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
N6655H Edgar Allan Mahon
HATZ CB-1
Fixed-wing, single engine Individual owner
Minnesota
Experimental 2021-09-27 ValidFAA registration status code V: Valid registration. All codes
N920HG Kitzmiller
BUSHBY MUSTANG M-II
Fixed-wing, single engine Individual owner
Arizona
Experimental 2021-09-27 ValidFAA registration status code V: Valid registration. All codes
N9670P Piper
PA-18-150
Fixed-wing, single engine Moore Performance Aircraft LLC
Jenks, Oklahoma
Standard 2021-09-27 ValidFAA registration status code V: Valid registration. All codes
N13521 Cessna
172M
Fixed-wing, single engine Co-owned owner
Idaho
Standard 2021-09-24 ValidFAA registration status code V: Valid registration. All codes
N22271 Cessna
172M
Fixed-wing, single engine Ps N22271 LLC
Green Bay, Wisconsin
Standard 2021-09-24 ValidFAA registration status code V: Valid registration. All codes
N2301P Piper
PA-22-150
Fixed-wing, single engine Individual owner
Pennsylvania
Standard 2021-09-24 ValidFAA registration status code V: Valid registration. All codes
N4332X Piper
PA-28-151
Fixed-wing, single engine Rotor Spec Aviation LLC
Star, Idaho
Standard 2021-09-24 ValidFAA registration status code V: Valid registration. All codes
N73472 Cessna
172M
Fixed-wing, single engine Lajova LLC
Amarillo, Texas
Standard 2021-09-24 ValidFAA registration status code V: Valid registration. All codes
N944SJ Miller David
LONG-EZ
Fixed-wing, single engine Individual owner
Illinois
Experimental 2021-09-24 ValidFAA registration status code V: Valid registration. All codes
N12ER Piper
PA-28-151
Fixed-wing, single engine Propelling the Gospel Missions INC
Standish, Maine
Standard 2021-09-23 ValidFAA registration status code V: Valid registration. All codes
N19706 Cessna
172L
Fixed-wing, single engine S&S Aircraft INC
Bennington, Vermont
Standard 2021-09-23 ValidFAA registration status code V: Valid registration. All codes
N20670 Cessna
172M
Fixed-wing, single engine Individual owner
Arizona
Standard 2021-09-23 ValidFAA registration status code V: Valid registration. All codes
N2551U Piper
PA-28-161
Fixed-wing, single engine Individual owner
Georgia
Standard 2021-09-23 ValidFAA registration status code V: Valid registration. All codes
N3807P Piper
PA-22-150
Fixed-wing, single engine Individual owner
Washington
Experimental 2021-09-23 ValidFAA registration status code V: Valid registration. All codes
N4390Q Cessna
172L
Fixed-wing, single engine Flying Mermaid LLC
Aiea, Hawaii
Standard 2021-09-23 ValidFAA registration status code V: Valid registration. All codes
N50771 Cessna
172N
Fixed-wing, single engine Flying Mermaid LLC
Aiea, Hawaii
Standard 2021-09-23 ValidFAA registration status code V: Valid registration. All codes
N5550W Piper
PA-28-150
Fixed-wing, single engine Individual owner
Oklahoma
Standard 2021-09-23 ValidFAA registration status code V: Valid registration. All codes
N5988W Piper
PA-28-140
Fixed-wing, single engine West Central Aviation LLC
Prinsburg, Minnesota
Standard 2021-09-23 ValidFAA registration status code V: Valid registration. All codes
N69RX Stewart Richard L
GLASTAR
Fixed-wing, single engine Flying W Aviation LLC
Aurora, Colorado
Experimental 2021-09-23 ValidFAA registration status code V: Valid registration. All codes
N8724E Piper
PA-28-151
Fixed-wing, single engine Dcs School of Flying LLC
York, Pennsylvania
Standard 2021-09-23 ValidFAA registration status code V: Valid registration. All codes
N1913H Piper
PA-28-161
Fixed-wing, single engine Ollie and Wally Airlines LLC
Auburn, Washington
Standard 2021-09-22 ValidFAA registration status code V: Valid registration. All codes
N240MF Omf
OMF-100-160
Fixed-wing, single engine Individual owner
Virginia
Standard 2021-09-22 ValidFAA registration status code V: Valid registration. All codes
N4532R Piper
PA-28-140
Fixed-wing, single engine Individual owner
Minnesota
Standard 2021-09-22 ValidFAA registration status code V: Valid registration. All codes
N7243G Cessna
172K
Fixed-wing, single engine Individual owner
Pennsylvania
Standard 2021-09-22 ValidFAA registration status code V: Valid registration. All codes
N72BL Cessna
172K
Fixed-wing, single engine Skrow Works INC
West Monroe, Louisiana
Standard 2021-09-22 ValidFAA registration status code V: Valid registration. All codes
N166D Delano Dan
VANS RV-6
Fixed-wing, single engine Individual owner
California
Experimental 2021-09-21 ValidFAA registration status code V: Valid registration. All codes
N26695 Grumman American Avn. Corp.
AA-5A
Fixed-wing, single engine Individual owner
Ohio
Standard 2021-09-21 ValidFAA registration status code V: Valid registration. All codes
N3638P Piper
PA-22-150
Fixed-wing, single engine Individual owner
Michigan
Standard 2021-09-21 ValidFAA registration status code V: Valid registration. All codes
N4362R Cessna
172M
Fixed-wing, single engine Individual owner
California
Standard 2021-09-21 ValidFAA registration status code V: Valid registration. All codes
N4782T Piper
PA-28-140
Fixed-wing, single engine Individual owner
New Hampshire
Standard 2021-09-21 ValidFAA registration status code V: Valid registration. All codes
N6866H Cessna
172M
Fixed-wing, single engine Individual owner
Florida
Standard 2021-09-21 ValidFAA registration status code V: Valid registration. All codes
N7487D Piper
PA-18A 150
Fixed-wing, single engine Southern Cross Aviation INC
Wilmington, Delaware
Multiple 2021-09-21 ValidFAA registration status code V: Valid registration. All codes
N78830 Cessna
172K
Fixed-wing, single engine Individual owner
Illinois
Standard 2021-09-21 ValidFAA registration status code V: Valid registration. All codes
N8438Y Piper
PA-18-150
Fixed-wing, single engine Individual owner
Washington
Restricted 2021-09-21 ValidFAA registration status code V: Valid registration. All codes
N90LA American Champion Aircraft
7GCBC
Fixed-wing, single engine Lakeside Aerodome LTD
Clermont, Florida
Standard 2021-09-21 ValidFAA registration status code V: Valid registration. All codes
N1117U Cessna
172M
Fixed-wing, single engine Bhp Aviation
Santa Clara, California
Standard 2021-09-20 ValidFAA registration status code V: Valid registration. All codes
N4316J Piper
PA-28-140
Fixed-wing, single engine Individual owner
Indiana
Standard 2021-09-20 ValidFAA registration status code V: Valid registration. All codes
N738ZM Cessna
172N
Fixed-wing, single engine Aero Lease and Trading LLC
Miami, Florida
Standard 2021-09-20 ValidFAA registration status code V: Valid registration. All codes
N81259 Barron Glenn
VANS RV-4
Fixed-wing, single engine Thermodynamic Sciences LLC
Irvington, Alabama
Experimental 2021-09-20 ValidFAA registration status code V: Valid registration. All codes
N900WD Piper
PA-28-151
Fixed-wing, single engine Individual owner
Texas
Standard 2021-09-20 ValidFAA registration status code V: Valid registration. All codes
N9395H Cessna
172M
Fixed-wing, single engine Inosculation Air LLC
Summerville, South Carolina
Standard 2021-09-20 ValidFAA registration status code V: Valid registration. All codes
N291F Meyer Frederick W
RV-6A
Fixed-wing, single engine Individual owner
Nevada
Experimental 2021-09-17 ValidFAA registration status code V: Valid registration. All codes
N4243P Piper
PA-23-160
Fixed-wing, multi-engine Individual owner
Texas
Standard 2021-09-17 ValidFAA registration status code V: Valid registration. All codes
N5110G Piper
PA-28-140
Fixed-wing, single engine N5110G LLC
Orlando, Florida
Standard 2021-09-17 ValidFAA registration status code V: Valid registration. All codes
N5739W Piper
PA-28-160
Fixed-wing, single engine Individual owner
Oregon
Standard 2021-09-17 ValidFAA registration status code V: Valid registration. All codes
N2857Q Cessna
172L
Fixed-wing, single engine M3 Aviation Florida LLC
Fort Pierce, Florida
Standard 2021-09-16 ValidFAA registration status code V: Valid registration. All codes
N61870 Cessna
172M
Fixed-wing, single engine Dfu LLC
Boise, Idaho
Standard 2021-09-16 ValidFAA registration status code V: Valid registration. All codes
N6819W Piper
PA-28-140
Fixed-wing, single engine Individual owner
Kentucky
Standard 2021-09-16 ValidFAA registration status code V: Valid registration. All codes
N70095 Cessna
172M
Fixed-wing, single engine Eastern Kentucky University
Richmond, Kentucky
Standard 2021-09-16 ValidFAA registration status code V: Valid registration. All codes
N7291G Cessna
172K
Fixed-wing, single engine Individual owner
Ohio
Standard 2021-09-16 ValidFAA registration status code V: Valid registration. All codes
N2122J Piper
PA-28-161
Fixed-wing, single engine Charles City Aeronautics INC
Charles City, Iowa
Standard 2021-09-15 ValidFAA registration status code V: Valid registration. All codes
N3066P Piper
PA-23
Fixed-wing, multi-engine Individual owner
Guam
Standard 2021-09-15 ValidFAA registration status code V: Valid registration. All codes
N3218J Cessna
150G
Fixed-wing, single engine Individual owner
Washington
Experimental 2021-09-15 ValidFAA registration status code V: Valid registration. All codes
N55303 Piper
PA-28-140
Fixed-wing, single engine Individual owner
Arizona
Standard 2021-09-15 ValidFAA registration status code V: Valid registration. All codes
N6934B Piper
PA-22-150
Fixed-wing, single engine Individual owner
Montana
Standard 2021-09-15 ValidFAA registration status code V: Valid registration. All codes
N9845W Piper
PA-28-140
Fixed-wing, single engine Individual owner
Idaho
Standard 2021-09-15 ValidFAA registration status code V: Valid registration. All codes
N26AJ Jacobs Armin B
VANS RV9A
Fixed-wing, single engine Individual owner
Texas
Experimental 2021-09-14 ValidFAA registration status code V: Valid registration. All codes
N3356D Robinson Helicopter
R22 BETA
Helicopter Individual owner
Alaska
Standard 2021-09-14 ValidFAA registration status code V: Valid registration. All codes
N596PH Piper
PA-28-140
Fixed-wing, single engine Individual owner
Alabama
Standard 2021-09-14 ValidFAA registration status code V: Valid registration. All codes
N6852W Piper
PA-28-140
Fixed-wing, single engine Jurol Aviation Limited
Norwalk, Ohio
Standard 2021-09-14 ValidFAA registration status code V: Valid registration. All codes
N7162G Cessna
172K
Fixed-wing, single engine Wmg Security
Shelton, Washington
Standard 2021-09-14 ValidFAA registration status code V: Valid registration. All codes
N734PE Cessna
172N
Fixed-wing, single engine Cupp Aviation LLC
Marceline, Missouri
Restricted 2021-09-14 ValidFAA registration status code V: Valid registration. All codes
N7364J Piper
PA-28-140
Fixed-wing, single engine Individual owner
Alabama
Standard 2021-09-14 ValidFAA registration status code V: Valid registration. All codes
N791DA Piper
PA-28-140
Fixed-wing, single engine Individual owner
Tennessee
Standard 2021-09-14 ValidFAA registration status code V: Valid registration. All codes
N79ML Carter J Everice
BUSHBY MUSTANG II
Fixed-wing, single engine August Aero LLC
Kalispell, Montana
Experimental 2021-09-14 ValidFAA registration status code V: Valid registration. All codes
N4753J Beech
A23-19
Fixed-wing, single engine Tiki Aerospace LLC
Saint Petersburg, Florida
Standard 2021-09-13 ValidFAA registration status code V: Valid registration. All codes
N4813A Piper
PA-22-150
Fixed-wing, single engine Individual owner
New York
Standard 2021-09-13 ValidFAA registration status code V: Valid registration. All codes
N6953W Piper
PA-28-140
Fixed-wing, single engine Co-owned owner
Minnesota
Standard 2021-09-13 ValidFAA registration status code V: Valid registration. All codes
N738MW Cessna
172N
Fixed-wing, single engine N738Mw LLC
Jupiter, Florida
Standard 2021-09-13 ValidFAA registration status code V: Valid registration. All codes
N23RB Piper
PA-22-150
Fixed-wing, single engine Individual owner
Alaska
Standard 2021-09-11 ValidFAA registration status code V: Valid registration. All codes
N5596U Piper
PA-28-140
Fixed-wing, single engine Pine Aviation INC
Sheridan, Wyoming
Standard 2021-09-11 ValidFAA registration status code V: Valid registration. All codes
N6342W Piper
PA-28-140
Fixed-wing, single engine AG Air Squadron Two LLC
Saint Joseph, Illinois
Standard 2021-09-11 ValidFAA registration status code V: Valid registration. All codes
N64238 Cessna
172M
Fixed-wing, single engine Global Adventures N64238 LLC
Hollywood, Florida
Standard 2021-09-11 ValidFAA registration status code V: Valid registration. All codes
N6063E Cessna
172N
Fixed-wing, single engine Lawrence Aviation LLC
Overland Park, Kansas
Standard 2021-09-10 ValidFAA registration status code V: Valid registration. All codes
N6337W Piper
PA-28-140
Fixed-wing, single engine Individual owner
New Hampshire
Standard 2021-09-10 ValidFAA registration status code V: Valid registration. All codes
N6862W Piper
PA-28-140
Fixed-wing, single engine Fly Dynasty CORP
Ocala, Florida
Standard 2021-09-10 ValidFAA registration status code V: Valid registration. All codes
N754AK Piper
PA-12
Fixed-wing, single engine Co-owned owner
Alaska
Multiple 2021-09-10 ValidFAA registration status code V: Valid registration. All codes
N8131D Piper
PA-22-160
Fixed-wing, single engine Co-owned owner
Texas
Standard 2021-09-10 ValidFAA registration status code V: Valid registration. All codes
N13937 Piper
PA-18-150
Fixed-wing, single engine Rafter J Aviation LLC
Moab, Utah
Standard 2021-09-09 ValidFAA registration status code V: Valid registration. All codes
N19947 Cessna
172M
Fixed-wing, single engine Sprynx Aviation LLC
Plano, Texas
Standard 2021-09-09 ValidFAA registration status code V: Valid registration. All codes
N3251Z Piper
PA-22-150
Fixed-wing, single engine Copper River Airmotive LLC
Copper Center, Alaska
Restricted 2021-09-09 ValidFAA registration status code V: Valid registration. All codes
N43625 Piper
PA-28-151
Fixed-wing, single engine Southern Colorado Flight Professionals LLC
Pueblo, Colorado
Standard 2021-09-09 ValidFAA registration status code V: Valid registration. All codes
N44621 Piper
PA-28-151
Fixed-wing, single engine Individual owner
Pennsylvania
Standard 2021-09-09 ValidFAA registration status code V: Valid registration. All codes
N4625G Cessna
172N
Fixed-wing, single engine Opal Aviation LLC
Miami, Florida
Standard 2021-09-09 ValidFAA registration status code V: Valid registration. All codes
N7208D Piper
PA-22-150
Fixed-wing, single engine Copper River Airmotive LLC
Copper Center, Alaska
Standard 2021-09-09 ValidFAA registration status code V: Valid registration. All codes
N8320A Robinson Helicopter
R22 BETA
Helicopter Individual owner
Texas
Standard 2021-09-09 ValidFAA registration status code V: Valid registration. All codes
N128AK Kaste Allyn W
HATZ CB-1
Fixed-wing, single engine Co-owned owner
Montana
Experimental 2021-09-08 ValidFAA registration status code V: Valid registration. All codes
N16382 Piper
PA-28-140
Fixed-wing, single engine Co-owned owner
Minnesota
Standard 2021-09-08 ValidFAA registration status code V: Valid registration. All codes
N17HZ Cessna
172M
Fixed-wing, single engine Leading Edge Flight Academy LLC
Bend, Oregon
Standard 2021-09-08 ValidFAA registration status code V: Valid registration. All codes
N4227Q Cessna
172L
Fixed-wing, single engine Individual owner
Utah
Standard 2021-09-08 ValidFAA registration status code V: Valid registration. All codes
N4913G Cessna
172N
Fixed-wing, single engine Leading Edge Flight Academy LLC
Bend, Oregon
Standard 2021-09-08 ValidFAA registration status code V: Valid registration. All codes
N49CG Cessna
172M
Fixed-wing, single engine Leading Edge Flight Academy LLC
Bend, Oregon
Standard 2021-09-08 ValidFAA registration status code V: Valid registration. All codes
N5462Q Cessna
172M
Fixed-wing, single engine Leading Edge Flight Academy LLC
Bend, Oregon
Standard 2021-09-08 ValidFAA registration status code V: Valid registration. All codes
N734BB Cessna
172N
Fixed-wing, single engine Leading Edge Flight Academy LLC
Bend, Oregon
Standard 2021-09-08 ValidFAA registration status code V: Valid registration. All codes
N73707 Cessna
172N
Fixed-wing, single engine Leading Edge Flight Academy LLC
Bend, Oregon
Standard 2021-09-08 ValidFAA registration status code V: Valid registration. All codes
N8477L Cessna
172I
Fixed-wing, single engine Kulm Aviation LLC
Kulm, North Dakota
Standard 2021-09-08 ValidFAA registration status code V: Valid registration. All codes
N9004D Piper
PA-22-160
Fixed-wing, single engine Individual owner
Michigan
Standard 2021-09-08 ValidFAA registration status code V: Valid registration. All codes
N9012H Cessna
172M
Fixed-wing, single engine Leading Edge Flight Academy LLC
Bend, Oregon
Standard 2021-09-08 ValidFAA registration status code V: Valid registration. All codes
N9643Q Cessna
172M
Fixed-wing, single engine Leading Edge Flight Academy LLC
Bend, Oregon
Standard 2021-09-08 ValidFAA registration status code V: Valid registration. All codes
N9830V Cessna
172M
Fixed-wing, single engine Leading Edge Flight Academy LLC
Bend, Oregon
Standard 2021-09-08 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.