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
N20143 Cessna
172M
Fixed-wing, single engine Loomis Aviation LLC
Gahanna, Ohio
Standard 2023-08-11 ValidFAA registration status code V: Valid registration. All codes
N78186 Cessna
172K
Fixed-wing, single engine Individual owner
Washington
Standard 2023-08-11 ValidFAA registration status code V: Valid registration. All codes
N133AJ Cessna
172P
Fixed-wing, single engine American Patrols INC
Midland, Texas
Standard 2023-08-10 ValidFAA registration status code V: Valid registration. All codes
N13543 Cessna
172M
Fixed-wing, single engine Skylink II LLC
Florissant, Missouri
Standard 2023-08-10 ValidFAA registration status code V: Valid registration. All codes
N20079 Cessna
172M
Fixed-wing, single engine Celestial Kinetics Flight Academy LLC
Waupaca, Wisconsin
Standard 2023-08-10 ValidFAA registration status code V: Valid registration. All codes
N2894M Piper
PA-28-161
Fixed-wing, single engine Co-owned owner
California
Standard 2023-08-10 ValidFAA registration status code V: Valid registration. All codes
N4512X Piper
PA-28-140
Fixed-wing, single engine Individual owner
Texas
Standard 2023-08-10 ValidFAA registration status code V: Valid registration. All codes
N4868E Cessna
172N
Fixed-wing, single engine Vero Technical Support INC
Pensacola, Florida
Standard 2023-08-10 ValidFAA registration status code V: Valid registration. All codes
N5119W Piper
PA-28-160
Fixed-wing, single engine Individual owner
California
Standard 2023-08-10 ValidFAA registration status code V: Valid registration. All codes
N5754D Piper
PA-22-150
Fixed-wing, single engine Individual owner
South Dakota
Standard 2023-08-10 ValidFAA registration status code V: Valid registration. All codes
N6374W Piper
PA-28-140
Fixed-wing, single engine Individual owner
Ohio
Standard 2023-08-10 ValidFAA registration status code V: Valid registration. All codes
N7171Q Cessna
172L
Fixed-wing, single engine Individual owner
Washington
Standard 2023-08-10 ValidFAA registration status code V: Valid registration. All codes
N734WZ Cessna
172N
Fixed-wing, single engine Co-owned owner
Washington
Standard 2023-08-10 ValidFAA registration status code V: Valid registration. All codes
N7576F Champion
7GCBC
Fixed-wing, single engine Individual owner
Arizona
Standard 2023-08-10 ValidFAA registration status code V: Valid registration. All codes
N8345R Piper
PA-28-140
Fixed-wing, single engine Klad-Air LLC
Catlett, Virginia
Standard 2023-08-10 ValidFAA registration status code V: Valid registration. All codes
N119JD Piper
PA-28-140
Fixed-wing, single engine USA Wiltshire LLC
Pembroke Pines, Florida
Standard 2023-08-09 ValidFAA registration status code V: Valid registration. All codes
N13036 Cessna
172M
Fixed-wing, single engine Individual owner
Montana
Standard 2023-08-09 ValidFAA registration status code V: Valid registration. All codes
N228RT Thomas James Robert
VANS RV-4
Fixed-wing, single engine Individual owner
Maryland
Experimental 2023-08-09 ValidFAA registration status code V: Valid registration. All codes
N251MA American Champion Aircraft
7GCBC
Fixed-wing, single engine Co-owned owner
Idaho
Standard 2023-08-09 ValidFAA registration status code V: Valid registration. All codes
N2865Z Piper
PA-22-160
Fixed-wing, single engine Individual owner
Alaska
Standard 2023-08-09 ValidFAA registration status code V: Valid registration. All codes
N3200M Piper
PA-12
Fixed-wing, single engine Individual owner
Alaska
Standard 2023-08-09 ValidFAA registration status code V: Valid registration. All codes
N3238Z Piper
PA-22-150
Fixed-wing, single engine Zulu Flight LLC
Washougal, Washington
Standard 2023-08-09 ValidFAA registration status code V: Valid registration. All codes
N56DB Schumacher George H
RV4
Fixed-wing, single engine Individual owner
Ohio
Experimental 2023-08-09 ValidFAA registration status code V: Valid registration. All codes
N5854D Piper
PA-22-150
Fixed-wing, single engine Pro West Air LLC
West Point, Utah
Standard 2023-08-09 ValidFAA registration status code V: Valid registration. All codes
N6694J Piper
PA-28-140
Fixed-wing, single engine Co-owned owner
Texas
Standard 2023-08-09 ValidFAA registration status code V: Valid registration. All codes
N726JH Cessna
172N
Fixed-wing, single engine Clearview Flying Club INC
Westminster, Maryland
Standard 2023-08-09 ValidFAA registration status code V: Valid registration. All codes
N7414R Piper
PA-28-140
Fixed-wing, single engine Vx Aircraft Services LLC
Batesville, Arkansas
Standard 2023-08-09 ValidFAA registration status code V: Valid registration. All codes
N774MG Cessna
172N
Fixed-wing, single engine Ps Aviation INC
Jackson, Minnesota
Standard 2023-08-09 ValidFAA registration status code V: Valid registration. All codes
N8754E Piper
PA-28-140
Fixed-wing, single engine Six Two Seven Aviation LLC
Sardis, Mississippi
Standard 2023-08-09 ValidFAA registration status code V: Valid registration. All codes
N8896 Bellanca
7GCBC
Fixed-wing, single engine Co-owned owner
Alaska
Multiple 2023-08-09 ValidFAA registration status code V: Valid registration. All codes
N9296H Cessna
172M
Fixed-wing, single engine Co-owned owner
Minnesota
Standard 2023-08-09 ValidFAA registration status code V: Valid registration. All codes
N9621D Piper
PA-22-160
Fixed-wing, single engine Limitless Outdoors
Bonners Ferry, Idaho
Standard 2023-08-09 ValidFAA registration status code V: Valid registration. All codes
N172DS Cessna
172M
Fixed-wing, single engine Jb Air Services LLC
Framingham, Massachusetts
Standard 2023-08-08 ValidFAA registration status code V: Valid registration. All codes
N261DM Oelmann Dennis J
COZY
Fixed-wing, single engine Individual owner
Iowa
Experimental 2023-08-08 ValidFAA registration status code V: Valid registration. All codes
N4468R Cessna
172M
Fixed-wing, single engine Individual owner
Michigan
Standard 2023-08-08 ValidFAA registration status code V: Valid registration. All codes
N501ME Thurston
TSC-1A
Fixed-wing, single engine Individual owner
Kentucky
Standard 2023-08-08 ValidFAA registration status code V: Valid registration. All codes
N5025T Piper
PA-28-140
Fixed-wing, single engine Individual owner
New Mexico
Standard 2023-08-08 ValidFAA registration status code V: Valid registration. All codes
N57379 Piper
PA-28-140
Fixed-wing, single engine Co-owned owner
California
Standard 2023-08-08 ValidFAA registration status code V: Valid registration. All codes
N604FT Piper
PA-28-161
Fixed-wing, single engine Florida Institute of Technology
Melbourne, Florida
Standard 2023-08-08 ValidFAA registration status code V: Valid registration. All codes
N82712 Piper
PA-18-150
Fixed-wing, single engine Individual owner
Alaska
Multiple 2023-08-08 ValidFAA registration status code V: Valid registration. All codes
N1531V Cessna
172M
Fixed-wing, single engine Oneonone Flight Training LLC
Hagerstown, Maryland
Standard 2023-08-07 ValidFAA registration status code V: Valid registration. All codes
N26744 Gulfstream American Corp
AA-5A
Fixed-wing, single engine Co-owned owner
Texas
Standard 2023-08-07 ValidFAA registration status code V: Valid registration. All codes
N38986 Piper
PA-28-161
Fixed-wing, single engine Ascend Aviation LLC
Bountiful, Utah
Standard 2023-08-07 ValidFAA registration status code V: Valid registration. All codes
N5692W Piper
PA-28-160
Fixed-wing, single engine Individual owner
Pennsylvania
Standard 2023-08-07 ValidFAA registration status code V: Valid registration. All codes
N623FT Piper
PA-28-161
Fixed-wing, single engine Florida Institute of Technology
Melbourne, Florida
Standard 2023-08-07 ValidFAA registration status code V: Valid registration. All codes
N734MK Cessna
172N
Fixed-wing, single engine Flyby Aviation LLC
Logan, Utah
Standard 2023-08-07 ValidFAA registration status code V: Valid registration. All codes
N78575 Piper
PA-12
Fixed-wing, single engine Individual owner
Alaska
Standard 2023-08-07 ValidFAA registration status code V: Valid registration. All codes
N8773N Piper
PA-28-140
Fixed-wing, single engine Been Flyin LLC
Colchester, Connecticut
Standard 2023-08-07 ValidFAA registration status code V: Valid registration. All codes
N4246Q Cessna
172L
Fixed-wing, single engine Jkg LLC
Murfreesboro, Tennessee
Standard 2023-08-06 ValidFAA registration status code V: Valid registration. All codes
N6605F Piper
PA-28-151
Fixed-wing, single engine Purdue Aviation LLC
West Lafayette, Indiana
Standard 2023-08-06 ValidFAA registration status code V: Valid registration. All codes
N7089R Piper
PA-28-140
Fixed-wing, single engine Flying Tigers Aviation LLC
Mars, Pennsylvania
Standard 2023-08-06 ValidFAA registration status code V: Valid registration. All codes
N733WX Cessna
172N
Fixed-wing, single engine Spartan Marine CO
Capistrano Beach, California
Standard 2023-08-06 ValidFAA registration status code V: Valid registration. All codes
N7961G Cessna
172L
Fixed-wing, single engine Alternate Air INC
Seattle, Washington
Standard 2023-08-06 ValidFAA registration status code V: Valid registration. All codes
N8156T Piper
PA-28-161
Fixed-wing, single engine Individual owner
Florida
Standard 2023-08-06 ValidFAA registration status code V: Valid registration. All codes
N1696J Piper
PA-28-140
Fixed-wing, single engine Co-owned owner
Texas
Standard 2023-08-05 ValidFAA registration status code V: Valid registration. All codes
N3557K Piper
PA-28-140
Fixed-wing, single engine Eastern Aeroworks LLC
Punxsutawney, Pennsylvania
Standard 2023-08-05 ValidFAA registration status code V: Valid registration. All codes
N4300M Piper
PA-12
Fixed-wing, single engine Individual owner
Alaska
Standard 2023-08-05 ValidFAA registration status code V: Valid registration. All codes
N5180R Cessna
172M
Fixed-wing, single engine Individual owner
Montana
Standard 2023-08-05 ValidFAA registration status code V: Valid registration. All codes
N60SS Cessna
172K
Fixed-wing, single engine Individual owner
California
Standard 2023-08-05 ValidFAA registration status code V: Valid registration. All codes
N6797E Cessna
172N
Fixed-wing, single engine Individual owner
Oklahoma
Standard 2023-08-05 ValidFAA registration status code V: Valid registration. All codes
N12698 Cessna
172M
Fixed-wing, single engine American Patrols INC
Midland, Texas
Standard 2023-08-04 ValidFAA registration status code V: Valid registration. All codes
N1790T Piper
PA-28-140
Fixed-wing, single engine Individual owner
Washington
Standard 2023-08-04 ValidFAA registration status code V: Valid registration. All codes
N21754 Cessna
172M
Fixed-wing, single engine Countrywide Flyers LLC
Cape Coral, Florida
Standard 2023-08-04 ValidFAA registration status code V: Valid registration. All codes
N3231Q Piper
PA-28-140
Fixed-wing, single engine Individual owner
Wisconsin
Standard 2023-08-04 ValidFAA registration status code V: Valid registration. All codes
N5951D Piper
PA-22-150
Fixed-wing, single engine Individual owner
Texas
Standard 2023-08-04 ValidFAA registration status code V: Valid registration. All codes
N9690K Piper
PA-28-140
Fixed-wing, single engine Individual owner
California
Standard 2023-08-04 ValidFAA registration status code V: Valid registration. All codes
N1157X Piper
PA-28-140
Fixed-wing, single engine Ascend Aviation LLC
Bountiful, Utah
Standard 2023-08-03 ValidFAA registration status code V: Valid registration. All codes
N1324A Piper
PA-18-125
Fixed-wing, single engine Individual owner
Alaska
Multiple 2023-08-03 ValidFAA registration status code V: Valid registration. All codes
N5298R Cessna
172M
Fixed-wing, single engine Individual owner
Montana
Standard 2023-08-03 ValidFAA registration status code V: Valid registration. All codes
N6261W Piper
PA-28-140
Fixed-wing, single engine Star 1 LLC
Canyon Country, California
Standard 2023-08-03 ValidFAA registration status code V: Valid registration. All codes
N635TB Butler Thomas W
VANS ACFT RV-4
Fixed-wing, single engine Envy Aviation LLC
Tampa, Florida
Experimental 2023-08-03 ValidFAA registration status code V: Valid registration. All codes
N80765 Piper
PA-28-161
Fixed-wing, single engine Individual owner
Texas
Standard 2023-08-03 ValidFAA registration status code V: Valid registration. All codes
N9187S Beech
B19
Fixed-wing, single engine Individual owner
Illinois
Standard 2023-08-03 ValidFAA registration status code V: Valid registration. All codes
N101MS Piper
PA-28-140
Fixed-wing, single engine Individual owner
Maryland
Standard 2023-08-02 ValidFAA registration status code V: Valid registration. All codes
N1649B Piper
PA-22-135
Fixed-wing, single engine Individual owner
Washington
Standard 2023-08-02 ValidFAA registration status code V: Valid registration. All codes
N1705V Cessna
172M
Fixed-wing, single engine Niles Air LLC
Concord, North Carolina
Standard 2023-08-02 ValidFAA registration status code V: Valid registration. All codes
N313AC Piper
PA-28-161
Fixed-wing, single engine Aero Craft of Bloomington LLC
Bloomington, Illinois
Standard 2023-08-02 ValidFAA registration status code V: Valid registration. All codes
N4034P Piper
PA-23-160
Fixed-wing, multi-engine Co-owned owner
Maryland
Standard 2023-08-02 ValidFAA registration status code V: Valid registration. All codes
N4121P Piper
PA-23-160
Fixed-wing, multi-engine Riggin Flight Service INC
Madison, South Dakota
Standard 2023-08-02 ValidFAA registration status code V: Valid registration. All codes
N4150Z Piper
PA-18-150
Fixed-wing, single engine Dalks Leasing INC
Wilmington, Delaware
Standard 2023-08-02 ValidFAA registration status code V: Valid registration. All codes
N4632V Varga Aircraft Corp.
2150A
Fixed-wing, single engine Individual owner
Texas
Standard 2023-08-02 ValidFAA registration status code V: Valid registration. All codes
N5483L Grumman American Avn. Corp.
AA-5
Fixed-wing, single engine Individual owner
California
Standard 2023-08-02 ValidFAA registration status code V: Valid registration. All codes
N55422 Cessna
172P
Fixed-wing, single engine Individual owner
New York
Standard 2023-08-02 ValidFAA registration status code V: Valid registration. All codes
N6924H Cessna
172M
Fixed-wing, single engine Jeea Aviation LLC
Tyler, Texas
Standard 2023-08-02 ValidFAA registration status code V: Valid registration. All codes
N734PH Cessna
172N
Fixed-wing, single engine Tiger Bait Aviation LLC
Gulfport, Mississippi
Standard 2023-08-02 ValidFAA registration status code V: Valid registration. All codes
N78CW Piper
PA-12
Fixed-wing, single engine Individual owner
Alaska
Standard 2023-08-02 ValidFAA registration status code V: Valid registration. All codes
N7921G Cessna
172L
Fixed-wing, single engine Triad Aviation Academy LLC
Greensboro, North Carolina
Standard 2023-08-02 ValidFAA registration status code V: Valid registration. All codes
N128RS Smith Walter Reed Iii
RV-6
Fixed-wing, single engine Gwizair LLC
Lewes, Delaware
Experimental 2023-08-01 ValidFAA registration status code V: Valid registration. All codes
N77JG Piper
PA-18-150
Fixed-wing, single engine Goon Aviation LLC
Kalispell, Montana
Standard 2023-08-01 ValidFAA registration status code V: Valid registration. All codes
N8026Q Young Terry
RV-6
Fixed-wing, single engine International Fun Place Hangar 32 LLC
Laughlin, Nevada
Experimental 2023-08-01 ValidFAA registration status code V: Valid registration. All codes
N84801 Cessna
172K
Fixed-wing, single engine Individual owner
Maryland
Standard 2023-08-01 ValidFAA registration status code V: Valid registration. All codes
N26278 Grumman American Avn. Corp.
AA-5A
Fixed-wing, single engine Bal-Air LLC
Boca Raton, Florida
Standard 2023-07-31 ValidFAA registration status code V: Valid registration. All codes
N2962E Cessna
172N
Fixed-wing, single engine Paulisue Aviation LLC
East Saint Louis, Illinois
Standard 2023-07-31 ValidFAA registration status code V: Valid registration. All codes
N4135Y Bellanca
7GCBC
Fixed-wing, single engine Individual owner
New Hampshire
Standard 2023-07-31 ValidFAA registration status code V: Valid registration. All codes
N450PM Piper
PA-22-160
Fixed-wing, single engine Individual owner
Alaska
Standard 2023-07-31 ValidFAA registration status code V: Valid registration. All codes
N5420L Grumman American Avn. Corp.
AA-5
Fixed-wing, single engine Individual owner
Texas
Standard 2023-07-31 ValidFAA registration status code V: Valid registration. All codes
N6265D Cessna
172N
Fixed-wing, single engine Commander Funk LLP
Portland, Oregon
Standard 2023-07-31 ValidFAA registration status code V: Valid registration. All codes
N8238N Piper
PA-28-140
Fixed-wing, single engine Silver Hawk Aviation LLC
Panora, Iowa
Standard 2023-07-31 ValidFAA registration status code V: Valid registration. All codes
N911CT Gulfstream American Corp
AA-5A
Fixed-wing, single engine Mcallen Aviation LLC
Mansfield, Louisiana
Standard 2023-07-31 ValidFAA registration status code V: Valid registration. All codes
N111HM Bellanca
7GCBC
Fixed-wing, single engine Sciara Flying Service LLC
Eudora, Arkansas
Standard 2023-07-29 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.