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
N7923L Beech
A23-19
Fixed-wing, single engine Co-owned owner
Wisconsin
Standard 2024-09-19 ValidFAA registration status code V: Valid registration. All codes
N8902D Piper
PA-22-160
Fixed-wing, single engine Co-owned owner
Alaska
Standard 2024-09-19 ValidFAA registration status code V: Valid registration. All codes
N32300 Piper
PA-28-151
Fixed-wing, single engine Primary Flight Control LLC
Fleming Island, Florida
Standard 2024-09-18 ValidFAA registration status code V: Valid registration. All codes
N4107Z Piper
PA-18-150
Fixed-wing, single engine Missaukee Aircraft Leasing LLC
Cadillac, Michigan
Standard 2024-09-18 ValidFAA registration status code V: Valid registration. All codes
N47HJ Harris John W
WITTMAN TAILWIND
Fixed-wing, single engine Individual owner
Florida
Experimental 2024-09-18 ValidFAA registration status code V: Valid registration. All codes
N4975G Cessna
172N
Fixed-wing, single engine Bermuda Dunes Flight Training LLC
Palm Desert, California
Standard 2024-09-18 ValidFAA registration status code V: Valid registration. All codes
N5128D Cessna
172N
Fixed-wing, single engine Kingsky Flight Academy LLC
Lakeland, Florida
Standard 2024-09-18 ValidFAA registration status code V: Valid registration. All codes
N6738W Piper
PA-28-140
Fixed-wing, single engine Individual owner
Mississippi
Standard 2024-09-18 ValidFAA registration status code V: Valid registration. All codes
N1191U Cessna
172M
Fixed-wing, single engine Flitepro INC
Murrieta, California
Standard 2024-09-17 ValidFAA registration status code V: Valid registration. All codes
N200CW Maule
MX-7-160
Fixed-wing, single engine Skylake Adventures LLC
Geneva, Ohio
Standard 2024-09-17 ValidFAA registration status code V: Valid registration. All codes
N2990D Bellanca
7GCBC
Fixed-wing, single engine Co-owned owner
Colorado
Standard 2024-09-17 ValidFAA registration status code V: Valid registration. All codes
N4157U Piper
PA-18-150
Fixed-wing, single engine Aeromarine Holdings LLC
Waukesha, Wisconsin
Standard 2024-09-17 ValidFAA registration status code V: Valid registration. All codes
N442FA Robinson Helicopter
R22 BETA
Helicopter Individual owner
Virginia
Standard 2024-09-17 ValidFAA registration status code V: Valid registration. All codes
N4854G Cessna
172N
Fixed-wing, single engine Milwaukee Aero LLC
Milwaukee, Wisconsin
Standard 2024-09-17 ValidFAA registration status code V: Valid registration. All codes
N918FA Cessna
172P
Fixed-wing, single engine Westways Aviation LLC
El Cajon, California
Standard 2024-09-17 ValidFAA registration status code V: Valid registration. All codes
N9842G Cessna
172L
Fixed-wing, single engine Nighthawk N8231G LLC
Pompano Beach, Florida
Standard 2024-09-17 ValidFAA registration status code V: Valid registration. All codes
N99826 Cessna
172P
Fixed-wing, single engine Cp Aviation
Santa Paula, California
Standard 2024-09-17 ValidFAA registration status code V: Valid registration. All codes
N1118N Robinson Helicopter
R22 BETA
Helicopter Jets To Helis LLC DBA
Chandler, Arizona
Standard 2024-09-16 ValidFAA registration status code V: Valid registration. All codes
N15148 Piper
PA-28-140
Fixed-wing, single engine Individual owner
Alabama
Standard 2024-09-16 ValidFAA registration status code V: Valid registration. All codes
N2895Q Cessna
172L
Fixed-wing, single engine American Patrols INC
Midland, Texas
Standard 2024-09-16 ValidFAA registration status code V: Valid registration. All codes
N3695Z Piper
PA-18-150
Fixed-wing, single engine Co-owned owner
California
Standard 2024-09-16 ValidFAA registration status code V: Valid registration. All codes
N3884P Piper
PA-18A 150
Fixed-wing, single engine Individual owner
Alaska
Multiple 2024-09-16 ValidFAA registration status code V: Valid registration. All codes
N7525D Piper
PA-22-150
Fixed-wing, single engine Redhanded LLC
Dover, Delaware
Standard 2024-09-16 ValidFAA registration status code V: Valid registration. All codes
N470KC Heine August W
RV-4
Fixed-wing, single engine Individual owner
Washington
Experimental 2024-09-14 ValidFAA registration status code V: Valid registration. All codes
N7467L Piper
PA-18-150
Fixed-wing, single engine Individual owner
Alaska
Restricted 2024-09-14 ValidFAA registration status code V: Valid registration. All codes
N13559 Cessna
172M
Fixed-wing, single engine Individual owner
Indiana
Standard 2024-09-13 ValidFAA registration status code V: Valid registration. All codes
N32397 Piper
PA-28-140
Fixed-wing, single engine Individual owner
New York
Standard 2024-09-13 ValidFAA registration status code V: Valid registration. All codes
N3541P Piper
PA-22-150
Fixed-wing, single engine Individual owner
Michigan
Standard 2024-09-13 ValidFAA registration status code V: Valid registration. All codes
N733GQ Cessna
172N
Fixed-wing, single engine Marc Aircraft Holding LLC
Soldotna, Alaska
Standard 2024-09-13 ValidFAA registration status code V: Valid registration. All codes
N119A Piper
PA-28-140
Fixed-wing, single engine 2Is Partners LLC
Vero Beach, Florida
Standard 2024-09-12 ValidFAA registration status code V: Valid registration. All codes
N1931V Cessna
172M
Fixed-wing, single engine Withheld at owner's request
Standard 2024-09-12 ValidFAA registration status code V: Valid registration. All codes
N202NY Cessna
172P
Fixed-wing, single engine Kingsky Flight Academy LLC
Lakeland, Florida
Standard 2024-09-12 ValidFAA registration status code V: Valid registration. All codes
N231SC Cessna
172M
Fixed-wing, single engine Individual owner
Georgia
Standard 2024-09-12 ValidFAA registration status code V: Valid registration. All codes
N5296B Mooney Aircraft Corp.
M20
Fixed-wing, single engine Individual owner
Arizona
Standard 2024-09-12 ValidFAA registration status code V: Valid registration. All codes
N6147D Piper
PA-22-150
Fixed-wing, single engine Withheld at owner's request
Standard 2024-09-12 ValidFAA registration status code V: Valid registration. All codes
N621FL Piper
PA-28-140
Fixed-wing, single engine Individual owner
California
Standard 2024-09-12 ValidFAA registration status code V: Valid registration. All codes
N644K Stapleton Bill
RV-6
Fixed-wing, single engine Individual owner
Texas
Experimental 2024-09-12 ValidFAA registration status code V: Valid registration. All codes
N6544K Cessna
172P
Fixed-wing, single engine Individual owner
Ohio
Standard 2024-09-12 ValidFAA registration status code V: Valid registration. All codes
N6591E Cessna
172N
Fixed-wing, single engine Individual owner
Arizona
Standard 2024-09-12 ValidFAA registration status code V: Valid registration. All codes
N1957F Cessna
172N
Fixed-wing, single engine Individual owner
Texas
Standard 2024-09-11 ValidFAA registration status code V: Valid registration. All codes
N31696 Dart
GC
Fixed-wing, single engine Co-owned owner
Oregon
Standard 2024-09-11 ValidFAA registration status code V: Valid registration. All codes
N318PW Cessna
172M
Fixed-wing, single engine N318Pw LLC
New Canaan, Connecticut
Standard 2024-09-11 ValidFAA registration status code V: Valid registration. All codes
N672FC Cessna
172N
Fixed-wing, single engine Blackhawk Holding CORP
Wilmington, Delaware
Standard 2024-09-11 ValidFAA registration status code V: Valid registration. All codes
N4916T Piper
PA-28-140
Fixed-wing, single engine Arithansa LLC
Big Bear City, California
Standard 2024-09-10 ValidFAA registration status code V: Valid registration. All codes
N245ER Socata
TB 9 TAMPICO
Fixed-wing, single engine Individual owner
Florida
Standard 2024-09-09 ValidFAA registration status code V: Valid registration. All codes
N4609Q Cessna
172M
Fixed-wing, single engine N4609Q LLC
Opa-Locka, Florida
Standard 2024-09-09 ValidFAA registration status code V: Valid registration. All codes
N519MA American Champion Aircraft
7GCAA
Fixed-wing, single engine Red Baron LLC
Middletown, Delaware
Standard 2024-09-09 ValidFAA registration status code V: Valid registration. All codes
N5366K Cessna
172P
Fixed-wing, single engine American Patrols INC
Midland, Texas
Standard 2024-09-09 ValidFAA registration status code V: Valid registration. All codes
N6451W Piper
PA-28-140
Fixed-wing, single engine Individual owner
Arizona
Standard 2024-09-09 ValidFAA registration status code V: Valid registration. All codes
N739XW Cessna
172N
Fixed-wing, single engine Whole Life Wellness Center
Alpine, Texas
Standard 2024-09-09 ValidFAA registration status code V: Valid registration. All codes
N15807 Piper
PA-28-140
Fixed-wing, single engine Individual owner
Louisiana
Standard 2024-09-07 ValidFAA registration status code V: Valid registration. All codes
N221BC Piper
PA-18
Fixed-wing, single engine Co-owned owner
Alaska
Multiple 2024-09-07 ValidFAA registration status code V: Valid registration. All codes
N3698M Piper
PA-12
Fixed-wing, single engine Individual owner
Alaska
Restricted 2024-09-07 ValidFAA registration status code V: Valid registration. All codes
N614RG Graham Rodney D
RV-4
Fixed-wing, single engine Little Shiz Llcr LLC
Kalispell, Montana
Experimental 2024-09-07 ValidFAA registration status code V: Valid registration. All codes
N62890 Cessna
172P
Fixed-wing, single engine Fixed Wing Holding CO INC
Pembroke Pines, Florida
Standard 2024-09-07 ValidFAA registration status code V: Valid registration. All codes
N62938 Cessna
172P
Fixed-wing, single engine Two Guys Aviation LLC
Idaho Falls, Idaho
Standard 2024-09-07 ValidFAA registration status code V: Valid registration. All codes
N2837T Piper
PA-28-140
Fixed-wing, single engine Individual owner
Texas
Standard 2024-09-06 ValidFAA registration status code V: Valid registration. All codes
N5073V Varga Aircraft Corp.
2150A
Fixed-wing, single engine Co-owned owner
Oklahoma
Standard 2024-09-06 ValidFAA registration status code V: Valid registration. All codes
N5876L Grumman American Avn. Corp.
AA-5
Fixed-wing, single engine Individual owner
Texas
Standard 2024-09-06 ValidFAA registration status code V: Valid registration. All codes
N6245D Cessna
172N
Fixed-wing, single engine Jeffery & Weiss Holdings LLC
Long Beach, California
Standard 2024-09-06 ValidFAA registration status code V: Valid registration. All codes
N8021D Piper
PA-22-150
Fixed-wing, single engine Arctic Super Pacer LLC
Anchorage, Alaska
Standard 2024-09-06 ValidFAA registration status code V: Valid registration. All codes
N8142K Piper
PA-28-161
Fixed-wing, single engine Individual owner
California
Standard 2024-09-06 ValidFAA registration status code V: Valid registration. All codes
N13333 Cessna
172M
Fixed-wing, single engine Co-owned owner
Washington
Standard 2024-09-05 ValidFAA registration status code V: Valid registration. All codes
N142ND Piper
PA-28-161
Fixed-wing, single engine Skyblue Aviation Cr INC
Merritt Island, Florida
Standard 2024-09-05 ValidFAA registration status code V: Valid registration. All codes
N1720Z Cessna
172N
Fixed-wing, single engine Bend Aircraft Mechanics LLC
Bend, Oregon
Standard 2024-09-05 ValidFAA registration status code V: Valid registration. All codes
N41553 Piper
PA-18-150
Fixed-wing, single engine Golden Arrow Aviation INC
Wilmington, Delaware
Standard 2024-09-05 ValidFAA registration status code V: Valid registration. All codes
N4167Z Piper
PA-18-150
Fixed-wing, single engine Golden Arrow Aviation INC
Wilmington, Delaware
Standard 2024-09-05 ValidFAA registration status code V: Valid registration. All codes
N5068W Piper
PA-28
Fixed-wing, single engine Individual owner
New York
Standard 2024-09-05 ValidFAA registration status code V: Valid registration. All codes
N514W Winchester-Pitts Special
S-1C
Fixed-wing, single engine Cassill Aircraft Leasing
Cedar Rapids, Iowa
Experimental 2024-09-05 ValidFAA registration status code V: Valid registration. All codes
N55938 Piper
PA-28-140
Fixed-wing, single engine Individual owner
Texas
Standard 2024-09-05 ValidFAA registration status code V: Valid registration. All codes
N97WK Kirkpatrick Willis W Iii
RV6A
Fixed-wing, single engine Individual owner
North Carolina
Experimental 2024-09-05 ValidFAA registration status code V: Valid registration. All codes
N3918Q Cessna
172L
Fixed-wing, single engine Aviation Academy LLC
Wichita, Kansas
Standard 2024-09-04 ValidFAA registration status code V: Valid registration. All codes
N803EH Robinson Helicopter
R22 BETA
Helicopter Continental Helicopters INC
Sheffield, Texas
Standard 2024-09-04 ValidFAA registration status code V: Valid registration. All codes
N16AE Ellison Alan T
LONG-EZ
Fixed-wing, single engine Individual owner
Arizona
Experimental 2024-09-03 ValidFAA registration status code V: Valid registration. All codes
N7761D Piper
PA-18A 150
Fixed-wing, single engine State of Alaska
Fairbanks, Alaska
Multiple 2024-09-03 ValidFAA registration status code V: Valid registration. All codes
N2124F Piper
PA-28-161
Fixed-wing, single engine Individual owner
California
Standard 2024-09-02 ValidFAA registration status code V: Valid registration. All codes
N2748G Champion
7GCAA
Fixed-wing, single engine Noe Aviation LLC
Vinton, Iowa
Standard 2024-09-02 ValidFAA registration status code V: Valid registration. All codes
N4631V Varga Aircraft Corp.
2150A
Fixed-wing, single engine Co-owned owner
Ohio
Standard 2024-09-02 ValidFAA registration status code V: Valid registration. All codes
N79RA American Champion Aircraft
7GCBC
Fixed-wing, single engine Withheld at owner's request
Standard 2024-09-02 ValidFAA registration status code V: Valid registration. All codes
N19860 Cessna
172M
Fixed-wing, single engine Rvb71 LLC
Braxton, Mississippi
Standard 2024-09-01 ValidFAA registration status code V: Valid registration. All codes
N41969 Piper
PA-28-151
Fixed-wing, single engine Lazy 8 Aviation LLC
Arden, North Carolina
Standard 2024-09-01 ValidFAA registration status code V: Valid registration. All codes
N5548U Piper
PA-28-140
Fixed-wing, single engine Individual owner
Arizona
Standard 2024-09-01 ValidFAA registration status code V: Valid registration. All codes
N770FT Gulfstream American Corp
AA-5A
Fixed-wing, single engine Individual owner
New York
Standard 2024-09-01 ValidFAA registration status code V: Valid registration. All codes
N80773 Cessna
172M
Fixed-wing, single engine Individual owner
California
Standard 2024-09-01 ValidFAA registration status code V: Valid registration. All codes
N1291F Cessna
172N
Fixed-wing, single engine Withheld at owner's request
Standard 2024-08-31 ValidFAA registration status code V: Valid registration. All codes
N265B Colonial
C-1
Fixed-wing, single engine Individual owner
South Dakota
Standard 2024-08-31 ValidFAA registration status code V: Valid registration. All codes
N2813Q Cessna
172L
Fixed-wing, single engine Original Design Ministries
Eatonville, Washington
Standard 2024-08-31 ValidFAA registration status code V: Valid registration. All codes
N5703U Piper
PA-28-140
Fixed-wing, single engine Xcelleration Aviation INC
Sarasota, Florida
Standard 2024-08-31 ValidFAA registration status code V: Valid registration. All codes
N6553D Cessna
172N
Fixed-wing, single engine Llv Aviation LLC
Wilmington, Delaware
Standard 2024-08-31 ValidFAA registration status code V: Valid registration. All codes
N64269 Cessna
172M
Fixed-wing, single engine Flyit LLC
Camas, Washington
Standard 2024-08-30 ValidFAA registration status code V: Valid registration. All codes
N67CN Cessna
172K
Fixed-wing, single engine Individual owner
Michigan
Standard 2024-08-30 ValidFAA registration status code V: Valid registration. All codes
N734GE Cessna
172N
Fixed-wing, single engine Individual owner
Colorado
Standard 2024-08-30 ValidFAA registration status code V: Valid registration. All codes
N7817D Piper
PA-22-150
Fixed-wing, single engine Individual owner
Maine
Standard 2024-08-30 ValidFAA registration status code V: Valid registration. All codes
N78603 Cessna
172K
Fixed-wing, single engine Beaufort Flight Training LLC
Beaufort, South Carolina
Standard 2024-08-30 ValidFAA registration status code V: Valid registration. All codes
N20430 Robinson Helicopter
R22 BETA
Helicopter Jets To Helis LLC DBA
Chandler, Arizona
Standard 2024-08-29 ValidFAA registration status code V: Valid registration. All codes
N26796 Grumman American Avn. Corp.
AA-5A
Fixed-wing, single engine Individual owner
Georgia
Standard 2024-08-29 ValidFAA registration status code V: Valid registration. All codes
N5431W Piper
PA-28-150
Fixed-wing, single engine Big Daddys Casino INC
Huntington, West Virginia
Standard 2024-08-29 ValidFAA registration status code V: Valid registration. All codes
N6841L Grumman American Avn. Corp.
AA-5A
Fixed-wing, single engine Individual owner
New Jersey
Standard 2024-08-29 ValidFAA registration status code V: Valid registration. All codes
N6841W Piper
PA-28-140
Fixed-wing, single engine Individual owner
Arizona
Standard 2024-08-29 ValidFAA registration status code V: Valid registration. All codes
N78718 Cessna
172K
Fixed-wing, single engine Aircraft 1821 LLC
North Charleston, South Carolina
Standard 2024-08-29 ValidFAA registration status code V: Valid registration. All codes
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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.