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
N4102P Piper
PA-23-160
Fixed-wing, multi-engine Individual owner
Ohio
Standard 2018-12-15 ValidFAA registration status code V: Valid registration. All codes
N4403J Piper
PA-28-140
Fixed-wing, single engine Individual owner
Georgia
Standard 2018-12-15 ValidFAA registration status code V: Valid registration. All codes
N4422A Piper
PA-22-150
Fixed-wing, single engine Co-owned owner
Utah
Standard 2018-12-15 ValidFAA registration status code V: Valid registration. All codes
N5299S Piper
PA-28-140
Fixed-wing, single engine Individual owner
Texas
Standard 2018-12-15 ValidFAA registration status code V: Valid registration. All codes
N5562F Piper
PA-28-140
Fixed-wing, single engine Individual owner
California
Standard 2018-12-15 ValidFAA registration status code V: Valid registration. All codes
N55716 Piper
PA-28-140
Fixed-wing, single engine Norby Aviation LLC
Hopkinton, Massachusetts
Standard 2018-12-15 ValidFAA registration status code V: Valid registration. All codes
N5685W Piper
PA-28-160
Fixed-wing, single engine Individual owner
Oklahoma
Standard 2018-12-15 ValidFAA registration status code V: Valid registration. All codes
N64209 Cessna
172M
Fixed-wing, single engine Individual owner
Alaska
Standard 2018-12-15 ValidFAA registration status code V: Valid registration. All codes
N6944E Cessna
172N
Fixed-wing, single engine Individual owner
Oklahoma
Standard 2018-12-15 ValidFAA registration status code V: Valid registration. All codes
N737QP Cessna
172N
Fixed-wing, single engine Starlin Air LLC
Crawfordsville, Indiana
Standard 2018-12-15 ValidFAA registration status code V: Valid registration. All codes
N381MA American Champion Aircraft
7GCBC
Fixed-wing, single engine Knight Wings LLC
Matthews, North Carolina
Standard 2018-12-14 ValidFAA registration status code V: Valid registration. All codes
N734UQ Cessna
172N
Fixed-wing, single engine Future Technologies INC
Colonia, New Jersey
Standard 2018-12-14 ValidFAA registration status code V: Valid registration. All codes
N8402R Piper
PA-28-140
Fixed-wing, single engine Livengood Leasing CO LLC
Mesa, Arizona
Standard 2018-12-14 ValidFAA registration status code V: Valid registration. All codes
N31272 Bellanca
7GCBC
Fixed-wing, single engine Individual owner
Oregon
Standard 2018-12-13 ValidFAA registration status code V: Valid registration. All codes
N3879Z Piper
PA-18-150
Fixed-wing, single engine Co-owned owner
South Dakota
Standard 2018-12-13 ValidFAA registration status code V: Valid registration. All codes
N75649 Cessna
172N
Fixed-wing, single engine New Horizons Aviation INC
Goshen, Indiana
Standard 2018-12-13 ValidFAA registration status code V: Valid registration. All codes
N4190Z Piper
PA-18-150
Fixed-wing, single engine Individual owner
Oregon
Standard 2018-12-12 ValidFAA registration status code V: Valid registration. All codes
N44597 Piper
PA-28-140
Fixed-wing, single engine Tob Cherokee Flyers
Kasson, Minnesota
Standard 2018-12-12 ValidFAA registration status code V: Valid registration. All codes
N4651D Cessna
172N
Fixed-wing, single engine Individual owner
Texas
Standard 2018-12-12 ValidFAA registration status code V: Valid registration. All codes
N3394Z Piper
PA-18A
Fixed-wing, single engine Co-owned owner
Alaska
Restricted 2018-12-11 ValidFAA registration status code V: Valid registration. All codes
N84147 Cessna
172K
Fixed-wing, single engine Individual owner
Texas
Standard 2018-12-11 ValidFAA registration status code V: Valid registration. All codes
N140FL Piper
PA-28-140
Fixed-wing, single engine Individual owner
Arizona
Standard 2018-12-10 ValidFAA registration status code V: Valid registration. All codes
N26GB Piper
PA-18-150
Fixed-wing, single engine Co-owned owner
Florida
Standard 2018-12-10 ValidFAA registration status code V: Valid registration. All codes
N33404 Piper
PA-28-151
Fixed-wing, single engine Individual owner
Florida
Standard 2018-12-10 ValidFAA registration status code V: Valid registration. All codes
N4979E Holmes Ernest W
OSPREY II
Fixed-wing, single engine Individual owner
New Hampshire
Experimental 2018-12-10 ValidFAA registration status code V: Valid registration. All codes
N3875X Aero Commander
100
Fixed-wing, single engine Individual owner
Rhode Island
Standard 2018-12-07 ValidFAA registration status code V: Valid registration. All codes
N1246U Cessna
172M
Fixed-wing, single engine Individual owner
Iowa
Standard 2018-12-06 ValidFAA registration status code V: Valid registration. All codes
N6164W Piper
PA-28-140
Fixed-wing, single engine Individual owner
Kentucky
Standard 2018-12-06 ValidFAA registration status code V: Valid registration. All codes
N64414 Cessna
172M
Fixed-wing, single engine Skyhawk N64414 LLC
Walpole, Massachusetts
Standard 2018-12-06 ValidFAA registration status code V: Valid registration. All codes
N733JL Cessna
172N
Fixed-wing, single engine Co-owned owner
California
Standard 2018-12-06 ValidFAA registration status code V: Valid registration. All codes
N117JS Stevens James K
RV-4
Fixed-wing, single engine Individual owner
Ohio
Experimental 2018-12-04 ValidFAA registration status code V: Valid registration. All codes
N3080E Cessna
172N
Fixed-wing, single engine Sky Safety INC
San Antonio, Texas
Standard 2018-12-04 ValidFAA registration status code V: Valid registration. All codes
N7178L Grumman American Avn. Corp.
AA-5
Fixed-wing, single engine Ri Flying Club INC
Fullerton, California
Standard 2018-12-04 ValidFAA registration status code V: Valid registration. All codes
N79943 Cessna
172K
Fixed-wing, single engine Individual owner
Texas
Standard 2018-12-04 ValidFAA registration status code V: Valid registration. All codes
N888WT Kuenen Boudeyn P
TAILWIND W-10
Fixed-wing, single engine Individual owner
Tennessee
Experimental 2018-12-04 ValidFAA registration status code V: Valid registration. All codes
N951RV Kroells Curtis E
RV9A
Fixed-wing, single engine Individual owner
Minnesota
Experimental 2018-12-04 ValidFAA registration status code V: Valid registration. All codes
N103JS Sloan Jerry
LONG-EZ
Fixed-wing, single engine Individual owner
California
Experimental 2018-12-03 ValidFAA registration status code V: Valid registration. All codes
N118ML Lewis Dean M
SUPER DIAMANT CP-605
Fixed-wing, single engine Individual owner
Iowa
Experimental 2018-12-03 ValidFAA registration status code V: Valid registration. All codes
N1471E Cessna
172N
Fixed-wing, single engine Kdrd Holdings LLC
Texas City, Texas
Standard 2018-12-03 ValidFAA registration status code V: Valid registration. All codes
N6586H Cessna
172M
Fixed-wing, single engine Oracle Aviation LLC
Omaha, Nebraska
Standard 2018-12-03 ValidFAA registration status code V: Valid registration. All codes
N733CM Cessna
172N
Fixed-wing, single engine Individual owner
Florida
Standard 2018-12-03 ValidFAA registration status code V: Valid registration. All codes
N92141 Cessna
172M
Fixed-wing, single engine High Flight Academy LLC
Allison Park, Pennsylvania
Standard 2018-12-03 ValidFAA registration status code V: Valid registration. All codes
N2117K Luscombe
8E
Fixed-wing, single engine Temptation Motors LTD
Hayward, California
Standard 2018-12-01 ValidFAA registration status code V: Valid registration. All codes
N2838Z Piper
PA-22-160
Fixed-wing, single engine Individual owner
Alaska
Standard 2018-12-01 ValidFAA registration status code V: Valid registration. All codes
N4359W Beech
B19
Fixed-wing, single engine Individual owner
Utah
Standard 2018-12-01 ValidFAA registration status code V: Valid registration. All codes
N5083V Varga Aircraft Corp.
2150A
Fixed-wing, single engine Individual owner
Illinois
Standard 2018-12-01 ValidFAA registration status code V: Valid registration. All codes
N5913D Piper
PA-22-150
Fixed-wing, single engine Individual owner
Alaska
Standard 2018-12-01 ValidFAA registration status code V: Valid registration. All codes
N6395W Piper
PA-28-140
Fixed-wing, single engine Co-owned owner
Missouri
Standard 2018-12-01 ValidFAA registration status code V: Valid registration. All codes
N6611D Cessna
172N
Fixed-wing, single engine Individual owner
California
Standard 2018-12-01 ValidFAA registration status code V: Valid registration. All codes
N6824W Piper
PA-28-140
Fixed-wing, single engine Co-owned owner
Florida
Standard 2018-12-01 ValidFAA registration status code V: Valid registration. All codes
N5704F Piper
PA-28-140
Fixed-wing, single engine James Alfred F
Katy, Texas
Standard 2018-11-30 ValidFAA registration status code V: Valid registration. All codes
N8786C Piper
PA-28-151
Fixed-wing, single engine 8786C LLC
Cleburne, Texas
Standard 2018-11-30 ValidFAA registration status code V: Valid registration. All codes
N9858W Piper
PA-28-140
Fixed-wing, single engine Co-owned owner
Michigan
Standard 2018-11-30 ValidFAA registration status code V: Valid registration. All codes
N580FL Piper
PA-28-140
Fixed-wing, single engine Waves4Days LLC
El Segundo, California
Standard 2018-11-29 ValidFAA registration status code V: Valid registration. All codes
N5891L American
AA-5
Fixed-wing, single engine Individual owner
Pennsylvania
Standard 2018-11-29 ValidFAA registration status code V: Valid registration. All codes
N6092W Piper
PA-28-140
Fixed-wing, single engine Individual owner
Kansas
Standard 2018-11-29 ValidFAA registration status code V: Valid registration. All codes
N738NU Cessna
172N
Fixed-wing, single engine Aeroflyin CORP
Miramar, Florida
Standard 2018-11-29 ValidFAA registration status code V: Valid registration. All codes
N73946 Cessna
172N
Fixed-wing, single engine Carastro Enterprises LLC
Montgomery, Alabama
Standard 2018-11-29 ValidFAA registration status code V: Valid registration. All codes
N84633 Cessna
172K
Fixed-wing, single engine Individual owner
Alaska
Standard 2018-11-29 ValidFAA registration status code V: Valid registration. All codes
N9913U Grumman American Avn. Corp.
AA-5A
Fixed-wing, single engine Individual owner
Illinois
Standard 2018-11-29 ValidFAA registration status code V: Valid registration. All codes
N15619 Piper
PA-28-140
Fixed-wing, single engine Mrnak Andy M
Bowman, North Dakota
Standard 2018-11-28 ValidFAA registration status code V: Valid registration. All codes
N21956 Cessna
172M
Fixed-wing, single engine Lake Elmo Flyers LLC
Vadnais Heights, Minnesota
Standard 2018-11-28 ValidFAA registration status code V: Valid registration. All codes
N6059H Piper
PA-28-161
Fixed-wing, single engine Individual owner
Oregon
Standard 2018-11-27 ValidFAA registration status code V: Valid registration. All codes
N7257J Piper
PA-28-140
Fixed-wing, single engine Individual owner
Texas
Standard 2018-11-27 ValidFAA registration status code V: Valid registration. All codes
N1001M Cessna
172L
Fixed-wing, single engine Rocky Mountain Ventures INC
Cheyenne, Wyoming
Standard 2018-11-26 ValidFAA registration status code V: Valid registration. All codes
N733VF Cessna
172N
Fixed-wing, single engine Co-owned owner
California
Standard 2018-11-26 ValidFAA registration status code V: Valid registration. All codes
N519AC American Champion Aircraft
7GCBC
Fixed-wing, single engine C & J Air INC
Middletown, Delaware
Standard 2018-11-21 ValidFAA registration status code V: Valid registration. All codes
N5273S Piper
PA-28-140
Fixed-wing, single engine Carnegie Nursing Home INC
Carnegie, Oklahoma
Standard 2018-11-21 ValidFAA registration status code V: Valid registration. All codes
N54763 Piper
PA-18-150
Fixed-wing, single engine Individual owner
Alaska
Standard 2018-11-21 ValidFAA registration status code V: Valid registration. All codes
N9169D Piper
PA-22-160
Fixed-wing, single engine Individual owner
Nebraska
Standard 2018-11-20 ValidFAA registration status code V: Valid registration. All codes
N9607W Piper
PA-28-140
Fixed-wing, single engine K-9 Handler LLC
Henderson, Nevada
Standard 2018-11-20 ValidFAA registration status code V: Valid registration. All codes
N7189Q Cessna
172L
Fixed-wing, single engine Individual owner
Virginia
Standard 2018-11-19 ValidFAA registration status code V: Valid registration. All codes
N7540D Piper
PA-22-150
Fixed-wing, single engine Individual owner
Pennsylvania
Standard 2018-11-19 ValidFAA registration status code V: Valid registration. All codes
N7728K Piper
PA-20
Fixed-wing, single engine Individual owner
Colorado
Restricted 2018-11-19 ValidFAA registration status code V: Valid registration. All codes
N8071X Piper
PA-28-161
Fixed-wing, single engine Florida Aviation Career Training INC
Saint Augustine, Florida
Standard 2018-11-19 ValidFAA registration status code V: Valid registration. All codes
N8701N Piper
PA-28-140
Fixed-wing, single engine Individual owner
Pennsylvania
Standard 2018-11-19 ValidFAA registration status code V: Valid registration. All codes
N35711 Cessna
172I
Fixed-wing, single engine Individual owner
Ohio
Standard 2018-11-17 ValidFAA registration status code V: Valid registration. All codes
N64367 Cessna
172M
Fixed-wing, single engine Co-owned owner
Texas
Standard 2018-11-17 ValidFAA registration status code V: Valid registration. All codes
N83381 Piper
PA-18-150
Fixed-wing, single engine Fishfull Thinking LLC
Cordova, Alaska
Standard 2018-11-17 ValidFAA registration status code V: Valid registration. All codes
N1017P Piper
PA-23
Fixed-wing, multi-engine Individual owner
Alabama
Standard 2018-11-16 ValidFAA registration status code V: Valid registration. All codes
N46410 Cessna
172K
Fixed-wing, single engine Individual owner
Alaska
Standard 2018-11-16 ValidFAA registration status code V: Valid registration. All codes
N512JH Hardison John Gary
RV9
Fixed-wing, single engine Co-owned owner
Nevada
Experimental 2018-11-16 ValidFAA registration status code V: Valid registration. All codes
N98308 Piper
PA-28-140
Fixed-wing, single engine Co-owned owner
Kansas
Standard 2018-11-16 ValidFAA registration status code V: Valid registration. All codes
N19646 Cessna
172L
Fixed-wing, single engine All2Fly LLC
Atlanta, Georgia
Standard 2018-11-14 ValidFAA registration status code V: Valid registration. All codes
N20AK Randall R/Randall J
GLASTAR
Fixed-wing, single engine Individual owner
Alaska
Experimental 2018-11-14 ValidFAA registration status code V: Valid registration. All codes
N2399L Beech
23
Fixed-wing, single engine Msd Aviation of Seymour LLC
Seymour, Indiana
Standard 2018-11-14 ValidFAA registration status code V: Valid registration. All codes
N3890Z Piper
PA-18-150
Fixed-wing, single engine Individual owner
North Dakota
Standard 2018-11-14 ValidFAA registration status code V: Valid registration. All codes
N4252T Piper
PA-28-140
Fixed-wing, single engine 9G LLC
Centerville, Tennessee
Standard 2018-11-14 ValidFAA registration status code V: Valid registration. All codes
N5138S Piper
PA-28-140
Fixed-wing, single engine Individual owner
Texas
Standard 2018-11-14 ValidFAA registration status code V: Valid registration. All codes
N54025 Piper
PA-18-150
Fixed-wing, single engine Individual owner
Alaska
Standard 2018-11-14 ValidFAA registration status code V: Valid registration. All codes
N6173D Piper
PA-22-150
Fixed-wing, single engine Ars Logistics LLC
Hackettstown, New Jersey
Standard 2018-11-14 ValidFAA registration status code V: Valid registration. All codes
N6996B Piper
PA-18-150
Fixed-wing, single engine Individual owner
Montana
Standard 2018-11-14 ValidFAA registration status code V: Valid registration. All codes
N7489L Piper
PA-18-150
Fixed-wing, single engine Individual owner
Michigan
Standard 2018-11-14 ValidFAA registration status code V: Valid registration. All codes
N7784G Cessna
172L
Fixed-wing, single engine All2Fly LLC
Atlanta, Georgia
Standard 2018-11-14 ValidFAA registration status code V: Valid registration. All codes
N526KG Piper
PA-18-150
Fixed-wing, single engine Individual owner
Alaska
Standard 2018-11-13 ValidFAA registration status code V: Valid registration. All codes
N238MA Allardyce Michael
GLASTAR
Fixed-wing, single engine Fogg Phillip G
Aurora, Oregon
Experimental 2018-11-09 ValidFAA registration status code V: Valid registration. All codes
N26679 Grumman American Avn. Corp.
AA-5A
Fixed-wing, single engine Individual owner
Texas
Standard 2018-11-09 ValidFAA registration status code V: Valid registration. All codes
N61641 Cessna
172M
Fixed-wing, single engine Individual owner
Illinois
Standard 2018-11-08 ValidFAA registration status code V: Valid registration. All codes
N734BH Cessna
172N
Fixed-wing, single engine My Way Aviation LLC
Weston, Florida
Standard 2018-11-08 ValidFAA registration status code V: Valid registration. All codes
N7930F Piper
PA-28-151
Fixed-wing, single engine Ixi LLC
West Bloomfield, Michigan
Standard 2018-11-08 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.