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
N7847H Piper
PA-12
Fixed-wing, single engine Eastern Iowa Gliders INC
Muscatine, Iowa
Standard 2023-05-23 ValidFAA registration status code V: Valid registration. All codes
N80326 Cessna
172M
Fixed-wing, single engine Fly Lugu LLC
Southwick, Massachusetts
Standard 2023-05-23 ValidFAA registration status code V: Valid registration. All codes
N80734 Cessna
172M
Fixed-wing, single engine Individual owner
Texas
Standard 2023-05-23 ValidFAA registration status code V: Valid registration. All codes
N8204W Piper
PA-28-180
Fixed-wing, single engine Co-owned owner
Washington
Standard 2023-05-23 ValidFAA registration status code V: Valid registration. All codes
N8621D Piper
PA-22-150
Fixed-wing, single engine Co-owned owner
Missouri
Standard 2023-05-23 ValidFAA registration status code V: Valid registration. All codes
N8859D Piper
PA-22-160
Fixed-wing, single engine Bbc Group LLC
Sanford, North Carolina
Standard 2023-05-23 ValidFAA registration status code V: Valid registration. All codes
N97NN Piper
PA-23
Fixed-wing, multi-engine Aviation Business CORP
Saint Louis, Missouri
Standard 2023-05-23 ValidFAA registration status code V: Valid registration. All codes
N2056 Kerr John Lee
THORP T-18
Fixed-wing, single engine Individual owner
Vermont
Experimental 2023-05-22 ValidFAA registration status code V: Valid registration. All codes
N222NA Piper
PA-28-151
Fixed-wing, single engine Individual owner
Texas
Standard 2023-05-22 ValidFAA registration status code V: Valid registration. All codes
N5126W Piper
PA-28
Fixed-wing, single engine Individual owner
Washington
Standard 2023-05-22 ValidFAA registration status code V: Valid registration. All codes
N57360 Piper
PA-28-140
Fixed-wing, single engine Individual owner
California
Standard 2023-05-22 ValidFAA registration status code V: Valid registration. All codes
N5963W Piper
PA-28-140
Fixed-wing, single engine Palm-Air Aviators LLC
Springville, Utah
Standard 2023-05-22 ValidFAA registration status code V: Valid registration. All codes
N7286Q Cessna
172L
Fixed-wing, single engine Individual owner
Texas
Standard 2023-05-22 ValidFAA registration status code V: Valid registration. All codes
N73563 Cessna
172M
Fixed-wing, single engine Hamms Lake Development INC
Crown Point, Indiana
Standard 2023-05-22 ValidFAA registration status code V: Valid registration. All codes
N83EW Cessna
172M
Fixed-wing, single engine Individual owner
Alaska
Standard 2023-05-22 ValidFAA registration status code V: Valid registration. All codes
N83PY Piper
PA-18A 150
Fixed-wing, single engine Individual owner
Alaska
Standard 2023-05-22 ValidFAA registration status code V: Valid registration. All codes
N867AA Cessna
172M
Fixed-wing, single engine Wings Over Texas Holdings LLC
Denton, Texas
Standard 2023-05-22 ValidFAA registration status code V: Valid registration. All codes
N1495U Cessna
172M
Fixed-wing, single engine Fairflight LLC
San Diego, California
Standard 2023-05-21 ValidFAA registration status code V: Valid registration. All codes
N6021W Piper
PA-28-140
Fixed-wing, single engine A&C Aviation LLC
Lawrenceville, Georgia
Standard 2023-05-21 ValidFAA registration status code V: Valid registration. All codes
N247SD Dwyer Stephen T
RV-9A
Fixed-wing, single engine Individual owner
Maryland
Experimental 2023-05-20 ValidFAA registration status code V: Valid registration. All codes
N3072D Piper
PA-28-161
Fixed-wing, single engine Fly By Knight INC
Hammond, Louisiana
Standard 2023-05-20 ValidFAA registration status code V: Valid registration. All codes
N4222J Piper
PA-28-140
Fixed-wing, single engine Individual owner
California
Standard 2023-05-20 ValidFAA registration status code V: Valid registration. All codes
N46133 Cessna
172I
Fixed-wing, single engine Individual owner
Louisiana
Standard 2023-05-20 ValidFAA registration status code V: Valid registration. All codes
N51379 Cessna
172M
Fixed-wing, single engine N51379 LLC
Galena, Ohio
Standard 2023-05-20 ValidFAA registration status code V: Valid registration. All codes
N610AM Cessna
172N
Fixed-wing, single engine Swaz Aviation LLC
Mesa, Arizona
Standard 2023-05-20 ValidFAA registration status code V: Valid registration. All codes
N7242G Cessna
172K
Fixed-wing, single engine Individual owner
Florida
Standard 2023-05-20 ValidFAA registration status code V: Valid registration. All codes
N7267J Piper
PA-28-140
Fixed-wing, single engine SE Aviation LLC
Boise, Idaho
Standard 2023-05-19 ValidFAA registration status code V: Valid registration. All codes
N734YA Cessna
172N
Fixed-wing, single engine Luxair LLC
College Station, Texas
Standard 2023-05-19 ValidFAA registration status code V: Valid registration. All codes
N737EH Cessna
172N
Fixed-wing, single engine Individual owner
Texas
Standard 2023-05-19 ValidFAA registration status code V: Valid registration. All codes
N738UE Cessna
172N
Fixed-wing, single engine Individual owner
Minnesota
Standard 2023-05-19 ValidFAA registration status code V: Valid registration. All codes
N79558 Cessna
172K
Fixed-wing, single engine Silver Creek Aviation Services LLC
Snowflake, Arizona
Standard 2023-05-19 ValidFAA registration status code V: Valid registration. All codes
N1681P Piper
PA-22
Fixed-wing, single engine Individual owner
California
Standard 2023-05-18 ValidFAA registration status code V: Valid registration. All codes
N2311P Piper
PA-22-150
Fixed-wing, single engine Individual owner
North Carolina
Standard 2023-05-18 ValidFAA registration status code V: Valid registration. All codes
N3003Z Piper
PA-22
Fixed-wing, single engine Individual owner
Missouri
Standard 2023-05-18 ValidFAA registration status code V: Valid registration. All codes
N43234 Piper
PA-28-151
Fixed-wing, single engine Level Up Aviation LLC
Newton, Alabama
Standard 2023-05-18 ValidFAA registration status code V: Valid registration. All codes
N4434R Cessna
172M
Fixed-wing, single engine All American Aviation LLC
Fort Worth, Texas
Standard 2023-05-18 ValidFAA registration status code V: Valid registration. All codes
N5530W Piper
PA-28-150
Fixed-wing, single engine Co-owned owner
Oregon
Standard 2023-05-18 ValidFAA registration status code V: Valid registration. All codes
N55701 Piper
PA-28-140
Fixed-wing, single engine Level Up Aviation LLC
Newton, Alabama
Standard 2023-05-18 ValidFAA registration status code V: Valid registration. All codes
N5704U Piper
PA-28-140
Fixed-wing, single engine Zephyr Air LLC
Hickory, North Carolina
Standard 2023-05-18 ValidFAA registration status code V: Valid registration. All codes
N603FT Piper
PA-28-161
Fixed-wing, single engine Florida Institute of Technology
Melbourne, Florida
Standard 2023-05-18 ValidFAA registration status code V: Valid registration. All codes
N64147 Cessna
172M
Fixed-wing, single engine Summit Aviation INC
Kingston, New York
Standard 2023-05-18 ValidFAA registration status code V: Valid registration. All codes
N6899F Piper
PA-28-140
Fixed-wing, single engine Level Up Aviation LLC
Newton, Alabama
Standard 2023-05-18 ValidFAA registration status code V: Valid registration. All codes
N6991W Piper
PA-28-140
Fixed-wing, single engine Individual owner
Kentucky
Standard 2023-05-18 ValidFAA registration status code V: Valid registration. All codes
N7741D Piper
PA-22-150
Fixed-wing, single engine Individual owner
Alaska
Standard 2023-05-18 ValidFAA registration status code V: Valid registration. All codes
N82912 Piper
PA-18-150
Fixed-wing, single engine Individual owner
Alaska
Standard 2023-05-18 ValidFAA registration status code V: Valid registration. All codes
N8410C Piper
PA-28-151
Fixed-wing, single engine Level Up Aviation LLC
Newton, Alabama
Standard 2023-05-18 ValidFAA registration status code V: Valid registration. All codes
N901MP Cessna
172L
Fixed-wing, single engine Individual owner
New Hampshire
Standard 2023-05-18 ValidFAA registration status code V: Valid registration. All codes
N1700J Piper
PA-28-140
Fixed-wing, single engine Stratus Aviation LLC
Newnan, Georgia
Standard 2023-05-17 ValidFAA registration status code V: Valid registration. All codes
N2335J Beech
23
Fixed-wing, single engine Individual owner
Florida
Standard 2023-05-17 ValidFAA registration status code V: Valid registration. All codes
N277SL Cessna
172M
Fixed-wing, single engine Charlies Wings LLC
Salisbury, North Carolina
Standard 2023-05-17 ValidFAA registration status code V: Valid registration. All codes
N3460T Cessna
177
Fixed-wing, single engine Co-owned owner
Alaska
Standard 2023-05-17 ValidFAA registration status code V: Valid registration. All codes
N4262P Piper
PA-23-160
Fixed-wing, multi-engine Individual owner
Texas
Standard 2023-05-17 ValidFAA registration status code V: Valid registration. All codes
N4485T Piper
PA-28-140
Fixed-wing, single engine Co-owned owner
Indiana
Standard 2023-05-17 ValidFAA registration status code V: Valid registration. All codes
N5310D Cessna
172N
Fixed-wing, single engine D & S Aviation LLC
Spring, Texas
Standard 2023-05-17 ValidFAA registration status code V: Valid registration. All codes
N53718 Bellanca
7GCBC
Fixed-wing, single engine Individual owner
Alabama
Standard 2023-05-17 ValidFAA registration status code V: Valid registration. All codes
N58TY Cessna
172N
Fixed-wing, single engine Co-owned owner
Texas
Standard 2023-05-17 ValidFAA registration status code V: Valid registration. All codes
N616AA Cessna
172M
Fixed-wing, single engine Individual owner
Texas
Standard 2023-05-17 ValidFAA registration status code V: Valid registration. All codes
N7146G Cessna
172K
Fixed-wing, single engine Individual owner
Colorado
Standard 2023-05-17 ValidFAA registration status code V: Valid registration. All codes
N7307F Piper
PA-28-140
Fixed-wing, single engine Individual owner
Wyoming
Standard 2023-05-17 ValidFAA registration status code V: Valid registration. All codes
N7485G Cessna
172K
Fixed-wing, single engine Independent Aviation Services LLC
Sachse, Texas
Standard 2023-05-17 ValidFAA registration status code V: Valid registration. All codes
N75967 Cessna
172N
Fixed-wing, single engine Ace of Spades Aviation LLC
Las Vegas, Nevada
Standard 2023-05-17 ValidFAA registration status code V: Valid registration. All codes
N764AA Cessna
172M
Fixed-wing, single engine Wings Over Texas Holdings LLC
Denton, Texas
Standard 2023-05-17 ValidFAA registration status code V: Valid registration. All codes
N8569V Bellanca
7GCBC
Fixed-wing, single engine Individual owner
Louisiana
Multiple 2023-05-17 ValidFAA registration status code V: Valid registration. All codes
N9244H Cessna
172M
Fixed-wing, single engine Coachron Investments LLC
Grosse Ile, Michigan
Standard 2023-05-17 ValidFAA registration status code V: Valid registration. All codes
N964AA Cessna
172N
Fixed-wing, single engine Florida Flight Training Center INC
Venice, Florida
Standard 2023-05-17 ValidFAA registration status code V: Valid registration. All codes
N968AA Cessna
172P
Fixed-wing, single engine Wings Over Texas Holdings LLC
Denton, Texas
Standard 2023-05-17 ValidFAA registration status code V: Valid registration. All codes
N3377P Piper
PA-23-160
Fixed-wing, multi-engine Flying High LLC
Gore, Virginia
Standard 2023-05-16 ValidFAA registration status code V: Valid registration. All codes
N56DG Cessna
172M
Fixed-wing, single engine Eagle East Aviation INC
North Andover, Massachusetts
Standard 2023-05-16 ValidFAA registration status code V: Valid registration. All codes
N6374D Cessna
172N
Fixed-wing, single engine Wings Flight Enterprises INC
Danville, Kentucky
Standard 2023-05-16 ValidFAA registration status code V: Valid registration. All codes
N68499 Bellanca
7GCAA
Fixed-wing, single engine Sheboygan Survey LLC
Waldo, Wisconsin
Standard 2023-05-16 ValidFAA registration status code V: Valid registration. All codes
N6894W Piper
PA-28-140
Fixed-wing, single engine Summit Flight Academy LLC
Peculiar, Missouri
Standard 2023-05-16 ValidFAA registration status code V: Valid registration. All codes
N717RF Cessna
172N
Fixed-wing, single engine Wings Flight Enterprises INC
Danville, Kentucky
Standard 2023-05-16 ValidFAA registration status code V: Valid registration. All codes
N7334F Cessna
172N
Fixed-wing, single engine Wings Flight Enterprises INC
Danville, Kentucky
Standard 2023-05-16 ValidFAA registration status code V: Valid registration. All codes
N733HC Cessna
172N
Fixed-wing, single engine Wings Flight Enterprises INC
Danville, Kentucky
Standard 2023-05-16 ValidFAA registration status code V: Valid registration. All codes
N734RH Cessna
172N
Fixed-wing, single engine Individual owner
South Carolina
Standard 2023-05-16 ValidFAA registration status code V: Valid registration. All codes
N739FG Cessna
172N
Fixed-wing, single engine Wings Flight Enterprises INC
Danville, Kentucky
Standard 2023-05-16 ValidFAA registration status code V: Valid registration. All codes
N79308 Cessna
172K
Fixed-wing, single engine Individual owner
Illinois
Standard 2023-05-16 ValidFAA registration status code V: Valid registration. All codes
N8150D Piper
PA-22-160
Fixed-wing, single engine Bush Pacer LLC
Watauga, Tennessee
Standard 2023-05-16 ValidFAA registration status code V: Valid registration. All codes
N11087 Champion
7GCAA
Fixed-wing, single engine Levanders Aircraft LLC
Grand Island, Nebraska
Standard 2023-05-15 ValidFAA registration status code V: Valid registration. All codes
N2090P Piper
PA-23-150
Fixed-wing, multi-engine Individual owner
Illinois
Standard 2023-05-15 ValidFAA registration status code V: Valid registration. All codes
N36010 Bellanca
7GCBC
Fixed-wing, single engine Co-owned owner
Washington
Standard 2023-05-15 ValidFAA registration status code V: Valid registration. All codes
N40939 Piper
PA-28-140
Fixed-wing, single engine Grog Holdings LLC
Dallas, Texas
Standard 2023-05-15 ValidFAA registration status code V: Valid registration. All codes
N6220W Piper
PA-28-140
Fixed-wing, single engine Individual owner
Illinois
Standard 2023-05-15 ValidFAA registration status code V: Valid registration. All codes
N66884 Piper
PA-18-150
Fixed-wing, single engine Sea2Ski Flying Club INC
Anchorage, Alaska
Standard 2023-05-15 ValidFAA registration status code V: Valid registration. All codes
N783LK Piper
PA-22-150
Fixed-wing, single engine Individual owner
Minnesota
Standard 2023-05-15 ValidFAA registration status code V: Valid registration. All codes
N8044N Piper
PA-28-140
Fixed-wing, single engine N7396W LLC
Coeymans Hollow, New York
Standard 2023-05-15 ValidFAA registration status code V: Valid registration. All codes
N920AJ Cessna
172M
Fixed-wing, single engine American Patrols INC
Midland, Texas
Standard 2023-05-15 ValidFAA registration status code V: Valid registration. All codes
N1537J Piper
PA-28-140
Fixed-wing, single engine Individual owner
Arkansas
Standard 2023-05-14 ValidFAA registration status code V: Valid registration. All codes
N6392W Piper
PA-28-140
Fixed-wing, single engine Nebraska Indian Community College
Macy, Nebraska
Standard 2023-05-14 ValidFAA registration status code V: Valid registration. All codes
N737BB Cessna
172N
Fixed-wing, single engine Individual owner
Florida
Standard 2023-05-14 ValidFAA registration status code V: Valid registration. All codes
N170WT Piper
PA-12
Fixed-wing, single engine Individual owner
Alaska
Restricted 2023-05-13 ValidFAA registration status code V: Valid registration. All codes
N2761P Piper
PA-22-150
Fixed-wing, single engine Individual owner
Texas
Standard 2023-05-13 ValidFAA registration status code V: Valid registration. All codes
N3840Z Piper
PA-18-150
Fixed-wing, single engine Co-owned owner
Virginia
Standard 2023-05-13 ValidFAA registration status code V: Valid registration. All codes
N41380 Piper
PA-28-151
Fixed-wing, single engine Individual owner
California
Standard 2023-05-13 ValidFAA registration status code V: Valid registration. All codes
N433RA Piper
PA-28-140
Fixed-wing, single engine Individual owner
Ohio
Standard 2023-05-13 ValidFAA registration status code V: Valid registration. All codes
N5087J Cessna
172N
Fixed-wing, single engine Individual owner
Arkansas
Standard 2023-05-13 ValidFAA registration status code V: Valid registration. All codes
N6380E Cessna
172N
Fixed-wing, single engine Cessna N6380E LLC
Spring Branch, Texas
Standard 2023-05-13 ValidFAA registration status code V: Valid registration. All codes
N642AW Cessna
172M
Fixed-wing, single engine Hobart Aviation INC
Akron, Ohio
Standard 2023-05-13 ValidFAA registration status code V: Valid registration. All codes
N733AK Cessna
172N
Fixed-wing, single engine Parker Helicopters INC
Watsonville, California
Standard 2023-05-13 ValidFAA registration status code V: Valid registration. All codes
N8373V Champion
7GCAA
Fixed-wing, single engine Individual owner
North Dakota
Restricted 2023-05-13 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 8, 2026. Horsepower and thrust are the FAA's figures for the series, not for a particular aircraft.