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
N2898T Piper
PA-28-140
Fixed-wing, single engine R P M Flying Club INC
South Holland, Illinois
Standard 2021-01-25 ValidFAA registration status code V: Valid registration. All codes
N2933V Piper
PA-28-161
Fixed-wing, single engine Individual owner
Nevada
Standard 2021-01-25 ValidFAA registration status code V: Valid registration. All codes
N4227J Piper
PA-28-140
Fixed-wing, single engine Individual owner
Kansas
Standard 2021-01-25 ValidFAA registration status code V: Valid registration. All codes
N4233Q Cessna
172L
Fixed-wing, single engine Individual owner
Alaska
Standard 2021-01-25 ValidFAA registration status code V: Valid registration. All codes
N4456Z Piper
PA-18-150
Fixed-wing, single engine Individual owner
Washington
Standard 2021-01-25 ValidFAA registration status code V: Valid registration. All codes
N5360W Piper
PA-28-150
Fixed-wing, single engine Co-owned owner
Texas
Standard 2021-01-25 ValidFAA registration status code V: Valid registration. All codes
N61739 Cessna
172M
Fixed-wing, single engine Southern Aero LLC
Homestead, Florida
Standard 2021-01-25 ValidFAA registration status code V: Valid registration. All codes
N6624A Piper
PA-18-150
Fixed-wing, single engine Withheld at owner's request
Standard 2021-01-25 ValidFAA registration status code V: Valid registration. All codes
N67HH Heck Howell H
RV4
Fixed-wing, single engine Co-owned owner
Nevada
Experimental 2021-01-25 ValidFAA registration status code V: Valid registration. All codes
N7032M Campbell Collin
RV6-A
Fixed-wing, single engine Individual owner
Colorado
Experimental 2021-01-25 ValidFAA registration status code V: Valid registration. All codes
N7164B Piper
PA-18-150
Fixed-wing, single engine Individual owner
Alaska
Multiple 2021-01-25 ValidFAA registration status code V: Valid registration. All codes
N8518C Piper
PA-20-135
Fixed-wing, single engine Co-owned owner
South Dakota
Standard 2021-01-25 ValidFAA registration status code V: Valid registration. All codes
N26094 Grumman American Avn. Corp.
AA-5A
Fixed-wing, single engine Individual owner
Texas
Standard 2021-01-23 ValidFAA registration status code V: Valid registration. All codes
N32181 Piper
PA-28-151
Fixed-wing, single engine Co-owned owner
Indiana
Standard 2021-01-23 ValidFAA registration status code V: Valid registration. All codes
N64479 Cessna
172M
Fixed-wing, single engine 64479 LLC
Cortland, Ohio
Standard 2021-01-23 ValidFAA registration status code V: Valid registration. All codes
N9822Y Champion
AERONCA 7GCB
Fixed-wing, single engine Montana Aviation Tryst LLC
Kalispell, Montana
Experimental 2021-01-23 ValidFAA registration status code V: Valid registration. All codes
N9895G Cessna
172L
Fixed-wing, single engine Individual owner
Illinois
Standard 2021-01-23 ValidFAA registration status code V: Valid registration. All codes
N6602D Cessna
172N
Fixed-wing, single engine Land of Liberty LLC
Seminole, Florida
Standard 2021-01-22 ValidFAA registration status code V: Valid registration. All codes
N20320 Cessna
172M
Fixed-wing, single engine Seabreeze Aero Club LLC
Wilmington, Delaware
Standard 2021-01-21 ValidFAA registration status code V: Valid registration. All codes
N2302A Robinson Helicopter
R22 BETA
Helicopter Dutchess Community College
Poughkeepsie, New York
Standard 2021-01-21 ValidFAA registration status code V: Valid registration. All codes
N30117 Piper
PA-28-161
Fixed-wing, single engine D & S Aviation LLC
Spring, Texas
Standard 2021-01-21 ValidFAA registration status code V: Valid registration. All codes
N3073U Piper
PA-28-161
Fixed-wing, single engine Jla Aero LLC
State College, Pennsylvania
Standard 2021-01-21 ValidFAA registration status code V: Valid registration. All codes
N39731 Piper
PA-28-161
Fixed-wing, single engine F5 Industries LLC
Tacoma, Washington
Standard 2021-01-21 ValidFAA registration status code V: Valid registration. All codes
N6446L American Aviation
AA-1A
Fixed-wing, single engine Individual owner
California
Standard 2021-01-21 ValidFAA registration status code V: Valid registration. All codes
N79873 Cessna
172K
Fixed-wing, single engine Individual owner
Alaska
Standard 2021-01-21 ValidFAA registration status code V: Valid registration. All codes
N9564H Cessna
172M
Fixed-wing, single engine Individual owner
Massachusetts
Standard 2021-01-21 ValidFAA registration status code V: Valid registration. All codes
N985W Piper
PA-18-150
Fixed-wing, single engine Co-owned owner
Alaska
Standard 2021-01-21 ValidFAA registration status code V: Valid registration. All codes
N20382 Cessna
172M
Fixed-wing, single engine Individual owner
Florida
Standard 2021-01-20 ValidFAA registration status code V: Valid registration. All codes
N300WY Piper
PA-28-140
Fixed-wing, single engine Individual owner
Wyoming
Standard 2021-01-20 ValidFAA registration status code V: Valid registration. All codes
N35318 Cessna
172I
Fixed-wing, single engine Wings LLC
Scottsdale, Arizona
Standard 2021-01-20 ValidFAA registration status code V: Valid registration. All codes
N3592K Piper
PA-28-140
Fixed-wing, single engine Individual owner
New York
Standard 2021-01-20 ValidFAA registration status code V: Valid registration. All codes
N3985Z Piper
PA-18-150
Fixed-wing, single engine Individual owner
Alaska
Multiple 2021-01-20 ValidFAA registration status code V: Valid registration. All codes
N543RV Sandor Robert P
VANS RV6A
Fixed-wing, single engine Individual owner
Arkansas
Experimental 2021-01-20 ValidFAA registration status code V: Valid registration. All codes
N5480L Grumman American Avn. Corp.
AA-5
Fixed-wing, single engine Co-owned owner
Texas
Standard 2021-01-20 ValidFAA registration status code V: Valid registration. All codes
N5715D Piper
PA-22-150
Fixed-wing, single engine Scootair LLC
Alburgh, Vermont
Standard 2021-01-20 ValidFAA registration status code V: Valid registration. All codes
N644FL Piper
PA-28-140
Fixed-wing, single engine Aty Aviation INC
Watertown, South Dakota
Standard 2021-01-20 ValidFAA registration status code V: Valid registration. All codes
N6787T Grumman American Avn. Corp.
AA-5A
Fixed-wing, single engine Star Aerobatics LLC
Columbia City, Indiana
Standard 2021-01-20 ValidFAA registration status code V: Valid registration. All codes
N7289K Piper
PA-18-150
Fixed-wing, single engine Individual owner
Wyoming
Standard 2021-01-20 ValidFAA registration status code V: Valid registration. All codes
N7714D Piper
PA-22-150
Fixed-wing, single engine Individual owner
California
Standard 2021-01-20 ValidFAA registration status code V: Valid registration. All codes
N8445H Piper
PA-28-161
Fixed-wing, single engine Oracle Aviation LLC
Omaha, Nebraska
Standard 2021-01-20 ValidFAA registration status code V: Valid registration. All codes
N8480L Cessna
172I
Fixed-wing, single engine Miss Rebecka LLC
Hancock, Maine
Multiple 2021-01-20 ValidFAA registration status code V: Valid registration. All codes
N990DS Stewart Daniel E
GLASTAR
Fixed-wing, single engine
Experimental 2021-01-20 ValidFAA registration status code V: Valid registration. All codes
N172PF Cessna
172K
Fixed-wing, single engine Individual owner
Tennessee
Standard 2021-01-19 ValidFAA registration status code V: Valid registration. All codes
N2307P Piper
PA-22
Fixed-wing, single engine Individual owner
Washington
Standard 2021-01-19 ValidFAA registration status code V: Valid registration. All codes
N7597V Wing
D-1
Fixed-wing, multi-engine Mulligan Shawn P
Santa Rosa, California
Standard 2021-01-19 ValidFAA registration status code V: Valid registration. All codes
N78558 Piper
PA-12
Fixed-wing, single engine Individual owner
Alaska
Standard 2021-01-19 ValidFAA registration status code V: Valid registration. All codes
N1161A Piper
PA-18-135
Fixed-wing, single engine Individual owner
Alaska
Multiple 2021-01-16 ValidFAA registration status code V: Valid registration. All codes
N1241U Cessna
172M
Fixed-wing, single engine Pensacola Navy Flying Club INC
Pensacola, Florida
Multiple 2021-01-16 ValidFAA registration status code V: Valid registration. All codes
N1931T Grumman American Avn. Corp.
AA-5
Fixed-wing, single engine Individual owner
New York
Standard 2021-01-16 ValidFAA registration status code V: Valid registration. All codes
N7189R Piper
PA-28-140
Fixed-wing, single engine Co-owned owner
Virginia
Standard 2021-01-16 ValidFAA registration status code V: Valid registration. All codes
N738TX Cessna
172N
Fixed-wing, single engine Lavalley Asset Management INC
Potsdam, New York
Standard 2021-01-16 ValidFAA registration status code V: Valid registration. All codes
N8338C Piper
PA-28-140
Fixed-wing, single engine Co-owned owner
North Carolina
Standard 2021-01-16 ValidFAA registration status code V: Valid registration. All codes
N8997V Cessna
172M
Fixed-wing, single engine Husker-Hawkeye Distributing INC DBA
Omaha, Nebraska
Standard 2021-01-16 ValidFAA registration status code V: Valid registration. All codes
N131R Cribbin Peter M
VANS RV-4
Fixed-wing, single engine Individual owner
Washington
Experimental 2021-01-15 ValidFAA registration status code V: Valid registration. All codes
N140PC Cessna
172N
Fixed-wing, single engine Navigation Leasing LLC
Castle Rock, Colorado
Standard 2021-01-15 ValidFAA registration status code V: Valid registration. All codes
N16348 Piper
PA-28-140
Fixed-wing, single engine Individual owner
Texas
Standard 2021-01-15 ValidFAA registration status code V: Valid registration. All codes
N1934P Piper
PA-22-150
Fixed-wing, single engine Co-owned owner
Massachusetts
Standard 2021-01-15 ValidFAA registration status code V: Valid registration. All codes
N20399 Cessna
172M
Fixed-wing, single engine Total Flight Aircraft Leasing LLC
Apex, North Carolina
Standard 2021-01-15 ValidFAA registration status code V: Valid registration. All codes
N6323W Piper
PA-28-140
Fixed-wing, single engine Medicine By Design INC
Miami, Florida
Standard 2021-01-15 ValidFAA registration status code V: Valid registration. All codes
N9572L Cessna
172P
Fixed-wing, single engine Jav Air Services LLC
Anchorage, Alaska
Standard 2021-01-15 ValidFAA registration status code V: Valid registration. All codes
N597DM Cessna
172N
Fixed-wing, single engine Brandon Air LLC
Valley Stream, New York
Standard 2021-01-14 ValidFAA registration status code V: Valid registration. All codes
N725HE American Champion Aircraft
7GCAA
Fixed-wing, single engine Individual owner
California
Standard 2021-01-14 ValidFAA registration status code V: Valid registration. All codes
N737MY Cessna
172N
Fixed-wing, single engine N737My LLC
Mccall, Idaho
Standard 2021-01-14 ValidFAA registration status code V: Valid registration. All codes
N80921 Cessna
172M
Fixed-wing, single engine Conerly Group LLC
Denham Springs, Louisiana
Standard 2021-01-14 ValidFAA registration status code V: Valid registration. All codes
N959HC Cessna
172M
Fixed-wing, single engine Northwest Wings LLC
Hillsboro, Oregon
Standard 2021-01-14 ValidFAA registration status code V: Valid registration. All codes
N3508K Piper
PA-28-140
Fixed-wing, single engine Individual owner
Utah
Standard 2021-01-13 ValidFAA registration status code V: Valid registration. All codes
N4961T Piper
PA-28-140
Fixed-wing, single engine Individual owner
California
Standard 2021-01-13 ValidFAA registration status code V: Valid registration. All codes
N7307J Piper
PA-28-140
Fixed-wing, single engine Individual owner
New Jersey
Standard 2021-01-13 ValidFAA registration status code V: Valid registration. All codes
N739GU Cessna
172N
Fixed-wing, single engine Individual owner
Arkansas
Standard 2021-01-13 ValidFAA registration status code V: Valid registration. All codes
N80597 Cessna
172M
Fixed-wing, single engine Co-owned owner
Arizona
Standard 2021-01-13 ValidFAA registration status code V: Valid registration. All codes
N9709Q Beech
B19
Fixed-wing, single engine Individual owner
Florida
Standard 2021-01-13 ValidFAA registration status code V: Valid registration. All codes
N97NT Childs Tom D
TC1
Fixed-wing, single engine Individual owner
Texas
Experimental 2021-01-13 ValidFAA registration status code V: Valid registration. All codes
N2391W Beech
A23-19
Fixed-wing, single engine Individual owner
California
Standard 2021-01-12 ValidFAA registration status code V: Valid registration. All codes
N3872Q Cessna
172L
Fixed-wing, single engine Co-owned owner
Washington
Standard 2021-01-12 ValidFAA registration status code V: Valid registration. All codes
N3896Z Piper
PA-18-150
Fixed-wing, single engine Individual owner
Alaska
Experimental 2021-01-12 ValidFAA registration status code V: Valid registration. All codes
N4881E Cessna
172N
Fixed-wing, single engine Fulltron Aviation LLC
Springfield, Missouri
Standard 2021-01-12 ValidFAA registration status code V: Valid registration. All codes
N7210G Cessna
172K
Fixed-wing, single engine Individual owner
California
Standard 2021-01-12 ValidFAA registration status code V: Valid registration. All codes
N739JD Cessna
172N
Fixed-wing, single engine Bergstrom Aircraft INC
Pasco, Washington
Restricted 2021-01-12 ValidFAA registration status code V: Valid registration. All codes
N8064R Beech
B19
Fixed-wing, single engine N8064R LLC
Kalispell, Montana
Standard 2021-01-12 ValidFAA registration status code V: Valid registration. All codes
N8473R Piper
PA-28-140
Fixed-wing, single engine Individual owner
Oklahoma
Standard 2021-01-12 ValidFAA registration status code V: Valid registration. All codes
N99715 Cessna
172P
Fixed-wing, single engine N99715 LLC
Wheeling, Illinois
Standard 2021-01-12 ValidFAA registration status code V: Valid registration. All codes
N5158W Piper
PA-28
Fixed-wing, single engine Individual owner
New York
Standard 2021-01-11 ValidFAA registration status code V: Valid registration. All codes
N9747W Piper
PA-28-140
Fixed-wing, single engine Individual owner
Nevada
Standard 2021-01-11 ValidFAA registration status code V: Valid registration. All codes
N2167E Cessna
172N
Fixed-wing, single engine Individual owner
Oklahoma
Standard 2021-01-09 ValidFAA registration status code V: Valid registration. All codes
N2832M Piper
PA-28-161
Fixed-wing, single engine Individual owner
Washington
Standard 2021-01-09 ValidFAA registration status code V: Valid registration. All codes
N285MK Piper
PA-28-161
Fixed-wing, single engine Plane Nonsense INC
Middletown, Delaware
Standard 2021-01-09 ValidFAA registration status code V: Valid registration. All codes
N291MK Piper
PA-28-161
Fixed-wing, single engine Plane Nonsense INC
Middletown, Delaware
Standard 2021-01-09 ValidFAA registration status code V: Valid registration. All codes
N3816Q Cessna
172L
Fixed-wing, single engine Goli Aviation LLC
Raleigh, North Carolina
Standard 2021-01-09 ValidFAA registration status code V: Valid registration. All codes
N4428J Piper
PA-28-140
Fixed-wing, single engine Individual owner
Florida
Standard 2021-01-09 ValidFAA registration status code V: Valid registration. All codes
N6020L American
AA-5
Fixed-wing, single engine Individual owner
California
Standard 2021-01-09 ValidFAA registration status code V: Valid registration. All codes
N7535H Piper
PA-12
Fixed-wing, single engine Individual owner
Montana
Standard 2021-01-09 ValidFAA registration status code V: Valid registration. All codes
N9021L Champion
7GCAA
Fixed-wing, single engine Individual owner
Arkansas
Standard 2021-01-09 ValidFAA registration status code V: Valid registration. All codes
N2836X Cessna
177
Fixed-wing, single engine Individual owner
Washington
Standard 2021-01-08 ValidFAA registration status code V: Valid registration. All codes
N3442M Piper
PA-12
Fixed-wing, single engine Individual owner
Alaska
Standard 2021-01-08 ValidFAA registration status code V: Valid registration. All codes
N79191 Cessna
172K
Fixed-wing, single engine Individual owner
South Carolina
Standard 2021-01-08 ValidFAA registration status code V: Valid registration. All codes
N2562K Halverson Greg
THORP T 18
Fixed-wing, single engine Individual owner
Texas
Experimental 2021-01-07 ValidFAA registration status code V: Valid registration. All codes
N5397R Cessna
172M
Fixed-wing, single engine Iowa Lakes Community College
Estherville, Iowa
Standard 2021-01-07 ValidFAA registration status code V: Valid registration. All codes
N9916D Piper
PA-18A
Fixed-wing, single engine Individual owner
Alaska
Restricted 2021-01-07 ValidFAA registration status code V: Valid registration. All codes
N1424V Cessna
172M
Fixed-wing, single engine Rtd Aviation LLC
Hillsborough, New Jersey
Standard 2021-01-06 ValidFAA registration status code V: Valid registration. All codes
N33847 Piper
PA-28-140
Fixed-wing, single engine
Standard 2021-01-06 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.