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
N4822A Piper
PA-22-150
Fixed-wing, single engine Co-owned owner
Arkansas
Standard 2020-09-14 ValidFAA registration status code V: Valid registration. All codes
N7173Q Cessna
172L
Fixed-wing, single engine Westerly Av Group LLC
Westerly, Rhode Island
Standard 2020-09-14 ValidFAA registration status code V: Valid registration. All codes
N7400D Piper
PA-22-150
Fixed-wing, single engine Individual owner
Michigan
Standard 2020-09-14 ValidFAA registration status code V: Valid registration. All codes
N87269 Piper
PA-28-140
Fixed-wing, single engine Clint Aaron Aviation LLC
Columbus, Georgia
Standard 2020-09-11 ValidFAA registration status code V: Valid registration. All codes
N8727D Piper
PA-22-160
Fixed-wing, single engine Individual owner
Texas
Standard 2020-09-11 ValidFAA registration status code V: Valid registration. All codes
N4482R Cessna
172M
Fixed-wing, single engine Barxbar Aviation LLC
Mesa, Arizona
Standard 2020-09-10 ValidFAA registration status code V: Valid registration. All codes
N46514 Cessna
172K
Fixed-wing, single engine Co-owned owner
Colorado
Standard 2020-09-10 ValidFAA registration status code V: Valid registration. All codes
N5063T Piper
PA-28-140
Fixed-wing, single engine Individual owner
Minnesota
Standard 2020-09-10 ValidFAA registration status code V: Valid registration. All codes
N5994W Piper
PA-28-140
Fixed-wing, single engine Individual owner
Arkansas
Standard 2020-09-10 ValidFAA registration status code V: Valid registration. All codes
N677JF Cessna
150J
Fixed-wing, single engine Individual owner
Maine
Standard 2020-09-10 ValidFAA registration status code V: Valid registration. All codes
N999MR Russell Mark
RV-4
Fixed-wing, single engine Individual owner
Texas
Experimental 2020-09-10 ValidFAA registration status code V: Valid registration. All codes
N32198 Piper
PA-28-140
Fixed-wing, single engine Garrison Resource Development LLC
Bridgeport, Texas
Standard 2020-09-09 ValidFAA registration status code V: Valid registration. All codes
N4639V Varga Aircraft Corp.
2150A
Fixed-wing, single engine Runway 7 LLC
Lewes, Delaware
Standard 2020-09-09 ValidFAA registration status code V: Valid registration. All codes
N483AC American Champion Aircraft
7GCBC
Fixed-wing, single engine Tessos Air Service INC
Wilmington, Delaware
Standard 2020-09-09 ValidFAA registration status code V: Valid registration. All codes
N7071R Piper
PA-28-140
Fixed-wing, single engine Individual owner
Arkansas
Standard 2020-09-09 ValidFAA registration status code V: Valid registration. All codes
N734XX Cessna
172N
Fixed-wing, single engine Huerta Holdings INC
Santa Ana, California
Standard 2020-09-09 ValidFAA registration status code V: Valid registration. All codes
N7502R Piper
PA-28-140
Fixed-wing, single engine Individual owner
North Carolina
Standard 2020-09-09 ValidFAA registration status code V: Valid registration. All codes
N8689V Bellanca
7GCBC
Fixed-wing, single engine Individual owner
Alaska
Standard 2020-09-09 ValidFAA registration status code V: Valid registration. All codes
N172GR Cessna
172M
Fixed-wing, single engine N172Gr LLC
Tamarac, Florida
Standard 2020-09-08 ValidFAA registration status code V: Valid registration. All codes
N190BT Piper
PA-18-150
Fixed-wing, single engine Hitchcock Aviation LLC
Twin Falls, Idaho
Standard 2020-09-08 ValidFAA registration status code V: Valid registration. All codes
N234GM Cessna
172M
Fixed-wing, single engine Co-owned owner
California
Standard 2020-09-08 ValidFAA registration status code V: Valid registration. All codes
N44450 Piper
PA-28-140
Fixed-wing, single engine Individual owner
California
Standard 2020-09-08 ValidFAA registration status code V: Valid registration. All codes
N7269G Cessna
172K
Fixed-wing, single engine Individual owner
California
Standard 2020-09-08 ValidFAA registration status code V: Valid registration. All codes
N12123 Cessna
172M
Fixed-wing, single engine Aerospatial LLC
Selah, Washington
Standard 2020-09-04 ValidFAA registration status code V: Valid registration. All codes
N26907 Gulfstream American Corp
AA-5A
Fixed-wing, single engine Withheld at owner's request
Standard 2020-09-04 ValidFAA registration status code V: Valid registration. All codes
N5535M Aero Commander
100
Fixed-wing, single engine Individual owner
Ohio
Standard 2020-09-04 ValidFAA registration status code V: Valid registration. All codes
N6375D Cessna
172N
Fixed-wing, single engine Xin Han Aviation LLC
Atwater, California
Standard 2020-09-04 ValidFAA registration status code V: Valid registration. All codes
N7066R Piper
PA-28-140
Fixed-wing, single engine Individual owner
Texas
Standard 2020-09-04 ValidFAA registration status code V: Valid registration. All codes
N73331 Cessna
172M
Fixed-wing, single engine Individual owner
Virginia
Standard 2020-09-04 ValidFAA registration status code V: Valid registration. All codes
N739RZ Cessna
172N
Fixed-wing, single engine Flycarolina LLC
Charlotte, North Carolina
Standard 2020-09-04 ValidFAA registration status code V: Valid registration. All codes
N41562 Piper
PA-18-150
Fixed-wing, single engine Co-owned owner
California
Standard 2020-09-03 ValidFAA registration status code V: Valid registration. All codes
N4673R Piper
PA-28-140
Fixed-wing, single engine Individual owner
Washington
Standard 2020-09-03 ValidFAA registration status code V: Valid registration. All codes
N5888U Piper
PA-28-140
Fixed-wing, single engine Individual owner
New Jersey
Standard 2020-09-03 ValidFAA registration status code V: Valid registration. All codes
N65866 Cessna
172P
Fixed-wing, single engine Planenutz LLC
Deland, Florida
Standard 2020-09-03 ValidFAA registration status code V: Valid registration. All codes
N150AQ Koliber
PZL-150A
Fixed-wing, single engine Qualitair LLC Trustee
Michelstadt,
Standard 2020-09-02 ValidFAA registration status code V: Valid registration. All codes
N172BT Cessna
172K
Fixed-wing, single engine Individual owner
Massachusetts
Standard 2020-09-02 ValidFAA registration status code V: Valid registration. All codes
N4458J Piper
PA-28-140
Fixed-wing, single engine Individual owner
New Jersey
Standard 2020-09-02 ValidFAA registration status code V: Valid registration. All codes
N5127S Piper
PA-28-140
Fixed-wing, single engine Individual owner
New Jersey
Standard 2020-09-02 ValidFAA registration status code V: Valid registration. All codes
N6536W Piper
PA-28-140
Fixed-wing, single engine Co-owned owner
North Carolina
Standard 2020-09-02 ValidFAA registration status code V: Valid registration. All codes
N7297J Piper
PA-28-140
Fixed-wing, single engine Individual owner
Texas
Standard 2020-09-02 ValidFAA registration status code V: Valid registration. All codes
N7392J Piper
PA-28-140
Fixed-wing, single engine 33 Global LLC
Potomac Falls, Virginia
Standard 2020-09-02 ValidFAA registration status code V: Valid registration. All codes
N7558R Piper
PA-28-140
Fixed-wing, single engine Individual owner
West Virginia
Standard 2020-09-02 ValidFAA registration status code V: Valid registration. All codes
N8082K Piper
PA-28-161
Fixed-wing, single engine Individual owner
North Carolina
Standard 2020-09-02 ValidFAA registration status code V: Valid registration. All codes
N8413L Cessna
172I
Fixed-wing, single engine Individual owner
Maine
Standard 2020-09-02 ValidFAA registration status code V: Valid registration. All codes
N89PC Patterson Charles M
VANS RV6A
Fixed-wing, single engine Individual owner
California
Experimental 2020-09-02 ValidFAA registration status code V: Valid registration. All codes
N9901W Piper
PA-28-140
Fixed-wing, single engine Williams Air Power INC
Lowell, Michigan
Standard 2020-09-02 ValidFAA registration status code V: Valid registration. All codes
N5956E Cessna
172N
Fixed-wing, single engine Individual owner
Idaho
Restricted 2020-09-01 ValidFAA registration status code V: Valid registration. All codes
N989LE Van Arsdell Brent H
RUTAN LONG EZ
Fixed-wing, single engine Individual owner
Iowa
Experimental 2020-09-01 ValidFAA registration status code V: Valid registration. All codes
N4303Q Cessna
172L
Fixed-wing, single engine Hobart Aviation INC
Akron, Ohio
Standard 2020-08-31 ValidFAA registration status code V: Valid registration. All codes
N4388C Piper
PA-28-161
Fixed-wing, single engine Albert Lea Airport INC
Albert Lea, Minnesota
Standard 2020-08-31 ValidFAA registration status code V: Valid registration. All codes
N4391Z Piper
PA-18-150
Fixed-wing, single engine Individual owner
California
Standard 2020-08-31 ValidFAA registration status code V: Valid registration. All codes
N79062 Cessna
172K
Fixed-wing, single engine Individual owner
Washington
Standard 2020-08-31 ValidFAA registration status code V: Valid registration. All codes
N8274J Varga Aircraft Corp.
2150A
Fixed-wing, single engine Individual owner
New York
Standard 2020-08-31 ValidFAA registration status code V: Valid registration. All codes
N8452L Cessna
172I
Fixed-wing, single engine Individual owner
Illinois
Standard 2020-08-31 ValidFAA registration status code V: Valid registration. All codes
N912MD Duensing M J
RV-4
Fixed-wing, single engine Individual owner
Washington
Experimental 2020-08-31 ValidFAA registration status code V: Valid registration. All codes
N9694P Piper
PA-18-150
Fixed-wing, single engine Individual owner
Wyoming
Standard 2020-08-31 ValidFAA registration status code V: Valid registration. All codes
N5371K Cessna
172P
Fixed-wing, single engine Executive Aviation LLC
Peoria, Arizona
Standard 2020-08-29 ValidFAA registration status code V: Valid registration. All codes
N6468F Cessna
172N
Fixed-wing, single engine Flying Aces Aero Fleet INC
Guyton, Georgia
Standard 2020-08-29 ValidFAA registration status code V: Valid registration. All codes
N89594 Cessna
172P
Fixed-wing, single engine Executive Aviation LLC
Peoria, Arizona
Standard 2020-08-29 ValidFAA registration status code V: Valid registration. All codes
N9906L Cessna
172P
Fixed-wing, single engine Riseaero LLC
Florence, South Carolina
Standard 2020-08-29 ValidFAA registration status code V: Valid registration. All codes
N5550J Cessna
172N
Fixed-wing, single engine Optima Aviation LLC DBA
Lewisville, Texas
Standard 2020-08-28 ValidFAA registration status code V: Valid registration. All codes
N6WN Joe Patty
MEYERS LITTLE TOOT
Fixed-wing, single engine Individual owner
New York
Experimental 2020-08-28 ValidFAA registration status code V: Valid registration. All codes
N1731P Piper
PA-22
Fixed-wing, single engine Individual owner
California
Standard 2020-08-27 ValidFAA registration status code V: Valid registration. All codes
N5903W Piper
PA-28-150
Fixed-wing, single engine Individual owner
Idaho
Standard 2020-08-27 ValidFAA registration status code V: Valid registration. All codes
N737R Cessna
172N
Fixed-wing, single engine Individual owner
Georgia
Standard 2020-08-27 ValidFAA registration status code V: Valid registration. All codes
N4NP Cessna
172P
Fixed-wing, single engine Skywarrior Flight Training INC
Pensacola, Florida
Standard 2020-08-26 ValidFAA registration status code V: Valid registration. All codes
N51996 Cessna
172P
Fixed-wing, single engine Skywarrior Flight Training INC
Pensacola, Florida
Standard 2020-08-26 ValidFAA registration status code V: Valid registration. All codes
N52841 Cessna
172P
Fixed-wing, single engine Skywarrior Flight Training INC
Pensacola, Florida
Standard 2020-08-26 ValidFAA registration status code V: Valid registration. All codes
N5451K Cessna
172P
Fixed-wing, single engine Skywarior Flight Training INC
Pensacola, Florida
Standard 2020-08-26 ValidFAA registration status code V: Valid registration. All codes
N62354 Cessna
172P
Fixed-wing, single engine Skywarrior Flight Training INC
Pensacola, Florida
Standard 2020-08-26 ValidFAA registration status code V: Valid registration. All codes
N63450 Cessna
172P
Fixed-wing, single engine Skywarrior Flight Training INC
Pensacola, Florida
Standard 2020-08-26 ValidFAA registration status code V: Valid registration. All codes
N63715 Cessna
172P
Fixed-wing, single engine Skywarrior Flight Training INC
Pensacola, Florida
Standard 2020-08-26 ValidFAA registration status code V: Valid registration. All codes
N65704 Cessna
172P
Fixed-wing, single engine Skywarrior Flight Training INC
Pensacola, Florida
Standard 2020-08-26 ValidFAA registration status code V: Valid registration. All codes
N734HD Cessna
172N
Fixed-wing, single engine State University of New York
Farmingdale, New York
Standard 2020-08-26 ValidFAA registration status code V: Valid registration. All codes
N99347 Cessna
172P
Fixed-wing, single engine Skywarrior Flight Training INC
Pensacola, Florida
Standard 2020-08-26 ValidFAA registration status code V: Valid registration. All codes
N169GA Slingsby
T67C
Fixed-wing, single engine Cut and Snip Flyers LLC
South Weber, Utah
Experimental 2020-08-25 ValidFAA registration status code V: Valid registration. All codes
N2972Y Piper
PA-28-161
Fixed-wing, single engine Individual owner
Florida
Standard 2020-08-25 ValidFAA registration status code V: Valid registration. All codes
N4272J Piper
PA-28-140
Fixed-wing, single engine Skywagon CORP INC
Miami Springs, Florida
Standard 2020-08-25 ValidFAA registration status code V: Valid registration. All codes
N6462R Piper
PA-28-140
Fixed-wing, single engine Goodens Floorcovering INC
Tallapoosa, Georgia
Standard 2020-08-25 ValidFAA registration status code V: Valid registration. All codes
N84326 Piper
PA-28-161
Fixed-wing, single engine Individual owner
Texas
Standard 2020-08-25 ValidFAA registration status code V: Valid registration. All codes
N1592X Piper
PA-28-151
Fixed-wing, single engine N2211Z LLC
Lantana, Florida
Standard 2020-08-24 ValidFAA registration status code V: Valid registration. All codes
N1816T Piper
PA-28-140
Fixed-wing, single engine Gq Aviation LLC
Cherry Hill, New Jersey
Standard 2020-08-24 ValidFAA registration status code V: Valid registration. All codes
N1968F Cessna
172N
Fixed-wing, single engine Media Stew LLC
Carson City, Nevada
Standard 2020-08-24 ValidFAA registration status code V: Valid registration. All codes
N3661P Piper
PA-22-150
Fixed-wing, single engine Individual owner
Alaska
Standard 2020-08-24 ValidFAA registration status code V: Valid registration. All codes
N52806 Cessna
172P
Fixed-wing, single engine Skywarrior Flight Training INC
Pensacola, Florida
Standard 2020-08-24 ValidFAA registration status code V: Valid registration. All codes
N74TH Piper
PA-28-140
Fixed-wing, single engine Individual owner
Florida
Standard 2020-08-24 ValidFAA registration status code V: Valid registration. All codes
N94TS Cessna
172L
Fixed-wing, single engine Individual owner
Minnesota
Standard 2020-08-24 ValidFAA registration status code V: Valid registration. All codes
N26875 Gulfstream American Corp
AA-5A
Fixed-wing, single engine Individual owner
California
Standard 2020-08-22 ValidFAA registration status code V: Valid registration. All codes
N4858T Piper
PA-28-140
Fixed-wing, single engine Individual owner
Texas
Standard 2020-08-22 ValidFAA registration status code V: Valid registration. All codes
N7581W Piper
PA-28-180
Fixed-wing, single engine Co-owned owner
Tennessee
Standard 2020-08-22 ValidFAA registration status code V: Valid registration. All codes
N8598D Piper
PA-22-160
Fixed-wing, single engine Individual owner
Minnesota
Standard 2020-08-22 ValidFAA registration status code V: Valid registration. All codes
N1919P Piper
PA-22-150
Fixed-wing, single engine Individual owner
Texas
Standard 2020-08-21 ValidFAA registration status code V: Valid registration. All codes
N40881 Piper
PA-28-140
Fixed-wing, single engine Individual owner
New Mexico
Standard 2020-08-21 ValidFAA registration status code V: Valid registration. All codes
N410TT Robinson Helicopter
R22
Helicopter Individual owner
Washington
Standard 2020-08-21 ValidFAA registration status code V: Valid registration. All codes
N612JL Piper
PA-18-150
Fixed-wing, single engine Co-owned owner
Nebraska
Standard 2020-08-21 ValidFAA registration status code V: Valid registration. All codes
N6800H Cessna
172M
Fixed-wing, single engine Black Industries LLC
Helena, Montana
Standard 2020-08-21 ValidFAA registration status code V: Valid registration. All codes
N941D Trunk Erving A
MSP
Fixed-wing, single engine Individual owner
Texas
Experimental 2020-08-21 ValidFAA registration status code V: Valid registration. All codes
N1061E Bellanca
7GCBC
Fixed-wing, single engine Neal Foster Trucking INC
Woodland, California
Standard 2020-08-20 ValidFAA registration status code V: Valid registration. All codes
N1879P Piper
PA-18-150
Fixed-wing, single engine Wbs Coatings INC
Grand Junction, Colorado
Standard 2020-08-20 ValidFAA registration status code V: Valid registration. All codes
N6808D Rawdon
T1
Fixed-wing, single engine Co-owned owner
Washington
Restricted 2020-08-20 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.