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
N32265 Piper
PA-28-140
Fixed-wing, single engine Individual owner
Florida
Standard 2020-07-02 ValidFAA registration status code V: Valid registration. All codes
N526F Cessna
177
Fixed-wing, single engine Individual owner
Arkansas
Standard 2020-07-02 ValidFAA registration status code V: Valid registration. All codes
N55WA Daniels
THORP T-18
Fixed-wing, single engine Individual owner
Iowa
Experimental 2020-07-02 ValidFAA registration status code V: Valid registration. All codes
N9572V Cessna
172M
Fixed-wing, single engine Individual owner
Texas
Standard 2020-07-02 ValidFAA registration status code V: Valid registration. All codes
N98351 Piper
PA-28-140
Fixed-wing, single engine Individual owner
Arizona
Standard 2020-07-02 ValidFAA registration status code V: Valid registration. All codes
N200JH Herndon Jack
VANS RV 6A
Fixed-wing, single engine Individual owner
Arkansas
Experimental 2020-07-01 ValidFAA registration status code V: Valid registration. All codes
N307SP Cessna
172N
Fixed-wing, single engine Sheridan Pilots 307 LLC
Sheridan, Wyoming
Standard 2020-07-01 ValidFAA registration status code V: Valid registration. All codes
N4293Q Cessna
172L
Fixed-wing, single engine Kcsi Aerial Patrol INC
Bakersfield, California
Standard 2020-07-01 ValidFAA registration status code V: Valid registration. All codes
N6422W Piper
PA-28-140
Fixed-wing, single engine Individual owner
California
Standard 2020-07-01 ValidFAA registration status code V: Valid registration. All codes
N526WR Cessna
172N
Fixed-wing, single engine Florida and Caribbean Flight Training LLC
Punta Gorda, Florida
Standard 2020-06-30 ValidFAA registration status code V: Valid registration. All codes
N5282W Piper
PA-28-150
Fixed-wing, single engine Individual owner
Arizona
Standard 2020-06-30 ValidFAA registration status code V: Valid registration. All codes
N697FL Cessna
172P
Fixed-wing, single engine Aeroflyin CORP
Pembroke Pines, Florida
Standard 2020-06-30 ValidFAA registration status code V: Valid registration. All codes
N7258F Piper
PA-28-140
Fixed-wing, single engine Individual owner
Nevada
Standard 2020-06-30 ValidFAA registration status code V: Valid registration. All codes
N737VS Cessna
172N
Fixed-wing, single engine Walters Pujadas & Walker PC
Ocilla, Georgia
Standard 2020-06-30 ValidFAA registration status code V: Valid registration. All codes
N784CR Cessna
172K
Fixed-wing, single engine Individual owner
Texas
Standard 2020-06-30 ValidFAA registration status code V: Valid registration. All codes
N6316R Piper
PA-28-140
Fixed-wing, single engine Individual owner
Georgia
Standard 2020-06-29 ValidFAA registration status code V: Valid registration. All codes
N7252Q Cessna
172L
Fixed-wing, single engine Robbins Aviation LLC
Scottsbluff, Nebraska
Standard 2020-06-29 ValidFAA registration status code V: Valid registration. All codes
N733QH Cessna
172N
Fixed-wing, single engine Co-owned owner
Missouri
Standard 2020-06-29 ValidFAA registration status code V: Valid registration. All codes
N7LX Piper
PA-12
Fixed-wing, single engine Salish Flyers LLC
Medina, Washington
Standard 2020-06-26 ValidFAA registration status code V: Valid registration. All codes
N26082 Grumman American Avn. Corp.
AA-5A
Fixed-wing, single engine Individual owner
West Virginia
Standard 2020-06-25 ValidFAA registration status code V: Valid registration. All codes
N3904Q Cessna
172L
Fixed-wing, single engine Individual owner
Oklahoma
Standard 2020-06-25 ValidFAA registration status code V: Valid registration. All codes
N6199B Piper
PA-28-161
Fixed-wing, single engine D & S Aviation LLC
Spring, Texas
Standard 2020-06-25 ValidFAA registration status code V: Valid registration. All codes
N9124D Piper
PA-18A 150
Fixed-wing, single engine Co-owned owner
Alaska
Standard 2020-06-25 ValidFAA registration status code V: Valid registration. All codes
N4311P Piper
PA-23-160
Fixed-wing, multi-engine Individual owner
Virginia
Standard 2020-06-24 ValidFAA registration status code V: Valid registration. All codes
N6855B Piper
PA-22-150
Fixed-wing, single engine Co-owned owner
Alaska
Standard 2020-06-24 ValidFAA registration status code V: Valid registration. All codes
N77YM Piper
PA-18-150
Fixed-wing, single engine Co-owned owner
Washington
Standard 2020-06-24 ValidFAA registration status code V: Valid registration. All codes
N9869W Piper
PA-28-140
Fixed-wing, single engine Individual owner
Georgia
Standard 2020-06-24 ValidFAA registration status code V: Valid registration. All codes
N4NW Piper
PA-22-160
Fixed-wing, single engine Co-owned owner
Alaska
Standard 2020-06-23 ValidFAA registration status code V: Valid registration. All codes
N5252W Piper
PA-28
Fixed-wing, single engine Individual owner
Mississippi
Standard 2020-06-23 ValidFAA registration status code V: Valid registration. All codes
N73928 Cessna
172N
Fixed-wing, single engine Air Peanut LTD
Wilmington, Delaware
Standard 2020-06-23 ValidFAA registration status code V: Valid registration. All codes
N8705N Piper
PA-28-140
Fixed-wing, single engine Individual owner
Texas
Standard 2020-06-23 ValidFAA registration status code V: Valid registration. All codes
N9YV Piper
PA-18-150
Fixed-wing, single engine Individual owner
California
Restricted 2020-06-23 ValidFAA registration status code V: Valid registration. All codes
N1170M Cessna
172K
Fixed-wing, single engine Individual owner
Minnesota
Standard 2020-06-22 ValidFAA registration status code V: Valid registration. All codes
N2951M Piper
PA-12
Fixed-wing, single engine Stallone Anthony D
Anchorage, Alaska
Multiple 2020-06-22 ValidFAA registration status code V: Valid registration. All codes
N3558E Cessna
172N
Fixed-wing, single engine Visalia Flyers LLC
Visalia, California
Standard 2020-06-22 ValidFAA registration status code V: Valid registration. All codes
N4441Z Piper
PA-18-150
Fixed-wing, single engine Individual owner
Alaska
Standard 2020-06-22 ValidFAA registration status code V: Valid registration. All codes
N65WA Wagner Richard H
WAG CHUBBY CUBY
Fixed-wing, single engine Individual owner
Utah
Experimental 2020-06-22 ValidFAA registration status code V: Valid registration. All codes
N40836 Piper
PA-28-140
Fixed-wing, single engine Co-owned owner
Georgia
Standard 2020-06-19 ValidFAA registration status code V: Valid registration. All codes
N55HA Cessna
172N
Fixed-wing, single engine Honaker Group LLC
Sellersburg, Indiana
Standard 2020-06-19 ValidFAA registration status code V: Valid registration. All codes
N95459 Piper
PA-28-140
Fixed-wing, single engine Individual owner
Florida
Standard 2020-06-19 ValidFAA registration status code V: Valid registration. All codes
N172CL Cessna
172N
Fixed-wing, single engine Individual owner
Wisconsin
Standard 2020-06-18 ValidFAA registration status code V: Valid registration. All codes
N3697Z Piper
PA-18-150
Fixed-wing, single engine Northern Wilderness Aviation LLC
Tok, Alaska
Multiple 2020-06-18 ValidFAA registration status code V: Valid registration. All codes
N4229Z Piper
PA-18-150
Fixed-wing, single engine Individual owner
Washington
Standard 2020-06-18 ValidFAA registration status code V: Valid registration. All codes
N61465 Piper
PA-12
Fixed-wing, single engine Individual owner
Tennessee
Standard 2020-06-18 ValidFAA registration status code V: Valid registration. All codes
N7824D Piper
PA-22-150
Fixed-wing, single engine Individual owner
Georgia
Standard 2020-06-18 ValidFAA registration status code V: Valid registration. All codes
N9717Q Cessna
172M
Fixed-wing, single engine Co-owned owner
Texas
Standard 2020-06-18 ValidFAA registration status code V: Valid registration. All codes
N9884P Piper
PA-18-150
Fixed-wing, single engine Individual owner
Alaska
Standard 2020-06-18 ValidFAA registration status code V: Valid registration. All codes
N19747 Cessna
172L
Fixed-wing, single engine Individual owner
Washington
Standard 2020-06-17 ValidFAA registration status code V: Valid registration. All codes
N2505F Champion
7ECA
Fixed-wing, single engine Acme Anvil LLC
Parker, Colorado
Standard 2020-06-17 ValidFAA registration status code V: Valid registration. All codes
N20368 Cessna
172M
Fixed-wing, single engine Beaver Flying Club INC
Xenia, Ohio
Standard 2020-06-16 ValidFAA registration status code V: Valid registration. All codes
N3609E Cessna
172N
Fixed-wing, single engine Bismarck Aero Center CORP
Bismarck, North Dakota
Standard 2020-06-16 ValidFAA registration status code V: Valid registration. All codes
N3793Z Piper
PA-18-150
Fixed-wing, single engine Individual owner
Minnesota
Standard 2020-06-16 ValidFAA registration status code V: Valid registration. All codes
N63702 Cessna
172P
Fixed-wing, single engine Co-owned owner
Washington
Standard 2020-06-16 ValidFAA registration status code V: Valid registration. All codes
N833WT Piper
PA-28-140
Fixed-wing, single engine N833Wt LLC
Lake City, Florida
Standard 2020-06-16 ValidFAA registration status code V: Valid registration. All codes
N99295 Cessna
172P
Fixed-wing, single engine Sky Warrior Flight Training INC
Pensacola, Florida
Standard 2020-06-16 ValidFAA registration status code V: Valid registration. All codes
N4461V Rich Beryl G
RV3-A
Fixed-wing, single engine Individual owner
Utah
Experimental 2020-06-15 ValidFAA registration status code V: Valid registration. All codes
N54448 Cessna
172P
Fixed-wing, single engine Jupiter Flight Service and Investing LLC
Lithonia, Georgia
Standard 2020-06-15 ValidFAA registration status code V: Valid registration. All codes
N5898L American
AA-5
Fixed-wing, single engine Individual owner
Michigan
Standard 2020-06-15 ValidFAA registration status code V: Valid registration. All codes
N64DT Piper
PA-18-150
Fixed-wing, single engine Co-owned owner
Alaska
Standard 2020-06-15 ValidFAA registration status code V: Valid registration. All codes
N7187Q Cessna
172L
Fixed-wing, single engine Chestnut Ridge Flying Club
Latrobe, Pennsylvania
Standard 2020-06-15 ValidFAA registration status code V: Valid registration. All codes
N739RL Cessna
172N
Fixed-wing, single engine Jupiter Flight Service and Investing LLC
Lithonia, Georgia
Standard 2020-06-15 ValidFAA registration status code V: Valid registration. All codes
N8267N Piper
PA-28-140
Fixed-wing, single engine Individual owner
Texas
Standard 2020-06-15 ValidFAA registration status code V: Valid registration. All codes
N3983Z Piper
PA-18-150
Fixed-wing, single engine Co-owned owner
Alaska
Standard 2020-06-12 ValidFAA registration status code V: Valid registration. All codes
N184WL Piper
PA-18-150
Fixed-wing, single engine Individual owner
Nevada
Standard 2020-06-11 ValidFAA registration status code V: Valid registration. All codes
N22598 Cessna
172M
Fixed-wing, single engine Individual owner
Texas
Standard 2020-06-11 ValidFAA registration status code V: Valid registration. All codes
N2657M Piper
PA-12
Fixed-wing, single engine Individual owner
Alaska
Standard 2020-06-11 ValidFAA registration status code V: Valid registration. All codes
N720MG Fitzgerald Stephen
FITZGERALD/VANS RV-3
Fixed-wing, single engine Withheld at owner's request
Experimental 2020-06-11 ValidFAA registration status code V: Valid registration. All codes
N78482 Cessna
172K
Fixed-wing, single engine N78482 LLC
Granbury, Texas
Standard 2020-06-11 ValidFAA registration status code V: Valid registration. All codes
N98161 Piper
PA-28-140
Fixed-wing, single engine Individual owner
California
Standard 2020-06-11 ValidFAA registration status code V: Valid registration. All codes
N123JC Piper
PA-28-140
Fixed-wing, single engine Individual owner
Arkansas
Standard 2020-06-10 ValidFAA registration status code V: Valid registration. All codes
N1718P Piper
PA-22
Fixed-wing, single engine Individual owner
Oregon
Standard 2020-06-10 ValidFAA registration status code V: Valid registration. All codes
N3353P Piper
PA-23-160
Fixed-wing, multi-engine Individual owner
Minnesota
Standard 2020-06-10 ValidFAA registration status code V: Valid registration. All codes
N3951Q Cessna
172L
Fixed-wing, single engine Individual owner
California
Standard 2020-06-10 ValidFAA registration status code V: Valid registration. All codes
N4501R Piper
PA-28-140
Fixed-wing, single engine Ness James H
Phoenix, Arizona
Standard 2020-06-10 ValidFAA registration status code V: Valid registration. All codes
N5987U Piper
PA-28-140
Fixed-wing, single engine Individual owner
Minnesota
Standard 2020-06-10 ValidFAA registration status code V: Valid registration. All codes
N6397R Piper
PA-28-140
Fixed-wing, single engine Goodman Creighton A
Riverside, California
Standard 2020-06-10 ValidFAA registration status code V: Valid registration. All codes
N6533W Piper
PA-28-140
Fixed-wing, single engine 21 Luna LLC
Phoenix, Arizona
Standard 2020-06-10 ValidFAA registration status code V: Valid registration. All codes
N691DL Weston David F
VANS AIRCRAFT RV-6
Fixed-wing, single engine Individual owner
Idaho
Experimental 2020-06-10 ValidFAA registration status code V: Valid registration. All codes
N7180L Grumman American Avn. Corp.
AA-5
Fixed-wing, single engine Individual owner
Minnesota
Standard 2020-06-10 ValidFAA registration status code V: Valid registration. All codes
N7837H Piper
PA-12
Fixed-wing, single engine Individual owner
Washington
Multiple 2020-06-10 ValidFAA registration status code V: Valid registration. All codes
N8786 Phelps
THORP T-18
Fixed-wing, single engine Kiloecho Trnsport LLC
Tucson, Arizona
Experimental 2020-06-10 ValidFAA registration status code V: Valid registration. All codes
N510PC Socata
TB 9 TAMPICO
Fixed-wing, single engine Individual owner
Florida
Standard 2020-06-09 ValidFAA registration status code V: Valid registration. All codes
N13693 Cessna
172M
Fixed-wing, single engine Iowa Lakes Community College
Estherville, Iowa
Standard 2020-06-08 ValidFAA registration status code V: Valid registration. All codes
N63918 Cessna
172P
Fixed-wing, single engine Sky Warrior Flight Training INC
Pensacola, Florida
Standard 2020-06-08 ValidFAA registration status code V: Valid registration. All codes
N4155T Piper
PA-18-150
Fixed-wing, single engine Individual owner
Colorado
Standard 2020-06-05 ValidFAA registration status code V: Valid registration. All codes
N86738 Bellanca
7GCBC
Fixed-wing, single engine Individual owner
North Dakota
Standard 2020-06-05 ValidFAA registration status code V: Valid registration. All codes
N262ER Cessna
172M
Fixed-wing, single engine Roseville Aviation LLC
Roxboro, North Carolina
Standard 2020-06-04 ValidFAA registration status code V: Valid registration. All codes
N32336 Piper
PA-28-140
Fixed-wing, single engine Individual owner
Illinois
Standard 2020-06-04 ValidFAA registration status code V: Valid registration. All codes
N3822Q Cessna
172L
Fixed-wing, single engine Individual owner
Guam
Standard 2020-06-04 ValidFAA registration status code V: Valid registration. All codes
N3893Q Cessna
172L
Fixed-wing, single engine Individual owner
Mississippi
Standard 2020-06-04 ValidFAA registration status code V: Valid registration. All codes
N4147Y Bellanca
7GCBC
Fixed-wing, single engine Individual owner
Minnesota
Standard 2020-06-04 ValidFAA registration status code V: Valid registration. All codes
N47634 Piper
PA-28-161
Fixed-wing, single engine Co-owned owner
Illinois
Standard 2020-06-04 ValidFAA registration status code V: Valid registration. All codes
N57378 Piper
PA-28-140
Fixed-wing, single engine Co-owned owner
California
Standard 2020-06-04 ValidFAA registration status code V: Valid registration. All codes
N6353W Piper
PA-28-140
Fixed-wing, single engine Individual owner
Texas
Standard 2020-06-04 ValidFAA registration status code V: Valid registration. All codes
N82563 Piper
PA-18-150
Fixed-wing, single engine Withheld at owner's request
Standard 2020-06-04 ValidFAA registration status code V: Valid registration. All codes
N84358 Cessna
172K
Fixed-wing, single engine Individual owner
Texas
Standard 2020-06-04 ValidFAA registration status code V: Valid registration. All codes
N926DG Gorton David R
GORTON RV6
Fixed-wing, single engine Individual owner
Texas
Experimental 2020-06-04 ValidFAA registration status code V: Valid registration. All codes
N98502 Cessna
172P
Fixed-wing, single engine Sky Warrior Flight Training INC
Pensacola, Florida
Standard 2020-06-04 ValidFAA registration status code V: Valid registration. All codes
N6604F Piper
PA-28-151
Fixed-wing, single engine Evolution Air LLC
Huntley, Illinois
Standard 2020-06-03 ValidFAA registration status code V: Valid registration. All codes
N7069G Cessna
172K
Fixed-wing, single engine Ajf Enterprises LLC
Des Moines, Iowa
Standard 2020-06-03 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.