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
N62425 Cessna
172P
Fixed-wing, single engine Dodson International Parts INC
Rantoul, Kansas
Standard 2021-05-06 ValidFAA registration status code V: Valid registration. All codes
N73581 Cessna
172M
Fixed-wing, single engine Co-owned owner
Idaho
Standard 2021-05-06 ValidFAA registration status code V: Valid registration. All codes
N79276 Cessna
172K
Fixed-wing, single engine Co-owned owner
Virginia
Standard 2021-05-06 ValidFAA registration status code V: Valid registration. All codes
N113ME Bellanca
7GCBC
Fixed-wing, single engine Individual owner
Oregon
Standard 2021-05-05 ValidFAA registration status code V: Valid registration. All codes
N140NC Piper
PA-28-140
Fixed-wing, single engine Individual owner
Florida
Standard 2021-05-05 ValidFAA registration status code V: Valid registration. All codes
N15050 Piper
PA-28-140
Fixed-wing, single engine Individual owner
Maryland
Standard 2021-05-05 ValidFAA registration status code V: Valid registration. All codes
N4676F Piper
PA-28-151
Fixed-wing, single engine St Pete Aviation Services LLC
Saint Petersburg, Florida
Standard 2021-05-05 ValidFAA registration status code V: Valid registration. All codes
N5415L Grumman American Avn. Corp.
AA-5
Fixed-wing, single engine Individual owner
Louisiana
Standard 2021-05-05 ValidFAA registration status code V: Valid registration. All codes
N55374 Cessna
172P
Fixed-wing, single engine American Patrols INC
Midland, Texas
Standard 2021-05-05 ValidFAA registration status code V: Valid registration. All codes
N679RB Pace
THORP T-18
Fixed-wing, single engine Individual owner
Hawaii
Experimental 2021-05-05 ValidFAA registration status code V: Valid registration. All codes
N73419 Cessna
172M
Fixed-wing, single engine Cook Thomas M
Palmer, Alaska
Standard 2021-05-05 ValidFAA registration status code V: Valid registration. All codes
N7847D Piper
PA-22-150
Fixed-wing, single engine Individual owner
Alabama
Standard 2021-05-05 ValidFAA registration status code V: Valid registration. All codes
N78622 Cessna
172K
Fixed-wing, single engine Individual owner
Georgia
Standard 2021-05-05 ValidFAA registration status code V: Valid registration. All codes
N9647Q Cessna
172M
Fixed-wing, single engine Co-owned owner
California
Standard 2021-05-05 ValidFAA registration status code V: Valid registration. All codes
N9848J Cessna
172N
Fixed-wing, single engine Individual owner
California
Standard 2021-05-05 ValidFAA registration status code V: Valid registration. All codes
N33443 Piper
PA-28-140
Fixed-wing, single engine Warmsley Aviation LLC
Fort Washington, Maryland
Standard 2021-05-04 ValidFAA registration status code V: Valid registration. All codes
N7227J Piper
PA-28-140
Fixed-wing, single engine Rad Aviation LLC
Abbeville, Alabama
Standard 2021-05-04 ValidFAA registration status code V: Valid registration. All codes
N734KA Cessna
172N
Fixed-wing, single engine H&M Air LLC
Metamora, Michigan
Standard 2021-05-04 ValidFAA registration status code V: Valid registration. All codes
N80095 Cessna
172M
Fixed-wing, single engine Individual owner
Texas
Standard 2021-05-04 ValidFAA registration status code V: Valid registration. All codes
N854AC Cessna
172M
Fixed-wing, single engine Individual owner
California
Standard 2021-05-04 ValidFAA registration status code V: Valid registration. All codes
N15726 Piper
PA-28-140
Fixed-wing, single engine Aircraft Repair Center
Lake Worth, Florida
Standard 2021-05-03 ValidFAA registration status code V: Valid registration. All codes
N15984 Piper
PA-28-140
Fixed-wing, single engine Co-owned owner
Utah
Standard 2021-05-03 ValidFAA registration status code V: Valid registration. All codes
N2346Z Beech
23
Fixed-wing, single engine Southeast Equipment LLC
Sheridan, Wyoming
Standard 2021-05-03 ValidFAA registration status code V: Valid registration. All codes
N3783P Piper
PA-18A 150
Fixed-wing, single engine Individual owner
Washington
Multiple 2021-05-03 ValidFAA registration status code V: Valid registration. All codes
N4239Z Piper
PA-18-150
Fixed-wing, single engine Lsk Aviation CORP
Wilmington, Delaware
Standard 2021-05-03 ValidFAA registration status code V: Valid registration. All codes
N44314 Piper
PA-28-140
Fixed-wing, single engine Individual owner
California
Standard 2021-05-03 ValidFAA registration status code V: Valid registration. All codes
N7246J Piper
PA-28-140
Fixed-wing, single engine Individual owner
Texas
Standard 2021-05-03 ValidFAA registration status code V: Valid registration. All codes
N1089U Cessna
172M
Fixed-wing, single engine Jkg LLC
Murfreesboro, Tennessee
Standard 2021-05-01 ValidFAA registration status code V: Valid registration. All codes
N1ZA Piper
PA-18A 150
Fixed-wing, single engine Individual owner
Alaska
Standard 2021-05-01 ValidFAA registration status code V: Valid registration. All codes
N20196 Cessna
172M
Fixed-wing, single engine Individual owner
Washington
Standard 2021-05-01 ValidFAA registration status code V: Valid registration. All codes
N215FR Cessna
172N
Fixed-wing, single engine Jjg Aviation LLC
Miami, Florida
Standard 2021-05-01 ValidFAA registration status code V: Valid registration. All codes
N52747 Cessna
172P
Fixed-wing, single engine Unicorn Papa Air LLC
Longwood, Florida
Standard 2021-05-01 ValidFAA registration status code V: Valid registration. All codes
N62EE Broussard V Kenneth
RV-6
Fixed-wing, single engine Individual owner
Wyoming
Experimental 2021-05-01 ValidFAA registration status code V: Valid registration. All codes
N7147L Grumman American Avn. Corp.
AA-5
Fixed-wing, single engine Fletchair INC
Comfort, Texas
Standard 2021-05-01 ValidFAA registration status code V: Valid registration. All codes
N7416G Cessna
172K
Fixed-wing, single engine Individual owner
Florida
Standard 2021-05-01 ValidFAA registration status code V: Valid registration. All codes
N7863W Piper
PA-28-180
Fixed-wing, single engine Co-owned owner
Pennsylvania
Standard 2021-05-01 ValidFAA registration status code V: Valid registration. All codes
N8208N Piper
PA-28-140
Fixed-wing, single engine Mwh Consulting
Justin, Texas
Standard 2021-05-01 ValidFAA registration status code V: Valid registration. All codes
N39DB Champion
7GCBC
Fixed-wing, single engine Individual owner
Michigan
Standard 2021-04-30 ValidFAA registration status code V: Valid registration. All codes
N5982U Piper
PA-28-140
Fixed-wing, single engine Capital Aviation LLC
Fuquay Varina, North Carolina
Standard 2021-04-30 ValidFAA registration status code V: Valid registration. All codes
N9636H Cessna
172M
Fixed-wing, single engine Individual owner
Puerto Rico
Standard 2021-04-30 ValidFAA registration status code V: Valid registration. All codes
N9945Q Cessna
172M
Fixed-wing, single engine Classic Air Aviation LLC
Mesa, Arizona
Standard 2021-04-30 ValidFAA registration status code V: Valid registration. All codes
N3521M Piper
PA-28-161
Fixed-wing, single engine Individual owner
Texas
Standard 2021-04-29 ValidFAA registration status code V: Valid registration. All codes
N7020Q Cessna
172L
Fixed-wing, single engine Aufderheide Flying Service INC
De Witt, Arkansas
Standard 2021-04-29 ValidFAA registration status code V: Valid registration. All codes
N73686 Cessna
172N
Fixed-wing, single engine Falcon Aviation INC
Farmington Hills, Michigan
Standard 2021-04-29 ValidFAA registration status code V: Valid registration. All codes
N812DA Cessna
172N
Fixed-wing, single engine Hanson Aviation LLC
Winter Park, Florida
Standard 2021-04-29 ValidFAA registration status code V: Valid registration. All codes
N177SK Cessna
177
Fixed-wing, single engine Hartwig Lonnie D
Edgeley, North Dakota
Standard 2021-04-28 ValidFAA registration status code V: Valid registration. All codes
N33EC Piper
PA-28-140
Fixed-wing, single engine Mccammon Aviation LLC
Sullivan, Indiana
Standard 2021-04-28 ValidFAA registration status code V: Valid registration. All codes
N91338 Piper
PA-28-161
Fixed-wing, single engine Kejair LLC
San Francisco, California
Standard 2021-04-28 ValidFAA registration status code V: Valid registration. All codes
N1898J Piper
PA-28-140
Fixed-wing, single engine Co-owned owner
Florida
Standard 2021-04-27 ValidFAA registration status code V: Valid registration. All codes
N437WY Howell James W
RV-4
Fixed-wing, single engine Individual owner
Wyoming
Experimental 2021-04-27 ValidFAA registration status code V: Valid registration. All codes
N56MW Cessna
172M
Fixed-wing, single engine Heartland AG Aviation LLC
Lancaster, Kansas
Standard 2021-04-27 ValidFAA registration status code V: Valid registration. All codes
N9530W Piper
PA-28-140
Fixed-wing, single engine Gateway Flight Training LLC
Saint Louis, Missouri
Standard 2021-04-27 ValidFAA registration status code V: Valid registration. All codes
N32291 Piper
PA-28-151
Fixed-wing, single engine Active Pilot INC
Van Nuys, California
Standard 2021-04-26 ValidFAA registration status code V: Valid registration. All codes
N335RS Cessna
172N
Fixed-wing, single engine Co-owned owner
Alaska
Standard 2021-04-26 ValidFAA registration status code V: Valid registration. All codes
N3882Z Piper
PA-18-150
Fixed-wing, single engine Individual owner
Alaska
Multiple 2021-04-26 ValidFAA registration status code V: Valid registration. All codes
N46346 Cessna
172K
Fixed-wing, single engine Withheld at owner's request
Standard 2021-04-26 ValidFAA registration status code V: Valid registration. All codes
N61GA Cessna
172P
Fixed-wing, single engine Glidewell Aviation INC
Parkland, Florida
Standard 2021-04-26 ValidFAA registration status code V: Valid registration. All codes
N703CA Piper
PA-28-161
Fixed-wing, single engine Flying Penguin Aviation LLC
Atlanta, Georgia
Standard 2021-04-26 ValidFAA registration status code V: Valid registration. All codes
N74DM Cessna
172M
Fixed-wing, single engine T C Rian Association LLC
Grove, Oklahoma
Standard 2021-04-26 ValidFAA registration status code V: Valid registration. All codes
N7829G Cessna
172L
Fixed-wing, single engine Kilo Sierra Aviation LLC
Sammamish, Washington
Standard 2021-04-26 ValidFAA registration status code V: Valid registration. All codes
N9217D Piper
PA-22-160
Fixed-wing, single engine Individual owner
Alaska
Standard 2021-04-26 ValidFAA registration status code V: Valid registration. All codes
N1963W Beech
B19
Fixed-wing, single engine Co-owned owner
California
Standard 2021-04-24 ValidFAA registration status code V: Valid registration. All codes
N6194D Cessna
172N
Fixed-wing, single engine Bha Leasing CORP
South Portland, Maine
Standard 2021-04-24 ValidFAA registration status code V: Valid registration. All codes
N739FY Cessna
172N
Fixed-wing, single engine Sanford Aircraft LLC
Winter Springs, Florida
Standard 2021-04-24 ValidFAA registration status code V: Valid registration. All codes
N24006 Beech
B19
Fixed-wing, single engine Individual owner
Texas
Standard 2021-04-23 ValidFAA registration status code V: Valid registration. All codes
N5297B Mooney Aircraft Corp.
M20
Fixed-wing, single engine Individual owner
Colorado
Standard 2021-04-23 ValidFAA registration status code V: Valid registration. All codes
N5480K Cessna
172P
Fixed-wing, single engine American Patrols INC
Midland, Texas
Standard 2021-04-23 ValidFAA registration status code V: Valid registration. All codes
N5980W Piper
PA-28-150
Fixed-wing, single engine Individual owner
Arizona
Standard 2021-04-23 ValidFAA registration status code V: Valid registration. All codes
N734TL Cessna
172N
Fixed-wing, single engine Co-owned owner
Texas
Standard 2021-04-23 ValidFAA registration status code V: Valid registration. All codes
N7866Z Cessna
150C
Fixed-wing, single engine Individual owner
Kansas
Standard 2021-04-23 ValidFAA registration status code V: Valid registration. All codes
N14JR Bellanca
7GCBC
Fixed-wing, single engine Aerial Reconnaissance INC
Trent Woods, North Carolina
Standard 2021-04-22 ValidFAA registration status code V: Valid registration. All codes
N5706W Piper
PA-28-150
Fixed-wing, single engine Individual owner
Colorado
Standard 2021-04-22 ValidFAA registration status code V: Valid registration. All codes
N5783U Piper
PA-28-140
Fixed-wing, single engine Co-owned owner
Nevada
Standard 2021-04-22 ValidFAA registration status code V: Valid registration. All codes
N23TG Greaves Thomas W
RV-4
Fixed-wing, single engine Individual owner
Tennessee
Experimental 2021-04-21 ValidFAA registration status code V: Valid registration. All codes
N5102E Cessna
172N
Fixed-wing, single engine Cag Aircraft Holdings LLC
Crystal River, Florida
Standard 2021-04-21 ValidFAA registration status code V: Valid registration. All codes
N528FL Piper
PA-28-140
Fixed-wing, single engine Individual owner
California
Standard 2021-04-21 ValidFAA registration status code V: Valid registration. All codes
N54466 Piper
PA-28-140
Fixed-wing, single engine Individual owner
New Jersey
Standard 2021-04-21 ValidFAA registration status code V: Valid registration. All codes
N57628 Bellanca
7GCBC
Fixed-wing, single engine Individual owner
Kansas
Standard 2021-04-21 ValidFAA registration status code V: Valid registration. All codes
N6158G Cessna
172N
Fixed-wing, single engine Cag Aircraft Holdings LLC
Crystal River, Florida
Standard 2021-04-21 ValidFAA registration status code V: Valid registration. All codes
N6806W Piper
PA-28-140
Fixed-wing, single engine Wings Up LLC
Saint Augustine, Florida
Standard 2021-04-21 ValidFAA registration status code V: Valid registration. All codes
N734TU Cessna
172N
Fixed-wing, single engine Individual owner
California
Standard 2021-04-21 ValidFAA registration status code V: Valid registration. All codes
N737HW Cessna
172N
Fixed-wing, single engine Cag Aircraft Holdings LLC
Crystal River, Florida
Standard 2021-04-21 ValidFAA registration status code V: Valid registration. All codes
N7393G Cessna
172K
Fixed-wing, single engine Blue Wings LLC
Brecksville, Ohio
Standard 2021-04-21 ValidFAA registration status code V: Valid registration. All codes
N9608H Cessna
172M
Fixed-wing, single engine Cag Aircraft Holdings LLC
Crystal River, Florida
Standard 2021-04-21 ValidFAA registration status code V: Valid registration. All codes
N123WC Piper
PA-22-150
Fixed-wing, single engine Individual owner
Wisconsin
Standard 2021-04-20 ValidFAA registration status code V: Valid registration. All codes
N224EL Piper
PA-28-161
Fixed-wing, single engine Nrcme Training Systems LLC
Breese, Illinois
Standard 2021-04-20 ValidFAA registration status code V: Valid registration. All codes
N140L Piper
PA-28-140
Fixed-wing, single engine Individual owner
Minnesota
Standard 2021-04-19 ValidFAA registration status code V: Valid registration. All codes
N19792 Cessna
172L
Fixed-wing, single engine Individual owner
Maine
Standard 2021-04-19 ValidFAA registration status code V: Valid registration. All codes
N2010Z Piper
PA-28-140
Fixed-wing, single engine Individual owner
California
Standard 2021-04-19 ValidFAA registration status code V: Valid registration. All codes
N268S Steckler Stephen T
VANS RV-8A
Fixed-wing, single engine Individual owner
Ohio
Experimental 2021-04-19 ValidFAA registration status code V: Valid registration. All codes
N2848P Piper
PA-22-150
Fixed-wing, single engine Individual owner
Tennessee
Standard 2021-04-19 ValidFAA registration status code V: Valid registration. All codes
N611VW Piper
PA-28-140
Fixed-wing, single engine Individual owner
Utah
Standard 2021-04-19 ValidFAA registration status code V: Valid registration. All codes
N6886W Piper
PA-28-140
Fixed-wing, single engine Individual owner
Mississippi
Standard 2021-04-19 ValidFAA registration status code V: Valid registration. All codes
N694BA Aero Sport Inc
EMERAUDE
Fixed-wing, single engine Individual owner
Pennsylvania
Experimental 2021-04-19 ValidFAA registration status code V: Valid registration. All codes
N738VR Cessna
172N
Fixed-wing, single engine Individual owner
Oklahoma
Standard 2021-04-19 ValidFAA registration status code V: Valid registration. All codes
N8482Y Piper
PA-18-150
Fixed-wing, single engine Individual owner
Tennessee
Standard 2021-04-19 ValidFAA registration status code V: Valid registration. All codes
N1632J Piper
PA-28-140
Fixed-wing, single engine Individual owner
Oklahoma
Standard 2021-04-17 ValidFAA registration status code V: Valid registration. All codes
N2669T Piper
PA-28-140
Fixed-wing, single engine City of Westfield
Westfield, Massachusetts
Standard 2021-04-17 ValidFAA registration status code V: Valid registration. All codes
N3972K Piper
PA-28-140
Fixed-wing, single engine Co-owned owner
Kentucky
Standard 2021-04-17 ValidFAA registration status code V: Valid registration. All codes
N5473H Piper
PA-18-105 SPECIAL
Fixed-wing, single engine Individual owner
Minnesota
Restricted 2021-04-17 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.