The U.S. aircraft register, updated daily
Engines · piston (reciprocating) · data as of October 7, 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

These connections as data: /graph/engine/lycoming-o-320-series.json · about the eFlight graph.

Aircraft newest certificates first · 27,315

Tail no.Maker and modelGroupOwner and baseCertificateRegisteredStatus
N4044M Piper
PA-12
Fixed-wing, single engine Red Baron LLC
Kenai, Alaska
Restricted 2025-05-30 ValidFAA registration status code V: Valid registration. All codes
N61770 Cessna
172M
Fixed-wing, single engine Mwbw LLC
Shawano, Wisconsin
Standard 2025-05-30 ValidFAA registration status code V: Valid registration. All codes
N492AC Crimmins Arthur
SIDEWINDER
Fixed-wing, single engine Co-owned owner
Nevada
Experimental 2025-05-29 ValidFAA registration status code V: Valid registration. All codes
N737ML Cessna
172N
Fixed-wing, single engine Wings Over Texas Holdings LLC
Denton, Texas
Standard 2025-05-29 ValidFAA registration status code V: Valid registration. All codes
N8867N Piper
PA-28-140
Fixed-wing, single engine Co-owned owner
Tennessee
Standard 2025-05-29 ValidFAA registration status code V: Valid registration. All codes
N8334Y Piper
PA-28-161
Fixed-wing, single engine Oncore Aviation LLC
Rochester, New York
Standard 2025-05-28 ValidFAA registration status code V: Valid registration. All codes
N12469 Cessna
172M
Fixed-wing, single engine Individual owner
Washington
Standard 2025-05-27 ValidFAA registration status code V: Valid registration. All codes
N1455V Cessna
172M
Fixed-wing, single engine Staples Aviation INC
Stormville, New York
Standard 2025-05-27 ValidFAA registration status code V: Valid registration. All codes
N2371P Piper
PA-22-150
Fixed-wing, single engine Individual owner
California
Standard 2025-05-27 ValidFAA registration status code V: Valid registration. All codes
N423FL Piper
PA-28-140
Fixed-wing, single engine Co-owned owner
Wisconsin
Standard 2025-05-27 ValidFAA registration status code V: Valid registration. All codes
N4327Q Cessna
172L
Fixed-wing, single engine Fackler Aviation Services LLC
Clearwater, Florida
Standard 2025-05-27 ValidFAA registration status code V: Valid registration. All codes
N6388D Cessna
172N
Fixed-wing, single engine Bdo Aviation LLC
Dallas, Texas
Standard 2025-05-27 ValidFAA registration status code V: Valid registration. All codes
N7738Y Piper
PA-30
Fixed-wing, multi-engine Co-owned owner
California
Standard 2025-05-27 ValidFAA registration status code V: Valid registration. All codes
N8071N Piper
PA-28-140
Fixed-wing, single engine Individual owner
Arizona
Standard 2025-05-27 ValidFAA registration status code V: Valid registration. All codes
N8713C Piper
PA-28-140
Fixed-wing, single engine Individual owner
Washington
Standard 2025-05-27 ValidFAA registration status code V: Valid registration. All codes
N8826N Piper
PA-28-140
Fixed-wing, single engine Wg Aviation LLC
Shippenville, Pennsylvania
Standard 2025-05-27 ValidFAA registration status code V: Valid registration. All codes
N9562V Cessna
172M
Fixed-wing, single engine Winged Winds LLC
Douglassville, Pennsylvania
Standard 2025-05-27 ValidFAA registration status code V: Valid registration. All codes
N20050 Cessna
172M
Fixed-wing, single engine Florida Keys Flight Academy LLC
Marathon, Florida
Standard 2025-05-24 ValidFAA registration status code V: Valid registration. All codes
N5100G Cessna
172N
Fixed-wing, single engine Aero Leasing LLC
Snohomish, Washington
Standard 2025-05-24 ValidFAA registration status code V: Valid registration. All codes
N204KK Robinson Helicopter
R22 BETA
Helicopter Individual owner
Alaska
Standard 2025-05-23 ValidFAA registration status code V: Valid registration. All codes
N2514Z Bellanca
7GCBC
Fixed-wing, single engine Darnoc LLC - Series 6
Spicewood, Texas
Standard 2025-05-23 ValidFAA registration status code V: Valid registration. All codes
N5470K Cessna
172P
Fixed-wing, single engine Skye Aircraft LLC
Deland, Florida
Standard 2025-05-23 ValidFAA registration status code V: Valid registration. All codes
N5529U Piper
PA-28-140
Fixed-wing, single engine Individual owner
Missouri
Standard 2025-05-23 ValidFAA registration status code V: Valid registration. All codes
N737VN Cessna
172N
Fixed-wing, single engine Redstone Arsenal Flying Activity
Redstone Arsenal, Alabama
Standard 2025-05-23 ValidFAA registration status code V: Valid registration. All codes
N918VP Cessna
172M
Fixed-wing, single engine Vanderpool Robert W
Red Devil, Alaska
Standard 2025-05-23 ValidFAA registration status code V: Valid registration. All codes
N1377M Cessna
172L
Fixed-wing, single engine Buiqui Aerospace CORP
Kissimmee, Florida
Standard 2025-05-22 ValidFAA registration status code V: Valid registration. All codes
N157DF Cessna
172L
Fixed-wing, single engine 157Df LLC
Madison, Wisconsin
Standard 2025-05-22 ValidFAA registration status code V: Valid registration. All codes
N26AD Lancour Arthur
RV6
Fixed-wing, single engine Tango Aviation LLC
Valrico, Florida
Experimental 2025-05-22 ValidFAA registration status code V: Valid registration. All codes
N32684 Piper
PA-28-140
Fixed-wing, single engine Appalachian Aerospace LLC
Wilmington, Delaware
Standard 2025-05-22 ValidFAA registration status code V: Valid registration. All codes
N3982Z Piper
PA-18S-150
Fixed-wing, single engine Dubious Adventures LLC
Big Lake, Alaska
Standard 2025-05-22 ValidFAA registration status code V: Valid registration. All codes
N4323Z Piper
PA-18-150
Fixed-wing, single engine Dubious Adventures LLC
Big Lake, Alaska
Standard 2025-05-22 ValidFAA registration status code V: Valid registration. All codes
N738DM Cessna
172N
Fixed-wing, single engine Buiqui Aerospace CORP
Kissimmee, Florida
Standard 2025-05-22 Reports overdueFAA registration status code N: Non-citizen corporation that has not returned its flight-hour reports. All codes
N7656K Piper
PA-20
Fixed-wing, single engine Individual owner
Washington
Standard 2025-05-22 ValidFAA registration status code V: Valid registration. All codes
N98960 Cessna
172P
Fixed-wing, single engine Buiqui Aerospace CORP
Kissimmee, Florida
Standard 2025-05-22 ValidFAA registration status code V: Valid registration. All codes
N9912Q Cessna
172M
Fixed-wing, single engine Kd Aviation LLC
Sheridan, Wyoming
Standard 2025-05-22 ValidFAA registration status code V: Valid registration. All codes
N10FT Thompson Paul F
MARQUART CHARGER MA5
Fixed-wing, single engine Londonini Transport LLC
San Marcos, Texas
Experimental 2025-05-21 ValidFAA registration status code V: Valid registration. All codes
N2568Q Piper
PA-28-161
Fixed-wing, single engine Individual owner
Texas
Standard 2025-05-21 ValidFAA registration status code V: Valid registration. All codes
N2635P Piper
PA-22-150
Fixed-wing, single engine Individual owner
Washington
Standard 2025-05-21 ValidFAA registration status code V: Valid registration. All codes
N2ST Franklin Richard E (Rick)
FRANKLIN RV-6
Fixed-wing, single engine Individual owner
Illinois
Experimental 2025-05-21 ValidFAA registration status code V: Valid registration. All codes
N35322 Cessna
172I
Fixed-wing, single engine Individual owner
Utah
Standard 2025-05-21 ValidFAA registration status code V: Valid registration. All codes
N42502 Piper
PA-18-150
Fixed-wing, single engine Individual owner
Ohio
Standard 2025-05-21 ValidFAA registration status code V: Valid registration. All codes
N6068N Beech
19A
Fixed-wing, single engine Individual owner
Wisconsin
Standard 2025-05-21 ValidFAA registration status code V: Valid registration. All codes
N68B Grumman American Avn. Corp.
AA-5A
Fixed-wing, single engine Co-owned owner
Florida
Standard 2025-05-21 ValidFAA registration status code V: Valid registration. All codes
N7457R Piper
PA-28-140
Fixed-wing, single engine Individual owner
Texas
Standard 2025-05-21 ValidFAA registration status code V: Valid registration. All codes
N7914L Beech
A23-19
Fixed-wing, single engine Humble Aviation LLC
Russellville, Arkansas
Standard 2025-05-21 ValidFAA registration status code V: Valid registration. All codes
N83433 Piper
PA-18-150
Fixed-wing, single engine Withheld at owner's request
Restricted 2025-05-21 ValidFAA registration status code V: Valid registration. All codes
N8576Y Piper
PA-18-150
Fixed-wing, single engine Centerline Holdings LLC
Belgrade, Montana
Restricted 2025-05-21 ValidFAA registration status code V: Valid registration. All codes
N9085L Champion
7GCAA
Fixed-wing, single engine Co-owned owner
Kansas
Restricted 2025-05-21 ValidFAA registration status code V: Valid registration. All codes
N911LC Robinson Helicopter
R22 BETA
Helicopter Neel Aviation LLC
Lakeland, Florida
Standard 2025-05-21 ValidFAA registration status code V: Valid registration. All codes
N13951 Piper
PA-18-150
Fixed-wing, single engine Black Timber Aviation LLC
Rifle, Colorado
Standard 2025-05-20 ValidFAA registration status code V: Valid registration. All codes
N156E Del Dammann
VANS RV9A
Fixed-wing, single engine Individual owner
South Dakota
Experimental 2025-05-20 ValidFAA registration status code V: Valid registration. All codes
N33376 Piper
PA-28-151
Fixed-wing, single engine Individual owner
Illinois
Standard 2025-05-20 ValidFAA registration status code V: Valid registration. All codes
N4659Q Cessna
172M
Fixed-wing, single engine N4659Q CORP
Papillion, Nebraska
Standard 2025-05-20 ValidFAA registration status code V: Valid registration. All codes
N4661R Piper
PA-28-140
Fixed-wing, single engine Individual owner
Florida
Standard 2025-05-20 ValidFAA registration status code V: Valid registration. All codes
N5LG Piper
PA-28-140
Fixed-wing, single engine Co-owned owner
Florida
Standard 2025-05-20 ValidFAA registration status code V: Valid registration. All codes
N78542 Cessna
172K
Fixed-wing, single engine Individual owner
Alaska
Standard 2025-05-20 ValidFAA registration status code V: Valid registration. All codes
N8291N Piper
PA-28-140
Fixed-wing, single engine Co-owned owner
Wisconsin
Standard 2025-05-20 ValidFAA registration status code V: Valid registration. All codes
N9379H Cessna
172M
Fixed-wing, single engine Citizen Air LLC
Port Angeles, Washington
Standard 2025-05-20 ValidFAA registration status code V: Valid registration. All codes
N13504 Cessna
172M
Fixed-wing, single engine Individual owner
North Carolina
Standard 2025-05-19 ValidFAA registration status code V: Valid registration. All codes
N3177Z Piper
PA-22-150
Fixed-wing, single engine Individual owner
Florida
Standard 2025-05-19 ValidFAA registration status code V: Valid registration. All codes
N320Z Mark Schoening
ZENITH CH 750 CRUZER
Fixed-wing, single engine Individual owner
New York
Experimental 2025-05-19 ValidFAA registration status code V: Valid registration. All codes
N3244T Cessna
177
Fixed-wing, single engine Individual owner
North Carolina
Standard 2025-05-19 ValidFAA registration status code V: Valid registration. All codes
N36594 Bellanca
7GCBC
Fixed-wing, single engine Co-owned owner
Alaska
Standard 2025-05-19 ValidFAA registration status code V: Valid registration. All codes
N48BG Cessna
172N
Fixed-wing, single engine Individual owner
Texas
Standard 2025-05-19 ValidFAA registration status code V: Valid registration. All codes
N5027N Bellanca
7GCBC
Fixed-wing, single engine Individual owner
California
Standard 2025-05-19 ValidFAA registration status code V: Valid registration. All codes
N569WH Piper
PA-18-150
Fixed-wing, single engine Gp Cub Air LLC
Sioux Rapids, Iowa
Standard 2025-05-19 ValidFAA registration status code V: Valid registration. All codes
N63TX Soward Marvin E
VANS RV-6A
Fixed-wing, single engine Co-owned owner
Colorado
Experimental 2025-05-19 ValidFAA registration status code V: Valid registration. All codes
N78520 Cessna
172K
Fixed-wing, single engine Jdb Aviation INC
Merritt Island, Florida
Standard 2025-05-19 ValidFAA registration status code V: Valid registration. All codes
N7894G Cessna
172L
Fixed-wing, single engine Ar Aero Services LLC
Sacramento, California
Standard 2025-05-18 ValidFAA registration status code V: Valid registration. All codes
N40963 Piper
PA-28-151
Fixed-wing, single engine Individual owner
Texas
Standard 2025-05-17 ValidFAA registration status code V: Valid registration. All codes
N7520D Piper
PA-22-150
Fixed-wing, single engine Individual owner
Wisconsin
Standard 2025-05-17 ValidFAA registration status code V: Valid registration. All codes
N755DK Jorgen Skovbjerg
LONGEZ-JS
Fixed-wing, single engine Individual owner
California
Experimental 2025-05-17 ValidFAA registration status code V: Valid registration. All codes
N963RD Shimerda John H
RV-6A
Fixed-wing, single engine Individual owner
Texas
Experimental 2025-05-17 ValidFAA registration status code V: Valid registration. All codes
N13334 Cessna
172M
Fixed-wing, single engine Tlb INC
Howell, New Jersey
Standard 2025-05-16 ValidFAA registration status code V: Valid registration. All codes
N2785M Piper
PA-12
Fixed-wing, single engine Individual owner
Alaska
Standard 2025-05-16 ValidFAA registration status code V: Valid registration. All codes
N3837Q Cessna
172L
Fixed-wing, single engine Baja Guided Tripps LLC
Grand Lake Stream, Maine
Standard 2025-05-16 ValidFAA registration status code V: Valid registration. All codes
N4314J Piper
PA-28-140
Fixed-wing, single engine Co-owned owner
Indiana
Standard 2025-05-16 ValidFAA registration status code V: Valid registration. All codes
N4896M Cessna
172P
Fixed-wing, single engine Smtm Holdings INC
Wilmington, Delaware
Standard 2025-05-16 ValidFAA registration status code V: Valid registration. All codes
N57364 Piper
PA-28-151
Fixed-wing, single engine Fit Fliers LLC
Worcester, Massachusetts
Standard 2025-05-16 ValidFAA registration status code V: Valid registration. All codes
N293MA American Champion Aircraft
7GCBC
Fixed-wing, single engine Individual owner
Minnesota
Standard 2025-05-15 ValidFAA registration status code V: Valid registration. All codes
N4393R Cessna
172M
Fixed-wing, single engine Horizon Dreams LLC
Homer, Georgia
Standard 2025-05-15 ValidFAA registration status code V: Valid registration. All codes
N5506M Bellanca
7GCBC
Fixed-wing, single engine Cloud Kicker Aviation LLC
Kalamazoo, Michigan
Standard 2025-05-15 ValidFAA registration status code V: Valid registration. All codes
N611FL Piper
PA-28-140
Fixed-wing, single engine Individual owner
North Carolina
Standard 2025-05-15 ValidFAA registration status code V: Valid registration. All codes
N739XA Cessna
172N
Fixed-wing, single engine 7550G LLC
Birmingham, Michigan
Standard 2025-05-15 ValidFAA registration status code V: Valid registration. All codes
N95084 Piper
PA-28-140
Fixed-wing, single engine Individual owner
Kansas
Standard 2025-05-15 ValidFAA registration status code V: Valid registration. All codes
N98494 Cessna
172P
Fixed-wing, single engine Individual owner
Georgia
Standard 2025-05-15 ValidFAA registration status code V: Valid registration. All codes
N12562 Cessna
172M
Fixed-wing, single engine Individual owner
Wisconsin
Standard 2025-05-14 ValidFAA registration status code V: Valid registration. All codes
N13905 Cessna
172M
Fixed-wing, single engine Positive Rate LLC
Rutherford, New Jersey
Standard 2025-05-14 ValidFAA registration status code V: Valid registration. All codes
N15760 Piper
PA-28-140
Fixed-wing, single engine Been Flyin LLC
Colchester, Connecticut
Standard 2025-05-14 ValidFAA registration status code V: Valid registration. All codes
N277CP Piper
PA-28
Fixed-wing, single engine Gribbins Aviation LLC
Elk Horn, Kentucky
Standard 2025-05-14 ValidFAA registration status code V: Valid registration. All codes
N2826 Bost
PITTS SPECIAL S-1
Fixed-wing, single engine Individual owner
Wisconsin
Experimental 2025-05-14 ValidFAA registration status code V: Valid registration. All codes
N32332 Piper
PA-28-151
Fixed-wing, single engine Warrior 74 LLC
Columbia, South Carolina
Standard 2025-05-14 ValidFAA registration status code V: Valid registration. All codes
N3688K Piper
PA-28-140
Fixed-wing, single engine Flying Trout LLC
Port Orchard, Washington
Standard 2025-05-14 ValidFAA registration status code V: Valid registration. All codes
N3997K Piper
PA-28-140
Fixed-wing, single engine Fly Around Alaska LLC
Palmer, Alaska
Standard 2025-05-14 ValidFAA registration status code V: Valid registration. All codes
N4363A Piper
PA-22-150
Fixed-wing, single engine Individual owner
Alaska
Restricted 2025-05-14 ValidFAA registration status code V: Valid registration. All codes
N4436R Cessna
172M
Fixed-wing, single engine Co-owned owner
Washington
Standard 2025-05-14 ValidFAA registration status code V: Valid registration. All codes
N517RS Reynolds Bruce T
REYNOLDS RV6-A
Fixed-wing, single engine Individual owner
Texas
Experimental 2025-05-14 ValidFAA registration status code V: Valid registration. All codes
N527CG Luther Arthur B
RV-4
Fixed-wing, single engine Individual owner
Arizona
Experimental 2025-05-14 ValidFAA registration status code V: Valid registration. All codes
N55558 Piper
PA-28-140
Fixed-wing, single engine Individual owner
Washington
Standard 2025-05-14 ValidFAA registration status code V: Valid registration. All codes
N646DG Hulse David C
GLASTAR
Fixed-wing, single engine Individual owner
California
Experimental 2025-05-14 ValidFAA registration status code V: Valid registration. All codes
Previous Page 28 of 200 Next

Source: FAA Civil Aviation Registry, Releasable Aircraft Database (the engine reference table and each aircraft's engine code), October 7, 2026. Horsepower and thrust are the FAA's figures for the series, not for a particular aircraft.