The U.S. aircraft register, updated daily
Engines · piston (reciprocating) · data as of October 7, 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

These connections as data: /graph/engine/lycoming-o-320-series.json · about the eFlight graph.

Aircraft newest certificates first · 27,315

Tail no.Maker and modelGroupOwner and baseCertificateRegisteredStatus
N5509J Cessna
172N
Fixed-wing, single engine Jet Air INC
Iowa City, Iowa
Standard 2025-03-20 ValidFAA registration status code V: Valid registration. All codes
N56083 Piper
PA-28-140
Fixed-wing, single engine Rock Solid Aviation LLC
Lake Charles, Louisiana
Standard 2025-03-20 ValidFAA registration status code V: Valid registration. All codes
N6538F Cessna
172N
Fixed-wing, single engine Mbk Leasing and Consulting LLC
Lakeland, Florida
Standard 2025-03-20 ValidFAA registration status code V: Valid registration. All codes
N7337L Piper
PA-18-150
Fixed-wing, single engine Kiehl Flying Service LLC
Winnett, Montana
Multiple 2025-03-20 ValidFAA registration status code V: Valid registration. All codes
N733RF Cessna
172N
Fixed-wing, single engine Baymax Aviation LLC
Ronkonkoma, New York
Standard 2025-03-20 ValidFAA registration status code V: Valid registration. All codes
N8077N Piper
PA-28-140
Fixed-wing, single engine Individual owner
Alabama
Standard 2025-03-20 ValidFAA registration status code V: Valid registration. All codes
N172CG Cessna
172M
Fixed-wing, single engine Wings Over Texas Holdings LLC
Denton, Texas
Standard 2025-03-19 ValidFAA registration status code V: Valid registration. All codes
N1758T Piper
PA-28-140
Fixed-wing, single engine Co-owned owner
California
Standard 2025-03-19 ValidFAA registration status code V: Valid registration. All codes
N2372W Beech
A23-19
Fixed-wing, single engine Hulme Aviation LLC
Gilbert, Arizona
Standard 2025-03-19 ValidFAA registration status code V: Valid registration. All codes
N242LE Eidson Merrill L
LONG EZ
Fixed-wing, single engine Sky King Aviation Services INC
Ardmore, Oklahoma
Experimental 2025-03-19 ValidFAA registration status code V: Valid registration. All codes
N6323 Keiling
BAKENG DUCE
Fixed-wing, single engine Individual owner
Tennessee
Experimental 2025-03-19 ValidFAA registration status code V: Valid registration. All codes
N691DS Stewart Daniel E
RV-6
Fixed-wing, single engine Individual owner
Montana
Experimental 2025-03-19 ValidFAA registration status code V: Valid registration. All codes
N734JX Cessna
172N
Fixed-wing, single engine Individual owner
Oklahoma
Standard 2025-03-19 ValidFAA registration status code V: Valid registration. All codes
N8824N Piper
PA-28-140
Fixed-wing, single engine Individual owner
Arkansas
Standard 2025-03-19 ValidFAA registration status code V: Valid registration. All codes
N9680W Piper
PA-28-140
Fixed-wing, single engine Individual owner
California
Standard 2025-03-19 ValidFAA registration status code V: Valid registration. All codes
N1675J Piper
PA-28-140
Fixed-wing, single engine Tevis Aviation INC
Emporia, Kansas
Standard 2025-03-18 ValidFAA registration status code V: Valid registration. All codes
N342JB Cessna
177
Fixed-wing, single engine Central Ohio Flyers Association
Columbus, Ohio
Standard 2025-03-18 ValidFAA registration status code V: Valid registration. All codes
N43CD Deacon Clarke E
DEACON CJ4
Fixed-wing, single engine Individual owner
Texas
Experimental 2025-03-18 ValidFAA registration status code V: Valid registration. All codes
N54B Piper
PA-22-150
Fixed-wing, single engine Cloud Nine Ventures LLC
Riverview, Florida
Standard 2025-03-18 ValidFAA registration status code V: Valid registration. All codes
N64364 Cessna
172M
Fixed-wing, single engine B&R Aircraft LLC
Wadsworth, Ohio
Standard 2025-03-18 ValidFAA registration status code V: Valid registration. All codes
N733ES Cessna
172N
Fixed-wing, single engine Wings Over Texas Holdings LLC
Denton, Texas
Standard 2025-03-18 ValidFAA registration status code V: Valid registration. All codes
N738JS Cessna
172N
Fixed-wing, single engine Wings Over Texas Holdings LLC
Denton, Texas
Standard 2025-03-18 ValidFAA registration status code V: Valid registration. All codes
N7761B Brittingham Charles Thomas
RV6A
Fixed-wing, single engine Individual owner
Wisconsin
Experimental 2025-03-18 ValidFAA registration status code V: Valid registration. All codes
N79244 Cessna
172K
Fixed-wing, single engine Wings Over Texas Holdings LLC
Denton, Texas
Standard 2025-03-18 ValidFAA registration status code V: Valid registration. All codes
N80991 Cessna
172M
Fixed-wing, single engine Co-owned owner
Texas
Standard 2025-03-18 ValidFAA registration status code V: Valid registration. All codes
N98131 Piper
PA-28-140
Fixed-wing, single engine Withheld at owner's request
Standard 2025-03-18 ValidFAA registration status code V: Valid registration. All codes
N1645B Berg Allen C
ALLEN BERG GLASTAR
Fixed-wing, single engine Iko Aero Services LLC
Natchez, Mississippi
Experimental 2025-03-17 ValidFAA registration status code V: Valid registration. All codes
N3046M Piper
PA-28-161
Fixed-wing, single engine Ms Miami Properties LLC
Doral, Florida
Standard 2025-03-17 ValidFAA registration status code V: Valid registration. All codes
N6695W Piper
PA-28-140
Fixed-wing, single engine Individual owner
Texas
Standard 2025-03-17 ValidFAA registration status code V: Valid registration. All codes
N809BT Cessna
172M
Fixed-wing, single engine Louisville Aircraft Leasing LLC
Louisville, Kentucky
Standard 2025-03-17 ValidFAA registration status code V: Valid registration. All codes
N82353 Piper
PA-18-150
Fixed-wing, single engine Co-owned owner
Montana
Standard 2025-03-17 ValidFAA registration status code V: Valid registration. All codes
N7467R Piper
PA-28-140
Fixed-wing, single engine Individual owner
California
Standard 2025-03-16 ValidFAA registration status code V: Valid registration. All codes
N12HZ Cessna
172M
Fixed-wing, single engine Co-owned owner
Ohio
Standard 2025-03-15 ValidFAA registration status code V: Valid registration. All codes
N2101E Cessna
172N
Fixed-wing, single engine V1 Aviation LLC
Englewood, Colorado
Standard 2025-03-15 ValidFAA registration status code V: Valid registration. All codes
N2424A Piper
PA-18-150
Fixed-wing, single engine Individual owner
Florida
Standard 2025-03-15 ValidFAA registration status code V: Valid registration. All codes
N292EH Piper
PA-28-140
Fixed-wing, single engine Glorybe2 LLC
Saluda, South Carolina
Standard 2025-03-15 ValidFAA registration status code V: Valid registration. All codes
N546PS Swensen Philip R
RV-6
Fixed-wing, single engine Climb LLC
Kalispell, Montana
Experimental 2025-03-15 ValidFAA registration status code V: Valid registration. All codes
N82619 Piper
PA-18-150
Fixed-wing, single engine Cherry Hill Aviation INC
Freetown, Indiana
Standard 2025-03-15 ValidFAA registration status code V: Valid registration. All codes
N8837D Piper
PA-22-150
Fixed-wing, single engine Comanche Bloom Enterprises LLC
Purcellville, Virginia
Standard 2025-03-15 ValidFAA registration status code V: Valid registration. All codes
N904DC Cunningham Danny L
RV-9A
Fixed-wing, single engine Individual owner
California
Experimental 2025-03-15 ValidFAA registration status code V: Valid registration. All codes
N98171 Piper
PA-28-140
Fixed-wing, single engine Aberdeen School District
Aberdeen, Mississippi
Standard 2025-03-15 ValidFAA registration status code V: Valid registration. All codes
N111DB Piper
PA-18-135
Fixed-wing, single engine Raven Aviation LLC
Lewistown, Montana
Standard 2025-03-14 ValidFAA registration status code V: Valid registration. All codes
N26708 Grumman American Avn. Corp.
AA-5A
Fixed-wing, single engine Flying Chester Cheetah LLC
Valdosta, Georgia
Standard 2025-03-14 ValidFAA registration status code V: Valid registration. All codes
N2754E Cessna
172N
Fixed-wing, single engine Gulf Coast Helicopters INC
Pearland, Texas
Standard 2025-03-14 ValidFAA registration status code V: Valid registration. All codes
N2851S Piper
PA-28-161
Fixed-wing, single engine Individual owner
Florida
Standard 2025-03-14 ValidFAA registration status code V: Valid registration. All codes
N4219Q Cessna
172L
Fixed-wing, single engine Audrain Flying Club INC
Mexico, Missouri
Standard 2025-03-14 ValidFAA registration status code V: Valid registration. All codes
N51875 Cessna
172P
Fixed-wing, single engine Wings Over Texas Holdings LLC
Denton, Texas
Standard 2025-03-14 ValidFAA registration status code V: Valid registration. All codes
N63767 Cessna
172P
Fixed-wing, single engine Wings Over Texas Holdings LLC
Denton, Texas
Standard 2025-03-14 ValidFAA registration status code V: Valid registration. All codes
N6523R Tremaine Richard E
RV-4
Fixed-wing, single engine Co-owned owner
Nevada
Experimental 2025-03-14 ValidFAA registration status code V: Valid registration. All codes
N7049G Cessna
172K
Fixed-wing, single engine Louisville Aircraft Leasing LLC
Louisville, Kentucky
Multiple 2025-03-14 ValidFAA registration status code V: Valid registration. All codes
N82985 Piper
PA-18-150
Fixed-wing, single engine Individual owner
Virginia
Standard 2025-03-14 ValidFAA registration status code V: Valid registration. All codes
N8499R Piper
PA-28-140
Fixed-wing, single engine Individual owner
Florida
Standard 2025-03-14 ValidFAA registration status code V: Valid registration. All codes
N150TB Piper
PA-18A 150
Fixed-wing, single engine Stevann Farms LTD
De Witt, Iowa
Standard 2025-03-13 ValidFAA registration status code V: Valid registration. All codes
N2486P Piper
PA-22-150
Fixed-wing, single engine Individual owner
Texas
Standard 2025-03-13 ValidFAA registration status code V: Valid registration. All codes
N3731D Cessna
150
Fixed-wing, single engine Individual owner
Illinois
Restricted 2025-03-13 ValidFAA registration status code V: Valid registration. All codes
N602Z Bellanca
7ECA
Fixed-wing, single engine Cook Innovative Enterprises LLC
Missoula, Montana
Standard 2025-03-13 ValidFAA registration status code V: Valid registration. All codes
N6130D Cessna
172N
Fixed-wing, single engine Individual owner
North Carolina
Standard 2025-03-13 ValidFAA registration status code V: Valid registration. All codes
N79416 Cessna
172K
Fixed-wing, single engine Individual owner
Georgia
Standard 2025-03-13 ValidFAA registration status code V: Valid registration. All codes
N907AG Piper
PA-22-150
Fixed-wing, single engine Antique Aircraft and Automobile LLC
Van Alstyne, Texas
Standard 2025-03-13 ValidFAA registration status code V: Valid registration. All codes
N9861Q Cessna
172M
Fixed-wing, single engine Fallon Muni Flyers LLC
Fallon, Nevada
Standard 2025-03-13 ValidFAA registration status code V: Valid registration. All codes
N20393 Cessna
172M
Fixed-wing, single engine Nextgen Flying LLC
Pigeon Forge, Tennessee
Standard 2025-03-12 ValidFAA registration status code V: Valid registration. All codes
N21KJ Piper
PA-28-140
Fixed-wing, single engine Cherokee LLC
Lewiston, Maine
Standard 2025-03-12 ValidFAA registration status code V: Valid registration. All codes
N284P Piper
PA-28-140
Fixed-wing, single engine Individual owner
Georgia
Standard 2025-03-12 ValidFAA registration status code V: Valid registration. All codes
N2876T Piper
PA-28-140
Fixed-wing, single engine Gear Up Aircraft Rental LLC
Warner Robins, Georgia
Standard 2025-03-12 ValidFAA registration status code V: Valid registration. All codes
N32RV Hiatt Bradley J
VANS ACFT INC RV-6A
Fixed-wing, single engine Individual owner
Florida
Experimental 2025-03-12 ValidFAA registration status code V: Valid registration. All codes
N40ST Towner Miles Allen
VANS RV-6A
Fixed-wing, single engine Individual owner
Florida
Experimental 2025-03-12 ValidFAA registration status code V: Valid registration. All codes
N658NV Cessna
172P
Fixed-wing, single engine Jp Aero Holdings INC
Carson City, Nevada
Standard 2025-03-12 ValidFAA registration status code V: Valid registration. All codes
N6678F Piper
PA-28-151
Fixed-wing, single engine Aircraft Guaranty CORP Trustee
Oklahoma City, Oklahoma
Standard 2025-03-12 ValidFAA registration status code V: Valid registration. All codes
N7142L Grumman American Avn. Corp.
AA-5
Fixed-wing, single engine Individual owner
Florida
Standard 2025-03-12 ValidFAA registration status code V: Valid registration. All codes
N7610D Piper
PA-22-150
Fixed-wing, single engine Bug Smashers LLC
Winfield, Kansas
Standard 2025-03-12 ValidFAA registration status code V: Valid registration. All codes
N8526Z Piper
PA-20
Fixed-wing, single engine Individual owner
Minnesota
Standard 2025-03-12 ValidFAA registration status code V: Valid registration. All codes
N9193G Cessna
172N
Fixed-wing, single engine Mach One Velocity LLC
Macomb Twp, Michigan
Standard 2025-03-12 ValidFAA registration status code V: Valid registration. All codes
N95RW Dickinson Richard W
RV-4
Fixed-wing, single engine Individual owner
Oregon
Experimental 2025-03-12 ValidFAA registration status code V: Valid registration. All codes
N9828U Grumman American Avn. Corp.
AA-5A
Fixed-wing, single engine Individual owner
Texas
Standard 2025-03-12 ValidFAA registration status code V: Valid registration. All codes
N9892Y Champion
7GCB
Fixed-wing, single engine Individual owner
Alaska
Standard 2025-03-12 ValidFAA registration status code V: Valid registration. All codes
N2384P Piper
PA-22-150
Fixed-wing, single engine Individual owner
Oregon
Standard 2025-03-11 ValidFAA registration status code V: Valid registration. All codes
N4024Z Piper
PA-18-150
Fixed-wing, single engine Individual owner
Alaska
None on file 2025-03-11 ValidFAA registration status code V: Valid registration. All codes
N6050L American
AA-5
Fixed-wing, single engine Individual owner
Virginia
Standard 2025-03-11 ValidFAA registration status code V: Valid registration. All codes
N61RE Bellanca
7GCAA
Fixed-wing, single engine 3D Aviation LLC
Aliso Viejo, California
Standard 2025-03-11 ValidFAA registration status code V: Valid registration. All codes
N6331N Champion
7GCBC
Fixed-wing, single engine Martens Air Service LLC
North Platte, Nebraska
Standard 2025-03-11 ValidFAA registration status code V: Valid registration. All codes
N6606W Piper
PA-28-140
Fixed-wing, single engine Individual owner
Texas
Standard 2025-03-11 ValidFAA registration status code V: Valid registration. All codes
N702X Leonard Robert D
RV-6
Fixed-wing, single engine Individual owner
Kansas
Experimental 2025-03-11 ValidFAA registration status code V: Valid registration. All codes
N711CZ Wilhelmson Jack Lee
COZY
Fixed-wing, single engine Rutan Aircraft Flying Experience
Brookshire, Texas
Experimental 2025-03-11 ValidFAA registration status code V: Valid registration. All codes
N7210F Piper
PA-28-140
Fixed-wing, single engine Cedar Yopanz Flying Club LLC
Las Vegas, Nevada
Standard 2025-03-11 ValidFAA registration status code V: Valid registration. All codes
N774G Pass Joseph
TJ SPORT
Fixed-wing, single engine Individual owner
Ohio
Experimental 2025-03-11 ValidFAA registration status code V: Valid registration. All codes
N80619 Cessna
172M
Fixed-wing, single engine Level Flight Aviation LLC
Prior Lake, Minnesota
Standard 2025-03-11 ValidFAA registration status code V: Valid registration. All codes
N9557L Grumman American Avn. Corp.
AA-5
Fixed-wing, single engine Individual owner
Oklahoma
Standard 2025-03-11 ValidFAA registration status code V: Valid registration. All codes
N12097 Cessna
172M
Fixed-wing, single engine Aerolease Aviation Rental LLC
Cartersville, Georgia
Standard 2025-03-10 ValidFAA registration status code V: Valid registration. All codes
N13033 Cessna
172M
Fixed-wing, single engine Iowa Lakes Community College
Estherville, Iowa
Standard 2025-03-10 ValidFAA registration status code V: Valid registration. All codes
N1329R Grumman American Avn. Corp.
AA-5
Fixed-wing, single engine Individual owner
California
Standard 2025-03-10 ValidFAA registration status code V: Valid registration. All codes
N172CC Cessna
172L
Fixed-wing, single engine Wings Over Texas Holdings LLC
Denton, Texas
Standard 2025-03-10 ValidFAA registration status code V: Valid registration. All codes
N172NS Cessna
172K
Fixed-wing, single engine Wings Over Texas Holdings LLC
Denton, Texas
Standard 2025-03-10 ValidFAA registration status code V: Valid registration. All codes
N3397T Cessna
177
Fixed-wing, single engine Mckinney Adrian R
Mineral Wells, Texas
Standard 2025-03-10 ValidFAA registration status code V: Valid registration. All codes
N41858 Piper
PA-28-151
Fixed-wing, single engine Skybound Aviation LLC
Kernersville, North Carolina
Standard 2025-03-10 ValidFAA registration status code V: Valid registration. All codes
N56BV Gulfstream American Corp
AA-5A
Fixed-wing, single engine Euroaviation INC Trustee
Kematen,
Standard 2025-03-10 ValidFAA registration status code V: Valid registration. All codes
N6720J Piper
PA-28-140
Fixed-wing, single engine Rgi Industry INC DBA
Norman, Oklahoma
Standard 2025-03-10 ValidFAA registration status code V: Valid registration. All codes
N2314J Beech
23
Fixed-wing, single engine Ace Aviation Seminars LLC
Armuchee, Georgia
Standard 2025-03-09 ValidFAA registration status code V: Valid registration. All codes
N53817 Bellanca
7GCBC
Fixed-wing, single engine Rittberger Beef INC
Hermosa, South Dakota
Standard 2025-03-09 ValidFAA registration status code V: Valid registration. All codes
N1243S Cessna
172L
Fixed-wing, single engine Decatur Flight Center LLC
Decatur, Texas
Standard 2025-03-08 ValidFAA registration status code V: Valid registration. All codes
N2624P Piper
PA-22-150
Fixed-wing, single engine Individual owner
Alaska
Standard 2025-03-08 ValidFAA registration status code V: Valid registration. All codes
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Source: FAA Civil Aviation Registry, Releasable Aircraft Database (the engine reference table and each aircraft's engine code), October 7, 2026. Horsepower and thrust are the FAA's figures for the series, not for a particular aircraft.