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
N903NS Cessna
172M
Fixed-wing, single engine American Patrols INC
Midland, Texas
Standard 2024-02-21 ValidFAA registration status code V: Valid registration. All codes
N2240K Piper
PA-28-161
Fixed-wing, single engine Individual owner
Alabama
Standard 2024-02-20 ValidFAA registration status code V: Valid registration. All codes
N2296Z Piper
PA-28-161
Fixed-wing, single engine Individual owner
Michigan
Standard 2024-02-20 ValidFAA registration status code V: Valid registration. All codes
N29307 Cessna
177
Fixed-wing, single engine Co-owned owner
Minnesota
Standard 2024-02-19 ValidFAA registration status code V: Valid registration. All codes
N36395 Piper
PA-28-161
Fixed-wing, single engine Brittle Aviation LLC
Chapel Hill, North Carolina
Standard 2024-02-19 ValidFAA registration status code V: Valid registration. All codes
N3819P Piper
PA-22-150
Fixed-wing, single engine Individual owner
California
Standard 2024-02-19 ValidFAA registration status code V: Valid registration. All codes
N414BC Piper
PA-28-140
Fixed-wing, single engine Individual owner
Arizona
Standard 2024-02-19 ValidFAA registration status code V: Valid registration. All codes
N5654V Piper
PA-28-161
Fixed-wing, single engine Individual owner
Texas
Standard 2024-02-19 ValidFAA registration status code V: Valid registration. All codes
N9302S Beech
B19
Fixed-wing, single engine Individual owner
North Carolina
Standard 2024-02-19 ValidFAA registration status code V: Valid registration. All codes
N951AN American
AA-5
Fixed-wing, single engine North Branch Aviation LLC
Fort Worth, Texas
Standard 2024-02-19 ValidFAA registration status code V: Valid registration. All codes
N1969K Cessna
172K
Fixed-wing, single engine
Standard 2024-02-18 ValidFAA registration status code V: Valid registration. All codes
N2126J Mcdonald Howard C
MAC SUPER CUBY
Fixed-wing, single engine Individual owner
Colorado
Experimental 2024-02-18 ValidFAA registration status code V: Valid registration. All codes
N2802Z Piper
PA-22-150
Fixed-wing, single engine Individual owner
South Carolina
Standard 2024-02-18 ValidFAA registration status code V: Valid registration. All codes
N29592 Cessna
177
Fixed-wing, single engine Individual owner
Texas
Standard 2024-02-18 ValidFAA registration status code V: Valid registration. All codes
N5417W Piper
PA-28-160
Fixed-wing, single engine Crystal Lake Air LLC
Lake Geneva, Florida
Standard 2024-02-18 ValidFAA registration status code V: Valid registration. All codes
N5516F Piper
PA-28-140
Fixed-wing, single engine Individual owner
Alabama
Standard 2024-02-18 ValidFAA registration status code V: Valid registration. All codes
N80816 Cessna
172M
Fixed-wing, single engine Laurel Highlands Aeronautical Academy
Latrobe, Pennsylvania
Standard 2024-02-18 ValidFAA registration status code V: Valid registration. All codes
N6664W Piper
PA-28-140
Fixed-wing, single engine N6664W LLC
Grand Prairie, Texas
Standard 2024-02-17 ValidFAA registration status code V: Valid registration. All codes
N734SW Cessna
172N
Fixed-wing, single engine Sierra Sky Aviation LLC
Kalispell, Montana
Standard 2024-02-17 ValidFAA registration status code V: Valid registration. All codes
N99948 Cessna
172P
Fixed-wing, single engine Florida State College At Jacksonville
Jacksonville, Florida
Standard 2024-02-17 ValidFAA registration status code V: Valid registration. All codes
N239SF American Champion Aircraft
7GCAA
Fixed-wing, single engine Luke Skywalker 23 LLC
Los Altos, California
Standard 2024-02-16 ValidFAA registration status code V: Valid registration. All codes
N347WG Cessna
172I
Fixed-wing, single engine Mt Aircraft LLC
Port Orange, Florida
Standard 2024-02-16 ValidFAA registration status code V: Valid registration. All codes
N3748P Piper
PA-22-150
Fixed-wing, single engine Individual owner
Texas
Standard 2024-02-16 ValidFAA registration status code V: Valid registration. All codes
N4099E Piper
PA-18-150
Fixed-wing, single engine Individual owner
Alaska
Standard 2024-02-16 ValidFAA registration status code V: Valid registration. All codes
N54410 Piper
PA-28-151
Fixed-wing, single engine Law Aircraft LLC
Oak Grove, Minnesota
Standard 2024-02-16 ValidFAA registration status code V: Valid registration. All codes
N7080Q Cessna
172L
Fixed-wing, single engine Individual owner
Washington
Standard 2024-02-16 ValidFAA registration status code V: Valid registration. All codes
N90CA Bellanca
7GCBC
Fixed-wing, single engine Blue Max Aviation LLC
El Cajon, California
Standard 2024-02-16 ValidFAA registration status code V: Valid registration. All codes
N3593Q Cessna
172M
Fixed-wing, single engine Individual owner
Ohio
Standard 2024-02-15 ValidFAA registration status code V: Valid registration. All codes
N555NA Piper
PA-28-151
Fixed-wing, single engine We Warrior Three LLC
Paragould, Arkansas
Standard 2024-02-15 ValidFAA registration status code V: Valid registration. All codes
N7608F Cessna
172N
Fixed-wing, single engine Aj Mush LLC
Dearborn, Michigan
Standard 2024-02-15 ValidFAA registration status code V: Valid registration. All codes
N7770B Piper
PA-28-151
Fixed-wing, single engine Co-owned owner
New York
Standard 2024-02-15 ValidFAA registration status code V: Valid registration. All codes
N845BC American Champion Aircraft
7GCBC
Fixed-wing, single engine Individual owner
Idaho
Standard 2024-02-15 ValidFAA registration status code V: Valid registration. All codes
N664TJ Simard Thomas F
SIMARD GLASAIR
Fixed-wing, single engine Individual owner
New Mexico
Experimental 2024-02-14 ValidFAA registration status code V: Valid registration. All codes
N80335 Cessna
172M
Fixed-wing, single engine Rawareo LLC
Warsaw, Missouri
Standard 2024-02-14 ValidFAA registration status code V: Valid registration. All codes
N121BB Piper
PA-18-150
Fixed-wing, single engine Individual owner
New Jersey
Multiple 2024-02-13 ValidFAA registration status code V: Valid registration. All codes
N141SC American Champion Aircraft
7GCBC
Fixed-wing, single engine Co-owned owner
Texas
Standard 2024-02-13 ValidFAA registration status code V: Valid registration. All codes
N206CB Piper
PA-28-140
Fixed-wing, single engine Individual owner
Colorado
Standard 2024-02-13 ValidFAA registration status code V: Valid registration. All codes
N22607 Gauthier Joseph J E
CW-SPCL
Fixed-wing, single engine Individual owner
Florida
Experimental 2024-02-13 ValidFAA registration status code V: Valid registration. All codes
N2372J Beech
23
Fixed-wing, single engine Sea Serpent Tours INC
Saint Augustine, Florida
Standard 2024-02-13 ValidFAA registration status code V: Valid registration. All codes
N3762P Piper
PA-22-150
Fixed-wing, single engine Individual owner
Arkansas
Standard 2024-02-13 ValidFAA registration status code V: Valid registration. All codes
N56809 Piper
PA-28-140
Fixed-wing, single engine Individual owner
Arizona
Standard 2024-02-13 ValidFAA registration status code V: Valid registration. All codes
N5786U Piper
PA-28-140
Fixed-wing, single engine Individual owner
Colorado
Standard 2024-02-13 ValidFAA registration status code V: Valid registration. All codes
N5886H Piper
PA-16
Fixed-wing, single engine 86H LLC
Burlington, Vermont
Standard 2024-02-13 ValidFAA registration status code V: Valid registration. All codes
N5986U Piper
PA-28-140
Fixed-wing, single engine Individual owner
Texas
Standard 2024-02-13 ValidFAA registration status code V: Valid registration. All codes
N611CA Cessna
172N
Fixed-wing, single engine Individual owner
Colorado
Standard 2024-02-13 ValidFAA registration status code V: Valid registration. All codes
N61536 Cessna
172M
Fixed-wing, single engine Aerolanding LLC
Enterprise, Alabama
Standard 2024-02-13 ValidFAA registration status code V: Valid registration. All codes
N739GF Cessna
172N
Fixed-wing, single engine Individual owner
Minnesota
Standard 2024-02-13 ValidFAA registration status code V: Valid registration. All codes
N8224K Piper
PA-28-161
Fixed-wing, single engine Individual owner
California
Standard 2024-02-13 ValidFAA registration status code V: Valid registration. All codes
N88VL Lemen William T
HATZ CB-1
Fixed-wing, single engine Individual owner
Indiana
Experimental 2024-02-13 ValidFAA registration status code V: Valid registration. All codes
N90945 Piper
PA-18-150
Fixed-wing, single engine Co-owned owner
Alaska
Restricted 2024-02-13 ValidFAA registration status code V: Valid registration. All codes
N926MK Piper
PA-28-140
Fixed-wing, single engine Individual owner
West Virginia
Standard 2024-02-13 ValidFAA registration status code V: Valid registration. All codes
N98136 Piper
PA-28-140
Fixed-wing, single engine Individual owner
Florida
Standard 2024-02-13 ValidFAA registration status code V: Valid registration. All codes
N501MP Cessna
172N
Fixed-wing, single engine Individual owner
California
Standard 2024-02-12 ValidFAA registration status code V: Valid registration. All codes
N6317D Cessna
172N
Fixed-wing, single engine Jkg LLC
Murfreesboro, Tennessee
Standard 2024-02-12 ValidFAA registration status code V: Valid registration. All codes
N6871W Piper
PA-28-140
Fixed-wing, single engine Skylux Aviation LLC
Coppell, Texas
Standard 2024-02-12 ValidFAA registration status code V: Valid registration. All codes
N7140L Grumman American Avn. Corp.
AA-5
Fixed-wing, single engine K Anthony Lax Aviation LLC
Mount Pleasant, South Carolina
Standard 2024-02-12 ValidFAA registration status code V: Valid registration. All codes
N7730C Piper
PA-28-151
Fixed-wing, single engine Bug'Z Land Clearing LLC
Pensacola, Florida
Standard 2024-02-12 ValidFAA registration status code V: Valid registration. All codes
N8708D Piper
PA-22-150
Fixed-wing, single engine Co-owned owner
Ohio
Standard 2024-02-12 ValidFAA registration status code V: Valid registration. All codes
N9853J Cessna
172N
Fixed-wing, single engine Eastern Kentucky University Center for Aviation
Richmond, Kentucky
Standard 2024-02-12 ValidFAA registration status code V: Valid registration. All codes
N374SD Piper
PA-18-150
Fixed-wing, single engine Individual owner
Utah
Standard 2024-02-11 ValidFAA registration status code V: Valid registration. All codes
N737PJ Cessna
172N
Fixed-wing, single engine Chawilder LLC
Chattanooga, Tennessee
Standard 2024-02-11 ValidFAA registration status code V: Valid registration. All codes
N9017D Piper
PA-22-160
Fixed-wing, single engine Individual owner
Texas
Standard 2024-02-11 ValidFAA registration status code V: Valid registration. All codes
N4642R Piper
PA-28-140
Fixed-wing, single engine Skyways Group LLC
Greensboro, North Carolina
Standard 2024-02-10 ValidFAA registration status code V: Valid registration. All codes
N9264F Beech
23
Fixed-wing, single engine Individual owner
Mississippi
Standard 2024-02-10 ValidFAA registration status code V: Valid registration. All codes
N4398J Piper
PA-28-140
Fixed-wing, single engine Individual owner
California
Standard 2024-02-09 ValidFAA registration status code V: Valid registration. All codes
N5779F Piper
PA-28-140
Fixed-wing, single engine Co-owned owner
Delaware
Standard 2024-02-09 ValidFAA registration status code V: Valid registration. All codes
N83BE Piper
PA-28-140
Fixed-wing, single engine Individual owner
Maryland
Standard 2024-02-09 ValidFAA registration status code V: Valid registration. All codes
N95217 Piper
PA-28-140
Fixed-wing, single engine Individual owner
Tennessee
Standard 2024-02-09 ValidFAA registration status code V: Valid registration. All codes
N16JP Piper
PA-28-140
Fixed-wing, single engine True Grit Wy 2 DBA
Rozet, Wyoming
Standard 2024-02-08 ValidFAA registration status code V: Valid registration. All codes
N1972E Cessna
172N
Fixed-wing, single engine Individual owner
West Virginia
Standard 2024-02-08 ValidFAA registration status code V: Valid registration. All codes
N214AC American Champion Aircraft
7GCBC
Fixed-wing, single engine Individual owner
Minnesota
Standard 2024-02-08 ValidFAA registration status code V: Valid registration. All codes
N2819X Cessna
177
Fixed-wing, single engine Individual owner
Arizona
Standard 2024-02-08 ValidFAA registration status code V: Valid registration. All codes
N3915Z Piper
PA-18-150
Fixed-wing, single engine High Exposure INC
Wilmington, Delaware
Standard 2024-02-08 ValidFAA registration status code V: Valid registration. All codes
N5387K Cessna
172P
Fixed-wing, single engine N5387K LLC
Carthage, North Carolina
Standard 2024-02-08 ValidFAA registration status code V: Valid registration. All codes
N7095R Piper
PA-28-140
Fixed-wing, single engine Stevens Aircraft LLC
Morehead, Kentucky
Standard 2024-02-08 ValidFAA registration status code V: Valid registration. All codes
N737VC Cessna
172N
Fixed-wing, single engine N737Vc LLC
Wilmington, Delaware
Standard 2024-02-08 ValidFAA registration status code V: Valid registration. All codes
N738CN Cessna
172N
Fixed-wing, single engine N738Cn LLC
Wilmington, Delaware
Standard 2024-02-08 ValidFAA registration status code V: Valid registration. All codes
N784CM Morganti Charles
GLASAIR
Fixed-wing, single engine East Texas Aircraft Engines LLC
Palestine, Texas
Experimental 2024-02-08 ValidFAA registration status code V: Valid registration. All codes
N80975 Cessna
172M
Fixed-wing, single engine N80975 LLC
Wilmington, Delaware
Standard 2024-02-08 ValidFAA registration status code V: Valid registration. All codes
N8194J Piper
PA-28-161
Fixed-wing, single engine Tipton Aero Shares LLC
Fort Meade, Maryland
Standard 2024-02-08 ValidFAA registration status code V: Valid registration. All codes
N8978D Piper
PA-18-150
Fixed-wing, single engine Co-owned owner
Alaska
Multiple 2024-02-08 ValidFAA registration status code V: Valid registration. All codes
N9622C Piper
PA-28-161
Fixed-wing, single engine N9622C LLC
Clintondale, New York
Standard 2024-02-08 ValidFAA registration status code V: Valid registration. All codes
N14NR Piper
PA-28-140
Fixed-wing, single engine Piper Capital Investments LLC
Denton, Texas
Standard 2024-02-07 ValidFAA registration status code V: Valid registration. All codes
N35799 Cessna
172I
Fixed-wing, single engine Huebner Otto
Bolingbrook, Illinois
Standard 2024-02-07 ValidFAA registration status code V: Valid registration. All codes
N3713K Piper
PA-28-140
Fixed-wing, single engine 3713 Kilo LLC
Athens, Georgia
Standard 2024-02-07 ValidFAA registration status code V: Valid registration. All codes
N5394W Piper
PA-28-160
Fixed-wing, single engine Individual owner
Arizona
Standard 2024-02-07 ValidFAA registration status code V: Valid registration. All codes
N5773U Piper
PA-28-140
Fixed-wing, single engine Individual owner
Virginia
Standard 2024-02-07 ValidFAA registration status code V: Valid registration. All codes
N6416R Piper
PA-28-140
Fixed-wing, single engine National Aviation Academy of Mississippi INC
Clearwater, Florida
Standard 2024-02-07 ValidFAA registration status code V: Valid registration. All codes
N6760B Piper
PA-18A
Fixed-wing, single engine Co-owned owner
Alaska
Standard 2024-02-07 ValidFAA registration status code V: Valid registration. All codes
N739MR Cessna
172N
Fixed-wing, single engine Eagle Simulator LLC
Lake Oswego, Oregon
Standard 2024-02-07 ValidFAA registration status code V: Valid registration. All codes
N91834 Piper
PA-28-161
Fixed-wing, single engine Skylink Xpress INC
San Bernardino, California
Standard 2024-02-07 ValidFAA registration status code V: Valid registration. All codes
N1108X Piper
PA-28-151
Fixed-wing, single engine Individual owner
Kansas
Standard 2024-02-06 ValidFAA registration status code V: Valid registration. All codes
N4201J Piper
PA-28-140
Fixed-wing, single engine Individual owner
California
Standard 2024-02-06 ValidFAA registration status code V: Valid registration. All codes
N5497L Grumman American Avn. Corp.
AA-5
Fixed-wing, single engine Individual owner
California
Standard 2024-02-06 ValidFAA registration status code V: Valid registration. All codes
N6083L Grumman American Avn. Corp.
AA-5
Fixed-wing, single engine Co-owned owner
New Mexico
Standard 2024-02-06 ValidFAA registration status code V: Valid registration. All codes
N725BK Cessna
172L
Fixed-wing, single engine American Patrols INC
Midland, Texas
Standard 2024-02-06 ValidFAA registration status code V: Valid registration. All codes
N775MC Cessna
172M
Fixed-wing, single engine American Patrols INC
Midland, Texas
Standard 2024-02-06 ValidFAA registration status code V: Valid registration. All codes
N20243 Cessna
172M
Fixed-wing, single engine Individual owner
West Virginia
Standard 2024-02-05 ValidFAA registration status code V: Valid registration. All codes
N5583F Piper
PA-28-140
Fixed-wing, single engine Aiken Pilot Training LLC
Johnston, South Carolina
Standard 2024-02-05 ValidFAA registration status code V: Valid registration. All codes
N6892W Piper
PA-28-140
Fixed-wing, single engine Individual owner
North Carolina
Standard 2024-02-05 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.