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
N6736W Piper
PA-28-140
Fixed-wing, single engine Individual owner
Tennessee
Standard 2023-12-17 ValidFAA registration status code V: Valid registration. All codes
N72LM American
AA-5
Fixed-wing, single engine Co-owned owner
Missouri
Standard 2023-12-17 ValidFAA registration status code V: Valid registration. All codes
N73190 Cessna
172M
Fixed-wing, single engine Flying J Enterprises LLC
San Antonio, Texas
Standard 2023-12-17 ValidFAA registration status code V: Valid registration. All codes
N8162A Piper
PA-28-161
Fixed-wing, single engine Individual owner
Massachusetts
Standard 2023-12-17 ValidFAA registration status code V: Valid registration. All codes
N8294L Piper
PA-28-161
Fixed-wing, single engine Ats Tennessee INC
Oneida, Tennessee
Standard 2023-12-17 ValidFAA registration status code V: Valid registration. All codes
N32030 Piper
PA-28-151
Fixed-wing, single engine Individual owner
Wisconsin
Standard 2023-12-16 ValidFAA registration status code V: Valid registration. All codes
N47615 Piper
PA-28-161
Fixed-wing, single engine Individual owner
Texas
Standard 2023-12-16 ValidFAA registration status code V: Valid registration. All codes
N5132V Morrisey
2150A
Fixed-wing, single engine Individual owner
Pennsylvania
Standard 2023-12-16 ValidFAA registration status code V: Valid registration. All codes
N6644M Cessna
172L
Fixed-wing, single engine Sierra Lima Aviation LLC
Riverton, Utah
Standard 2023-12-16 ValidFAA registration status code V: Valid registration. All codes
N7452J Piper
PA-18-150
Fixed-wing, single engine Co-owned owner
Oregon
Standard 2023-12-16 ValidFAA registration status code V: Valid registration. All codes
N9913W Piper
PA-28-140
Fixed-wing, single engine Jcl Equipment Rental
Coleta, Illinois
Standard 2023-12-16 ValidFAA registration status code V: Valid registration. All codes
N225GA Rardin William I
GLASAIR SH-2
Fixed-wing, single engine Keh Enterprises LLC
Helena, Montana
Experimental 2023-12-15 ValidFAA registration status code V: Valid registration. All codes
N38987 Piper
PA-28-161
Fixed-wing, single engine Ocean City Flying Club LLC
Middletown, Rhode Island
Standard 2023-12-15 ValidFAA registration status code V: Valid registration. All codes
N7295Q Cessna
172L
Fixed-wing, single engine Co-owned owner
Alaska
Standard 2023-12-15 ValidFAA registration status code V: Valid registration. All codes
N7726T White William T Jr
VANS RV-4
Fixed-wing, single engine Wildwood Aerospace LLC
Cabot, Arkansas
Experimental 2023-12-15 ValidFAA registration status code V: Valid registration. All codes
N9711U Grumman American Avn. Corp.
AA-1C
Fixed-wing, single engine Dakota Ear Nose & Throat Clinic PC
Sturtevant, Wisconsin
Standard 2023-12-15 ValidFAA registration status code V: Valid registration. All codes
N12091 Cessna
172M
Fixed-wing, single engine K D Farms INC
Cosmos, Minnesota
Standard 2023-12-14 ValidFAA registration status code V: Valid registration. All codes
N18775 Beech
B19
Fixed-wing, single engine Co-owned owner
Arizona
Standard 2023-12-14 ValidFAA registration status code V: Valid registration. All codes
N236PA Piper
PA-28-161
Fixed-wing, single engine Co-owned owner
South Dakota
Standard 2023-12-14 ValidFAA registration status code V: Valid registration. All codes
N1631E Cessna
172N
Fixed-wing, single engine Skywarrior Flight Training LLC
Pensacola, Florida
Standard 2023-12-13 ValidFAA registration status code V: Valid registration. All codes
N209HV Cessna
172N
Fixed-wing, single engine Individual owner
Oregon
Standard 2023-12-13 ValidFAA registration status code V: Valid registration. All codes
N228WC Piper
PA-28-161
Fixed-wing, single engine Yard Bird Aviation LLC
Key West, Florida
Standard 2023-12-13 ValidFAA registration status code V: Valid registration. All codes
N2448P Roberts Richard C
PAZER 150
Fixed-wing, single engine Individual owner
Wisconsin
Experimental 2023-12-13 ValidFAA registration status code V: Valid registration. All codes
N2902P Piper
PA-22-150
Fixed-wing, single engine Co-owned owner
Indiana
Standard 2023-12-13 ValidFAA registration status code V: Valid registration. All codes
N32439 Piper
PA-28-151
Fixed-wing, single engine Triple R Aviation LLC
Cleburne, Texas
Standard 2023-12-13 ValidFAA registration status code V: Valid registration. All codes
N3427M Piper
PA-28-161
Fixed-wing, single engine Individual owner
California
Standard 2023-12-13 ValidFAA registration status code V: Valid registration. All codes
N44653 Piper
PA-28-140
Fixed-wing, single engine Cash Management Consulting LLC
Granite Springs, New York
Standard 2023-12-13 ValidFAA registration status code V: Valid registration. All codes
N46119 Cessna
172I
Fixed-wing, single engine Parrish Aviation Flight Academy LLC
Southlake, Texas
Standard 2023-12-13 ValidFAA registration status code V: Valid registration. All codes
N4981G Cessna
172N
Fixed-wing, single engine Individual owner
Texas
Standard 2023-12-13 ValidFAA registration status code V: Valid registration. All codes
N522JM Williams John M
STLP STRSTR II SA300
Fixed-wing, single engine Individual owner
Delaware
Experimental 2023-12-13 ValidFAA registration status code V: Valid registration. All codes
N5652E Cessna
172N
Fixed-wing, single engine Cgumps LLC
Antioch, Tennessee
Standard 2023-12-13 ValidFAA registration status code V: Valid registration. All codes
N733XZ Cessna
172N
Fixed-wing, single engine 3650 Aircraft INC
Bakersfield, California
Standard 2023-12-13 ValidFAA registration status code V: Valid registration. All codes
N1003C Piper
PA-28-140
Fixed-wing, single engine Individual owner
Montana
Standard 2023-12-12 ValidFAA registration status code V: Valid registration. All codes
N19899 Cessna
172M
Fixed-wing, single engine Fly7 LLC
Pompton Plains, New Jersey
Standard 2023-12-12 ValidFAA registration status code V: Valid registration. All codes
N5225W Piper
PA-28
Fixed-wing, single engine All the Way Up Aviation LLC
Valrico, Florida
Standard 2023-12-12 ValidFAA registration status code V: Valid registration. All codes
N79418 Cessna
172K
Fixed-wing, single engine Lee Steven W
Somerset, Kentucky
Standard 2023-12-12 ValidFAA registration status code V: Valid registration. All codes
N9685G Cessna
172N
Fixed-wing, single engine Altitude Asset Management LLC
Waukesha, Wisconsin
Standard 2023-12-12 ValidFAA registration status code V: Valid registration. All codes
N9693H Cessna
172M
Fixed-wing, single engine Clear Creek Aviation LLC
Buffalo, Wyoming
Standard 2023-12-12 ValidFAA registration status code V: Valid registration. All codes
N42756 Piper
PA-28-140
Fixed-wing, single engine Individual owner
Wisconsin
Standard 2023-12-11 ValidFAA registration status code V: Valid registration. All codes
N4301Z Piper
PA-18-150
Fixed-wing, single engine Individual owner
North Dakota
Standard 2023-12-11 ValidFAA registration status code V: Valid registration. All codes
N4511E Cessna
172N
Fixed-wing, single engine N2893E LLC
Reno, Nevada
Standard 2023-12-11 ValidFAA registration status code V: Valid registration. All codes
N5020H Cessna
172M
Fixed-wing, single engine Co-owned owner
California
Standard 2023-12-11 ValidFAA registration status code V: Valid registration. All codes
N734BV Cessna
172N
Fixed-wing, single engine Individual owner
Florida
Standard 2023-12-11 ValidFAA registration status code V: Valid registration. All codes
N73927 Cessna
172N
Fixed-wing, single engine Abcd Ventures LLC
Ada, Oklahoma
Standard 2023-12-11 ValidFAA registration status code V: Valid registration. All codes
N8290J Varga Aircraft Corp.
2150A
Fixed-wing, single engine Individual owner
North Dakota
Standard 2023-12-11 ValidFAA registration status code V: Valid registration. All codes
N84162 Cessna
172K
Fixed-wing, single engine Crosswind Aviation of Oklahoma LLC
Stillwater, Oklahoma
Standard 2023-12-11 ValidFAA registration status code V: Valid registration. All codes
N9287E Piper
PA-28-161
Fixed-wing, single engine Skyborne Airline Academy INC
Vero Beach, Florida
Standard 2023-12-11 ValidFAA registration status code V: Valid registration. All codes
N9WD Daugherty Warren F
PITTS S-1
Fixed-wing, single engine Individual owner
Wyoming
Experimental 2023-12-11 ValidFAA registration status code V: Valid registration. All codes
N20406 Cessna
172M
Fixed-wing, single engine Sp Airparts LLC
Moscow, Idaho
Standard 2023-12-10 ValidFAA registration status code V: Valid registration. All codes
N345FD Bellanca
7GCBC
Fixed-wing, single engine Golden Age Air Museum
Bethel, Pennsylvania
Standard 2023-12-10 ValidFAA registration status code V: Valid registration. All codes
N61866 Cessna
172M
Fixed-wing, single engine Wings Over Texas Holdings LLC
Denton, Texas
Standard 2023-12-10 ValidFAA registration status code V: Valid registration. All codes
N6352S Stuart Lane
6S1
Fixed-wing, single engine Individual owner
Missouri
Experimental 2023-12-10 ValidFAA registration status code V: Valid registration. All codes
N6475D Cessna
172N
Fixed-wing, single engine Darcy Aviation LLC
Danbury, Connecticut
Standard 2023-12-10 ValidFAA registration status code V: Valid registration. All codes
N918MB Bauer John M
VANS RV6
Fixed-wing, single engine Live More LLC
Fort Worth, Texas
Experimental 2023-12-10 ValidFAA registration status code V: Valid registration. All codes
N13327 Cessna
172M
Fixed-wing, single engine Individual owner
Indiana
Standard 2023-12-09 ValidFAA registration status code V: Valid registration. All codes
N32543 Piper
PA-28-151
Fixed-wing, single engine Echo 7 Tango Aviation LLC
Pottsboro, Texas
Standard 2023-12-09 ValidFAA registration status code V: Valid registration. All codes
N518E Mustang
TWO
Fixed-wing, single engine Individual owner
Indiana
Experimental 2023-12-09 ValidFAA registration status code V: Valid registration. All codes
N5744W Piper
PA-28-160
Fixed-wing, single engine Individual owner
North Carolina
Standard 2023-12-09 ValidFAA registration status code V: Valid registration. All codes
N6380D Cessna
172N
Fixed-wing, single engine Co-owned owner
Kentucky
Standard 2023-12-09 ValidFAA registration status code V: Valid registration. All codes
N7189L Grumman American Avn. Corp.
AA-5
Fixed-wing, single engine Individual owner
Colorado
Standard 2023-12-09 ValidFAA registration status code V: Valid registration. All codes
N8234F Piper
PA-28-161
Fixed-wing, single engine Individual owner
Georgia
Standard 2023-12-09 ValidFAA registration status code V: Valid registration. All codes
N8445R Piper
PA-28-140
Fixed-wing, single engine Takeoff Power Aviation and Media Solutions INC
San Juan, Puerto Rico
Standard 2023-12-09 ValidFAA registration status code V: Valid registration. All codes
N8619D Piper
PA-22-160
Fixed-wing, single engine Individual owner
Wisconsin
Standard 2023-12-09 ValidFAA registration status code V: Valid registration. All codes
N1166P Piper
PA-23
Fixed-wing, multi-engine Delaware Aircraft Trust LLC Trustee
New Castle, Delaware
Standard 2023-12-08 ValidFAA registration status code V: Valid registration. All codes
N2513P Piper
PA-22-150
Fixed-wing, single engine Individual owner
Texas
Standard 2023-12-08 ValidFAA registration status code V: Valid registration. All codes
N3173E Cessna
172N
Fixed-wing, single engine Skywarrior Flight Training LLC
Pensacola, Florida
Standard 2023-12-08 ValidFAA registration status code V: Valid registration. All codes
N50941 Cessna
172M
Fixed-wing, single engine Co-owned owner
California
Standard 2023-12-08 ValidFAA registration status code V: Valid registration. All codes
N737UR Cessna
172N
Fixed-wing, single engine Sky Warrior Flight Training LLC
Pensacola, Florida
Standard 2023-12-08 ValidFAA registration status code V: Valid registration. All codes
N79513 Cessna
172K
Fixed-wing, single engine Kalman Engineering INC
Pekin, Illinois
Standard 2023-12-08 ValidFAA registration status code V: Valid registration. All codes
N9725Q Cessna
172M
Fixed-wing, single engine Wings Over Texas Holdings LLC
Denton, Texas
Standard 2023-12-08 ValidFAA registration status code V: Valid registration. All codes
N1417V Cessna
172M
Fixed-wing, single engine Skyhawk Aviation LLC
Rutherfordton, North Carolina
Standard 2023-12-07 ValidFAA registration status code V: Valid registration. All codes
N30803 Merritt Glendon Lee
ACRO SPORT II
Fixed-wing, single engine Vampire Aviation LLC
Wilmington, Delaware
Experimental 2023-12-07 ValidFAA registration status code V: Valid registration. All codes
N527FL Piper
PA-28-140
Fixed-wing, single engine Co-owned owner
Texas
Standard 2023-12-07 ValidFAA registration status code V: Valid registration. All codes
N5945W Piper
PA-28-150
Fixed-wing, single engine Co-owned owner
California
Standard 2023-12-07 ValidFAA registration status code V: Valid registration. All codes
N6362R Piper
PA-28-140
Fixed-wing, single engine Individual owner
Arizona
Standard 2023-12-07 ValidFAA registration status code V: Valid registration. All codes
N64329 Cessna
172M
Fixed-wing, single engine Bvs Aviation LLC
Burns, Oregon
Standard 2023-12-07 ValidFAA registration status code V: Valid registration. All codes
N8023D Piper
PA-22-150
Fixed-wing, single engine Individual owner
North Carolina
Multiple 2023-12-07 ValidFAA registration status code V: Valid registration. All codes
N9721W Piper
PA-28-140
Fixed-wing, single engine Individual owner
Pennsylvania
Standard 2023-12-07 ValidFAA registration status code V: Valid registration. All codes
N1829P Piper
PA-22-150
Fixed-wing, single engine Boll Ryan C
Sheboygan, Wisconsin
Standard 2023-12-06 ValidFAA registration status code V: Valid registration. All codes
N2376L Beech
23
Fixed-wing, single engine Rbg Aviation LLC
Middleburg, Florida
Standard 2023-12-06 ValidFAA registration status code V: Valid registration. All codes
N28361 Piper
PA-28-161
Fixed-wing, single engine Propell Air LLC
Deridder, Louisiana
Standard 2023-12-06 ValidFAA registration status code V: Valid registration. All codes
N3904P Piper
PA-22-150
Fixed-wing, single engine Individual owner
Washington
Standard 2023-12-06 ValidFAA registration status code V: Valid registration. All codes
N3YS Shelton Walter L
RV-4
Fixed-wing, single engine Individual owner
Texas
Experimental 2023-12-06 ValidFAA registration status code V: Valid registration. All codes
N5152Q Cessna
172M
Fixed-wing, single engine B & L Property Holdings LLC
Brush Prairie, Washington
Standard 2023-12-06 ValidFAA registration status code V: Valid registration. All codes
N53JP Payne John D
MARQUART MA5 CHARGER
Fixed-wing, single engine Individual owner
Washington
Experimental 2023-12-06 ValidFAA registration status code V: Valid registration. All codes
N55844 Piper
PA-28-140
Fixed-wing, single engine Individual owner
Pennsylvania
Standard 2023-12-06 ValidFAA registration status code V: Valid registration. All codes
N7304G Cessna
172K
Fixed-wing, single engine Individual owner
West Virginia
Standard 2023-12-06 ValidFAA registration status code V: Valid registration. All codes
N737HE Cessna
172N
Fixed-wing, single engine Laurel Highlands Aeronautical Academy
Latrobe, Pennsylvania
Standard 2023-12-06 ValidFAA registration status code V: Valid registration. All codes
N79949 Cessna
172K
Fixed-wing, single engine Sna Aviation INC
Charlotte, North Carolina
Standard 2023-12-06 ValidFAA registration status code V: Valid registration. All codes
N8081C Piper
PA-18A-135
Fixed-wing, single engine Individual owner
Alaska
Multiple 2023-12-06 ValidFAA registration status code V: Valid registration. All codes
N8964V Cessna
172M
Fixed-wing, single engine Co-owned owner
California
Standard 2023-12-06 ValidFAA registration status code V: Valid registration. All codes
N970LC Piper
PA-28-161
Fixed-wing, single engine Majeste Air LLC
Loveland, Colorado
Standard 2023-12-06 ValidFAA registration status code V: Valid registration. All codes
N9836D Piper
PA-22-160
Fixed-wing, single engine Individual owner
New Jersey
Standard 2023-12-06 ValidFAA registration status code V: Valid registration. All codes
N13445 Cessna
172M
Fixed-wing, single engine Laurel Highlands Aeronautical Academy
Latrobe, Pennsylvania
Standard 2023-12-05 ValidFAA registration status code V: Valid registration. All codes
N20177 Cessna
172M
Fixed-wing, single engine Nashville Flight School LLC
Nashville, Tennessee
Standard 2023-12-05 ValidFAA registration status code V: Valid registration. All codes
N20310 Cessna
172M
Fixed-wing, single engine Nine G Aviation LLC
Holdrege, Nebraska
Standard 2023-12-05 ValidFAA registration status code V: Valid registration. All codes
N228TM Cessna
172N
Fixed-wing, single engine Macs Seaplane Service LLC
Milan, Indiana
Standard 2023-12-05 ValidFAA registration status code V: Valid registration. All codes
N35377 Cessna
172I
Fixed-wing, single engine Laurel Highlands Aeronautical Academy
Latrobe, Pennsylvania
Standard 2023-12-05 ValidFAA registration status code V: Valid registration. All codes
N4229T Piper
PA-28-140
Fixed-wing, single engine Individual owner
Texas
Standard 2023-12-05 ValidFAA registration status code V: Valid registration. All codes
N5540U Piper
PA-28-140
Fixed-wing, single engine Individual owner
Tennessee
Standard 2023-12-05 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 8, 2026. Horsepower and thrust are the FAA's figures for the series, not for a particular aircraft.