The U.S. aircraft register, updated daily
Engines · piston (reciprocating) · data as of October 8, 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
N8216C Piper
PA-18A
Fixed-wing, single engine Individual owner
Alaska
Standard 2023-06-17 ValidFAA registration status code V: Valid registration. All codes
N84185 Cessna
172K
Fixed-wing, single engine Individual owner
Oregon
Standard 2023-06-17 ValidFAA registration status code V: Valid registration. All codes
N9709D Piper
PA-22-160
Fixed-wing, single engine Individual owner
Kansas
Standard 2023-06-17 ValidFAA registration status code V: Valid registration. All codes
N5885D Piper
PA-18A 150
Fixed-wing, single engine Individual owner
Alaska
Restricted 2023-06-16 ValidFAA registration status code V: Valid registration. All codes
N6974B Piper
PA-18-150
Fixed-wing, single engine Co-owned owner
Alaska
Multiple 2023-06-16 ValidFAA registration status code V: Valid registration. All codes
N73439 Cessna
172M
Fixed-wing, single engine Umo Flight School LLC
Mount Olive, North Carolina
Standard 2023-06-16 ValidFAA registration status code V: Valid registration. All codes
N734PS Cessna
172N
Fixed-wing, single engine Umo Flight School LLC
Mount Olive, North Carolina
Standard 2023-06-16 ValidFAA registration status code V: Valid registration. All codes
N1948F Cessna
172N
Fixed-wing, single engine Kdrd Holdings LLC
Texas City, Texas
Standard 2023-06-15 ValidFAA registration status code V: Valid registration. All codes
N3503K Piper
PA-28-140
Fixed-wing, single engine Individual owner
North Carolina
Standard 2023-06-15 ValidFAA registration status code V: Valid registration. All codes
N3903Z Piper
PA-18-150
Fixed-wing, single engine Individual owner
Alaska
Standard 2023-06-15 ValidFAA registration status code V: Valid registration. All codes
N404SW Cessna
172I
Fixed-wing, single engine Individual owner
Tennessee
Standard 2023-06-15 ValidFAA registration status code V: Valid registration. All codes
N5423J Cessna
172N
Fixed-wing, single engine Rialto Christian Flyers Club INC
Bradenton, Florida
Standard 2023-06-15 ValidFAA registration status code V: Valid registration. All codes
N63A Coblentz Fred P
BUSHBY MUSTANG II
Fixed-wing, single engine Individual owner
Texas
Experimental 2023-06-15 ValidFAA registration status code V: Valid registration. All codes
N651FT Piper
PA-28-151
Fixed-wing, single engine St Louis Flight Training LLC
Cahokia, Illinois
Standard 2023-06-15 ValidFAA registration status code V: Valid registration. All codes
N733LF Cessna
172N
Fixed-wing, single engine Perfect Speed LLC
Burlington, Massachusetts
Standard 2023-06-15 ValidFAA registration status code V: Valid registration. All codes
N7842G Cessna
172L
Fixed-wing, single engine Childress Aviation LLC
Conway, Arkansas
Standard 2023-06-15 ValidFAA registration status code V: Valid registration. All codes
N12952 Cessna
172M
Fixed-wing, single engine Individual owner
Arizona
Standard 2023-06-14 ValidFAA registration status code V: Valid registration. All codes
N13065 Cessna
172M
Fixed-wing, single engine Pacific Flight Academy LLC
Honolulu, Hawaii
Standard 2023-06-14 ValidFAA registration status code V: Valid registration. All codes
N15298 Piper
PA-28-140
Fixed-wing, single engine Gcs Aviation Services LLC
Fleming Island, Florida
Standard 2023-06-14 ValidFAA registration status code V: Valid registration. All codes
N2457H Piper
PA-18-150
Fixed-wing, single engine Co-owned owner
Washington
Standard 2023-06-14 ValidFAA registration status code V: Valid registration. All codes
N2573J Piper
PA-18-150
Fixed-wing, single engine Individual owner
California
Standard 2023-06-14 ValidFAA registration status code V: Valid registration. All codes
N2590X Robinson Helicopter
R22 MARINER
Helicopter C B W Landscaping Construction CO INC
Framingham, Massachusetts
Standard 2023-06-14 ValidFAA registration status code V: Valid registration. All codes
N35358 Cessna
172I
Fixed-wing, single engine N44344 LLC
Wasilla, Alaska
Standard 2023-06-14 ValidFAA registration status code V: Valid registration. All codes
N737TD Cessna
172N
Fixed-wing, single engine Jarvis Jeffrey S
Portland, Oregon
Standard 2023-06-14 ValidFAA registration status code V: Valid registration. All codes
N769AK Piper
PA-18-150
Fixed-wing, single engine Individual owner
Alaska
Standard 2023-06-14 ValidFAA registration status code V: Valid registration. All codes
N79579 Cessna
172K
Fixed-wing, single engine Individual owner
Arizona
Standard 2023-06-14 ValidFAA registration status code V: Valid registration. All codes
N8700N Piper
PA-28-140
Fixed-wing, single engine Individual owner
Texas
Standard 2023-06-14 ValidFAA registration status code V: Valid registration. All codes
N8CK Champion
7GCBC
Fixed-wing, single engine Individual owner
Alaska
Multiple 2023-06-14 ValidFAA registration status code V: Valid registration. All codes
N9142K Piper
PA-28-151
Fixed-wing, single engine Individual owner
Michigan
Standard 2023-06-14 ValidFAA registration status code V: Valid registration. All codes
N1220U Fowler Roland L
MARQUART CHARGER
Fixed-wing, single engine Individual owner
Wisconsin
Experimental 2023-06-13 ValidFAA registration status code V: Valid registration. All codes
N12555 Cessna
172M
Fixed-wing, single engine Individual owner
New Jersey
Standard 2023-06-13 ValidFAA registration status code V: Valid registration. All codes
N2345Y Cessna
177
Fixed-wing, single engine Individual owner
Texas
Standard 2023-06-13 ValidFAA registration status code V: Valid registration. All codes
N41983 Piper
PA-28-151
Fixed-wing, single engine Brotherman LLC
Hereford, Texas
Standard 2023-06-13 ValidFAA registration status code V: Valid registration. All codes
N422 Kindig Richard K
KINDIG/GLASSAIR-1
Fixed-wing, single engine Datum Aviation LLC
Milton, Florida
Experimental 2023-06-13 ValidFAA registration status code V: Valid registration. All codes
N733CZ Cessna
172N
Fixed-wing, single engine Manning and Sons Property LLC
Summerville, South Carolina
Standard 2023-06-13 ValidFAA registration status code V: Valid registration. All codes
N79321 Cessna
172K
Fixed-wing, single engine Withheld at owner's request
Restricted 2023-06-13 ValidFAA registration status code V: Valid registration. All codes
N8490Y Piper
PA-18-150
Fixed-wing, single engine Golden Eagle Outfitters INC
Delta Junction, Alaska
Standard 2023-06-13 ValidFAA registration status code V: Valid registration. All codes
N9287S Beech
B19
Fixed-wing, single engine Individual owner
North Carolina
Standard 2023-06-13 ValidFAA registration status code V: Valid registration. All codes
N9616Q Cessna
172M
Fixed-wing, single engine Clearview Flying Club INC
Westminster, Maryland
Standard 2023-06-13 ValidFAA registration status code V: Valid registration. All codes
N9870U Grumman American Avn. Corp.
AA-5A
Fixed-wing, single engine Individual owner
Texas
Standard 2023-06-13 ValidFAA registration status code V: Valid registration. All codes
N101US Cessna
172M
Fixed-wing, single engine Usaeroflight LLC
Greenville, South Carolina
Standard 2023-06-12 ValidFAA registration status code V: Valid registration. All codes
N139BS Saindon William F
RV-3A
Fixed-wing, single engine Individual owner
Florida
Experimental 2023-06-12 ValidFAA registration status code V: Valid registration. All codes
N2861Q Cessna
172L
Fixed-wing, single engine Individual owner
Texas
Standard 2023-06-12 ValidFAA registration status code V: Valid registration. All codes
N5319D Cessna
172N
Fixed-wing, single engine Coachron Investments LLC
Grosse Ile, Michigan
Standard 2023-06-12 ValidFAA registration status code V: Valid registration. All codes
N5795W Piper
PA-28-150
Fixed-wing, single engine Individual owner
Arkansas
Standard 2023-06-12 ValidFAA registration status code V: Valid registration. All codes
N61704 Cessna
172M
Fixed-wing, single engine Individual owner
Virginia
Standard 2023-06-12 ValidFAA registration status code V: Valid registration. All codes
N61928 Cessna
172M
Fixed-wing, single engine Individual owner
Arizona
Standard 2023-06-12 ValidFAA registration status code V: Valid registration. All codes
N6529C Piper
PA-28-161
Fixed-wing, single engine Individual owner
Texas
Standard 2023-06-12 ValidFAA registration status code V: Valid registration. All codes
N694PS Piper
PA-23-160
Fixed-wing, multi-engine Individual owner
Georgia
Standard 2023-06-12 ValidFAA registration status code V: Valid registration. All codes
N739AP Cessna
172N
Fixed-wing, single engine Milwaukee Aero LLC
Milwaukee, Wisconsin
Standard 2023-06-12 ValidFAA registration status code V: Valid registration. All codes
N320SL Sayres D/Leady D
MONTANA COYOTE
Fixed-wing, single engine Individual owner
Alaska
Experimental 2023-06-11 ValidFAA registration status code V: Valid registration. All codes
N5482L Grumman American Avn. Corp.
AA-5
Fixed-wing, single engine Individual owner
Indiana
Standard 2023-06-11 ValidFAA registration status code V: Valid registration. All codes
N44855 Piper
PA-28-161
Fixed-wing, single engine Individual owner
California
Standard 2023-06-10 ValidFAA registration status code V: Valid registration. All codes
N6338F Cessna
172N
Fixed-wing, single engine Raritan Valley Flying School
Princeton, New Jersey
Standard 2023-06-10 ValidFAA registration status code V: Valid registration. All codes
N6554D Cessna
172N
Fixed-wing, single engine Hancock Jeffrey D
Delta, Colorado
Standard 2023-06-10 ValidFAA registration status code V: Valid registration. All codes
N15423 Piper
PA-28-140
Fixed-wing, single engine Individual owner
Georgia
Standard 2023-06-09 ValidFAA registration status code V: Valid registration. All codes
N16317 Piper
PA-28-140
Fixed-wing, single engine Wolf Aviation Network INC
Westfield, Massachusetts
Standard 2023-06-09 ValidFAA registration status code V: Valid registration. All codes
N172LG Cessna
172M
Fixed-wing, single engine Co-owned owner
Florida
Standard 2023-06-09 ValidFAA registration status code V: Valid registration. All codes
N2379Y Cessna
177
Fixed-wing, single engine Co-owned owner
Texas
Standard 2023-06-09 ValidFAA registration status code V: Valid registration. All codes
N3668K Piper
PA-28-140
Fixed-wing, single engine Piston Aviation LLC
Saint Charles, Missouri
Standard 2023-06-09 ValidFAA registration status code V: Valid registration. All codes
N4627Y Piper
PA-18-150
Fixed-wing, single engine Individual owner
Minnesota
Standard 2023-06-09 ValidFAA registration status code V: Valid registration. All codes
N4788D Cessna
172N
Fixed-wing, single engine Jb Aviation Flight School INC
Wonder Lake, Illinois
Standard 2023-06-09 ValidFAA registration status code V: Valid registration. All codes
N615FT Piper
PA-28-161
Fixed-wing, single engine Florida Institute of Technology
Melbourne, Florida
Standard 2023-06-09 ValidFAA registration status code V: Valid registration. All codes
N724FL Piper
PA-28-140
Fixed-wing, single engine Uncle Tommy LLC
Aurora, Illinois
Standard 2023-06-09 ValidFAA registration status code V: Valid registration. All codes
N73787 Cessna
172N
Fixed-wing, single engine Pegasus Flying Club LLC
Mccordsville, Indiana
Standard 2023-06-09 ValidFAA registration status code V: Valid registration. All codes
N2172D Piper
PA-28-161
Fixed-wing, single engine Wifa (Washington International Flight Academy) LLC
Gaithersburg, Maryland
Standard 2023-06-08 ValidFAA registration status code V: Valid registration. All codes
N30239 Cessna
177
Fixed-wing, single engine Co-owned owner
California
Standard 2023-06-08 ValidFAA registration status code V: Valid registration. All codes
N5555W Piper
PA-28-160
Fixed-wing, single engine Individual owner
California
Standard 2023-06-08 ValidFAA registration status code V: Valid registration. All codes
N5999Z Piper
PA-18-150
Fixed-wing, single engine Individual owner
Alaska
Standard 2023-06-08 ValidFAA registration status code V: Valid registration. All codes
N7789C Joseph P Casady
PA-18 REPLICA
Fixed-wing, single engine Individual owner
Washington
Experimental 2023-06-08 ValidFAA registration status code V: Valid registration. All codes
N13460 Cessna
172M
Fixed-wing, single engine Individual owner
Texas
Standard 2023-06-07 ValidFAA registration status code V: Valid registration. All codes
N24025 Beech
B19
Fixed-wing, single engine Individual owner
South Carolina
Standard 2023-06-07 ValidFAA registration status code V: Valid registration. All codes
N3246T Cessna
177
Fixed-wing, single engine Co-owned owner
Indiana
Standard 2023-06-07 ValidFAA registration status code V: Valid registration. All codes
N3554Z Piper
PA-22-150
Fixed-wing, single engine Individual owner
Oklahoma
Standard 2023-06-07 ValidFAA registration status code V: Valid registration. All codes
N451DD Robinson Helicopter
R22 BETA
Helicopter Jth Holdings LLC
Flemingsburg, Kentucky
Standard 2023-06-07 ValidFAA registration status code V: Valid registration. All codes
N46570 Cessna
172K
Fixed-wing, single engine Individual owner
California
Standard 2023-06-07 ValidFAA registration status code V: Valid registration. All codes
N5279T Piper
PA-28-140
Fixed-wing, single engine Individual owner
Pennsylvania
Standard 2023-06-07 ValidFAA registration status code V: Valid registration. All codes
N829RW Wessel Robin Y
RV-6A
Fixed-wing, single engine Individual owner
Texas
Experimental 2023-06-07 ValidFAA registration status code V: Valid registration. All codes
N95424 Piper
PA-28-140
Fixed-wing, single engine Air69 LLC
Kaiser, Missouri
Standard 2023-06-07 ValidFAA registration status code V: Valid registration. All codes
N10QL Foster/Baker
GLASAIR RG
Fixed-wing, single engine Individual owner
California
Experimental 2023-06-06 ValidFAA registration status code V: Valid registration. All codes
N32876 Piper
PA-28-151
Fixed-wing, single engine J-Mac Aviation Services LLC
Andalusia, Alabama
Standard 2023-06-06 ValidFAA registration status code V: Valid registration. All codes
N35567 Cessna
172I
Fixed-wing, single engine Individual owner
Colorado
Standard 2023-06-06 ValidFAA registration status code V: Valid registration. All codes
N5981U Piper
PA-28-140
Fixed-wing, single engine East Sun CORP
Greensboro, North Carolina
Standard 2023-06-06 ValidFAA registration status code V: Valid registration. All codes
N61610 Cessna
172M
Fixed-wing, single engine Sugarpine Skies LLC
San Jose, California
Standard 2023-06-06 ValidFAA registration status code V: Valid registration. All codes
N63113 Cessna
172P
Fixed-wing, single engine High Road Time LLC
West Palm Beach, Florida
Standard 2023-06-06 ValidFAA registration status code V: Valid registration. All codes
N65058 Cessna
172P
Fixed-wing, single engine Organization of Black Aerospace Professionals INC
Westchester, Illinois
Standard 2023-06-06 ValidFAA registration status code V: Valid registration. All codes
N7305J Piper
PA-28-140
Fixed-wing, single engine Individual owner
Connecticut
Standard 2023-06-06 ValidFAA registration status code V: Valid registration. All codes
N91LS Scales Lowell D
LANCAIR 320
Fixed-wing, single engine Individual owner
Michigan
Experimental 2023-06-06 ValidFAA registration status code V: Valid registration. All codes
N9656U Grumman American Avn. Corp.
AA-5A
Fixed-wing, single engine Individual owner
New Hampshire
Standard 2023-06-06 ValidFAA registration status code V: Valid registration. All codes
N9674K Piper
PA-28-151
Fixed-wing, single engine Individual owner
Oregon
Standard 2023-06-06 ValidFAA registration status code V: Valid registration. All codes
N3556P Piper
PA-22-150
Fixed-wing, single engine Planes & Things INC
Collinsville, Oklahoma
Standard 2023-06-05 ValidFAA registration status code V: Valid registration. All codes
N6144D Piper
PA-22-150
Fixed-wing, single engine Co-owned owner
Utah
Standard 2023-06-05 ValidFAA registration status code V: Valid registration. All codes
N65665 Cessna
172P
Fixed-wing, single engine Individual owner
Connecticut
Standard 2023-06-05 ValidFAA registration status code V: Valid registration. All codes
N72WR Piper
PA-18-150
Fixed-wing, single engine Individual owner
Alaska
Standard 2023-06-05 ValidFAA registration status code V: Valid registration. All codes
N5833W Piper
PA-28-160
Fixed-wing, single engine Jts Aircraft LLC
Rock Hill, South Carolina
Standard 2023-06-04 ValidFAA registration status code V: Valid registration. All codes
N6086W Piper
PA-28-140
Fixed-wing, single engine Pegasus Ir LLC
Miami, Florida
Standard 2023-06-04 ValidFAA registration status code V: Valid registration. All codes
N6543W Piper
PA-28-140
Fixed-wing, single engine Jts Aircraft LLC
Rock Hill, South Carolina
Standard 2023-06-04 ValidFAA registration status code V: Valid registration. All codes
N8456L Cessna
172I
Fixed-wing, single engine Cherryhill Aviation INC
Freetown, Indiana
Standard 2023-06-04 ValidFAA registration status code V: Valid registration. All codes
N897MB Piper
PA-28-140
Fixed-wing, single engine Jts Aircraft LLC
Rock Hill, South Carolina
Standard 2023-06-04 ValidFAA registration status code V: Valid registration. All codes
N35795 Cessna
172I
Fixed-wing, single engine N35795 LLC
Fredericksburg, Texas
Standard 2023-06-03 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 8, 2026. Horsepower and thrust are the FAA's figures for the series, not for a particular aircraft.