration status code V: Valid registration. All codes
N222U Piper
PA-23
Fixed-wing, multi-engine Individual owner
Maine
Standard 2017-04-04 ValidFAA registration status code V: Valid registration. All codes
N4307A Piper
PA-22-150
Fixed-wing, single engine Individual owner
Texas
Standard 2017-04-03 ValidFAA registration status code V: Valid registration. All codes
N79306 Cessna
172K
Fixed-wing, single engine La Partnership
Billings, Montana
Standard 2017-04-03 ValidFAA registration status code V: Valid registration. All codes
N82665 Piper
PA-18-150
Fixed-wing, single engine Schiestle Jason T
Greenville, Pennsylvania
Standard 2017-04-03 ValidFAA registration status code V: Valid registration. All codes
N24645 Beech
B19
Fixed-wing, single engine Co-owned owner
Washington
Standard 2017-03-31 ValidFAA registration status code V: Valid registration. All codes
N9680Q Cessna
172M
Fixed-wing, single engine Aircraft Guaranty CORP Trustee
Oklahoma City, Oklahoma
Standard 2017-03-31 ValidFAA registration status code V: Valid registration. All codes
N53201 Cessna
172P
Fixed-wing, single engine Individual owner
Washington
Standard 2017-03-30 ValidFAA registration status code V: Valid registration. All codes
N80870 Cessna
172M
Fixed-wing, single engine Individual owner
Texas
Standard 2017-03-30 ValidFAA registration status code V: Valid registration. All codes
N8334P Piper
PA-28-161
Fixed-wing, single engine Individual owner
California
Standard 2017-03-30 ValidFAA registration status code V: Valid registration. All codes
N9281K Piper
PA-28-151
Fixed-wing, single engine Bartels Aviation LLC
Merritt Island, Florida
Standard 2017-03-30 ValidFAA registration status code V: Valid registration. All codes
N19680 Cessna
172L
Fixed-wing, single engine Proflight Services LLC
West Newton, Pennsylvania
Standard 2017-03-28 ValidFAA registration status code V: Valid registration. All codes
N2204D Piper
PA-28-161
Fixed-wing, single engine Individual owner
Oregon
Standard 2017-03-28 ValidFAA registration status code V: Valid registration. All codes
N3508P Piper
PA-22-150
Fixed-wing, single engine Co-owned owner
Kansas
Standard 2017-03-28 ValidFAA registration status code V: Valid registration. All codes
N410MV Omf
OMF-100-160
Fixed-wing, single engine Individual owner
Washington
Standard 2017-03-28 ValidFAA registration status code V: Valid registration. All codes
N55738 Piper
PA-28-140
Fixed-wing, single engine Individual owner
Kansas
Standard 2017-03-28 ValidFAA registration status code V: Valid registration. All codes
N9059Q Robinson Helicopter
R22
Helicopter Individual owner
Georgia
Standard 2017-03-28 ValidFAA registration status code V: Valid registration. All codes
N9713W Piper
PA-28-140
Fixed-wing, single engine Individual owner
South Carolina
Standard 2017-03-28 ValidFAA registration status code V: Valid registration. All codes
N18338 Piper
PA-18-150
Fixed-wing, single engine Individual owner
Alaska
Standard 2017-03-27 ValidFAA registration status code V: Valid registration. All codes
N56679 Piper
PA-28-151
Fixed-wing, single engine Individual owner
New York
Standard 2017-03-27 ValidFAA registration status code V: Valid registration. All codes
N9646D Piper
PA-22-160
Fixed-wing, single engine Individual owner
Ohio
Standard 2017-03-27 ValidFAA registration status code V: Valid registration. All codes
N2261Y Cessna
177
Fixed-wing, single engine Co-owned owner
California
Standard 2017-03-23 ValidFAA registration status code V: Valid registration. All codes
N23PW Haehn John D
RV-4
Fixed-wing, single engine Individual owner
Colorado
Experimental 2017-03-23 ValidFAA registration status code V: Valid registration. All codes
N3845Z Piper
PA-18-150
Fixed-wing, single engine Individual owner
Nebraska
Multiple 2017-03-23 ValidFAA registration status code V: Valid registration. All codes
N4432Z Piper
PA-18-150
Fixed-wing, single engine Individual owner
South Dakota
Multiple 2017-03-23 ValidFAA registration status code V: Valid registration. All codes
N5757E Cessna
172N
Fixed-wing, single engine Flex Air INC
San Diego, California
Standard 2017-03-23 ValidFAA registration status code V: Valid registration. All codes
N6414R Piper
PA-28-140
Fixed-wing, single engine Co-owned owner
Alaska
Standard 2017-03-23 ValidFAA registration status code V: Valid registration. All codes
N7070G Cessna
172K
Fixed-wing, single engine Individual owner
Vermont
Standard 2017-03-23 ValidFAA registration status code V: Valid registration. All codes
N739XM Cessna
172N
Fixed-wing, single engine Co-owned owner
Washington
Standard 2017-03-23 ValidFAA registration status code V: Valid registration. All codes
N92159 Cessna
172M
Fixed-wing, single engine Buster Aviation LLC
Harveys Lake, Pennsylvania
Standard 2017-03-23 ValidFAA registration status code V: Valid registration. All codes
N90995 Piper
PA-18-150
Fixed-wing, single engine Peregrine Air LLC
Colorado Springs, Colorado
Standard 2017-03-22 ValidFAA registration status code V: Valid registration. All codes
N416RP Piper
PA-28-151
Fixed-wing, single engine Miller Aircraft Services INC
Crookston, Minnesota
Standard 2017-03-21 ValidFAA registration status code V: Valid registration. All codes
N220NY Cessna
172M
Fixed-wing, single engine Ca Aviation 172 LLC
Santa Barbara, California
Standard 2017-03-20 ValidFAA registration status code V: Valid registration. All codes
N3785X Aero Commander
100
Fixed-wing, single engine Individual owner
Texas
Standard 2017-03-20 ValidFAA registration status code V: Valid registration. All codes
N989CW Cessna
172M
Fixed-wing, single engine Cardinal Wings Aviation LLC
Buckner, Kentucky
Standard 2017-03-20 ValidFAA registration status code V: Valid registration. All codes
N44637 Piper
PA-28-151
Fixed-wing, single engine Able Construction INC
Jacksonville, Florida
Standard 2017-03-17 ValidFAA registration status code V: Valid registration. All codes
N5038G Bellanca
7GCAA
Fixed-wing, single engine Co-owned owner
California
Standard 2017-03-17 ValidFAA registration status code V: Valid registration. All codes
N80246 Cessna
172M
Fixed-wing, single engine Lincoln Skyways INC
Lincoln, California
Standard 2017-03-17 ValidFAA registration status code V: Valid registration. All codes
N187FT Piper
PA-28-161
Fixed-wing, single engine Individual owner
Florida
Standard 2017-03-16 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.