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
N12KB Cessna
172M
Fixed-wing, single engine Wings Over Texas Holdings LLC
Denton, Texas
Standard 2023-02-03 ValidFAA registration status code V: Valid registration. All codes
N3070P Piper
PA-23
Fixed-wing, multi-engine Individual owner
New Hampshire
Standard 2023-02-03 ValidFAA registration status code V: Valid registration. All codes
N5143W Piper
PA-28
Fixed-wing, single engine Individual owner
New Hampshire
Standard 2023-02-03 ValidFAA registration status code V: Valid registration. All codes
N568WA Piper
PA-28-140
Fixed-wing, single engine Individual owner
Florida
Standard 2023-02-03 ValidFAA registration status code V: Valid registration. All codes
N738ZC Cessna
172N
Fixed-wing, single engine N738Zc LLC
Tallahassee, Florida
Standard 2023-02-03 ValidFAA registration status code V: Valid registration. All codes
N747LP Cessna
172L
Fixed-wing, single engine Simplifly LLC
Mesa, Arizona
Standard 2023-02-03 ValidFAA registration status code V: Valid registration. All codes
N85FT Simpson William S
THORP T-18
Fixed-wing, single engine Individual owner
Illinois
Experimental 2023-02-03 ValidFAA registration status code V: Valid registration. All codes
N20279 Cessna
172M
Fixed-wing, single engine Individual owner
Puerto Rico
Standard 2023-02-02 ValidFAA registration status code V: Valid registration. All codes
N2390Q Beech
23
Fixed-wing, single engine Individual owner
Indiana
Standard 2023-02-02 ValidFAA registration status code V: Valid registration. All codes
N3268T Cessna
177
Fixed-wing, single engine Individual owner
Texas
Standard 2023-02-02 ValidFAA registration status code V: Valid registration. All codes
N35638 Cessna
172I
Fixed-wing, single engine Individual owner
Florida
Standard 2023-02-02 ValidFAA registration status code V: Valid registration. All codes
N4084E Piper
PA-18-150
Fixed-wing, single engine Individual owner
Texas
Standard 2023-02-02 ValidFAA registration status code V: Valid registration. All codes
N5985Z Piper
PA-18-150
Fixed-wing, single engine Individual owner
Alaska
Multiple 2023-02-02 ValidFAA registration status code V: Valid registration. All codes
N9867W Piper
PA-28-140
Fixed-wing, single engine Individual owner
Ohio
Standard 2023-02-02 ValidFAA registration status code V: Valid registration. All codes
N13524 Cessna
172M
Fixed-wing, single engine Loomis Avaition LLC
Columbus, Ohio
Standard 2023-02-01 ValidFAA registration status code V: Valid registration. All codes
N1696T Piper
PA-28-140
Fixed-wing, single engine Aircraft 1821 LLC
North Charleston, South Carolina
Standard 2023-02-01 ValidFAA registration status code V: Valid registration. All codes
N2361Q Piper
PA-28-161
Fixed-wing, single engine Individual owner
Indiana
Standard 2023-02-01 ValidFAA registration status code V: Valid registration. All codes
N24BM Brown Michael A
VAN'S RV-4
Fixed-wing, single engine Individual owner
Maryland
Experimental 2023-02-01 ValidFAA registration status code V: Valid registration. All codes
N3252T Cessna
177
Fixed-wing, single engine Individual owner
California
Standard 2023-02-01 ValidFAA registration status code V: Valid registration. All codes
N3700K Piper
PA-28-140
Fixed-wing, single engine Individual owner
Tennessee
Standard 2023-02-01 ValidFAA registration status code V: Valid registration. All codes
N5573W Piper
PA-28-160
Fixed-wing, single engine Individual owner
Minnesota
Standard 2023-02-01 ValidFAA registration status code V: Valid registration. All codes
N6009D Piper
PA-22-150
Fixed-wing, single engine Individual owner
Texas
Standard 2023-02-01 ValidFAA registration status code V: Valid registration. All codes
N819JB Piper
PA-22-150
Fixed-wing, single engine Individual owner
Texas
Standard 2023-02-01 ValidFAA registration status code V: Valid registration. All codes
N91862 Cessna
172M
Fixed-wing, single engine Aire Services LLC
Barrigada, Guam
Standard 2023-02-01 ValidFAA registration status code V: Valid registration. All codes
N9305K Piper
PA-28-140
Fixed-wing, single engine Hitech Aerospace CORP
New York, New York
Standard 2023-02-01 ValidFAA registration status code V: Valid registration. All codes
N935PT Cessna
172M
Fixed-wing, single engine Tailspin Tommys INC
Port Townsend, Washington
Standard 2023-02-01 ValidFAA registration status code V: Valid registration. All codes
N9445K Piper
PA-28-151
Fixed-wing, single engine Aishvaryam LLC DBA
Lancaster, Texas
Standard 2023-02-01 ValidFAA registration status code V: Valid registration. All codes
N9910Y Champion
7AC
Fixed-wing, single engine Individual owner
Minnesota
Standard 2023-02-01 ValidFAA registration status code V: Valid registration. All codes
N12DP Pfundheller
STARDUSTER TOO SA300
Fixed-wing, single engine Individual owner
Michigan
Experimental 2023-01-31 ValidFAA registration status code V: Valid registration. All codes
N143HP Aviat Aircraft Inc
A-1B
Fixed-wing, single engine Dans Aircraft Repair LLC
Gardiner, Montana
Standard 2023-01-31 ValidFAA registration status code V: Valid registration. All codes
N2019E Cessna
172N
Fixed-wing, single engine Individual owner
Texas
Standard 2023-01-31 ValidFAA registration status code V: Valid registration. All codes
N3920Z Piper
PA-18-150
Fixed-wing, single engine Co-owned owner
Idaho
Multiple 2023-01-31 ValidFAA registration status code V: Valid registration. All codes
N43671 Piper
PA-28-151
Fixed-wing, single engine Rush Micah N
Salem, Oregon
Standard 2023-01-31 ValidFAA registration status code V: Valid registration. All codes
N4550E Cessna
172N
Fixed-wing, single engine Pommy & Swede LLC
Valentine, Nebraska
Standard 2023-01-31 ValidFAA registration status code V: Valid registration. All codes
N8989X Devin Sirois
SUPER CUB EXP
Fixed-wing, single engine Cascadia Aircraft LLC
Sandpoint, Idaho
Experimental 2023-01-31 ValidFAA registration status code V: Valid registration. All codes
N3098Z Piper
PA-18-150
Fixed-wing, single engine Individual owner
Alaska
Multiple 2023-01-30 ValidFAA registration status code V: Valid registration. All codes
N4375F Piper
PA-28-140
Fixed-wing, single engine Wings Aero LLC
Zeeland, Michigan
Standard 2023-01-30 ValidFAA registration status code V: Valid registration. All codes
N5203R Cessna
172M
Fixed-wing, single engine Individual owner
Alabama
Standard 2023-01-30 ValidFAA registration status code V: Valid registration. All codes
N5415F Piper
PA-28-151
Fixed-wing, single engine Individual owner
Texas
Standard 2023-01-30 ValidFAA registration status code V: Valid registration. All codes
N5822U Piper
PA-28-140
Fixed-wing, single engine Individual owner
Massachusetts
Standard 2023-01-30 ValidFAA registration status code V: Valid registration. All codes
N6537F Cessna
172N
Fixed-wing, single engine Wheels Up Aviation LLC
Pittsburgh, Pennsylvania
Standard 2023-01-30 ValidFAA registration status code V: Valid registration. All codes
N7085G Cessna
172K
Fixed-wing, single engine
Standard 2023-01-30 ValidFAA registration status code V: Valid registration. All codes
N738TG Cessna
172N
Fixed-wing, single engine Wings Aero LLC
Zeeland, Michigan
Standard 2023-01-30 ValidFAA registration status code V: Valid registration. All codes
N8115P Piper
PA-28-161
Fixed-wing, single engine Jla Aero LLC
State College, Pennsylvania
Standard 2023-01-29 ValidFAA registration status code V: Valid registration. All codes
N1045J Husted Dean
SPORT TRAINER
Fixed-wing, single engine Individual owner
Kansas
Experimental 2023-01-28 ValidFAA registration status code V: Valid registration. All codes
N155CW Cessna
172M
Fixed-wing, single engine Potcake Aviation LLC
Mcminnville, Oregon
Standard 2023-01-28 ValidFAA registration status code V: Valid registration. All codes
N20314 Cessna
172M
Fixed-wing, single engine Co-owned owner
Maine
Standard 2023-01-28 ValidFAA registration status code V: Valid registration. All codes
N32559 Piper
PA-28-151
Fixed-wing, single engine Eagle Valley Aviation LLC
Howard, Pennsylvania
Standard 2023-01-28 ValidFAA registration status code V: Valid registration. All codes
N41622 Piper
PA-28-151
Fixed-wing, single engine Stingray LLC
Kalispell, Montana
Standard 2023-01-28 ValidFAA registration status code V: Valid registration. All codes
N54371 Cessna
172P
Fixed-wing, single engine Clare Air Services LLC
Saint Johns, Michigan
Standard 2023-01-28 ValidFAA registration status code V: Valid registration. All codes
N5739D Piper
PA-22-150
Fixed-wing, single engine Individual owner
Washington
Standard 2023-01-28 ValidFAA registration status code V: Valid registration. All codes
N6341W Piper
PA-28-140
Fixed-wing, single engine Mangham Aviation LLC
Mullin, Texas
Standard 2023-01-28 ValidFAA registration status code V: Valid registration. All codes
N739LW Cessna
172N
Fixed-wing, single engine Flycarolina LLC
Concord, North Carolina
Standard 2023-01-28 ValidFAA registration status code V: Valid registration. All codes
N82671 Cessna
172M
Fixed-wing, single engine Individual owner
Washington
Standard 2023-01-28 ValidFAA registration status code V: Valid registration. All codes
N924MC Cessna
172P
Fixed-wing, single engine J Airco LLC
Nashville, Tennessee
Standard 2023-01-28 ValidFAA registration status code V: Valid registration. All codes
N9798U Grumman American Avn. Corp.
AA-5A
Fixed-wing, single engine Individual owner
California
Standard 2023-01-28 ValidFAA registration status code V: Valid registration. All codes
N984TH Douglas Hiram P
SA-300
Fixed-wing, single engine Individual owner
Tennessee
Experimental 2023-01-28 ValidFAA registration status code V: Valid registration. All codes
N2232L Beech
B19
Fixed-wing, single engine Individual owner
Georgia
Standard 2023-01-27 ValidFAA registration status code V: Valid registration. All codes
N2429J Kahle Jack E
GLASTAR
Fixed-wing, single engine Individual owner
Nevada
Experimental 2023-01-27 ValidFAA registration status code V: Valid registration. All codes
N2914A Piper
PA-28-161
Fixed-wing, single engine Avier LLC
Beverly, Massachusetts
Standard 2023-01-27 ValidFAA registration status code V: Valid registration. All codes
N32662 Piper
PA-28-151
Fixed-wing, single engine Individual owner
Illinois
Standard 2023-01-27 ValidFAA registration status code V: Valid registration. All codes
N43050 Piper
PA-28-151
Fixed-wing, single engine Essex Air LLC
Franklin Lakes, New Jersey
Standard 2023-01-27 ValidFAA registration status code V: Valid registration. All codes
N515JH Piper
PA-28-161
Fixed-wing, single engine A&J Aircraft Leasing INC
Burlington, Colorado
Standard 2023-01-27 ValidFAA registration status code V: Valid registration. All codes
N650FL Piper
PA-28-140
Fixed-wing, single engine Individual owner
Arkansas
Standard 2023-01-27 ValidFAA registration status code V: Valid registration. All codes
N7005Q Cessna
172L
Fixed-wing, single engine Central Arkansas Flying Club INC
Bryant, Arkansas
Standard 2023-01-27 ValidFAA registration status code V: Valid registration. All codes
N73454 Cessna
172M
Fixed-wing, single engine Yr-Aircraft Leasing LLC
Soldotna, Alaska
Standard 2023-01-27 ValidFAA registration status code V: Valid registration. All codes
N78763 Cessna
172N
Fixed-wing, single engine Steve'S Landavator Service LLC
Oley, Pennsylvania
Standard 2023-01-27 ValidFAA registration status code V: Valid registration. All codes
N7924G Cessna
172L
Fixed-wing, single engine Individual owner
Washington
Standard 2023-01-27 ValidFAA registration status code V: Valid registration. All codes
N80612 Cessna
172M
Fixed-wing, single engine Individual owner
Hawaii
Standard 2023-01-27 ValidFAA registration status code V: Valid registration. All codes
N933BK Piper
PA-28-140
Fixed-wing, single engine Individual owner
Minnesota
Standard 2023-01-27 ValidFAA registration status code V: Valid registration. All codes
N9994U Grumman American Avn. Corp.
AA-5A
Fixed-wing, single engine Individual owner
Texas
Standard 2023-01-27 ValidFAA registration status code V: Valid registration. All codes
N251RX Grumman American Avn. Corp.
AA-5A
Fixed-wing, single engine Plane Therapy LLC
Hudson, Florida
Standard 2023-01-26 ValidFAA registration status code V: Valid registration. All codes
N2634M Piper
PA-28-161
Fixed-wing, single engine N2634Mm LLC
Farmingdale, New York
Standard 2023-01-26 ValidFAA registration status code V: Valid registration. All codes
N3285P Piper
PA-23-160
Fixed-wing, multi-engine Lsop Rentals Premier Asset Management LLC
Gowanda, New York
Standard 2023-01-26 ValidFAA registration status code V: Valid registration. All codes
N3429E Cessna
172N
Fixed-wing, single engine Melbourne Flight Training LLC
Melbourne, Florida
Standard 2023-01-26 ValidFAA registration status code V: Valid registration. All codes
N47941 Piper
PA-28-161
Fixed-wing, single engine Engineering Forensics INC
Glen Burnie, Maryland
Standard 2023-01-26 ValidFAA registration status code V: Valid registration. All codes
N4951G Cessna
172N
Fixed-wing, single engine Melbourne Flight Training LLC
Melbourne, Florida
Standard 2023-01-26 ValidFAA registration status code V: Valid registration. All codes
N5780W Piper
PA-28-160
Fixed-wing, single engine Co-owned owner
Pennsylvania
Standard 2023-01-26 ValidFAA registration status code V: Valid registration. All codes
N5868L American
AA-5
Fixed-wing, single engine Engineering Forensics INC
Glen Burnie, Maryland
Standard 2023-01-26 ValidFAA registration status code V: Valid registration. All codes
N6358C Piper
PA-28-161
Fixed-wing, single engine Woodhams Real Estate Group LLC
Atlanta, Georgia
Standard 2023-01-26 ValidFAA registration status code V: Valid registration. All codes
N7018G Cessna
172K
Fixed-wing, single engine Cape Aerial Tours INC
Chatham, Massachusetts
Standard 2023-01-26 ValidFAA registration status code V: Valid registration. All codes
N711WE Cessna
172N
Fixed-wing, single engine Melbourne Flight Training LLC
Melbourne, Florida
Standard 2023-01-26 ValidFAA registration status code V: Valid registration. All codes
N734PU Cessna
172N
Fixed-wing, single engine Arispe Aviation LLC
Mckinney, Texas
Standard 2023-01-26 ValidFAA registration status code V: Valid registration. All codes
N737EW Cessna
172N
Fixed-wing, single engine Oklahoma Airmen Flying Club INC
Jenks, Oklahoma
Standard 2023-01-26 ValidFAA registration status code V: Valid registration. All codes
N738QC Cessna
172N
Fixed-wing, single engine Individual owner
Michigan
Standard 2023-01-26 ValidFAA registration status code V: Valid registration. All codes
N7424R Piper
PA-28-140
Fixed-wing, single engine Ascend Aviation LLC
Bountiful, Utah
Standard 2023-01-26 ValidFAA registration status code V: Valid registration. All codes
N78716 Cessna
172K
Fixed-wing, single engine Individual owner
Texas
Standard 2023-01-26 ValidFAA registration status code V: Valid registration. All codes
N8268N Piper
PA-28-140
Fixed-wing, single engine Individual owner
Arizona
Standard 2023-01-26 ValidFAA registration status code V: Valid registration. All codes
N9332D Piper
PA-22-160
Fixed-wing, single engine Individual owner
California
Standard 2023-01-26 ValidFAA registration status code V: Valid registration. All codes
N9812J Cessna
172N
Fixed-wing, single engine Melbourne Flight Training LLC
Melbourne, Florida
Standard 2023-01-26 ValidFAA registration status code V: Valid registration. All codes
N1315U Cessna
172M
Fixed-wing, single engine Individual owner
Texas
Standard 2023-01-25 ValidFAA registration status code V: Valid registration. All codes
N13232 Cessna
172M
Fixed-wing, single engine Fly Lugu LLC
Southwick, Massachusetts
Standard 2023-01-25 ValidFAA registration status code V: Valid registration. All codes
N26127 Grumman American Avn. Corp.
AA-5A
Fixed-wing, single engine Individual owner
Florida
Standard 2023-01-25 ValidFAA registration status code V: Valid registration. All codes
N28RD Dann Ray Herbert
RV-3
Fixed-wing, single engine Individual owner
Minnesota
Experimental 2023-01-25 ValidFAA registration status code V: Valid registration. All codes
N4230J Piper
PA-28-140
Fixed-wing, single engine Pleasant Valley Aviation INC
Bellefonte, Pennsylvania
Standard 2023-01-25 ValidFAA registration status code V: Valid registration. All codes
N46323 Cessna
172K
Fixed-wing, single engine Individual owner
Texas
Standard 2023-01-25 ValidFAA registration status code V: Valid registration. All codes
N524LV Hohenshelt John R
VANS RV8
Fixed-wing, single engine Individual owner
Florida
Experimental 2023-01-25 ValidFAA registration status code V: Valid registration. All codes
N53873 Bellanca
7GCBC
Fixed-wing, single engine Co-owned owner
Minnesota
Standard 2023-01-25 ValidFAA registration status code V: Valid registration. All codes
N7882C Piper
PA-28-140
Fixed-wing, single engine Individual owner
Nevada
Standard 2023-01-25 ValidFAA registration status code V: Valid registration. All codes
N9561D Piper
PA-22-160
Fixed-wing, single engine Co-owned owner
Michigan
Standard 2023-01-25 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.