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
N8061D Piper
PA-22-150
Fixed-wing, single engine Co-owned owner
Alaska
Restricted 2022-09-14 ValidFAA registration status code V: Valid registration. All codes
N101RV Berthe C J Jr
VANS RV-3B
Fixed-wing, single engine Individual owner
Georgia
Experimental 2022-09-13 ValidFAA registration status code V: Valid registration. All codes
N6596D Cessna
172N
Fixed-wing, single engine Individual owner
Alaska
Standard 2022-09-13 ValidFAA registration status code V: Valid registration. All codes
N737AY Cessna
172N
Fixed-wing, single engine Individual owner
Iowa
Multiple 2022-09-13 ValidFAA registration status code V: Valid registration. All codes
N223DB Bellis Dennis G
RV-6
Fixed-wing, single engine Good Winds Aero LLC
Roseburg, Oregon
Experimental 2022-09-12 ValidFAA registration status code V: Valid registration. All codes
N6121H Piper
PA-28-161
Fixed-wing, single engine Rethink Creative Group LLC
Fort Worth, Texas
Standard 2022-09-12 ValidFAA registration status code V: Valid registration. All codes
N32165 Piper
PA-28-151
Fixed-wing, single engine Individual owner
Tennessee
Standard 2022-09-10 ValidFAA registration status code V: Valid registration. All codes
N5090E Cessna
172N
Fixed-wing, single engine Melbourne Flight Training LLC
Melbourne, Florida
Standard 2022-09-10 ValidFAA registration status code V: Valid registration. All codes
N5158X Champion
7GCBC
Fixed-wing, single engine Individual owner
Nebraska
Standard 2022-09-10 ValidFAA registration status code V: Valid registration. All codes
N6472W Piper
PA-28-140
Fixed-wing, single engine Individual owner
Kentucky
Standard 2022-09-10 ValidFAA registration status code V: Valid registration. All codes
N6847B Piper
PA-22-150
Fixed-wing, single engine Ott Grosvenor LLC
Dillingham, Alaska
Standard 2022-09-10 ValidFAA registration status code V: Valid registration. All codes
N6943B Piper
PA-22-150
Fixed-wing, single engine Individual owner
Oregon
Standard 2022-09-10 ValidFAA registration status code V: Valid registration. All codes
N739GQ Cessna
172N
Fixed-wing, single engine Melbourne Flight Training LLC
Melbourne, Florida
Standard 2022-09-10 ValidFAA registration status code V: Valid registration. All codes
N73V Piper
PA-23-160
Fixed-wing, multi-engine Individual owner
Florida
Standard 2022-09-10 ValidFAA registration status code V: Valid registration. All codes
N937MA Piper
PA-28-151
Fixed-wing, single engine Macair Aviation LLC
Xenia, Ohio
Standard 2022-09-10 ValidFAA registration status code V: Valid registration. All codes
N12541 Cessna
172M
Fixed-wing, single engine High Flight Academy LLC
Allison Park, Pennsylvania
Standard 2022-09-09 ValidFAA registration status code V: Valid registration. All codes
N38BS Piper
PA-18-150
Fixed-wing, single engine Jack Browns Seaplane Base INC
Winter Haven, Florida
Standard 2022-09-09 ValidFAA registration status code V: Valid registration. All codes
N55364 Piper
PA-28-140
Fixed-wing, single engine Individual owner
Connecticut
Standard 2022-09-09 ValidFAA registration status code V: Valid registration. All codes
N5857L American
AA-5
Fixed-wing, single engine Individual owner
Florida
Standard 2022-09-09 ValidFAA registration status code V: Valid registration. All codes
N6672H Cessna
172M
Fixed-wing, single engine Individual owner
Texas
Standard 2022-09-09 ValidFAA registration status code V: Valid registration. All codes
N67WA Piper
PA-28-140
Fixed-wing, single engine Capital District Pilots LLC
Slingerlands, New York
Standard 2022-09-09 ValidFAA registration status code V: Valid registration. All codes
N75230 Piper
PA-28-151
Fixed-wing, single engine Aircraft Sales INC
Canton, Ohio
Standard 2022-09-09 ValidFAA registration status code V: Valid registration. All codes
N75829 Cessna
172N
Fixed-wing, single engine Hofmann LLC
Blauvelt, New York
Standard 2022-09-09 ValidFAA registration status code V: Valid registration. All codes
N99TN Cessna
172M
Fixed-wing, single engine Individual owner
Oklahoma
Standard 2022-09-09 ValidFAA registration status code V: Valid registration. All codes
N13685 Cessna
172M
Fixed-wing, single engine Lee Valley INC
Tekamah, Nebraska
Standard 2022-09-08 ValidFAA registration status code V: Valid registration. All codes
N3848Z Piper
PA-18-150
Fixed-wing, single engine Individual owner
Alaska
Multiple 2022-09-08 ValidFAA registration status code V: Valid registration. All codes
N3892K Piper
PA-28-140
Fixed-wing, single engine Co-owned owner
Utah
Standard 2022-09-08 ValidFAA registration status code V: Valid registration. All codes
N399JT Piper
PA-28-140
Fixed-wing, single engine Individual owner
Washington
Standard 2022-09-08 ValidFAA registration status code V: Valid registration. All codes
N4417J Piper
PA-28-140
Fixed-wing, single engine Co-owned owner
Arizona
Standard 2022-09-08 ValidFAA registration status code V: Valid registration. All codes
N4757D Cessna
172N
Fixed-wing, single engine Individual owner
Florida
Multiple 2022-09-08 ValidFAA registration status code V: Valid registration. All codes
N5780F Piper
PA-28-140
Fixed-wing, single engine Aces Aviation LLC
Laurel, Montana
Standard 2022-09-08 ValidFAA registration status code V: Valid registration. All codes
N5799U Piper
PA-28-140
Fixed-wing, single engine Individual owner
Pennsylvania
Standard 2022-09-08 ValidFAA registration status code V: Valid registration. All codes
N6041L American
AA-5
Fixed-wing, single engine Airspeed Marketing LLC
Phoenix, Arizona
Standard 2022-09-08 ValidFAA registration status code V: Valid registration. All codes
N917FA Cessna
172P
Fixed-wing, single engine Alpha Aircraft International LLC
Lake Worth, Florida
Standard 2022-09-08 ValidFAA registration status code V: Valid registration. All codes
N20AA Cessna
172I
Fixed-wing, single engine Grand River Aviation LLC
Kremmling, Colorado
Standard 2022-09-07 ValidFAA registration status code V: Valid registration. All codes
N3625K Piper
PA-28-140
Fixed-wing, single engine Acl Airplane Holding LLC
Covington, Tennessee
Standard 2022-09-07 ValidFAA registration status code V: Valid registration. All codes
N46132 Cessna
172I
Fixed-wing, single engine N46132 Leasing LLC
Kalispell, Montana
Standard 2022-09-07 ValidFAA registration status code V: Valid registration. All codes
N592FL Piper
PA-28-140
Fixed-wing, single engine Grey Rose Air LLC
Edenton, North Carolina
Standard 2022-09-07 ValidFAA registration status code V: Valid registration. All codes
N7008A Cessna
172
Fixed-wing, single engine Mitchell Shawn J
Red Bluff, California
Standard 2022-09-07 ValidFAA registration status code V: Valid registration. All codes
N733PV Cessna
172N
Fixed-wing, single engine California Airways LLC
Hayward, California
Standard 2022-09-07 ValidFAA registration status code V: Valid registration. All codes
N737WS Cessna
172N
Fixed-wing, single engine Boeing Employees Flying Association
Renton, Washington
Standard 2022-09-07 ValidFAA registration status code V: Valid registration. All codes
N9779W Piper
PA-28-140
Fixed-wing, single engine November Sierra Aviation LLC
Oneill, Nebraska
Standard 2022-09-07 ValidFAA registration status code V: Valid registration. All codes
N111SA Cessna
172M
Fixed-wing, single engine 111Sa LLC
Greeley, Colorado
Standard 2022-09-06 ValidFAA registration status code V: Valid registration. All codes
N41177 Piper
PA-28-151
Fixed-wing, single engine Individual owner
California
Standard 2022-09-06 ValidFAA registration status code V: Valid registration. All codes
N4811A Piper
PA-22-150
Fixed-wing, single engine Individual owner
Montana
Standard 2022-09-06 ValidFAA registration status code V: Valid registration. All codes
N6122W Piper
PA-28-140
Fixed-wing, single engine N6122W LLC
Tillamook, Oregon
Standard 2022-09-06 ValidFAA registration status code V: Valid registration. All codes
N64220 Cessna
172M
Fixed-wing, single engine Individual owner
Texas
Standard 2022-09-06 ValidFAA registration status code V: Valid registration. All codes
N7574R Piper
PA-28-140
Fixed-wing, single engine Individual owner
Ohio
Standard 2022-09-06 ValidFAA registration status code V: Valid registration. All codes
N79967 Cessna
172K
Fixed-wing, single engine Komorek Kristen
Selinsgrove, Pennsylvania
Standard 2022-09-06 ValidFAA registration status code V: Valid registration. All codes
N8144C Piper
PA-22-150
Fixed-wing, single engine Individual owner
Texas
Standard 2022-09-06 ValidFAA registration status code V: Valid registration. All codes
N9697D Piper
PA-22-160
Fixed-wing, single engine Individual owner
New York
Standard 2022-09-06 ValidFAA registration status code V: Valid registration. All codes
N13378 Cessna
172M
Fixed-wing, single engine Co-owned owner
North Carolina
Standard 2022-09-03 ValidFAA registration status code V: Valid registration. All codes
N20268 Cessna
172M
Fixed-wing, single engine Fox Two LLC
Camino, California
Standard 2022-09-03 ValidFAA registration status code V: Valid registration. All codes
N252EC Piper
PA-28-140
Fixed-wing, single engine Clear Sky AG Services LLC
Arapahoe, Colorado
Standard 2022-09-03 ValidFAA registration status code V: Valid registration. All codes
N357P Piper
PA-28-161
Fixed-wing, single engine Paphos Airways LLC
Farmingdale, New York
Standard 2022-09-03 ValidFAA registration status code V: Valid registration. All codes
N3676Z Piper
PA-18
Fixed-wing, single engine Whisair LLC
Little Rock, Arkansas
Multiple 2022-09-03 ValidFAA registration status code V: Valid registration. All codes
N54576 Cessna
172P
Fixed-wing, single engine Rick Aviation INC
Newport News, Virginia
Restricted 2022-09-03 ValidFAA registration status code V: Valid registration. All codes
N567RV Orndorff George E Iii
RV-6A
Fixed-wing, single engine Individual owner
Colorado
Experimental 2022-09-03 ValidFAA registration status code V: Valid registration. All codes
N73519 Cessna
172M
Fixed-wing, single engine Usaeroflight LLC
Greenville, South Carolina
Standard 2022-09-03 ValidFAA registration status code V: Valid registration. All codes
N739ZS Cessna
172N
Fixed-wing, single engine Individual owner
North Dakota
Standard 2022-09-03 ValidFAA registration status code V: Valid registration. All codes
N76172 Cessna
172M
Fixed-wing, single engine Rjd Flight LLC
North Canton, Ohio
Standard 2022-09-03 ValidFAA registration status code V: Valid registration. All codes
N9337H Cessna
172M
Fixed-wing, single engine Lorraine'S Blue Sky Aviation LLC
Norman, Oklahoma
Standard 2022-09-03 ValidFAA registration status code V: Valid registration. All codes
N3447T Cessna
177
Fixed-wing, single engine Individual owner
Maryland
Standard 2022-09-02 ValidFAA registration status code V: Valid registration. All codes
N4298Q Cessna
172L
Fixed-wing, single engine Individual owner
Texas
Standard 2022-09-02 ValidFAA registration status code V: Valid registration. All codes
N7329F Piper
PA-28-140
Fixed-wing, single engine Proflite Aero LLC
Easton, Pennsylvania
Standard 2022-09-02 ValidFAA registration status code V: Valid registration. All codes
N12728 Cessna
172M
Fixed-wing, single engine Individual owner
Pennsylvania
Standard 2022-09-01 ValidFAA registration status code V: Valid registration. All codes
N1328R Grumman American Avn. Corp.
AA-5
Fixed-wing, single engine Individual owner
Georgia
Standard 2022-09-01 ValidFAA registration status code V: Valid registration. All codes
N223JP Perritt John O Jr M.D.
GLASTAR
Fixed-wing, single engine Co-owned owner
Oregon
Experimental 2022-09-01 ValidFAA registration status code V: Valid registration. All codes
N4379J Piper
PA-28-140
Fixed-wing, single engine Individual owner
Virginia
Standard 2022-09-01 ValidFAA registration status code V: Valid registration. All codes
N46303 Cessna
172K
Fixed-wing, single engine Harbour Aviation LLC
Weatherford, Texas
Standard 2022-09-01 ValidFAA registration status code V: Valid registration. All codes
N62281 Cessna
172P
Fixed-wing, single engine Christiansen Aviation LLC
Wilmington, Delaware
Standard 2022-09-01 ValidFAA registration status code V: Valid registration. All codes
N62475 Cessna
172P
Fixed-wing, single engine Christiansen Aviation LLC
Wilmington, Delaware
Standard 2022-09-01 ValidFAA registration status code V: Valid registration. All codes
N62946 Cessna
172P
Fixed-wing, single engine Christiansen Aviation LLC
Wilmington, Delaware
Standard 2022-09-01 ValidFAA registration status code V: Valid registration. All codes
N2466H Piper
PA-18-150
Fixed-wing, single engine Raven Girl LLC
Eagle River, Alaska
Standard 2022-08-31 ValidFAA registration status code V: Valid registration. All codes
N271MM Melanson Marvin
SUPER BEAR
Fixed-wing, single engine Individual owner
Minnesota
Experimental 2022-08-31 ValidFAA registration status code V: Valid registration. All codes
N35671 Piper
PA-28-161
Fixed-wing, single engine Individual owner
Kansas
Standard 2022-08-31 ValidFAA registration status code V: Valid registration. All codes
N4639Y Piper
PA-18-150
Fixed-wing, single engine Withheld at owner's request
Standard 2022-08-31 ValidFAA registration status code V: Valid registration. All codes
N5293K Cessna
172P
Fixed-wing, single engine Co-owned owner
Illinois
Standard 2022-08-31 ValidFAA registration status code V: Valid registration. All codes
N53800 Bellanca
7GCAA
Fixed-wing, single engine Blue Earth Flying Service LLC
Blue Earth, Minnesota
Standard 2022-08-31 ValidFAA registration status code V: Valid registration. All codes
N5525F Piper
PA-28-140
Fixed-wing, single engine Individual owner
New York
Standard 2022-08-31 ValidFAA registration status code V: Valid registration. All codes
N64535 Cessna
172M
Fixed-wing, single engine Panair Flying Club INC
Miami, Florida
Standard 2022-08-31 ValidFAA registration status code V: Valid registration. All codes
N738SJ Cessna
172N
Fixed-wing, single engine Birmingham Flight Center LLC
Birmingham, Alabama
Standard 2022-08-31 ValidFAA registration status code V: Valid registration. All codes
N9507D Piper
PA-22-160
Fixed-wing, single engine Individual owner
Oregon
Standard 2022-08-31 ValidFAA registration status code V: Valid registration. All codes
N3679P Piper
PA-18A
Fixed-wing, single engine Individual owner
Idaho
Standard 2022-08-30 ValidFAA registration status code V: Valid registration. All codes
N3781X Aero Commander
100
Fixed-wing, single engine N3781X LLC
Puyallup, Washington
Standard 2022-08-30 ValidFAA registration status code V: Valid registration. All codes
N4579R Piper
PA-28-140
Fixed-wing, single engine Individual owner
Montana
Standard 2022-08-30 ValidFAA registration status code V: Valid registration. All codes
N5920W Piper
PA-28-160
Fixed-wing, single engine Synergy Aviation LLC
Greer, South Carolina
Standard 2022-08-30 ValidFAA registration status code V: Valid registration. All codes
N7143R Piper
PA-28-140
Fixed-wing, single engine Individual owner
Wisconsin
Standard 2022-08-30 ValidFAA registration status code V: Valid registration. All codes
N737ZD Cessna
172N
Fixed-wing, single engine Hp Air INC
Cape Coral, Florida
Standard 2022-08-30 ValidFAA registration status code V: Valid registration. All codes
N739XS Cessna
172N
Fixed-wing, single engine Gorman Patrick M
Deerfield, Ohio
Standard 2022-08-30 ValidFAA registration status code V: Valid registration. All codes
N80119 Cessna
172M
Fixed-wing, single engine Individual owner
Oregon
Standard 2022-08-30 ValidFAA registration status code V: Valid registration. All codes
N1734T Piper
PA-28-140
Fixed-wing, single engine Individual owner
North Carolina
Standard 2022-08-29 ValidFAA registration status code V: Valid registration. All codes
N22954 Copenhaver Melvin G
RV-4
Fixed-wing, single engine Individual owner
California
Experimental 2022-08-29 ValidFAA registration status code V: Valid registration. All codes
N271SG Piper
PA-28-161
Fixed-wing, single engine Coco Aircraft INC
Merritt Island, Florida
Standard 2022-08-29 ValidFAA registration status code V: Valid registration. All codes
N3909K Piper
PA-28-140
Fixed-wing, single engine Individual owner
Maryland
Standard 2022-08-29 ValidFAA registration status code V: Valid registration. All codes
N417CZ Kidd Ronald L
COZY
Fixed-wing, single engine Co-owned owner
Texas
Experimental 2022-08-29 ValidFAA registration status code V: Valid registration. All codes
N52750 Cessna
172P
Fixed-wing, single engine Co-owned owner
Texas
Standard 2022-08-29 ValidFAA registration status code V: Valid registration. All codes
N738ZD Cessna
172N
Fixed-wing, single engine Christiansen Aviation LLC
Wilmington, Delaware
Standard 2022-08-29 ValidFAA registration status code V: Valid registration. All codes
N8091E Cessna
172P
Fixed-wing, single engine Christiansen Aviation LLC
Wilmington, Delaware
Standard 2022-08-29 ValidFAA registration status code V: Valid registration. All codes
N8274E Cessna
172N
Fixed-wing, single engine Christiansen Aviation LLC
Wilmington, Delaware
Standard 2022-08-29 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.