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
N35732 Piper
PA-28-161
Fixed-wing, single engine Individual owner
Tennessee
Standard 2021-03-09 ValidFAA registration status code V: Valid registration. All codes
N36583 Piper
PA-28-161
Fixed-wing, single engine Trident Aircraft INC
Easton, Maryland
Standard 2021-03-09 ValidFAA registration status code V: Valid registration. All codes
N4629R Piper
PA-28-140
Fixed-wing, single engine Individual owner
Pennsylvania
Standard 2021-03-09 ValidFAA registration status code V: Valid registration. All codes
N47882 Piper
PA-28-161
Fixed-wing, single engine Trident Aircraft INC
Easton, Maryland
Standard 2021-03-09 ValidFAA registration status code V: Valid registration. All codes
N6667F Piper
PA-28-151
Fixed-wing, single engine Trident Aircraft INC
Easton, Maryland
Standard 2021-03-09 ValidFAA registration status code V: Valid registration. All codes
N6792B Piper
PA-18A
Fixed-wing, single engine Individual owner
North Dakota
Multiple 2021-03-09 ValidFAA registration status code V: Valid registration. All codes
N8345Z Piper
PA-28-161
Fixed-wing, single engine Trident Aircraft INC
Easton, Maryland
Standard 2021-03-09 ValidFAA registration status code V: Valid registration. All codes
N8394D Piper
PA-28-161
Fixed-wing, single engine Trident Aircraft INC
Easton, Maryland
Standard 2021-03-09 ValidFAA registration status code V: Valid registration. All codes
N9827G Cessna
172L
Fixed-wing, single engine Individual owner
California
Standard 2021-03-09 ValidFAA registration status code V: Valid registration. All codes
N179DC Fereira Donald
RV-4
Fixed-wing, single engine Individual owner
Texas
Experimental 2021-03-08 ValidFAA registration status code V: Valid registration. All codes
N4953F Piper
PA-28-140
Fixed-wing, single engine Co-owned owner
North Carolina
Standard 2021-03-08 ValidFAA registration status code V: Valid registration. All codes
N7607E Cessna
172N
Fixed-wing, single engine Powerbelt LLC
Glendale, California
Standard 2021-03-08 ValidFAA registration status code V: Valid registration. All codes
N83278 Piper
PA-18-150
Fixed-wing, single engine Individual owner
Alaska
Standard 2021-03-08 ValidFAA registration status code V: Valid registration. All codes
N12DS Carr Bryan
RV4
Fixed-wing, single engine Individual owner
Texas
Experimental 2021-03-06 ValidFAA registration status code V: Valid registration. All codes
N249M Harle Harold L
RV-6
Fixed-wing, single engine Individual owner
Illinois
Experimental 2021-03-06 ValidFAA registration status code V: Valid registration. All codes
N320TH Jelomono Ralph J
LANCAIR 320 FB
Fixed-wing, single engine N63E LLC
Fallon, Nevada
Experimental 2021-03-06 ValidFAA registration status code V: Valid registration. All codes
N4376G Jackson Joseph R
WAG AERO 2+2
Fixed-wing, single engine Individual owner
Maine
Experimental 2021-03-06 ValidFAA registration status code V: Valid registration. All codes
N5638U Piper
PA-28-140
Fixed-wing, single engine Lig Tyl LLC
Akron, New York
Standard 2021-03-06 ValidFAA registration status code V: Valid registration. All codes
N679CM Peterson Clifford E
RV-6
Fixed-wing, single engine Individual owner
North Carolina
Experimental 2021-03-06 ValidFAA registration status code V: Valid registration. All codes
N819 Piper
PA-18-150
Fixed-wing, single engine Co-owned owner
Wyoming
Standard 2021-03-06 ValidFAA registration status code V: Valid registration. All codes
N88405 Bellanca
7GCBC
Fixed-wing, single engine Individual owner
Arizona
Standard 2021-03-06 ValidFAA registration status code V: Valid registration. All codes
N9534L Grumman American Avn. Corp.
AA-5
Fixed-wing, single engine Co-owned owner
New Jersey
Standard 2021-03-06 ValidFAA registration status code V: Valid registration. All codes
N47905 Piper
PA-28-161
Fixed-wing, single engine Hanson Larry A
Starkville, Mississippi
Standard 2021-03-05 ValidFAA registration status code V: Valid registration. All codes
N51238 Cessna
172P
Fixed-wing, single engine Flying G Aviation INC
Drayton, North Dakota
Standard 2021-03-05 ValidFAA registration status code V: Valid registration. All codes
N739TR Cessna
172N
Fixed-wing, single engine Jeff Air Pilot Services LLC
Shelbyville, Indiana
Standard 2021-03-05 ValidFAA registration status code V: Valid registration. All codes
N984CT Noble Morinaka
VANS RV3
Fixed-wing, single engine Individual owner
Oregon
Experimental 2021-03-05 ValidFAA registration status code V: Valid registration. All codes
N173PK Cessna
172K
Fixed-wing, single engine Trc-4K Investments LLC
Southlake, Texas
Standard 2021-03-04 ValidFAA registration status code V: Valid registration. All codes
N46230 Cessna
172I
Fixed-wing, single engine Co-owned owner
Georgia
Standard 2021-03-04 ValidFAA registration status code V: Valid registration. All codes
N73146 Cessna
172M
Fixed-wing, single engine Oregon State Flying Club INC
Corvallis, Oregon
Standard 2021-03-04 ValidFAA registration status code V: Valid registration. All codes
N8201N Piper
PA-28-140
Fixed-wing, single engine Individual owner
Pennsylvania
Standard 2021-03-04 ValidFAA registration status code V: Valid registration. All codes
N8973V Cessna
172M
Fixed-wing, single engine Ocean Flyers LLC
Chatham, New Jersey
Standard 2021-03-04 ValidFAA registration status code V: Valid registration. All codes
N41523 Piper
PA-28-151
Fixed-wing, single engine Individual owner
North Carolina
Standard 2021-03-03 ValidFAA registration status code V: Valid registration. All codes
N44761 Piper
PA-28-151
Fixed-wing, single engine Individual owner
Pennsylvania
Standard 2021-03-03 ValidFAA registration status code V: Valid registration. All codes
N55246 Cessna
172P
Fixed-wing, single engine Kadena Aero Club
Apo, AP
Standard 2021-03-03 ValidFAA registration status code V: Valid registration. All codes
N1635J Piper
PA-28-140
Fixed-wing, single engine Dalsco INC
Dover, Delaware
Standard 2021-03-02 ValidFAA registration status code V: Valid registration. All codes
N1777C Piper
PA-28-140
Fixed-wing, single engine Individual owner
Kansas
Standard 2021-03-02 ValidFAA registration status code V: Valid registration. All codes
N2823E Cessna
172N
Fixed-wing, single engine 2Lyons Enterprises LLC
Westlake, Florida
Standard 2021-03-02 ValidFAA registration status code V: Valid registration. All codes
N4243Z Piper
PA-18-150
Fixed-wing, single engine Individual owner
Oklahoma
Multiple 2021-03-02 ValidFAA registration status code V: Valid registration. All codes
N8408L Piper
PA-28-161
Fixed-wing, single engine Macair Aviation LLC
Xenia, Ohio
Standard 2021-03-02 ValidFAA registration status code V: Valid registration. All codes
N8851N Piper
PA-28-140
Fixed-wing, single engine Individual owner
Tennessee
Standard 2021-03-02 ValidFAA registration status code V: Valid registration. All codes
N5736W Piper
PA-28-150
Fixed-wing, single engine Time Flyer LLC
Kalispell, Montana
Standard 2021-03-01 ValidFAA registration status code V: Valid registration. All codes
N693W Benell Ronald E
HATZ CB-1 CLASSIC
Fixed-wing, single engine Miller Steve L
Naperville, Illinois
Experimental 2021-03-01 ValidFAA registration status code V: Valid registration. All codes
N12506 Cessna
172M
Fixed-wing, single engine Txt Aviation LLC
Deland, Florida
Standard 2021-02-27 ValidFAA registration status code V: Valid registration. All codes
N2394Z Beech
23
Fixed-wing, single engine Blue Max Aero Club LTD
Onalaska, Wisconsin
Standard 2021-02-27 ValidFAA registration status code V: Valid registration. All codes
N2909Q Piper
PA-28-161
Fixed-wing, single engine Individual owner
Wyoming
Standard 2021-02-27 ValidFAA registration status code V: Valid registration. All codes
N3692Z Piper
PA-18-150
Fixed-wing, single engine
Multiple 2021-02-27 ValidFAA registration status code V: Valid registration. All codes
N5211W Piper
PA-28-160
Fixed-wing, single engine Individual owner
Georgia
Standard 2021-02-27 ValidFAA registration status code V: Valid registration. All codes
N6914W Piper
PA-28-140
Fixed-wing, single engine Individual owner
Ohio
Standard 2021-02-27 ValidFAA registration status code V: Valid registration. All codes
N2007P Piper
PA-23
Fixed-wing, multi-engine 2007 Papa LLC
Fayetteville, Georgia
Standard 2021-02-25 ValidFAA registration status code V: Valid registration. All codes
N399BC American Champion Aircraft
7GCAA
Fixed-wing, single engine Paradox Aviation LLC
Whiting, Iowa
Standard 2021-02-25 ValidFAA registration status code V: Valid registration. All codes
N4044D Robinson Helicopter
R22 BETA
Helicopter Parker Helicopter LLC
Watsonville, California
Standard 2021-02-25 ValidFAA registration status code V: Valid registration. All codes
N6323R Piper
PA-28-140
Fixed-wing, single engine Individual owner
Montana
Standard 2021-02-25 ValidFAA registration status code V: Valid registration. All codes
N8218N Piper
PA-28-140
Fixed-wing, single engine Individual owner
California
Standard 2021-02-25 ValidFAA registration status code V: Valid registration. All codes
N29367 Cessna
177
Fixed-wing, single engine Co-owned owner
Indiana
Standard 2021-02-24 ValidFAA registration status code V: Valid registration. All codes
N297DS Bernauer/Cannon
RV-6
Fixed-wing, single engine Individual owner
New Mexico
Experimental 2021-02-24 ValidFAA registration status code V: Valid registration. All codes
N56714 Piper
PA-28-140
Fixed-wing, single engine Co-owned owner
Kansas
Standard 2021-02-24 ValidFAA registration status code V: Valid registration. All codes
N5ZU Piper
PA-18-150
Fixed-wing, single engine Withheld at owner's request
Standard 2021-02-24 ValidFAA registration status code V: Valid registration. All codes
N6192J Piper
PA-28-140
Fixed-wing, single engine First Flight CORP
San Diego, California
Standard 2021-02-24 ValidFAA registration status code V: Valid registration. All codes
N7265F Piper
PA-28-140
Fixed-wing, single engine Shouling & Philip Enterprise
Lancaster, California
Standard 2021-02-24 ValidFAA registration status code V: Valid registration. All codes
N734NS Cessna
172N
Fixed-wing, single engine Individual owner
Florida
Standard 2021-02-24 ValidFAA registration status code V: Valid registration. All codes
N75955 Cessna
172N
Fixed-wing, single engine Individual owner
Montana
Standard 2021-02-24 ValidFAA registration status code V: Valid registration. All codes
N8594E Champion
7FC
Fixed-wing, single engine Individual owner
Kentucky
Experimental 2021-02-24 ValidFAA registration status code V: Valid registration. All codes
N9102D Piper
PA-18A 150
Fixed-wing, single engine Individual owner
Alaska
Multiple 2021-02-24 ValidFAA registration status code V: Valid registration. All codes
N3422T Cessna
177
Fixed-wing, single engine Individual owner
California
Standard 2021-02-23 ValidFAA registration status code V: Valid registration. All codes
N5787W Piper
PA-28-150
Fixed-wing, single engine Individual owner
North Carolina
Standard 2021-02-23 ValidFAA registration status code V: Valid registration. All codes
N6852B Piper
PA-22-150
Fixed-wing, single engine Individual owner
Missouri
Standard 2021-02-23 ValidFAA registration status code V: Valid registration. All codes
N7607G Cessna
172L
Fixed-wing, single engine Individual owner
California
Standard 2021-02-23 ValidFAA registration status code V: Valid registration. All codes
N4529R Piper
PA-28-140
Fixed-wing, single engine Individual owner
Nevada
Standard 2021-02-22 ValidFAA registration status code V: Valid registration. All codes
N6242J Piper
PA-28-140
Fixed-wing, single engine East Coast Autoline LLC
Whitehall, Pennsylvania
Standard 2021-02-22 ValidFAA registration status code V: Valid registration. All codes
N2829E Cessna
172N
Fixed-wing, single engine Everts Air Service INC
Sarasota, Florida
Standard 2021-02-20 ValidFAA registration status code V: Valid registration. All codes
N35626 Cessna
172I
Fixed-wing, single engine Individual owner
Texas
Standard 2021-02-20 ValidFAA registration status code V: Valid registration. All codes
N4774E Cessna
172N
Fixed-wing, single engine Individual owner
New York
Standard 2021-02-20 ValidFAA registration status code V: Valid registration. All codes
N6916H Cessna
172M
Fixed-wing, single engine Fms Air LLC
Leesville, Louisiana
Standard 2021-02-20 ValidFAA registration status code V: Valid registration. All codes
N76KD Carlson David E
AERO GARE SEA HAWK
Fixed-wing, single engine Individual owner
Alaska
Experimental 2021-02-20 ValidFAA registration status code V: Valid registration. All codes
N80829 Globe
GC-1B
Fixed-wing, single engine Individual owner
Connecticut
Standard 2021-02-20 ValidFAA registration status code V: Valid registration. All codes
N8125Y Piper
PA-28-161
Fixed-wing, single engine Individual owner
Indiana
Standard 2021-02-20 ValidFAA registration status code V: Valid registration. All codes
N3656P Piper
PA-22-150
Fixed-wing, single engine Individual owner
Alaska
Standard 2021-02-19 ValidFAA registration status code V: Valid registration. All codes
N4246J Piper
PA-28-140
Fixed-wing, single engine Bk Media LLC
Hilo, Hawaii
Standard 2021-02-19 ValidFAA registration status code V: Valid registration. All codes
N4413S Cessna
172K
Fixed-wing, single engine Birmingham Flight Center LLC
Birmingham, Alabama
Standard 2021-02-19 ValidFAA registration status code V: Valid registration. All codes
N600AA Piper
PA-28-140
Fixed-wing, single engine Co-owned owner
Illinois
Standard 2021-02-18 ValidFAA registration status code V: Valid registration. All codes
N7427R Piper
PA-28-140
Fixed-wing, single engine Individual owner
New Hampshire
Standard 2021-02-18 ValidFAA registration status code V: Valid registration. All codes
N83577 Piper
PA-18-150
Fixed-wing, single engine Individual owner
North Dakota
Standard 2021-02-18 ValidFAA registration status code V: Valid registration. All codes
N14AX Alon
X-A4
Fixed-wing, single engine Individual owner
Iowa
Experimental 2021-02-17 ValidFAA registration status code V: Valid registration. All codes
N2829X Cessna
177
Fixed-wing, single engine Individual owner
Iowa
Standard 2021-02-17 ValidFAA registration status code V: Valid registration. All codes
N5764D Piper
PA-18-150
Fixed-wing, single engine Individual owner
Alaska
Multiple 2021-02-17 ValidFAA registration status code V: Valid registration. All codes
N86483 Piper
PA-22-160
Fixed-wing, single engine Eaa Aviation Foundation INC
Oshkosh, Wisconsin
Standard 2021-02-17 ValidFAA registration status code V: Valid registration. All codes
N8930D Piper
PA-22-160
Fixed-wing, single engine Individual owner
Texas
Experimental 2021-02-17 ValidFAA registration status code V: Valid registration. All codes
N9867D Piper
PA-18A 150
Fixed-wing, single engine Individual owner
Montana
Multiple 2021-02-17 ValidFAA registration status code V: Valid registration. All codes
N308SU Cessna
172P
Fixed-wing, single engine Hagele Aviation LLC
Hillsboro, Oregon
Standard 2021-02-16 ValidFAA registration status code V: Valid registration. All codes
N3505M Piper
PA-12
Fixed-wing, single engine Mountain Green Aviation LLC
Morgan, Utah
Standard 2021-02-16 ValidFAA registration status code V: Valid registration. All codes
N6101W Piper
PA-28-140
Fixed-wing, single engine Co-owned owner
Kansas
Standard 2021-02-16 ValidFAA registration status code V: Valid registration. All codes
N3996K Piper
PA-28-140
Fixed-wing, single engine Individual owner
Texas
Standard 2021-02-13 ValidFAA registration status code V: Valid registration. All codes
N50678 Bellanca
7GCBC
Fixed-wing, single engine Co-owned owner
Wyoming
Standard 2021-02-13 ValidFAA registration status code V: Valid registration. All codes
N5217D Cessna
172N
Fixed-wing, single engine Optima Aviation LLC DBA
Lewisville, Texas
Standard 2021-02-13 ValidFAA registration status code V: Valid registration. All codes
N7156Q Cessna
172L
Fixed-wing, single engine American Patrols INC
Midland, Texas
Standard 2021-02-13 ValidFAA registration status code V: Valid registration. All codes
N5810U Piper
PA-28-140
Fixed-wing, single engine Individual owner
Illinois
Standard 2021-02-12 ValidFAA registration status code V: Valid registration. All codes
N739TF Cessna
172N
Fixed-wing, single engine Jld Resources Management LLC
Helena, Montana
Standard 2021-02-12 ValidFAA registration status code V: Valid registration. All codes
N172PT Cessna
172N
Fixed-wing, single engine Spanaflight LLC
Puyallup, Washington
Multiple 2021-02-11 ValidFAA registration status code V: Valid registration. All codes
N2288P Piper
PA-23
Fixed-wing, multi-engine Individual owner
Texas
Standard 2021-02-11 ValidFAA registration status code V: Valid registration. All codes
N30189 Cessna
177
Fixed-wing, single engine Onguard Aviation LLC
Cottonwood Falls, Kansas
Standard 2021-02-11 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.