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
N3593F Cessna
172L
Fixed-wing, single engine Individual owner
Pennsylvania
Standard 2016-01-04 ValidFAA registration status code V: Valid registration. All codes
N514FL Piper
PA-28-140
Fixed-wing, single engine Individual owner
Rhode Island
Standard 2016-01-04 ValidFAA registration status code V: Valid registration. All codes
N68RL Gulfstream American Corp
AA-5A
Fixed-wing, single engine Individual owner
Tennessee
Standard 2016-01-04 ValidFAA registration status code V: Valid registration. All codes
N7230G Cessna
172K
Fixed-wing, single engine Individual owner
Colorado
Standard 2016-01-04 ValidFAA registration status code V: Valid registration. All codes
N7926G Cessna
172L
Fixed-wing, single engine Spencer Aviation INC
Delaware, Ohio
Standard 2016-01-04 ValidFAA registration status code V: Valid registration. All codes
N842SV Robinson Helicopter
R22
Helicopter Rancho Sierra Vista de Sasabe LLC
Sasabe, Arizona
Standard 2016-01-04 ValidFAA registration status code V: Valid registration. All codes
N45CD Piper
PA-28-161
Fixed-wing, single engine Hillair INC Trustee
Wilmington, Delaware
Standard 2015-12-31 ValidFAA registration status code V: Valid registration. All codes
N7464L Piper
PA-18-150
Fixed-wing, single engine North Wind Air Service LLC
Seattle, Washington
Standard 2015-12-30 ValidFAA registration status code V: Valid registration. All codes
N1333R Grumman American Avn. Corp.
AA-5
Fixed-wing, single engine Individual owner
Georgia
Standard 2015-12-29 ValidFAA registration status code V: Valid registration. All codes
N4372S Piper
PA-28-161
Fixed-wing, single engine Individual owner
Ohio
Standard 2015-12-29 ValidFAA registration status code V: Valid registration. All codes
N7432G Cessna
172K
Fixed-wing, single engine Nichols Roy D
Cadillac, Michigan
Standard 2015-12-29 ValidFAA registration status code V: Valid registration. All codes
N94HF Bellanca
7GCBC
Fixed-wing, single engine Individual owner
Illinois
Standard 2015-12-29 ValidFAA registration status code V: Valid registration. All codes
N303T Piper
PA-18-105 SPECIAL
Fixed-wing, single engine Withheld at owner's request
Multiple 2015-12-28 ValidFAA registration status code V: Valid registration. All codes
N46675 Cessna
172M
Fixed-wing, single engine Co-owned owner
South Dakota
Standard 2015-12-28 ValidFAA registration status code V: Valid registration. All codes
N73938 Cessna
172N
Fixed-wing, single engine Co-owned owner
New Mexico
Standard 2015-12-24 ValidFAA registration status code V: Valid registration. All codes
N75NS Cessna
172K
Fixed-wing, single engine Individual owner
North Dakota
Multiple 2015-12-24 ValidFAA registration status code V: Valid registration. All codes
N172DA Cessna
172P
Fixed-wing, single engine Duncan Aviation
Lincoln, Nebraska
Standard 2015-12-23 ValidFAA registration status code V: Valid registration. All codes
N21030 Piper
PA-28-161
Fixed-wing, single engine Aircraft Management Group INC
Honolulu, Hawaii
Standard 2015-12-22 ValidFAA registration status code V: Valid registration. All codes
N2547Q Piper
PA-28-140
Fixed-wing, single engine Individual owner
Tennessee
Standard 2015-12-22 ValidFAA registration status code V: Valid registration. All codes
N46703 Cessna
172K
Fixed-wing, single engine Co-owned owner
Oregon
Standard 2015-12-22 ValidFAA registration status code V: Valid registration. All codes
N9596U Grumman American Avn. Corp.
AA-5A
Fixed-wing, single engine Individual owner
Indiana
Standard 2015-12-22 ValidFAA registration status code V: Valid registration. All codes
N7295J Piper
PA-28-140
Fixed-wing, single engine Individual owner
Texas
Standard 2015-12-21 ValidFAA registration status code V: Valid registration. All codes
N12098 Cessna
172M
Fixed-wing, single engine Individual owner
South Carolina
Standard 2015-12-19 ValidFAA registration status code V: Valid registration. All codes
N1496P Piper
PA-23-150
Fixed-wing, multi-engine Individual owner
Arizona
Standard 2015-12-19 ValidFAA registration status code V: Valid registration. All codes
N1639J Piper
PA-28-140
Fixed-wing, single engine All American Aviation Services INC
Fayetteville, North Carolina
Standard 2015-12-19 ValidFAA registration status code V: Valid registration. All codes
N21GJ Jasper Gary H
VANS RV-6
Fixed-wing, single engine Individual owner
Pennsylvania
Experimental 2015-12-19 ValidFAA registration status code V: Valid registration. All codes
N3038Z Piper
PA-22-160
Fixed-wing, single engine Individual owner
Oklahoma
Standard 2015-12-19 ValidFAA registration status code V: Valid registration. All codes
N3601E Cessna
172N
Fixed-wing, single engine Lsn Air LLC
Morrison, Colorado
Standard 2015-12-19 ValidFAA registration status code V: Valid registration. All codes
N6808B Piper
PA-22-150
Fixed-wing, single engine Individual owner
Maryland
Standard 2015-12-19 ValidFAA registration status code V: Valid registration. All codes
N7164L Grumman American Avn. Corp.
AA-5
Fixed-wing, single engine Individual owner
Wisconsin
Standard 2015-12-19 ValidFAA registration status code V: Valid registration. All codes
N7217F Piper
PA-28-140
Fixed-wing, single engine Individual owner
Missouri
Standard 2015-12-19 ValidFAA registration status code V: Valid registration. All codes
N8166D Piper
PA-18A 150
Fixed-wing, single engine Individual owner
Alaska
Restricted 2015-12-19 ValidFAA registration status code V: Valid registration. All codes
N8560M Robinson Helicopter
R22
Helicopter N8560M LLC
Rehoboth Beach, Delaware
Standard 2015-12-19 ValidFAA registration status code V: Valid registration. All codes
N737CP Cessna
172N
Fixed-wing, single engine Flight Exams INC
Deland, Florida
Standard 2015-12-17 ValidFAA registration status code V: Valid registration. All codes
N15533 Piper
PA-28-140
Fixed-wing, single engine Standard Day Aviation LLC
Garland, Texas
Standard 2015-12-15 ValidFAA registration status code V: Valid registration. All codes
N2681Z Bellanca
7GCBC
Fixed-wing, single engine Individual owner
Minnesota
Standard 2015-12-15 ValidFAA registration status code V: Valid registration. All codes
N9367H Cessna
172M
Fixed-wing, single engine Deralex Airways LLC
Miami, Florida
Standard 2015-12-15 ValidFAA registration status code V: Valid registration. All codes
N1FD Socata
TB200
Fixed-wing, single engine Siek Aviation INC Trustee
Wilmington, Delaware
Standard 2015-12-14 ValidFAA registration status code V: Valid registration. All codes
N318AC American Champion Aircraft
7GCBC
Fixed-wing, single engine Individual owner
South Dakota
Standard 2015-12-14 ValidFAA registration status code V: Valid registration. All codes
N2423 Champion
7GCB
Fixed-wing, single engine Individual owner
Montana
Multiple 2015-12-12 ValidFAA registration status code V: Valid registration. All codes
N4788E Cessna
172N
Fixed-wing, single engine Individual owner
New York
Standard 2015-12-12 ValidFAA registration status code V: Valid registration. All codes
N5220R Cessna
172M
Fixed-wing, single engine Chaz L Enterprises LLC
Ringwood, New Jersey
Standard 2015-12-12 ValidFAA registration status code V: Valid registration. All codes
N6160J Piper
PA-28-151
Fixed-wing, single engine Co-owned owner
Missouri
Standard 2015-12-12 ValidFAA registration status code V: Valid registration. All codes
N90249 Robinson Helicopter
R22
Helicopter Helicopteracademy.Com LLC
Rehoboth Beach, Delaware
Experimental 2015-12-12 ValidFAA registration status code V: Valid registration. All codes
N13814 Piper
PA-18-150
Fixed-wing, single engine Individual owner
Florida
Standard 2015-12-11 ValidFAA registration status code V: Valid registration. All codes
N3169Z Piper
PA-22-150
Fixed-wing, single engine Individual owner
Ohio
Standard 2015-12-11 ValidFAA registration status code V: Valid registration. All codes
N5078B Eiden Richard F
RV-4
Fixed-wing, single engine Co-owned owner
Washington
Experimental 2015-12-11 ValidFAA registration status code V: Valid registration. All codes
N2959Q Piper
PA-28-161
Fixed-wing, single engine Paris Air INC
Vero Beach, Florida
Standard 2015-12-10 ValidFAA registration status code V: Valid registration. All codes
N7944H Piper
PA-12
Fixed-wing, single engine Individual owner
Alaska
Standard 2015-12-10 ValidFAA registration status code V: Valid registration. All codes
N98218 Piper
PA-28-140
Fixed-wing, single engine Individual owner
Oklahoma
Standard 2015-12-10 ValidFAA registration status code V: Valid registration. All codes
N56RW Wade
KING MINI
Fixed-wing, single engine Individual owner
Nevada
Experimental 2015-12-09 ValidFAA registration status code V: Valid registration. All codes
N6644Z Piper
PA-18
Fixed-wing, single engine Individual owner
Alaska
Experimental 2015-12-09 ValidFAA registration status code V: Valid registration. All codes
N46163 Cessna
172I
Fixed-wing, single engine Individual owner
Pennsylvania
Standard 2015-12-08 ValidFAA registration status code V: Valid registration. All codes
N32478 Piper
PA-28-151
Fixed-wing, single engine Sidney Aviation LLC
Sidney, Nebraska
Standard 2015-12-07 ValidFAA registration status code V: Valid registration. All codes
N9839W Piper
PA-28-140
Fixed-wing, single engine Individual owner
Michigan
Standard 2015-12-07 ValidFAA registration status code V: Valid registration. All codes
N98MS Piper
PA-28-151
Fixed-wing, single engine Individual owner
Missouri
Standard 2015-12-07 ValidFAA registration status code V: Valid registration. All codes
N2829Q Cessna
172L
Fixed-wing, single engine L & L Aviation LLC
Sidney, Nebraska
Standard 2015-12-05 ValidFAA registration status code V: Valid registration. All codes
N2992P Piper
PA-18-150
Fixed-wing, single engine Individual owner
Alaska
Standard 2015-12-05 ValidFAA registration status code V: Valid registration. All codes
N3129P Piper
PA-23
Fixed-wing, multi-engine Judie Bear Air LLC
Bend, Oregon
Standard 2015-12-05 ValidFAA registration status code V: Valid registration. All codes
N51614 Cessna
172P
Fixed-wing, single engine Stillwater Flyers LLC
Columbus, Montana
Restricted 2015-12-05 ValidFAA registration status code V: Valid registration. All codes
N5187W Piper
PA-28-160
Fixed-wing, single engine Individual owner
California
Standard 2015-12-05 ValidFAA registration status code V: Valid registration. All codes
N5344H Cessna
172M
Fixed-wing, single engine A&F Aviation Services LLC
Collierville, Tennessee
Standard 2015-12-05 ValidFAA registration status code V: Valid registration. All codes
N5629W Piper
PA-28-160
Fixed-wing, single engine Individual owner
Minnesota
Standard 2015-12-05 ValidFAA registration status code V: Valid registration. All codes
N64537 Cessna
172M
Fixed-wing, single engine Individual owner
Arizona
Standard 2015-12-05 ValidFAA registration status code V: Valid registration. All codes
N6687J Piper
PA-28-140
Fixed-wing, single engine Rio Creek Aviators LTD
Casco, Wisconsin
Standard 2015-12-05 ValidFAA registration status code V: Valid registration. All codes
N736RM Piper
PA-28-140
Fixed-wing, single engine Individual owner
Alabama
Standard 2015-12-05 ValidFAA registration status code V: Valid registration. All codes
N739GD Cessna
172N
Fixed-wing, single engine Midwest Trucking Transport INC
Willowbrook, Illinois
Standard 2015-12-05 ValidFAA registration status code V: Valid registration. All codes
N7588C Piper
PA-28-140
Fixed-wing, single engine Grand Aviation INC
Grove, Oklahoma
Standard 2015-12-05 ValidFAA registration status code V: Valid registration. All codes
N8244S Robinson Helicopter
R22 BETA
Helicopter Extreme Helicopter Service LLC
Alice, Texas
Standard 2015-12-05 ValidFAA registration status code V: Valid registration. All codes
N8581V Bellanca
7GCBC
Fixed-wing, single engine Obx Airplanes LLC
Manteo, North Carolina
Standard 2015-12-05 ValidFAA registration status code V: Valid registration. All codes
N9855U Grumman American Avn. Corp.
AA-5A
Fixed-wing, single engine Individual owner
Massachusetts
Standard 2015-12-05 ValidFAA registration status code V: Valid registration. All codes
N3948K Piper
PA-28-140
Fixed-wing, single engine Individual owner
Indiana
Standard 2015-12-04 ValidFAA registration status code V: Valid registration. All codes
N5KF Francis Kenneth V
COZY
Fixed-wing, single engine Co-owned owner
Missouri
Experimental 2015-12-04 ValidFAA registration status code V: Valid registration. All codes
N911BU Kliewer George S
RV-6
Fixed-wing, single engine Individual owner
Texas
Experimental 2015-12-04 ValidFAA registration status code V: Valid registration. All codes
N241AW Waters Wesley G
GLASTAR
Fixed-wing, single engine Individual owner
Iowa
Experimental 2015-12-03 ValidFAA registration status code V: Valid registration. All codes
N6450G Cessna
172N
Fixed-wing, single engine N6450G INC
Jacksonville, North Carolina
Standard 2015-12-03 ValidFAA registration status code V: Valid registration. All codes
N739MH Cessna
172N
Fixed-wing, single engine Co-owned owner
California
Standard 2015-12-03 ValidFAA registration status code V: Valid registration. All codes
N9189H Cessna
172M
Fixed-wing, single engine Pendergrass Aviation INC
Demopolis, Alabama
Standard 2015-12-03 ValidFAA registration status code V: Valid registration. All codes
N936SC Schultz Jack
RV4
Fixed-wing, single engine Co-owned owner
Ohio
Experimental 2015-12-03 ValidFAA registration status code V: Valid registration. All codes
N172WE Cessna
172M
Fixed-wing, single engine El Aero Services LLC
Elko, Nevada
Standard 2015-12-02 ValidFAA registration status code V: Valid registration. All codes
N7792D Piper
PA-18-150
Fixed-wing, single engine Miner Farms LLC
Monte Vista, Colorado
Multiple 2015-12-02 ValidFAA registration status code V: Valid registration. All codes
N81972 Piper
PA-28-161
Fixed-wing, single engine Individual owner
New York
Standard 2015-12-02 ValidFAA registration status code V: Valid registration. All codes
N2535F Champion
7GCAA
Fixed-wing, single engine Individual owner
Texas
Standard 2015-12-01 ValidFAA registration status code V: Valid registration. All codes
N511MG Robinson David E
VANS RV-4
Fixed-wing, single engine Individual owner
Ohio
Experimental 2015-12-01 ValidFAA registration status code V: Valid registration. All codes
N8188C Piper
PA-18A 150
Fixed-wing, single engine Individual owner
Texas
Restricted 2015-12-01 ValidFAA registration status code V: Valid registration. All codes
N8753C Piper
PA-18-135
Fixed-wing, single engine Individual owner
Texas
Restricted 2015-12-01 ValidFAA registration status code V: Valid registration. All codes
N73189 Cessna
172M
Fixed-wing, single engine Ellie Air LLC
Mabank, Texas
Standard 2015-11-30 ValidFAA registration status code V: Valid registration. All codes
N7339F Cessna
172N
Fixed-wing, single engine Co-owned owner
Indiana
Standard 2015-11-30 ValidFAA registration status code V: Valid registration. All codes
N733BS Cessna
172N
Fixed-wing, single engine Individual owner
Colorado
Standard 2015-11-30 ValidFAA registration status code V: Valid registration. All codes
N92845 Cessna
172M
Fixed-wing, single engine Hainet Aero LLC
Wilmington, Delaware
Standard 2015-11-30 ValidFAA registration status code V: Valid registration. All codes
N3965Z Piper
PA-18-150
Fixed-wing, single engine Co-owned owner
Alaska
Multiple 2015-11-25 ValidFAA registration status code V: Valid registration. All codes
N172JB Cessna
172M
Fixed-wing, single engine Individual owner
Maine
Standard 2015-11-20 ValidFAA registration status code V: Valid registration. All codes
N727SF Cessna
172I
Fixed-wing, single engine Individual owner
New York
Standard 2015-11-20 ValidFAA registration status code V: Valid registration. All codes
N12865 Cessna
172M
Fixed-wing, single engine Flyright Aviation LLC
Columbus, Ohio
Standard 2015-11-19 ValidFAA registration status code V: Valid registration. All codes
N3388T Cessna
177
Fixed-wing, single engine Individual owner
Washington
Standard 2015-11-19 ValidFAA registration status code V: Valid registration. All codes
N80117 Cessna
172M
Fixed-wing, single engine Valley Fliers Flying Club
Auburn, Washington
Standard 2015-11-19 ValidFAA registration status code V: Valid registration. All codes
N8244U Piper
PA-28-161
Fixed-wing, single engine Individual owner
North Carolina
Standard 2015-11-19 ValidFAA registration status code V: Valid registration. All codes
N8749E Piper
PA-28-151
Fixed-wing, single engine Sheboygan Flight Plane I LLC
Sheboygan, Wisconsin
Standard 2015-11-18 ValidFAA registration status code V: Valid registration. All codes
N12234 Cessna
172M
Fixed-wing, single engine Amelia Reid Aviation LLC
San Jose, California
Standard 2015-11-17 ValidFAA registration status code V: Valid registration. All codes
N1883T Piper
PA-28-140
Fixed-wing, single engine Individual owner
Missouri
Standard 2015-11-17 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.