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
N1204P Piper
PA-23-150
Fixed-wing, multi-engine Individual owner
Massachusetts
Standard 2019-03-14 ValidFAA registration status code V: Valid registration. All codes
N2320H Piper
PA-18-150
Fixed-wing, single engine Individual owner
Idaho
Standard 2019-03-14 ValidFAA registration status code V: Valid registration. All codes
N3346E Cessna
172N
Fixed-wing, single engine Individual owner
Indiana
Standard 2019-03-14 ValidFAA registration status code V: Valid registration. All codes
N46484 Cessna
172K
Fixed-wing, single engine Individual owner
Washington
Standard 2019-03-14 ValidFAA registration status code V: Valid registration. All codes
N6998W Piper
PA-28-140
Fixed-wing, single engine Individual owner
California
Standard 2019-03-14 ValidFAA registration status code V: Valid registration. All codes
N1694E Cessna
172N
Fixed-wing, single engine Aerobiz LLC
Lewes, Delaware
Standard 2019-03-13 ValidFAA registration status code V: Valid registration. All codes
N1787T Piper
PA-28-140
Fixed-wing, single engine Individual owner
Texas
Standard 2019-03-13 ValidFAA registration status code V: Valid registration. All codes
N4365R Cessna
172M
Fixed-wing, single engine Csa Aircraft Leasing LLC
Salt Lake City, Utah
Standard 2019-03-13 ValidFAA registration status code V: Valid registration. All codes
N4404A Piper
PA-22-150
Fixed-wing, single engine Co-owned owner
Minnesota
Standard 2019-03-13 ValidFAA registration status code V: Valid registration. All codes
N507LS Stephens A L Dds
PITTS S 1C
Fixed-wing, single engine Lansing Community College
Mason, Michigan
Experimental 2019-03-13 ValidFAA registration status code V: Valid registration. All codes
N54457 Piper
PA-28-140
Fixed-wing, single engine Plane Sailing LLC
Lawrenceville, Georgia
Standard 2019-03-13 ValidFAA registration status code V: Valid registration. All codes
N700 Bellanca
7GCBC
Fixed-wing, single engine Individual owner
West Virginia
Standard 2019-03-13 ValidFAA registration status code V: Valid registration. All codes
N725RJ Cessna
172L
Fixed-wing, single engine Individual owner
Florida
Standard 2019-03-13 ValidFAA registration status code V: Valid registration. All codes
N7350G Cessna
172K
Fixed-wing, single engine Fox Victor Aviation LLC
Newnan, Georgia
Standard 2019-03-13 ValidFAA registration status code V: Valid registration. All codes
N9486K Piper
PA-28-151
Fixed-wing, single engine Aerial Avionics INC
Modesto, California
Standard 2019-03-13 ValidFAA registration status code V: Valid registration. All codes
N43LG Interstate
S-1B1
Fixed-wing, single engine Individual owner
Michigan
Standard 2019-03-12 ValidFAA registration status code V: Valid registration. All codes
N57676 Bellanca
7GCBC
Fixed-wing, single engine Arthur Flying Club INC
Page, North Dakota
Standard 2019-03-12 ValidFAA registration status code V: Valid registration. All codes
N7982K Piper
PA-18A 150
Fixed-wing, single engine Individual owner
New York
Standard 2019-03-12 ValidFAA registration status code V: Valid registration. All codes
N8252E Piper
PA-28-161
Fixed-wing, single engine Miami Flight Training LLC
Miami, Florida
Standard 2019-03-12 ValidFAA registration status code V: Valid registration. All codes
N8469L Cessna
172I
Fixed-wing, single engine Individual owner
Ohio
Standard 2019-03-12 ValidFAA registration status code V: Valid registration. All codes
N12875 Cessna
172M
Fixed-wing, single engine Career Flight Training and Aircraft Rental LLC
Naples, Florida
Standard 2019-03-11 ValidFAA registration status code V: Valid registration. All codes
N3853X Aero Commander
100
Fixed-wing, single engine Co-owned owner
Oregon
Standard 2019-03-11 ValidFAA registration status code V: Valid registration. All codes
N43434 Piper
PA-28-151
Fixed-wing, single engine Bg Partners LLC
El Cerrito, California
Standard 2019-03-11 ValidFAA registration status code V: Valid registration. All codes
N505YR Supalla Raymond J
GLASAIR IIS-FT
Fixed-wing, single engine Individual owner
Idaho
Experimental 2019-03-11 ValidFAA registration status code V: Valid registration. All codes
N63612 Cessna
172P
Fixed-wing, single engine Co-owned owner
Missouri
Standard 2019-03-11 ValidFAA registration status code V: Valid registration. All codes
N6886H Cessna
172M
Fixed-wing, single engine Individual owner
Tennessee
Standard 2019-03-11 ValidFAA registration status code V: Valid registration. All codes
N733GX Cessna
172N
Fixed-wing, single engine Marianas Air Transfer INC
Saipan, Northern Mariana Islands
Standard 2019-03-11 ValidFAA registration status code V: Valid registration. All codes
N73981 Cessna
172N
Fixed-wing, single engine Individual owner
New Hampshire
Standard 2019-03-11 ValidFAA registration status code V: Valid registration. All codes
N2905Z Bellanca
7GCAA
Fixed-wing, single engine Wmh Aviation LLC
Buckley, Washington
Standard 2019-03-09 ValidFAA registration status code V: Valid registration. All codes
N50FA American
AA-5
Fixed-wing, single engine Co-owned owner
Colorado
Standard 2019-03-09 ValidFAA registration status code V: Valid registration. All codes
N512FL Piper
PA-28-140
Fixed-wing, single engine Individual owner
Texas
Standard 2019-03-09 ValidFAA registration status code V: Valid registration. All codes
N6341C Piper
PA-28-161
Fixed-wing, single engine D & D Design & Manufacturing INC
Wheatland, Oklahoma
Standard 2019-03-09 ValidFAA registration status code V: Valid registration. All codes
N6804J Piper
PA-28-151
Fixed-wing, single engine Individual owner
Illinois
Standard 2019-03-09 ValidFAA registration status code V: Valid registration. All codes
N733VG Cessna
172N
Fixed-wing, single engine Individual owner
Texas
Standard 2019-03-09 ValidFAA registration status code V: Valid registration. All codes
N8964D Piper
PA-22-160
Fixed-wing, single engine Co-owned owner
Texas
Standard 2019-03-09 ValidFAA registration status code V: Valid registration. All codes
N969RR Cessna
172P
Fixed-wing, single engine Dodson International Parts INC
Rantoul, Kansas
Standard 2019-03-09 ValidFAA registration status code V: Valid registration. All codes
N2327C Robinson Helicopter
R22 BETA
Helicopter Olson Helicopters LLC
Corpus Christi, Texas
Standard 2019-03-08 ValidFAA registration status code V: Valid registration. All codes
N2967Z Piper
PA-22-150
Fixed-wing, single engine Individual owner
Texas
Standard 2019-03-08 ValidFAA registration status code V: Valid registration. All codes
N4510D Piper
PA-28-161
Fixed-wing, single engine Camwhit Air CORP
Montgomery, New York
Standard 2019-03-08 ValidFAA registration status code V: Valid registration. All codes
N5950W Piper
PA-28-150
Fixed-wing, single engine Withheld at owner's request
Standard 2019-03-08 ValidFAA registration status code V: Valid registration. All codes
N737BU Cessna
172N
Fixed-wing, single engine Aero Equities LLC
Ventura, California
Standard 2019-03-08 ValidFAA registration status code V: Valid registration. All codes
N7524R Piper
PA-28-140
Fixed-wing, single engine Tiny Tin Aviation LLC
Groveland, Florida
Standard 2019-03-08 ValidFAA registration status code V: Valid registration. All codes
N80751 Cessna
172M
Fixed-wing, single engine Individual owner
Texas
Standard 2019-03-08 ValidFAA registration status code V: Valid registration. All codes
N8382L Cessna
172I
Fixed-wing, single engine Individual owner
Puerto Rico
Standard 2019-03-08 ValidFAA registration status code V: Valid registration. All codes
N8391M Robert Andre M
SPORTSMAN 2+2
Fixed-wing, single engine Individual owner
Washington
Experimental 2019-03-08 ValidFAA registration status code V: Valid registration. All codes
N112JM Piper
PA-28-140
Fixed-wing, single engine Individual owner
Texas
Standard 2019-03-07 ValidFAA registration status code V: Valid registration. All codes
N2829T Piper
PA-28-140
Fixed-wing, single engine Individual owner
Texas
Standard 2019-03-07 ValidFAA registration status code V: Valid registration. All codes
N38989 Piper
PA-28-161
Fixed-wing, single engine M5 LLC
Kit Carson, Colorado
Standard 2019-03-07 ValidFAA registration status code V: Valid registration. All codes
N5492H Cessna
172M
Fixed-wing, single engine Acme Aircraft Flying Club LLC
Kalispell, Montana
Experimental 2019-03-07 ValidFAA registration status code V: Valid registration. All codes
N5795U Piper
PA-28-140
Fixed-wing, single engine AG Air Squardron One LLC
Saint Joseph, Illinois
Standard 2019-03-07 ValidFAA registration status code V: Valid registration. All codes
N734PG Cessna
172N
Fixed-wing, single engine American Aircraft Brokers LLC
Aurora, Oregon
Standard 2019-03-07 ValidFAA registration status code V: Valid registration. All codes
N75739 Cessna
172N
Fixed-wing, single engine Entroair LLC
Hilliard, Ohio
Standard 2019-03-07 ValidFAA registration status code V: Valid registration. All codes
N9635H Cessna
172M
Fixed-wing, single engine Arizona Aircraft Leasing LLC
Mesa, Arizona
Standard 2019-03-07 ValidFAA registration status code V: Valid registration. All codes
N9867Y Champion
7GCB
Fixed-wing, single engine Individual owner
Utah
Standard 2019-03-07 ValidFAA registration status code V: Valid registration. All codes
N1986T Paulus D M Sr/Paulus D M Jr
STD HMLTN GLASTAR
Fixed-wing, single engine Individual owner
North Carolina
Experimental 2019-03-06 ValidFAA registration status code V: Valid registration. All codes
N20418 Cessna
172M
Fixed-wing, single engine Individual owner
New York
Standard 2019-03-06 ValidFAA registration status code V: Valid registration. All codes
N265BS Luine Arthur
GLASAIR FT
Fixed-wing, single engine Individual owner
North Carolina
Experimental 2019-03-06 ValidFAA registration status code V: Valid registration. All codes
N5024T Piper
PA-28-140
Fixed-wing, single engine Individual owner
Alabama
Standard 2019-03-06 ValidFAA registration status code V: Valid registration. All codes
N86633 Bellanca
7GCBC
Fixed-wing, single engine Individual owner
Alaska
Standard 2019-03-06 ValidFAA registration status code V: Valid registration. All codes
N918JB Briggs John R
RV-4
Fixed-wing, single engine Individual owner
Georgia
Experimental 2019-03-06 ValidFAA registration status code V: Valid registration. All codes
N98EM Cessna
172I
Fixed-wing, single engine Green Tool & Die CO LLC
Honesdale, Pennsylvania
Standard 2019-03-06 ValidFAA registration status code V: Valid registration. All codes
N118TX Johnston Coyt E
T-18
Fixed-wing, single engine Calandra Joseph D T
Youngsville, Louisiana
Experimental 2019-03-05 ValidFAA registration status code V: Valid registration. All codes
N1737 Cessna
172M
Fixed-wing, single engine High Flight Academy LLC
Allison Park, Pennsylvania
Standard 2019-03-05 ValidFAA registration status code V: Valid registration. All codes
N33727 Piper
PA-28-151
Fixed-wing, single engine Individual owner
Georgia
Standard 2019-03-05 ValidFAA registration status code V: Valid registration. All codes
N38316 Piper
PA-28-161
Fixed-wing, single engine Meriden Aviation Center LLC
Meriden, Connecticut
Standard 2019-03-05 ValidFAA registration status code V: Valid registration. All codes
N4293J Piper
PA-28-140
Fixed-wing, single engine Coastal Virginia Aviation LLC
Chesapeake, Virginia
Standard 2019-03-05 ValidFAA registration status code V: Valid registration. All codes
N6284W Piper
PA-28-140
Fixed-wing, single engine Wd Environmental Services INC
Wauchula, Florida
Standard 2019-03-05 ValidFAA registration status code V: Valid registration. All codes
N737NU Cessna
172N
Fixed-wing, single engine Oracle Aviation LLC
Omaha, Nebraska
Standard 2019-03-05 ValidFAA registration status code V: Valid registration. All codes
N739ZN Cessna
172N
Fixed-wing, single engine Our Jett LLC
Englewood, Colorado
Standard 2019-03-05 ValidFAA registration status code V: Valid registration. All codes
N8148L Piper
PA-28-161
Fixed-wing, single engine Meriden Aviation Center LLC
Meriden, Connecticut
Standard 2019-03-05 ValidFAA registration status code V: Valid registration. All codes
N82368 Piper
PA-18-150
Fixed-wing, single engine Individual owner
Texas
Standard 2019-03-05 ValidFAA registration status code V: Valid registration. All codes
N19886 Cessna
172M
Fixed-wing, single engine Silver Express CO
Miami, Florida
Standard 2019-03-04 ValidFAA registration status code V: Valid registration. All codes
N55146 Cessna
172P
Fixed-wing, single engine Sky High Aviation LLC
Gonzales, Louisiana
Standard 2019-03-04 ValidFAA registration status code V: Valid registration. All codes
N66KP Piper
PA-18-150
Fixed-wing, single engine Individual owner
Texas
Standard 2019-03-04 ValidFAA registration status code V: Valid registration. All codes
N7054B Piper
PA-22-150
Fixed-wing, single engine Individual owner
Georgia
Standard 2019-03-04 ValidFAA registration status code V: Valid registration. All codes
N79169 Cessna
172K
Fixed-wing, single engine Individual owner
Alaska
Standard 2019-03-04 ValidFAA registration status code V: Valid registration. All codes
N8407L Cessna
172I
Fixed-wing, single engine Plainwell Aviation and Stem Academy
Kalamazoo, Michigan
Standard 2019-03-04 ValidFAA registration status code V: Valid registration. All codes
N88384 Bellanca
7GCBC
Fixed-wing, single engine Wingit Holdings LLC
Mannford, Oklahoma
Standard 2019-03-04 ValidFAA registration status code V: Valid registration. All codes
N9650D Piper
PA-22-150
Fixed-wing, single engine Individual owner
Texas
Standard 2019-03-04 ValidFAA registration status code V: Valid registration. All codes
N1822J Piper
PA-28-140
Fixed-wing, single engine Co-owned owner
Pennsylvania
Standard 2019-03-02 ValidFAA registration status code V: Valid registration. All codes
N457DH Bowman Douglas L
RV6-A
Fixed-wing, single engine Richardson Justin
Glasgow, Kentucky
Experimental 2019-03-02 ValidFAA registration status code V: Valid registration. All codes
N5TE Champion
7GCBC
Fixed-wing, single engine Individual owner
Ohio
Standard 2019-03-02 ValidFAA registration status code V: Valid registration. All codes
N734BG Cessna
172N
Fixed-wing, single engine Co-owned owner
Illinois
Standard 2019-03-02 ValidFAA registration status code V: Valid registration. All codes
N79900 Cessna
172K
Fixed-wing, single engine Individual owner
Indiana
Standard 2019-03-02 ValidFAA registration status code V: Valid registration. All codes
N82035 Piper
PA-18-150
Fixed-wing, single engine Individual owner
Alaska
Standard 2019-03-02 ValidFAA registration status code V: Valid registration. All codes
N8993R Champion
7GCB
Fixed-wing, single engine Individual owner
Tennessee
Standard 2019-03-02 ValidFAA registration status code V: Valid registration. All codes
N95327 Piper
PA-28-140
Fixed-wing, single engine Seashell Aviation LLC
Milton, Florida
Standard 2019-03-02 ValidFAA registration status code V: Valid registration. All codes
N172BS Cessna
172L
Fixed-wing, single engine Nothing Wasted LLC
Bunker Hill, Indiana
Standard 2019-03-01 ValidFAA registration status code V: Valid registration. All codes
N20215 Cessna
172M
Fixed-wing, single engine Northeastern Financial LLC
New Gloucester, Maine
Standard 2019-03-01 ValidFAA registration status code V: Valid registration. All codes
N4588X Piper
PA-28-151
Fixed-wing, single engine Individual owner
Texas
Standard 2019-03-01 ValidFAA registration status code V: Valid registration. All codes
N7267G Cessna
172K
Fixed-wing, single engine Individual owner
Missouri
Standard 2019-03-01 ValidFAA registration status code V: Valid registration. All codes
N8896D Piper
PA-18A 150
Fixed-wing, single engine Individual owner
Florida
Standard 2019-03-01 ValidFAA registration status code V: Valid registration. All codes
N2948P Piper
PA-22-150
Fixed-wing, single engine Co-owned owner
Washington
Standard 2019-02-28 ValidFAA registration status code V: Valid registration. All codes
N32501 Piper
PA-28-151
Fixed-wing, single engine Individual owner
Wisconsin
Standard 2019-02-28 ValidFAA registration status code V: Valid registration. All codes
N44LT Turner Edward L
RV-4
Fixed-wing, single engine Individual owner
Washington
Experimental 2019-02-28 ValidFAA registration status code V: Valid registration. All codes
N2424V Piper
PA-28-140
Fixed-wing, single engine Luvsflying Flight Training LLC
Staten Island, New York
Standard 2019-02-27 ValidFAA registration status code V: Valid registration. All codes
N30JA Cessna
172N
Fixed-wing, single engine Jahawk Leasing LLC
Sugar Grove, Illinois
Restricted 2019-02-27 ValidFAA registration status code V: Valid registration. All codes
N31LH Piper
PA-28-161
Fixed-wing, single engine Up and Up Aviation LLC
Magnolia, Texas
Standard 2019-02-27 ValidFAA registration status code V: Valid registration. All codes
N3908Q Cessna
172L
Fixed-wing, single engine Shamrock Flying Service LLC
Denver, Colorado
Standard 2019-02-27 ValidFAA registration status code V: Valid registration. All codes
N61548 Cessna
172M
Fixed-wing, single engine Individual owner
Ohio
Standard 2019-02-27 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.