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
N8621E Piper
PA-28-151
Fixed-wing, single engine Updraft Leasing LLC
Tea, South Dakota
Standard 2017-02-08 ValidFAA registration status code V: Valid registration. All codes
N1682J Piper
PA-28-140
Fixed-wing, single engine Co-owned owner
Wisconsin
Standard 2017-02-07 ValidFAA registration status code V: Valid registration. All codes
N4626R Piper
PA-28-140
Fixed-wing, single engine Individual owner
Ohio
Standard 2017-02-07 ValidFAA registration status code V: Valid registration. All codes
N5232D Cessna
172N
Fixed-wing, single engine Individual owner
Alabama
Standard 2017-02-07 ValidFAA registration status code V: Valid registration. All codes
N78027 Cessna
172K
Fixed-wing, single engine Co-owned owner
California
Standard 2017-02-07 ValidFAA registration status code V: Valid registration. All codes
N92722 Cessna
172M
Fixed-wing, single engine Individual owner
South Carolina
Standard 2017-02-07 ValidFAA registration status code V: Valid registration. All codes
N9643S Champion
7GCBC
Fixed-wing, single engine Individual owner
Alaska
Multiple 2017-02-07 ValidFAA registration status code V: Valid registration. All codes
N323DH Piper
PA-18-150
Fixed-wing, single engine Co-owned owner
Alaska
Standard 2017-02-06 ValidFAA registration status code V: Valid registration. All codes
N3844Q Cessna
172L
Fixed-wing, single engine Smtm Holdings INC
Wilmington, Delaware
Standard 2017-02-06 ValidFAA registration status code V: Valid registration. All codes
N4696F Cessna
172N
Fixed-wing, single engine Individual owner
Puerto Rico
Standard 2017-02-06 ValidFAA registration status code V: Valid registration. All codes
N5181W Piper
PA-28-160
Fixed-wing, single engine Szymanski Janet M
Alanson, Michigan
Standard 2017-02-06 ValidFAA registration status code V: Valid registration. All codes
N5879U Piper
PA-28-140
Fixed-wing, single engine Individual owner
Florida
Standard 2017-02-06 ValidFAA registration status code V: Valid registration. All codes
N64943 Cessna
172P
Fixed-wing, single engine Individual owner
Tennessee
Standard 2017-02-06 ValidFAA registration status code V: Valid registration. All codes
N945GB Beale Geoffrey D
GLASTAR
Fixed-wing, single engine Individual owner
Wisconsin
Experimental 2017-02-06 ValidFAA registration status code V: Valid registration. All codes
N3698Z Piper
PA-18
Fixed-wing, single engine Chippewa Aero LLC
Montevideo, Minnesota
Multiple 2017-02-03 ValidFAA registration status code V: Valid registration. All codes
N4353V Stokes Clive V
VANS RV-4
Fixed-wing, single engine Co-owned owner
Maryland
Experimental 2017-02-03 ValidFAA registration status code V: Valid registration. All codes
N5724F Piper
PA-28-140
Fixed-wing, single engine Individual owner
Texas
Standard 2017-02-03 ValidFAA registration status code V: Valid registration. All codes
N9527W Piper
PA-28-140
Fixed-wing, single engine Individual owner
North Carolina
Standard 2017-02-03 ValidFAA registration status code V: Valid registration. All codes
N265ND Piper
PA-28-161
Fixed-wing, single engine Ari Ben Aviator INC
Fort Pierce, Florida
Standard 2017-02-02 ValidFAA registration status code V: Valid registration. All codes
N3991Z Piper
PA-18-150
Fixed-wing, single engine Fairbanks Investor LLC
Fairbanks, Alaska
Standard 2017-02-02 ValidFAA registration status code V: Valid registration. All codes
N46122 Cessna
172I
Fixed-wing, single engine Co-owned owner
Alaska
Standard 2017-02-02 ValidFAA registration status code V: Valid registration. All codes
N5241D Cessna
172N
Fixed-wing, single engine Sorbi Aviation INC
El Cajon, California
Standard 2017-02-02 ValidFAA registration status code V: Valid registration. All codes
N54233 Piper
PA-18-150
Fixed-wing, single engine Individual owner
Alaska
Standard 2017-02-02 ValidFAA registration status code V: Valid registration. All codes
N61718 Cessna
172M
Fixed-wing, single engine Individual owner
Montana
Standard 2017-02-02 ValidFAA registration status code V: Valid registration. All codes
N642TX Onstott B/Onstott C
VANS RV-6
Fixed-wing, single engine Individual owner
Illinois
Experimental 2017-02-02 ValidFAA registration status code V: Valid registration. All codes
N13786 Cessna
172M
Fixed-wing, single engine Individual owner
Pennsylvania
Standard 2017-02-01 ValidFAA registration status code V: Valid registration. All codes
N277MA American Champion Aircraft
7GCBC
Fixed-wing, single engine Individual owner
Iowa
Standard 2017-02-01 ValidFAA registration status code V: Valid registration. All codes
N30096 Cessna
177
Fixed-wing, single engine Individual owner
Texas
Standard 2017-02-01 ValidFAA registration status code V: Valid registration. All codes
N4083Z Piper
PA-18-150
Fixed-wing, single engine Individual owner
Oregon
Multiple 2017-02-01 ValidFAA registration status code V: Valid registration. All codes
N7246Q Cessna
172L
Fixed-wing, single engine Individual owner
Pennsylvania
Standard 2017-02-01 ValidFAA registration status code V: Valid registration. All codes
N738SP Cessna
172N
Fixed-wing, single engine Our Jett LLC
Englewood, Colorado
Standard 2017-02-01 ValidFAA registration status code V: Valid registration. All codes
N9727P Piper
PA-18-150
Fixed-wing, single engine Individual owner
Alaska
Standard 2017-02-01 ValidFAA registration status code V: Valid registration. All codes
N9822U Grumman American Avn. Corp.
AA-5A
Fixed-wing, single engine Co-owned owner
Indiana
Standard 2017-02-01 ValidFAA registration status code V: Valid registration. All codes
N56987 Piper
PA-28-151
Fixed-wing, single engine Ravotti Air LLC
Leechburg, Pennsylvania
Standard 2017-01-31 ValidFAA registration status code V: Valid registration. All codes
N733TV Cessna
172N
Fixed-wing, single engine Templeton Bros Construction LLC
Livingston, Texas
Standard 2017-01-31 ValidFAA registration status code V: Valid registration. All codes
N12033 Moody Wallace W
RV-6
Fixed-wing, single engine Individual owner
Arizona
Experimental 2017-01-30 ValidFAA registration status code V: Valid registration. All codes
N6156W Piper
PA-28-140
Fixed-wing, single engine Individual owner
South Dakota
Standard 2017-01-30 ValidFAA registration status code V: Valid registration. All codes
N6938J Piper
PA-28-161
Fixed-wing, single engine Individual owner
Tennessee
Standard 2017-01-30 ValidFAA registration status code V: Valid registration. All codes
N9306H Cessna
172M
Fixed-wing, single engine Anycomm CORP
Gold River, California
Standard 2017-01-30 ValidFAA registration status code V: Valid registration. All codes
N41882 Piper
PA-28-151
Fixed-wing, single engine Individual owner
Florida
Standard 2017-01-27 ValidFAA registration status code V: Valid registration. All codes
N4538X Piper
PA-28-140
Fixed-wing, single engine Individual owner
New York
Standard 2017-01-27 ValidFAA registration status code V: Valid registration. All codes
N5096T Piper
PA-28-140
Fixed-wing, single engine Individual owner
Kansas
Standard 2017-01-27 ValidFAA registration status code V: Valid registration. All codes
N57EE Edwards James H
RV-4
Fixed-wing, single engine Co-owned owner
Alaska
Experimental 2017-01-27 ValidFAA registration status code V: Valid registration. All codes
N63663 Cessna
172P
Fixed-wing, single engine Lake Aviation LLC
Murfreesboro, Tennessee
Standard 2017-01-27 ValidFAA registration status code V: Valid registration. All codes
N738TV Cessna
172N
Fixed-wing, single engine Individual owner
Indiana
Standard 2017-01-27 ValidFAA registration status code V: Valid registration. All codes
N8GZ Piper
PA-18-150
Fixed-wing, single engine Individual owner
Alaska
Standard 2017-01-27 ValidFAA registration status code V: Valid registration. All codes
N921JK Kenton John F
THORP T-18C
Fixed-wing, single engine Individual owner
California
Experimental 2017-01-27 ValidFAA registration status code V: Valid registration. All codes
N94FD Ward Daniel W
VANS RV8
Fixed-wing, single engine Individual owner
North Carolina
Experimental 2017-01-27 ValidFAA registration status code V: Valid registration. All codes
N2202P Piper
PA-23
Fixed-wing, multi-engine Macair Aviation LLC
Xenia, Ohio
Standard 2017-01-26 ValidFAA registration status code V: Valid registration. All codes
N309MM Cessna
172M
Fixed-wing, single engine Individual owner
Florida
Standard 2017-01-26 ValidFAA registration status code V: Valid registration. All codes
N734PC Cessna
172N
Fixed-wing, single engine Individual owner
Colorado
Standard 2017-01-26 ValidFAA registration status code V: Valid registration. All codes
N9869U Grumman American Avn. Corp.
AA-5A
Fixed-wing, single engine Jtg Aviation LLC
Las Vegas, Nevada
Standard 2017-01-26 ValidFAA registration status code V: Valid registration. All codes
N194BN Watson Robert Lee
RV-9A
Fixed-wing, single engine Individual owner
California
Experimental 2017-01-25 ValidFAA registration status code V: Valid registration. All codes
N4173Z Piper
PA-18-150
Fixed-wing, single engine Individual owner
Alaska
Standard 2017-01-25 ValidFAA registration status code V: Valid registration. All codes
N461BG American Champion Aircraft
7GCBC
Fixed-wing, single engine Co-owned owner
Texas
Standard 2017-01-25 ValidFAA registration status code V: Valid registration. All codes
N5168H Piper
PA-14
Fixed-wing, single engine Individual owner
Alaska
Standard 2017-01-25 ValidFAA registration status code V: Valid registration. All codes
N54413 Cessna
172P
Fixed-wing, single engine Co-owned owner
Oklahoma
Standard 2017-01-25 ValidFAA registration status code V: Valid registration. All codes
N6143N Beech
19A
Fixed-wing, single engine Individual owner
Hawaii
Standard 2017-01-25 ValidFAA registration status code V: Valid registration. All codes
N6393G Cessna
172N
Fixed-wing, single engine Individual owner
Georgia
Standard 2017-01-25 ValidFAA registration status code V: Valid registration. All codes
N8968D Piper
PA-22-160
Fixed-wing, single engine Individual owner
Florida
Standard 2017-01-25 ValidFAA registration status code V: Valid registration. All codes
N924E Dodge Robert
DODGE RV4-2
Fixed-wing, single engine Individual owner
Florida
Experimental 2017-01-25 ValidFAA registration status code V: Valid registration. All codes
N133F Piper
PA-22-150
Fixed-wing, single engine Individual owner
South Carolina
Standard 2017-01-24 ValidFAA registration status code V: Valid registration. All codes
N33363 Piper
PA-28-151
Fixed-wing, single engine Individual owner
Washington
Standard 2017-01-24 ValidFAA registration status code V: Valid registration. All codes
N5368W Piper
PA-28
Fixed-wing, single engine Individual owner
Texas
Standard 2017-01-24 ValidFAA registration status code V: Valid registration. All codes
N578QW Bentley
C.P.750-BERYL
Fixed-wing, single engine Individual owner
Iowa
Experimental 2017-01-24 ValidFAA registration status code V: Valid registration. All codes
N64299 Cessna
172M
Fixed-wing, single engine Hawk Flying Club
Caledonia, Michigan
Standard 2017-01-24 ValidFAA registration status code V: Valid registration. All codes
N73764 Cessna
172N
Fixed-wing, single engine Individual owner
Washington
Standard 2017-01-24 ValidFAA registration status code V: Valid registration. All codes
N76WP Grumman American Avn. Corp.
AA-5A
Fixed-wing, single engine Individual owner
Florida
Standard 2017-01-24 ValidFAA registration status code V: Valid registration. All codes
N3104 Armstrong
MUSTANG II
Fixed-wing, single engine Individual owner
Tennessee
Experimental 2017-01-23 ValidFAA registration status code V: Valid registration. All codes
N3457P Piper
PA-23-160
Fixed-wing, multi-engine Individual owner
Arizona
Standard 2017-01-23 ValidFAA registration status code V: Valid registration. All codes
N50590 Cessna
172M
Fixed-wing, single engine Usaeroflight LLC
Greenville, South Carolina
Standard 2017-01-23 ValidFAA registration status code V: Valid registration. All codes
N65746 Cessna
172P
Fixed-wing, single engine Individual owner
Florida
Standard 2017-01-23 ValidFAA registration status code V: Valid registration. All codes
N738AJ Cessna
172N
Fixed-wing, single engine Skinner Leasing LLC
Medford, Oregon
Standard 2017-01-23 ValidFAA registration status code V: Valid registration. All codes
N3257B Piper
PA-18-135
Fixed-wing, single engine Van Wagner Aerial Media LLC
Hollywood, Florida
Restricted 2017-01-20 ValidFAA registration status code V: Valid registration. All codes
N33180 Piper
J5A
Fixed-wing, single engine Van Wagner Aerial Media LLC
Hollywood, Florida
Restricted 2017-01-20 ValidFAA registration status code V: Valid registration. All codes
N3666K Piper
J3C-65
Fixed-wing, single engine Van Wagner Aerial Media LLC
Hollywood, Florida
Restricted 2017-01-20 ValidFAA registration status code V: Valid registration. All codes
N41236 Piper
J5A
Fixed-wing, single engine Van Wagner Aerial Media LLC
Hollywood, Florida
Experimental 2017-01-20 ValidFAA registration status code V: Valid registration. All codes
N4388A Piper
PA-18A
Fixed-wing, single engine Van Wagner Aerial Media LLC
Pembroke Pines, Florida
Restricted 2017-01-20 ValidFAA registration status code V: Valid registration. All codes
N6503B Mooney Aircraft Corp.
M20
Fixed-wing, single engine Individual owner
Arkansas
Standard 2017-01-20 ValidFAA registration status code V: Valid registration. All codes
N7227D Piper
PA-22-150
Fixed-wing, single engine Individual owner
Alaska
Standard 2017-01-20 ValidFAA registration status code V: Valid registration. All codes
N8574C Piper
PA-18-135
Fixed-wing, single engine Van Wagner Aerial Media LLC
Hollywood, Florida
Restricted 2017-01-20 ValidFAA registration status code V: Valid registration. All codes
N3294T Cessna
177
Fixed-wing, single engine Individual owner
New Jersey
Standard 2017-01-19 ValidFAA registration status code V: Valid registration. All codes
N382N Grumman American Avn. Corp.
AA-5A
Fixed-wing, single engine Co-owned owner
Michigan
Standard 2017-01-19 ValidFAA registration status code V: Valid registration. All codes
N4151Z Piper
PA-18-150
Fixed-wing, single engine Co-owned owner
Alaska
Standard 2017-01-19 ValidFAA registration status code V: Valid registration. All codes
N53824 Bellanca
7GCBC
Fixed-wing, single engine Co-owned owner
Oklahoma
Standard 2017-01-19 ValidFAA registration status code V: Valid registration. All codes
N738GA Cessna
172N
Fixed-wing, single engine Individual owner
California
Standard 2017-01-19 ValidFAA registration status code V: Valid registration. All codes
N79526 Cessna
172K
Fixed-wing, single engine Individual owner
Minnesota
Standard 2017-01-19 ValidFAA registration status code V: Valid registration. All codes
N84823 Cessna
172K
Fixed-wing, single engine Raw Racing INC
Puyallup, Washington
Standard 2017-01-19 ValidFAA registration status code V: Valid registration. All codes
N19944 Cessna
172M
Fixed-wing, single engine Individual owner
Alaska
Standard 2017-01-18 ValidFAA registration status code V: Valid registration. All codes
N2872Q Cessna
172L
Fixed-wing, single engine Triad Aviation Academy LLC
Greensboro, North Carolina
Standard 2017-01-18 ValidFAA registration status code V: Valid registration. All codes
N29523 Cessna
177
Fixed-wing, single engine Individual owner
California
Standard 2017-01-18 ValidFAA registration status code V: Valid registration. All codes
N30470 Socata
TB 9 TAMPICO
Fixed-wing, single engine Co-owned owner
California
Standard 2017-01-18 ValidFAA registration status code V: Valid registration. All codes
N32HL Lynch Jerry
COZY
Fixed-wing, single engine Individual owner
California
Experimental 2017-01-18 ValidFAA registration status code V: Valid registration. All codes
N103MB Barto Melvin L
RV-6A
Fixed-wing, single engine Individual owner
Colorado
Experimental 2017-01-17 ValidFAA registration status code V: Valid registration. All codes
N1686J Piper
PA-28-140
Fixed-wing, single engine Individual owner
Illinois
Standard 2017-01-17 ValidFAA registration status code V: Valid registration. All codes
N3736P Piper
PA-22-150
Fixed-wing, single engine Individual owner
Alabama
Standard 2017-01-17 ValidFAA registration status code V: Valid registration. All codes
N6424W Piper
PA-28-140
Fixed-wing, single engine Individual owner
Michigan
Standard 2017-01-17 ValidFAA registration status code V: Valid registration. All codes
N9849G Cessna
172L
Fixed-wing, single engine Pray Aviation INC
Augusta, Kansas
Standard 2017-01-17 ValidFAA registration status code V: Valid registration. All codes
N2863Q Cessna
172L
Fixed-wing, single engine Co-owned owner
Indiana
Standard 2017-01-13 ValidFAA registration status code V: Valid registration. All codes
N64KB Piper
PA-23-160
Fixed-wing, multi-engine Individual owner
Oklahoma
Standard 2017-01-13 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 9, 2026. Horsepower and thrust are the FAA's figures for the series, not for a particular aircraft.