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
N9RX Elmendorf Leonard C
ES3
Fixed-wing, single engine Individual owner
Florida
Experimental 2013-05-23 ValidFAA registration status code V: Valid registration. All codes
N613PC American Champion Aircraft
7GCBC
Fixed-wing, single engine Individual owner
Texas
Standard 2013-05-21 ValidFAA registration status code V: Valid registration. All codes
N3762Z Piper
PA-18-150
Fixed-wing, single engine Individual owner
Colorado
Multiple 2013-05-20 ValidFAA registration status code V: Valid registration. All codes
N555SL Cessna
172M
Fixed-wing, single engine Individual owner
Texas
Standard 2013-05-20 ValidFAA registration status code V: Valid registration. All codes
N7356J Piper
PA-28-140
Fixed-wing, single engine Individual owner
Alabama
Standard 2013-05-20 ValidFAA registration status code V: Valid registration. All codes
N80641 Cessna
172M
Fixed-wing, single engine Missionary Flight Training INC
Fort Pierce, Florida
Standard 2013-05-20 ValidFAA registration status code V: Valid registration. All codes
N9247D Piper
PA-22-160
Fixed-wing, single engine Co-owned owner
Oklahoma
Standard 2013-05-20 ValidFAA registration status code V: Valid registration. All codes
N4386Z Piper
PA-18-150
Fixed-wing, single engine Co-owned owner
Alaska
Multiple 2013-05-17 ValidFAA registration status code V: Valid registration. All codes
N733TP Cessna
172N
Fixed-wing, single engine R&R Aero Services LLC
Eden Prairie, Minnesota
Standard 2013-05-16 ValidFAA registration status code V: Valid registration. All codes
N13240 Cessna
172M
Fixed-wing, single engine Arkansas-Oklahoma Railroad INC
Wilburton, Oklahoma
Standard 2013-05-15 ValidFAA registration status code V: Valid registration. All codes
N457AC American Champion Aircraft
7GCAA
Fixed-wing, single engine Individual owner
Florida
Standard 2013-05-15 ValidFAA registration status code V: Valid registration. All codes
N6301D Cessna
172N
Fixed-wing, single engine R&R Aero Services LLC
Eden Prairie, Minnesota
Standard 2013-05-15 ValidFAA registration status code V: Valid registration. All codes
N934RV Butley Robert A
RV-4
Fixed-wing, single engine Individual owner
Puerto Rico
Experimental 2013-05-15 ValidFAA registration status code V: Valid registration. All codes
N4181Z Piper
PA-18-150
Fixed-wing, single engine Individual owner
Mississippi
Standard 2013-05-14 ValidFAA registration status code V: Valid registration. All codes
N5RW Cessna
172L
Fixed-wing, single engine Individual owner
Louisiana
Standard 2013-05-14 ValidFAA registration status code V: Valid registration. All codes
N7225G Cessna
172K
Fixed-wing, single engine Individual owner
Pennsylvania
Standard 2013-05-14 ValidFAA registration status code V: Valid registration. All codes
N7360D Piper
PA-18
Fixed-wing, single engine Co-owned owner
South Dakota
Standard 2013-05-14 ValidFAA registration status code V: Valid registration. All codes
N747WM American Champion Aircraft
7GCAA
Fixed-wing, single engine Individual owner
Minnesota
Standard 2013-05-14 ValidFAA registration status code V: Valid registration. All codes
N943KS Cessna
172N
Fixed-wing, single engine Co-owned owner
Arizona
Standard 2013-05-13 ValidFAA registration status code V: Valid registration. All codes
N4909G Cessna
172N
Fixed-wing, single engine Red Arrow Aviation LLC
Santa Teresa, New Mexico
Standard 2013-05-10 ValidFAA registration status code V: Valid registration. All codes
N316CA Cessna
172M
Fixed-wing, single engine Choice Aviation LLC
Hamilton, Montana
Standard 2013-05-09 ValidFAA registration status code V: Valid registration. All codes
N362CA Cessna
172K
Fixed-wing, single engine Choice Aviation LLC
Hamilton, Montana
Standard 2013-05-09 ValidFAA registration status code V: Valid registration. All codes
N6512D Cessna
172N
Fixed-wing, single engine Cajun Wings LLC
Bourg, Louisiana
Standard 2013-05-09 ValidFAA registration status code V: Valid registration. All codes
N98407 Cessna
172P
Fixed-wing, single engine Choice Aviation LLC
Hamilton, Montana
Standard 2013-05-09 ValidFAA registration status code V: Valid registration. All codes
N733HZ Cessna
172N
Fixed-wing, single engine Individual owner
California
Standard 2013-05-08 ValidFAA registration status code V: Valid registration. All codes
N75822 Cessna
172N
Fixed-wing, single engine International Air Services INC Trustee
Carson City, Nevada
Standard 2013-05-07 ValidFAA registration status code V: Valid registration. All codes
N136LM Cessna
172M
Fixed-wing, single engine Lge Flying Club
Canton, Georgia
Standard 2013-05-06 ValidFAA registration status code V: Valid registration. All codes
N46726 Cessna
172K
Fixed-wing, single engine Individual owner
Arkansas
Standard 2013-05-06 ValidFAA registration status code V: Valid registration. All codes
N738PV Cessna
172N
Fixed-wing, single engine Lawn Dart Flyers LLC
Shelburne, Vermont
Standard 2013-05-06 ValidFAA registration status code V: Valid registration. All codes
N9839D Piper
PA-22-150
Fixed-wing, single engine Co-owned owner
Iowa
Standard 2013-05-06 ValidFAA registration status code V: Valid registration. All codes
N64CW Piper
PA-12
Fixed-wing, single engine Individual owner
Texas
Standard 2013-05-02 ValidFAA registration status code V: Valid registration. All codes
N12209 Cessna
172M
Fixed-wing, single engine Individual owner
Florida
Standard 2013-04-30 ValidFAA registration status code V: Valid registration. All codes
N1234R Raysik Michael J
RV-4
Fixed-wing, single engine Fitzair LLC
Bellevue, Nebraska
Experimental 2013-04-30 ValidFAA registration status code V: Valid registration. All codes
N19837 Cessna
172M
Fixed-wing, single engine Individual owner
Florida
Standard 2013-04-30 ValidFAA registration status code V: Valid registration. All codes
N4011E Robinson Helicopter
R22 BETA
Helicopter Co-owned owner
California
Standard 2013-04-29 ValidFAA registration status code V: Valid registration. All codes
N766MF Grumman American Avn. Corp.
AA-5A
Fixed-wing, single engine Co-owned owner
Florida
Standard 2013-04-29 ValidFAA registration status code V: Valid registration. All codes
N7161R Piper
PA-28-140
Fixed-wing, single engine Co-owned owner
New Jersey
Standard 2013-04-25 ValidFAA registration status code V: Valid registration. All codes
N4343T Piper
PA-28-140
Fixed-wing, single engine Individual owner
Missouri
Standard 2013-04-24 ValidFAA registration status code V: Valid registration. All codes
N6140Z Piper
PA-25
Fixed-wing, single engine Connecticut Soaring Association INC
New London, Connecticut
Standard 2013-04-24 ValidFAA registration status code V: Valid registration. All codes
N172MH Cessna
172N
Fixed-wing, single engine Individual owner
Kentucky
Standard 2013-04-23 ValidFAA registration status code V: Valid registration. All codes
N4728J Beech
A23-19
Fixed-wing, single engine Co-owned owner
Illinois
Standard 2013-04-23 ValidFAA registration status code V: Valid registration. All codes
N7216G Cessna
172K
Fixed-wing, single engine Lincoln Skyways INC
Lincoln, California
Standard 2013-04-23 ValidFAA registration status code V: Valid registration. All codes
N12246 Cessna
172M
Fixed-wing, single engine Individual owner
California
Standard 2013-04-19 ValidFAA registration status code V: Valid registration. All codes
N2660P Piper
PA-22-150
Fixed-wing, single engine Individual owner
Arkansas
Standard 2013-04-19 ValidFAA registration status code V: Valid registration. All codes
N220FT Robinson Helicopter
R22 BETA
Helicopter Technical Education Services INC T/A
Virginia Beach, Virginia
Standard 2013-04-18 ValidFAA registration status code V: Valid registration. All codes
N236RA Robinson Helicopter
R22 BETA
Helicopter Technical Education Services INC
Virginia Beach, Virginia
Standard 2013-04-18 ValidFAA registration status code V: Valid registration. All codes
N3825Q Cessna
172L
Fixed-wing, single engine Individual owner
California
Standard 2013-04-17 ValidFAA registration status code V: Valid registration. All codes
N84566 Cessna
172K
Fixed-wing, single engine Individual owner
Texas
Standard 2013-04-16 ValidFAA registration status code V: Valid registration. All codes
N3871X Aero Commander
100
Fixed-wing, single engine Individual owner
Oklahoma
Standard 2013-04-15 ValidFAA registration status code V: Valid registration. All codes
N811DW Piper
PA-18-150
Fixed-wing, single engine Individual owner
Alaska
Restricted 2013-04-12 ValidFAA registration status code V: Valid registration. All codes
N9562H Cessna
172M
Fixed-wing, single engine L & W Aircraft Investments LLC
Homestead, Florida
Standard 2013-04-12 ValidFAA registration status code V: Valid registration. All codes
N13522 Cessna
172M
Fixed-wing, single engine Individual owner
Arizona
Standard 2013-04-11 ValidFAA registration status code V: Valid registration. All codes
N5469L Grumman American Avn. Corp.
AA-5
Fixed-wing, single engine Individual owner
Ohio
Standard 2013-04-09 ValidFAA registration status code V: Valid registration. All codes
N6325D Cessna
172N
Fixed-wing, single engine Individual owner
Georgia
Standard 2013-04-09 ValidFAA registration status code V: Valid registration. All codes
N7743D Piper
PA-22-150
Fixed-wing, single engine Individual owner
Missouri
Standard 2013-04-09 ValidFAA registration status code V: Valid registration. All codes
N9390H Cessna
172M
Fixed-wing, single engine Co-owned owner
Oklahoma
Standard 2013-04-09 ValidFAA registration status code V: Valid registration. All codes
N9755D Cessna
172P
Fixed-wing, single engine Skyline Solutions INC
Deland, Florida
Standard 2013-04-09 ValidFAA registration status code V: Valid registration. All codes
N5521U Piper
PA-28-140
Fixed-wing, single engine Co-owned owner
Illinois
Standard 2013-04-08 ValidFAA registration status code V: Valid registration. All codes
N7024Q Cessna
172L
Fixed-wing, single engine Individual owner
Nebraska
Standard 2013-04-08 ValidFAA registration status code V: Valid registration. All codes
N75559 Cessna
172N
Fixed-wing, single engine Individual owner
Washington
Standard 2013-04-08 ValidFAA registration status code V: Valid registration. All codes
N30179 Cessna
177
Fixed-wing, single engine Individual owner
Georgia
Standard 2013-04-05 ValidFAA registration status code V: Valid registration. All codes
N3306E Cessna
172N
Fixed-wing, single engine Co-owned owner
Texas
Standard 2013-04-05 ValidFAA registration status code V: Valid registration. All codes
N2994Z Piper
PA-18-150
Fixed-wing, single engine Air Ads INC
El Cajon, California
Standard 2013-04-04 ValidFAA registration status code V: Valid registration. All codes
N654RV Wilkinson Glenn P
VANS AC RV-4
Fixed-wing, single engine Co-owned owner
Texas
Experimental 2013-04-04 ValidFAA registration status code V: Valid registration. All codes
N6776J Piper
PA-28-140
Fixed-wing, single engine Individual owner
North Carolina
Standard 2013-04-04 ValidFAA registration status code V: Valid registration. All codes
N75790 Cessna
172N
Fixed-wing, single engine Individual owner
Colorado
Standard 2013-04-04 ValidFAA registration status code V: Valid registration. All codes
N90783 Robinson Helicopter
R22
Helicopter Individual owner
Colorado
Standard 2013-04-04 ValidFAA registration status code V: Valid registration. All codes
N18ZB Piper
PA-18-150
Fixed-wing, single engine Individual owner
Alaska
Standard 2013-04-03 ValidFAA registration status code V: Valid registration. All codes
N6617H Cessna
172M
Fixed-wing, single engine North Franklin County Flying Club
North Lawrence, New York
Standard 2013-04-03 ValidFAA registration status code V: Valid registration. All codes
N8715D Piper
PA-22-160
Fixed-wing, single engine Co-owned owner
Arizona
Standard 2013-04-02 ValidFAA registration status code V: Valid registration. All codes
N9812W Piper
PA-28-140
Fixed-wing, single engine Co-owned owner
Delaware
Standard 2013-04-02 ValidFAA registration status code V: Valid registration. All codes
N19768 Cessna
172L
Fixed-wing, single engine Glacier Flight Training LLC
Whitefish, Montana
Standard 2013-04-01 ValidFAA registration status code V: Valid registration. All codes
N30098 Cessna
177
Fixed-wing, single engine Co-owned owner
Washington
Standard 2013-04-01 ValidFAA registration status code V: Valid registration. All codes
N55XF Piper
PA-28-140
Fixed-wing, single engine Ceb Enterprises LLC
Petal, Mississippi
Standard 2013-04-01 ValidFAA registration status code V: Valid registration. All codes
N83494 Piper
PA-18-150
Fixed-wing, single engine Individual owner
North Dakota
Multiple 2013-04-01 ValidFAA registration status code V: Valid registration. All codes
N9126L Champion
7GCBC
Fixed-wing, single engine Individual owner
North Dakota
Standard 2013-04-01 ValidFAA registration status code V: Valid registration. All codes
N6913B Piper
PA-22-150
Fixed-wing, single engine Individual owner
New Jersey
Standard 2013-03-29 ValidFAA registration status code V: Valid registration. All codes
N733FS Cessna
172N
Fixed-wing, single engine Arbach Enterprises INC
Watertown, South Dakota
Standard 2013-03-29 ValidFAA registration status code V: Valid registration. All codes
N6612L Piper
PA-18-150
Fixed-wing, single engine Individual owner
South Dakota
Standard 2013-03-28 ValidFAA registration status code V: Valid registration. All codes
N448ND Piper
PA-28-161
Fixed-wing, single engine Ari Ben Aviator INC
Fort Pierce, Florida
Standard 2013-03-27 ValidFAA registration status code V: Valid registration. All codes
N20756 Cessna
172M
Fixed-wing, single engine Individual owner
Texas
Standard 2013-03-26 ValidFAA registration status code V: Valid registration. All codes
N5437F Piper
PA-28-151
Fixed-wing, single engine Legacy Aviation LLC
Tea, South Dakota
Standard 2013-03-26 ValidFAA registration status code V: Valid registration. All codes
N56637 Piper
PA-28-140
Fixed-wing, single engine Individual owner
Washington
Standard 2013-03-26 ValidFAA registration status code V: Valid registration. All codes
N172NP Cessna
172N
Fixed-wing, single engine Dv Aviation INC
Brainerd, Minnesota
Standard 2013-03-25 ValidFAA registration status code V: Valid registration. All codes
N56241 Piper
PA-28-180
Fixed-wing, single engine Individual owner
Indiana
Standard 2013-03-22 ValidFAA registration status code V: Valid registration. All codes
N7940E Cessna
150
Fixed-wing, single engine Aircraft Guaranty CORP Trustee
Oklahoma City, Oklahoma
Standard 2013-03-22 ValidFAA registration status code V: Valid registration. All codes
N82071 Piper
PA-18-150
Fixed-wing, single engine Vintage Aircraft LLC
Leesville, South Carolina
Standard 2013-03-22 ValidFAA registration status code V: Valid registration. All codes
N2459J Piper
PA-18-150
Fixed-wing, single engine Individual owner
Oregon
Standard 2013-03-21 ValidFAA registration status code V: Valid registration. All codes
N7038Q Cessna
172L
Fixed-wing, single engine Individual owner
New York
Standard 2013-03-21 ValidFAA registration status code V: Valid registration. All codes
N12766 Cessna
172M
Fixed-wing, single engine Civil Air Patrol Flying Assoc INC
Branford, Connecticut
Standard 2013-03-20 ValidFAA registration status code V: Valid registration. All codes
N1704T Piper
PA-28-140
Fixed-wing, single engine Individual owner
South Carolina
Multiple 2013-03-20 ValidFAA registration status code V: Valid registration. All codes
N61727 Cessna
172M
Fixed-wing, single engine Individual owner
Texas
Standard 2013-03-20 ValidFAA registration status code V: Valid registration. All codes
N6885W Piper
PA-28-140
Fixed-wing, single engine Individual owner
Arizona
Standard 2013-03-20 ValidFAA registration status code V: Valid registration. All codes
N738PN Cessna
172N
Fixed-wing, single engine Papa November LLC
Orlando, Florida
Standard 2013-03-20 ValidFAA registration status code V: Valid registration. All codes
N9960U Grumman American Avn. Corp.
AA-5A
Fixed-wing, single engine Fletchair INC
Comfort, Texas
Standard 2013-03-20 ValidFAA registration status code V: Valid registration. All codes
N41457 Piper
PA-28-151
Fixed-wing, single engine Aviation Medical Experts LLC
Wilmington, Delaware
Standard 2013-03-18 ValidFAA registration status code V: Valid registration. All codes
N5334W Piper
PA-28
Fixed-wing, single engine Individual owner
Utah
Standard 2013-03-18 ValidFAA registration status code V: Valid registration. All codes
N56821 Piper
PA-28-140
Fixed-wing, single engine Cowlin Aviation LLC
Houston, Texas
Standard 2013-03-18 ValidFAA registration status code V: Valid registration. All codes
N46JW Cessna
172K
Fixed-wing, single engine Individual owner
Vermont
Standard 2013-03-15 ValidFAA registration status code V: Valid registration. All codes
N460FL Piper
PA-28-140
Fixed-wing, single engine Individual owner
California
Standard 2013-03-14 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 8, 2026. Horsepower and thrust are the FAA's figures for the series, not for a particular aircraft.