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
N1594U Cessna
172M
Fixed-wing, single engine Individual owner
South Carolina
Standard 2025-02-05 ValidFAA registration status code V: Valid registration. All codes
N2526W Wassom Warren Clarke
RV-6A
Fixed-wing, single engine Individual owner
Florida
Experimental 2025-02-05 ValidFAA registration status code V: Valid registration. All codes
N2883T Piper
PA-28-140
Fixed-wing, single engine Individual owner
Pennsylvania
Standard 2025-02-05 ValidFAA registration status code V: Valid registration. All codes
N3991X Piper
PA-28-151
Fixed-wing, single engine Packaging Plus INC
Fishers, Indiana
Standard 2025-02-05 ValidFAA registration status code V: Valid registration. All codes
N61630 Cessna
172M
Fixed-wing, single engine Co-owned owner
Montana
Standard 2025-02-05 ValidFAA registration status code V: Valid registration. All codes
N733WT Cessna
172N
Fixed-wing, single engine Anderson Aviation Services INC
Carlsbad, California
Standard 2025-02-05 ValidFAA registration status code V: Valid registration. All codes
N55563 Piper
PA-28-140
Fixed-wing, single engine Individual owner
Texas
Standard 2025-02-04 ValidFAA registration status code V: Valid registration. All codes
N57517 Bellanca
7GCBC
Fixed-wing, single engine Du Aircraft Leasing
Green Bay, Wisconsin
Standard 2025-02-04 ValidFAA registration status code V: Valid registration. All codes
N7135Q Cessna
172L
Fixed-wing, single engine Individual owner
Iowa
Standard 2025-02-04 ValidFAA registration status code V: Valid registration. All codes
N8224N Piper
PA-28-140
Fixed-wing, single engine Dc Aviation LLC
Appleton, Wisconsin
Standard 2025-02-04 ValidFAA registration status code V: Valid registration. All codes
N1193M Cessna
172K
Fixed-wing, single engine Eagle Sky Patrol INC
Deadwood, South Dakota
Standard 2025-02-03 ValidFAA registration status code V: Valid registration. All codes
N1330T Piper
PA-28-140
Fixed-wing, single engine Premium Air LLC
Bloomfield, Michigan
Standard 2025-02-03 ValidFAA registration status code V: Valid registration. All codes
N200DM Mc Manus Jack
WAGAERO SPTSMAN 2+2
Fixed-wing, single engine Individual owner
Alaska
Standard 2025-02-03 ValidFAA registration status code V: Valid registration. All codes
N21588 Cessna
172M
Fixed-wing, single engine Jackson Hole Airport Board
Jackson, Wyoming
Standard 2025-02-03 ValidFAA registration status code V: Valid registration. All codes
N3996Q Cessna
172L
Fixed-wing, single engine Individual owner
Florida
Standard 2025-02-03 ValidFAA registration status code V: Valid registration. All codes
N3RW Cessna
172N
Fixed-wing, single engine Individual owner
Massachusetts
Standard 2025-02-03 ValidFAA registration status code V: Valid registration. All codes
N4242Q Cessna
172L
Fixed-wing, single engine Withheld at owner's request
Standard 2025-02-03 ValidFAA registration status code V: Valid registration. All codes
N54421 Piper
PA-28-151
Fixed-wing, single engine Individual owner
Texas
Standard 2025-02-03 ValidFAA registration status code V: Valid registration. All codes
N5628W Piper
PA-28-160
Fixed-wing, single engine B & D Aviators LLC
Bremen, Indiana
Standard 2025-02-03 ValidFAA registration status code V: Valid registration. All codes
N665GA Cessna
172N
Fixed-wing, single engine Flight Club 502 INC
Louisville, Kentucky
Standard 2025-02-03 ValidFAA registration status code V: Valid registration. All codes
N1188M Cessna
172K
Fixed-wing, single engine Trim Tab LLC
Fort Collins, Colorado
Standard 2025-02-01 ValidFAA registration status code V: Valid registration. All codes
N339T Piper
PA-18 105
Fixed-wing, single engine Individual owner
Alaska
Restricted 2025-02-01 ValidFAA registration status code V: Valid registration. All codes
N55KE Ellis Keith W
RV-6
Fixed-wing, single engine Co-owned owner
Washington
Experimental 2025-02-01 ValidFAA registration status code V: Valid registration. All codes
N9653U Grumman American Avn. Corp.
AA-5A
Fixed-wing, single engine Individual owner
Wisconsin
Standard 2025-02-01 ValidFAA registration status code V: Valid registration. All codes
N12516 Cessna
172M
Fixed-wing, single engine Individual owner
Texas
Standard 2025-01-31 ValidFAA registration status code V: Valid registration. All codes
N1958P Piper
PA-22-160
Fixed-wing, single engine Individual owner
Florida
Standard 2025-01-31 ValidFAA registration status code V: Valid registration. All codes
N75871 Cessna
172N
Fixed-wing, single engine Blue Wing Flyer LLC
Marietta, Georgia
Standard 2025-01-31 ValidFAA registration status code V: Valid registration. All codes
N8236N Piper
PA-28-140
Fixed-wing, single engine 8Asplanes LLC
Lewes, Delaware
Standard 2025-01-31 ValidFAA registration status code V: Valid registration. All codes
N8856N Piper
PA-28-140
Fixed-wing, single engine Co-owned owner
Florida
Standard 2025-01-31 ValidFAA registration status code V: Valid registration. All codes
N12830 Cessna
172M
Fixed-wing, single engine All Sports Aviation LLC
Spokane, Washington
Standard 2025-01-30 ValidFAA registration status code V: Valid registration. All codes
N15868 Piper
PA-28-140
Fixed-wing, single engine Mogan & White INC
New York, New York
Standard 2025-01-30 ValidFAA registration status code V: Valid registration. All codes
N222BK Cessna
172N
Fixed-wing, single engine Deralex Airways LLC
Miami, Florida
Standard 2025-01-30 ValidFAA registration status code V: Valid registration. All codes
N2242P Robinson Helicopter
R22 ALPHA
Helicopter Individual owner
Washington
Standard 2025-01-30 ValidFAA registration status code V: Valid registration. All codes
N3RX Cessna
172M
Fixed-wing, single engine Individual owner
Illinois
Standard 2025-01-30 ValidFAA registration status code V: Valid registration. All codes
N4463J Piper
PA-28-140
Fixed-wing, single engine Flying Hawks INC
Palmyra, Wisconsin
Standard 2025-01-30 ValidFAA registration status code V: Valid registration. All codes
N45552 Piper
PA-18-150
Fixed-wing, single engine Aerospace Trust Management LLC Trustee
Wilmington, Delaware
Standard 2025-01-30 ValidFAA registration status code V: Valid registration. All codes
N5321W Piper
PA-28
Fixed-wing, single engine Individual owner
Ohio
Standard 2025-01-30 ValidFAA registration status code V: Valid registration. All codes
N72EB American Champion Aircraft
7GCBC
Fixed-wing, single engine Vector Airmotive LLC
Frisco, Texas
Standard 2025-01-30 ValidFAA registration status code V: Valid registration. All codes
N13164 Cessna
172M
Fixed-wing, single engine Co-owned owner
Texas
Standard 2025-01-29 ValidFAA registration status code V: Valid registration. All codes
N1317T Piper
PA-28-140
Fixed-wing, single engine Individual owner
Georgia
Standard 2025-01-29 ValidFAA registration status code V: Valid registration. All codes
N175W Piper
PA-22-150
Fixed-wing, single engine Co-owned owner
Missouri
Standard 2025-01-29 ValidFAA registration status code V: Valid registration. All codes
N44452 Piper
PA-28-140
Fixed-wing, single engine Cdr Aviation LLC
Kalispell, Montana
Standard 2025-01-29 ValidFAA registration status code V: Valid registration. All codes
N60BZ Evens
THORP T-18
Fixed-wing, single engine Nxbz Aircraft Holdings LLC
Broussard, Louisiana
Experimental 2025-01-29 ValidFAA registration status code V: Valid registration. All codes
N6267Z Piper
PA-25
Fixed-wing, single engine Individual owner
Texas
Restricted 2025-01-29 ValidFAA registration status code V: Valid registration. All codes
N65KD Cessna
172M
Fixed-wing, single engine Northwest Wings LLC
Hillsboro, Oregon
Standard 2025-01-29 ValidFAA registration status code V: Valid registration. All codes
N6858H Cessna
172M
Fixed-wing, single engine Prairie Skies Aviation LLC
Hutchinson, Kansas
Standard 2025-01-29 ValidFAA registration status code V: Valid registration. All codes
N7020R Piper
PA-28-140
Fixed-wing, single engine Jwe Aviation LLC
Sugar Hill, Georgia
Standard 2025-01-29 ValidFAA registration status code V: Valid registration. All codes
N7206F Piper
PA-28-140
Fixed-wing, single engine Voyage Capital Ventures LLC
Knightdale, North Carolina
Standard 2025-01-29 ValidFAA registration status code V: Valid registration. All codes
N8158N Piper
PA-28-140
Fixed-wing, single engine Horizon Aviation LLC
Brooks, Georgia
Standard 2025-01-29 ValidFAA registration status code V: Valid registration. All codes
N9592D Piper
PA-22-160
Fixed-wing, single engine Individual owner
Oklahoma
Standard 2025-01-29 ValidFAA registration status code V: Valid registration. All codes
N9725U Grumman American Avn. Corp.
AA-5A
Fixed-wing, single engine Individual owner
Pennsylvania
Standard 2025-01-29 ValidFAA registration status code V: Valid registration. All codes
N313BL Cessna
172M
Fixed-wing, single engine Co-owned owner
Maine
Standard 2025-01-28 ValidFAA registration status code V: Valid registration. All codes
N4046A Robinson Helicopter
R22 BETA
Helicopter N7047X-R22 LLC
Wilmington, Delaware
Standard 2025-01-28 ValidFAA registration status code V: Valid registration. All codes
N4117J Piper
PA-28-140
Fixed-wing, single engine Co-owned owner
Missouri
Standard 2025-01-28 ValidFAA registration status code V: Valid registration. All codes
N75591 Cessna
172N
Fixed-wing, single engine Individual owner
Texas
Multiple 2025-01-28 ValidFAA registration status code V: Valid registration. All codes
N3206E Cessna
172N
Fixed-wing, single engine Morey Airplane Company INC
Middleton, Wisconsin
Standard 2025-01-27 ValidFAA registration status code V: Valid registration. All codes
N3363E Cessna
172N
Fixed-wing, single engine Mcfly LLC
Casper, Wyoming
Standard 2025-01-27 ValidFAA registration status code V: Valid registration. All codes
N5105X Champion
7GCBC
Fixed-wing, single engine Manairco INC
Wooster, Ohio
Standard 2025-01-27 ValidFAA registration status code V: Valid registration. All codes
N53838 Bellanca
8KCAB
Fixed-wing, single engine Euroaviation INC Trustee
Kematen,
Standard 2025-01-27 ValidFAA registration status code V: Valid registration. All codes
N739CD Cessna
172N
Fixed-wing, single engine Kcsi Aerial Patrol INC
Bakersfield, California
Standard 2025-01-27 ValidFAA registration status code V: Valid registration. All codes
N9753W Piper
PA-28-140
Fixed-wing, single engine Individual owner
Wisconsin
Standard 2025-01-27 ValidFAA registration status code V: Valid registration. All codes
N333KN Cessna
172M
Fixed-wing, single engine Kris Noone Air LLC
Wilmington, Delaware
Standard 2025-01-26 ValidFAA registration status code V: Valid registration. All codes
N9755W Piper
PA-28-140
Fixed-wing, single engine Co-owned owner
Alaska
Standard 2025-01-26 ValidFAA registration status code V: Valid registration. All codes
N5712U Piper
PA-28-140
Fixed-wing, single engine Individual owner
California
Standard 2025-01-25 ValidFAA registration status code V: Valid registration. All codes
N6029D Piper
PA-22-150
Fixed-wing, single engine Individual owner
Oregon
Standard 2025-01-25 ValidFAA registration status code V: Valid registration. All codes
N5522U Piper
PA-28-140
Fixed-wing, single engine Individual owner
Wisconsin
Standard 2025-01-24 ValidFAA registration status code V: Valid registration. All codes
N55899 Piper
PA-28-140
Fixed-wing, single engine Aerospace Trust Management LLC Trustee
Wilmington, Delaware
Standard 2025-01-24 ValidFAA registration status code V: Valid registration. All codes
N838S Piper
PA-18-150
Fixed-wing, single engine Individual owner
Louisiana
Standard 2025-01-24 ValidFAA registration status code V: Valid registration. All codes
N121PG Cobra Aero Ltd
VAN'S RV-7-A
Fixed-wing, single engine Individual owner
New Jersey
Experimental 2025-01-22 ValidFAA registration status code V: Valid registration. All codes
N172TC Cessna
172M
Fixed-wing, single engine Meweber Consulting INC
Atlanta, Michigan
Standard 2025-01-22 ValidFAA registration status code V: Valid registration. All codes
N2395Y Cessna
177
Fixed-wing, single engine Individual owner
California
Standard 2025-01-22 ValidFAA registration status code V: Valid registration. All codes
N23TM Messeder Thomas A
PITTS S1S
Fixed-wing, single engine Individual owner
Ohio
Experimental 2025-01-22 ValidFAA registration status code V: Valid registration. All codes
N3330E Cessna
172N
Fixed-wing, single engine Jarco Air LLC
Fitchburg, Massachusetts
Standard 2025-01-22 ValidFAA registration status code V: Valid registration. All codes
N388JF Cessna
172P
Fixed-wing, single engine Aspire Aviation LLC
Farmingdale, New York
Standard 2025-01-22 ValidFAA registration status code V: Valid registration. All codes
N516AC American Champion Aircraft
7GCBC
Fixed-wing, single engine 39 Victor Aviation INC
Macomb, Illinois
Standard 2025-01-22 ValidFAA registration status code V: Valid registration. All codes
N53746 Bellanca
7KCAB
Fixed-wing, single engine Apollo 18 LLC
Tipp City, Ohio
Standard 2025-01-22 ValidFAA registration status code V: Valid registration. All codes
N6384D Cessna
172N
Fixed-wing, single engine N2893E LLC
Reno, Nevada
Standard 2025-01-22 ValidFAA registration status code V: Valid registration. All codes
N738PD Cessna
172N
Fixed-wing, single engine Individual owner
Virginia
Standard 2025-01-22 ValidFAA registration status code V: Valid registration. All codes
N9613W Piper
PA-28-140
Fixed-wing, single engine Air Wilma LLC
Tijeras, New Mexico
Standard 2025-01-22 ValidFAA registration status code V: Valid registration. All codes
N124RC Cessna
172K
Fixed-wing, single engine Ec Aviation INC
Stockbridge, Georgia
Standard 2025-01-21 ValidFAA registration status code V: Valid registration. All codes
N1430V Cessna
172M
Fixed-wing, single engine Stillwater Aviation LLC
Winter Haven, Florida
Standard 2025-01-21 ValidFAA registration status code V: Valid registration. All codes
N15489 Piper
PA-28-140
Fixed-wing, single engine Black Knights Transportation Services LLC
Garden Grove, California
Standard 2025-01-21 ValidFAA registration status code V: Valid registration. All codes
N2404P Piper
PA-18-150
Fixed-wing, single engine Individual owner
Nevada
Standard 2025-01-21 ValidFAA registration status code V: Valid registration. All codes
N277CB Cessna
172M
Fixed-wing, single engine N277Cb LLC
Jacksonville, Florida
Standard 2025-01-21 ValidFAA registration status code V: Valid registration. All codes
N38692 Piper
PA-28-140
Fixed-wing, single engine Individual owner
Florida
Standard 2025-01-21 ValidFAA registration status code V: Valid registration. All codes
N8236G Cessna
172N
Fixed-wing, single engine Individual owner
Nebraska
Standard 2025-01-21 ValidFAA registration status code V: Valid registration. All codes
N99BA Rutan
LONG-EZ
Fixed-wing, single engine International Air Services INC Trustee
Carson City, Nevada
Experimental 2025-01-21 ValidFAA registration status code V: Valid registration. All codes
N5346D Cessna
172N
Fixed-wing, single engine Boldflight LLC
Greenwood, Indiana
Standard 2025-01-20 ValidFAA registration status code V: Valid registration. All codes
N6453R Piper
PA-28-140
Fixed-wing, single engine Individual owner
Ohio
Standard 2025-01-20 ValidFAA registration status code V: Valid registration. All codes
N9786P Piper
PA-18-150
Fixed-wing, single engine Co-owned owner
Alaska
Restricted 2025-01-20 ValidFAA registration status code V: Valid registration. All codes
N37735 Helsel William R
MARQUART MA5 CHARGER
Fixed-wing, single engine Individual owner
Florida
Experimental 2025-01-18 ValidFAA registration status code V: Valid registration. All codes
N41639 Piper
PA-28-151
Fixed-wing, single engine Airmotive Service LLC
Brigham City, Utah
Standard 2025-01-18 ValidFAA registration status code V: Valid registration. All codes
N5993Z Piper
PA-18-150
Fixed-wing, single engine Individual owner
Alaska
Standard 2025-01-18 ValidFAA registration status code V: Valid registration. All codes
N65624 Cessna
172P
Fixed-wing, single engine Individual owner
Florida
Standard 2025-01-18 ValidFAA registration status code V: Valid registration. All codes
N3545K Piper
PA-28-140
Fixed-wing, single engine Mil2Atp INC
Pikeville, North Carolina
Standard 2025-01-17 ValidFAA registration status code V: Valid registration. All codes
N35519 Cessna
172I
Fixed-wing, single engine Individual owner
Utah
Standard 2025-01-17 ValidFAA registration status code V: Valid registration. All codes
N4841D Cessna
172N
Fixed-wing, single engine Doorglobe INC
San Francisco, California
Standard 2025-01-17 ValidFAA registration status code V: Valid registration. All codes
N8408R Piper
PA-28-140
Fixed-wing, single engine Co-owned owner
Washington
Standard 2025-01-17 ValidFAA registration status code V: Valid registration. All codes
N9071D Piper
PA-18A 150
Fixed-wing, single engine Individual owner
Alaska
Standard 2025-01-17 ValidFAA registration status code V: Valid registration. All codes
N5037R Cessna
172M
Fixed-wing, single engine Jlinn Aviation INC
Quinlan, Texas
Standard 2025-01-16 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.