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
N6492R Piper
PA-28-140
Fixed-wing, single engine Individual owner
California
Standard 2018-07-31 ValidFAA registration status code V: Valid registration. All codes
N65RJ Piper
PA-28-180
Fixed-wing, single engine Advantage Flight Training and Services LLC
Warren, Arkansas
Standard 2018-07-31 ValidFAA registration status code V: Valid registration. All codes
N79482 Cessna
172K
Fixed-wing, single engine Co-owned owner
Georgia
Standard 2018-07-31 ValidFAA registration status code V: Valid registration. All codes
N1460X Piper
PA-28-140
Fixed-wing, single engine Individual owner
Wisconsin
Standard 2018-07-30 ValidFAA registration status code V: Valid registration. All codes
N15RM Piper
PA-18-150
Fixed-wing, single engine Flying y Farms LLC
Klamath Falls, Oregon
Standard 2018-07-30 ValidFAA registration status code V: Valid registration. All codes
N2838D Piper
PA-28-161
Fixed-wing, single engine His Promise Aviation Service INC
Big Spring, Texas
Standard 2018-07-30 ValidFAA registration status code V: Valid registration. All codes
N5053L Bellanca
7GCBC
Fixed-wing, single engine Individual owner
Kentucky
Standard 2018-07-30 ValidFAA registration status code V: Valid registration. All codes
N5392W Piper
PA-28
Fixed-wing, single engine Individual owner
Arizona
Standard 2018-07-30 ValidFAA registration status code V: Valid registration. All codes
N624RC Cahill Richard
COZY
Fixed-wing, single engine Individual owner
Ohio
Experimental 2018-07-30 ValidFAA registration status code V: Valid registration. All codes
N9604S Champion
7GCAA
Fixed-wing, single engine Fmco Promotions INC
North Little Rock, Arkansas
Standard 2018-07-30 ValidFAA registration status code V: Valid registration. All codes
N1699T Piper
PA-28-140
Fixed-wing, single engine Individual owner
North Carolina
Standard 2018-07-27 ValidFAA registration status code V: Valid registration. All codes
N26179 Grumman American Avn. Corp.
AA-5A
Fixed-wing, single engine Individual owner
Oregon
Standard 2018-07-27 ValidFAA registration status code V: Valid registration. All codes
N5033V Bellanca
7GCBC
Fixed-wing, single engine Co-owned owner
California
Multiple 2018-07-26 ValidFAA registration status code V: Valid registration. All codes
N6391J Cessna
172N
Fixed-wing, single engine Aty Aviation INC
Watertown, South Dakota
Standard 2018-07-26 ValidFAA registration status code V: Valid registration. All codes
N667BA Amendala Brian
MURPHY REBEL
Fixed-wing, single engine Individual owner
Oregon
Experimental 2018-07-26 ValidFAA registration status code V: Valid registration. All codes
N29251 Cessna
172M
Fixed-wing, single engine Southeast Aviation Services INC
Hattiesburg, Mississippi
Standard 2018-07-25 ValidFAA registration status code V: Valid registration. All codes
N3743P Piper
PA-22-150
Fixed-wing, single engine Bulldog Aviation LLC
Ely, Minnesota
Standard 2018-07-25 ValidFAA registration status code V: Valid registration. All codes
N3764Z Piper
PA-18-150
Fixed-wing, single engine Co-owned owner
Alaska
Standard 2018-07-25 ValidFAA registration status code V: Valid registration. All codes
N43057 Piper
PA-28-151
Fixed-wing, single engine Bogaard Family Partnership
Park Rapids, Minnesota
Standard 2018-07-25 ValidFAA registration status code V: Valid registration. All codes
N4462A Piper
PA-22-150
Fixed-wing, single engine Individual owner
Texas
Standard 2018-07-25 ValidFAA registration status code V: Valid registration. All codes
N8491R Piper
PA-28-140
Fixed-wing, single engine Individual owner
Tennessee
Standard 2018-07-25 ValidFAA registration status code V: Valid registration. All codes
N26602 Robinson Helicopter
R22 BETA
Helicopter Eastern New Mexico University - Roswell
Roswell, New Mexico
Standard 2018-07-24 ValidFAA registration status code V: Valid registration. All codes
N7573G Cessna
172L
Fixed-wing, single engine Individual owner
Nebraska
Standard 2018-07-24 ValidFAA registration status code V: Valid registration. All codes
N172RJ Cessna
172M
Fixed-wing, single engine Ridgik George H
Jamestown, Colorado
Standard 2018-07-23 ValidFAA registration status code V: Valid registration. All codes
N20203 Cessna
172M
Fixed-wing, single engine Individual owner
Florida
Standard 2018-07-23 ValidFAA registration status code V: Valid registration. All codes
N33319 Piper
PA-28-151
Fixed-wing, single engine Nationwide Aviation LLC
Hudson Oaks, Texas
Standard 2018-07-23 ValidFAA registration status code V: Valid registration. All codes
N4341J Jones Ted F
VANS RV6-A
Fixed-wing, single engine Co-owned owner
Nevada
Experimental 2018-07-23 ValidFAA registration status code V: Valid registration. All codes
N5135G Cessna
172K
Fixed-wing, single engine Individual owner
Alabama
Standard 2018-07-23 ValidFAA registration status code V: Valid registration. All codes
N7298J Piper
PA-28-140
Fixed-wing, single engine Co-owned owner
California
Standard 2018-07-23 ValidFAA registration status code V: Valid registration. All codes
N4076H Robinson Helicopter
R22 BETA
Helicopter Summerskyz INC
Saint Joseph, Illinois
Standard 2018-07-20 ValidFAA registration status code V: Valid registration. All codes
N2866T Piper
PA-28-140
Fixed-wing, single engine Pacific Coast Air Museum
Santa Rosa, California
Standard 2018-07-19 ValidFAA registration status code V: Valid registration. All codes
N8020D Piper
PA-22-150
Fixed-wing, single engine Individual owner
Montana
Standard 2018-07-19 ValidFAA registration status code V: Valid registration. All codes
N19701 Cessna
172L
Fixed-wing, single engine Old School Aircraft LLC
Jackson, Tennessee
Standard 2018-07-18 ValidFAA registration status code V: Valid registration. All codes
N2211Z Piper
PA-28-161
Fixed-wing, single engine N2211Z LLC
Lake Worth, Florida
Standard 2018-07-18 ValidFAA registration status code V: Valid registration. All codes
N369RJ Cessna
172N
Fixed-wing, single engine D & S Aviation LLC
Spring, Texas
Standard 2018-07-18 ValidFAA registration status code V: Valid registration. All codes
N64556 Cessna
172P
Fixed-wing, single engine D & S Aviation LLC
Spring, Texas
Standard 2018-07-18 ValidFAA registration status code V: Valid registration. All codes
N84146 Cessna
172K
Fixed-wing, single engine Stone Air LLC
Carrollton, Georgia
Standard 2018-07-18 ValidFAA registration status code V: Valid registration. All codes
N8875N Piper
PA-28-140
Fixed-wing, single engine Individual owner
Virginia
Standard 2018-07-18 ValidFAA registration status code V: Valid registration. All codes
N9568L Cessna
172P
Fixed-wing, single engine D & S Aviation LLC
Spring, Texas
Standard 2018-07-18 ValidFAA registration status code V: Valid registration. All codes
N1723V Cessna
172M
Fixed-wing, single engine Co-owned owner
Oklahoma
Standard 2018-07-17 ValidFAA registration status code V: Valid registration. All codes
N7197L Grumman American Avn. Corp.
AA-5
Fixed-wing, single engine Individual owner
Mississippi
Standard 2018-07-17 ValidFAA registration status code V: Valid registration. All codes
N7276J Piper
PA-28-140
Fixed-wing, single engine Individual owner
Montana
Standard 2018-07-17 ValidFAA registration status code V: Valid registration. All codes
N737JQ Cessna
172N
Fixed-wing, single engine Individual owner
Indiana
Standard 2018-07-17 ValidFAA registration status code V: Valid registration. All codes
N7881G Cessna
172L
Fixed-wing, single engine Co-owned owner
Indiana
Standard 2018-07-17 ValidFAA registration status code V: Valid registration. All codes
N9261H Cessna
172M
Fixed-wing, single engine Individual owner
Pennsylvania
Standard 2018-07-17 ValidFAA registration status code V: Valid registration. All codes
N9581S Champion
7ECA
Fixed-wing, single engine Individual owner
Virginia
Standard 2018-07-17 ValidFAA registration status code V: Valid registration. All codes
N1120U Piper
PA-18-150
Fixed-wing, single engine Individual owner
Montana
Standard 2018-07-16 ValidFAA registration status code V: Valid registration. All codes
N13219 Cessna
172M
Fixed-wing, single engine Reboot Charity INC
West Palm Beach, Florida
Standard 2018-07-16 ValidFAA registration status code V: Valid registration. All codes
N1422E Cessna
172N
Fixed-wing, single engine A S Air LLC
Lantana, Florida
Standard 2018-07-16 ValidFAA registration status code V: Valid registration. All codes
N53864 Bellanca
7KCAB
Fixed-wing, single engine Jordon Air INC
Hugoton, Kansas
Standard 2018-07-16 ValidFAA registration status code V: Valid registration. All codes
N6304Z Piper
PA-25
Fixed-wing, single engine Vintage Aero Sports LLC
Easton, Pennsylvania
Restricted 2018-07-13 ValidFAA registration status code V: Valid registration. All codes
N910MM King Michael R
RV-9A
Fixed-wing, single engine Individual owner
California
Experimental 2018-07-13 ValidFAA registration status code V: Valid registration. All codes
N9844W Piper
PA-28-140
Fixed-wing, single engine Individual owner
Florida
Standard 2018-07-13 ValidFAA registration status code V: Valid registration. All codes
N2581M Piper
PA-12
Fixed-wing, single engine Co-owned owner
Alaska
Standard 2018-07-12 ValidFAA registration status code V: Valid registration. All codes
N7121D Piper
PA-22-150
Fixed-wing, single engine Individual owner
Wisconsin
Standard 2018-07-12 ValidFAA registration status code V: Valid registration. All codes
N7391J Piper
PA-28-140
Fixed-wing, single engine Individual owner
South Dakota
Standard 2018-07-12 ValidFAA registration status code V: Valid registration. All codes
N1330A Piper
PA-18
Fixed-wing, single engine Individual owner
Alaska
Standard 2018-07-11 ValidFAA registration status code V: Valid registration. All codes
N1463E Cessna
172N
Fixed-wing, single engine 1463 Echo LLC
Eau Claire, Wisconsin
Standard 2018-07-11 ValidFAA registration status code V: Valid registration. All codes
N3049L Piper
PA-28-161
Fixed-wing, single engine Individual owner
Maryland
Standard 2018-07-11 ValidFAA registration status code V: Valid registration. All codes
N46351 Cessna
172K
Fixed-wing, single engine Individual owner
Virginia
Standard 2018-07-11 ValidFAA registration status code V: Valid registration. All codes
N6825J Piper
PA-28-151
Fixed-wing, single engine Individual owner
Ohio
Standard 2018-07-11 ValidFAA registration status code V: Valid registration. All codes
N7144G Cessna
172K
Fixed-wing, single engine Jc Flight INC
Wilmington, Delaware
Standard 2018-07-11 ValidFAA registration status code V: Valid registration. All codes
N914JD Cessna
172M
Fixed-wing, single engine Ais Wings LLC
Grand Rapids, Michigan
Standard 2018-07-11 ValidFAA registration status code V: Valid registration. All codes
N9265H Cessna
172M
Fixed-wing, single engine Individual owner
Florida
Standard 2018-07-11 ValidFAA registration status code V: Valid registration. All codes
N216T Keim Tom A
RV-4
Fixed-wing, single engine Individual owner
Texas
Experimental 2018-07-10 ValidFAA registration status code V: Valid registration. All codes
N424AC American Champion Aircraft
7GCAA
Fixed-wing, single engine Individual owner
Tennessee
Standard 2018-07-10 ValidFAA registration status code V: Valid registration. All codes
N4379D Piper
PA-28-161
Fixed-wing, single engine Individual owner
Rhode Island
Standard 2018-07-10 ValidFAA registration status code V: Valid registration. All codes
N5477W Piper
PA-28-160
Fixed-wing, single engine Achi INC
San Jacinto, California
Standard 2018-07-10 ValidFAA registration status code V: Valid registration. All codes
N7090R Piper
PA-28-140
Fixed-wing, single engine Individual owner
Pennsylvania
Standard 2018-07-10 ValidFAA registration status code V: Valid registration. All codes
N12537 Cessna
172M
Fixed-wing, single engine Individual owner
Florida
Standard 2018-07-09 ValidFAA registration status code V: Valid registration. All codes
N3120Z Piper
PA-22-160
Fixed-wing, single engine Individual owner
Texas
Standard 2018-07-09 ValidFAA registration status code V: Valid registration. All codes
N32659 Piper
PA-28-151
Fixed-wing, single engine Allen Aviation LLC
Mansfield, Massachusetts
Standard 2018-07-09 ValidFAA registration status code V: Valid registration. All codes
N55148 Piper
PA-28-140
Fixed-wing, single engine Individual owner
California
Standard 2018-07-09 ValidFAA registration status code V: Valid registration. All codes
N737LL Cessna
172N
Fixed-wing, single engine Co-owned owner
Illinois
Standard 2018-07-09 ValidFAA registration status code V: Valid registration. All codes
N7733G Cessna
172L
Fixed-wing, single engine Washingtons Mt St Helens CO INC
Mill Creek, Washington
Standard 2018-07-09 ValidFAA registration status code V: Valid registration. All codes
N8182E Cessna
172N
Fixed-wing, single engine Red Arrow Aviation LLC
Santa Teresa, New Mexico
Standard 2018-07-09 ValidFAA registration status code V: Valid registration. All codes
N83285 Piper
PA-18-150
Fixed-wing, single engine Co-owned owner
Alaska
Restricted 2018-07-09 ValidFAA registration status code V: Valid registration. All codes
N106GC Cessna
172M
Fixed-wing, single engine Individual owner
Georgia
Standard 2018-07-06 ValidFAA registration status code V: Valid registration. All codes
N29521 Cessna
177
Fixed-wing, single engine Co-owned owner
Kansas
Standard 2018-07-06 ValidFAA registration status code V: Valid registration. All codes
N6079Z Piper
PA-25
Fixed-wing, single engine Simmons Aviation Services LLC
Pawcatuck, Connecticut
Restricted 2018-07-06 ValidFAA registration status code V: Valid registration. All codes
N2271P Piper
PA-23
Fixed-wing, multi-engine Individual owner
Florida
Standard 2018-07-05 ValidFAA registration status code V: Valid registration. All codes
N4284Z Piper
PA-18-150
Fixed-wing, single engine Individual owner
Washington
Standard 2018-07-05 ValidFAA registration status code V: Valid registration. All codes
N1973F Cessna
172N
Fixed-wing, single engine Individual owner
Florida
Standard 2018-07-03 ValidFAA registration status code V: Valid registration. All codes
N33806 Piper
PA-28-151
Fixed-wing, single engine Eagle 64 LLC
Stuart, Florida
Standard 2018-07-03 ValidFAA registration status code V: Valid registration. All codes
N66MN Stern Terrel L
RV-4
Fixed-wing, single engine Individual owner
Texas
Experimental 2018-07-03 ValidFAA registration status code V: Valid registration. All codes
N734DZ Cessna
172N
Fixed-wing, single engine Co-owned owner
North Dakota
Standard 2018-07-03 ValidFAA registration status code V: Valid registration. All codes
N8330L Piper
PA-28-161
Fixed-wing, single engine Paris Air INC
Vero Beach, Florida
Standard 2018-07-03 ValidFAA registration status code V: Valid registration. All codes
N8418C Piper
PA-28-151
Fixed-wing, single engine Wingman Aircraft Repair INC
Lawrenceville, Georgia
Standard 2018-07-03 ValidFAA registration status code V: Valid registration. All codes
N99344 Cessna
172P
Fixed-wing, single engine Global Tours & Travel Services LLC
Davie, Florida
Standard 2018-07-03 ValidFAA registration status code V: Valid registration. All codes
N46529 Cessna
172K
Fixed-wing, single engine Toledo City School District
Toledo, Ohio
Standard 2018-07-02 ValidFAA registration status code V: Valid registration. All codes
N5621W Piper
PA-28-150
Fixed-wing, single engine Individual owner
Alabama
Standard 2018-07-02 ValidFAA registration status code V: Valid registration. All codes
N64184 Cessna
172M
Fixed-wing, single engine Arlington Flight Services INC
Arlington, Washington
Standard 2018-07-02 ValidFAA registration status code V: Valid registration. All codes
N65ZM Gesin John
GESIN RV-3
Fixed-wing, single engine Individual owner
Texas
Experimental 2018-07-02 ValidFAA registration status code V: Valid registration. All codes
N764BK Cessna
172M
Fixed-wing, single engine Fairmont State University
Fairmont, West Virginia
Standard 2018-07-02 ValidFAA registration status code V: Valid registration. All codes
N7845G Cessna
172L
Fixed-wing, single engine Solorio INC
Mission, Texas
Standard 2018-07-02 ValidFAA registration status code V: Valid registration. All codes
N8179N Piper
PA-28-140
Fixed-wing, single engine Individual owner
New Hampshire
Standard 2018-07-02 ValidFAA registration status code V: Valid registration. All codes
N83960 Piper
PA-28-161
Fixed-wing, single engine Paris Air INC
Vero Beach, Florida
Standard 2018-07-02 ValidFAA registration status code V: Valid registration. All codes
N3445E Cessna
172N
Fixed-wing, single engine Individual owner
Virginia
Standard 2018-06-29 ValidFAA registration status code V: Valid registration. All codes
N4918F Piper
PA-28-151
Fixed-wing, single engine Individual owner
Kentucky
Standard 2018-06-29 ValidFAA registration status code V: Valid registration. All codes
N8446R Piper
PA-28-140
Fixed-wing, single engine Individual owner
Michigan
Standard 2018-06-29 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.