The U.S. aircraft register, updated daily
Engines · piston (reciprocating) · data as of October 7, 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

These connections as data: /graph/engine/lycoming-o-320-series.json · about the eFlight graph.

Aircraft newest certificates first · 27,315

Tail no.Maker and modelGroupOwner and baseCertificateRegisteredStatus
N8339C Piper
PA-28-151
Fixed-wing, single engine Individual owner
Missouri
Standard 2025-07-30 ValidFAA registration status code V: Valid registration. All codes
N8613V Bellanca
7GCBC
Fixed-wing, single engine Individual owner
Alaska
Standard 2025-07-30 ValidFAA registration status code V: Valid registration. All codes
N88412 Bellanca
7GCBC
Fixed-wing, single engine Individual owner
Alaska
Standard 2025-07-30 ValidFAA registration status code V: Valid registration. All codes
N9804W Piper
PA-28-140
Fixed-wing, single engine Co-owned owner
Florida
Standard 2025-07-30 ValidFAA registration status code V: Valid registration. All codes
N11721 Bellanca
7KCAB
Fixed-wing, single engine Individual owner
New York
Restricted 2025-07-29 ValidFAA registration status code V: Valid registration. All codes
N13TP Cessna
172M
Fixed-wing, single engine Lehman Aviation LLC
Remington, Indiana
Standard 2025-07-29 ValidFAA registration status code V: Valid registration. All codes
N1844J Piper
PA-28-140
Fixed-wing, single engine Co-owned owner
Washington
Standard 2025-07-29 ValidFAA registration status code V: Valid registration. All codes
N225CK Omf
OMF-100-160
Fixed-wing, single engine G-Force Aviation LLC
Surprise, Arizona
Standard 2025-07-29 ValidFAA registration status code V: Valid registration. All codes
N26KS Schreiber Kenneth W
VANS RV6A
Fixed-wing, single engine Mrd Aero LLC
Manheim, Pennsylvania
Experimental 2025-07-29 ValidFAA registration status code V: Valid registration. All codes
N320SH Piper
PA-18A
Fixed-wing, single engine Co-owned owner
Alaska
Standard 2025-07-29 ValidFAA registration status code V: Valid registration. All codes
N32790 Piper
PA-28-151
Fixed-wing, single engine N32790 LLC
Avilla, Indiana
Standard 2025-07-29 ValidFAA registration status code V: Valid registration. All codes
N3773X Aero Commander
100
Fixed-wing, single engine Ferris David L
Kerrville, Texas
Standard 2025-07-29 ValidFAA registration status code V: Valid registration. All codes
N3912X Piper
PA-28-140
Fixed-wing, single engine N3912X Holdings LLC
Sarasota, Florida
Standard 2025-07-29 ValidFAA registration status code V: Valid registration. All codes
N3935K Piper
PA-28-140
Fixed-wing, single engine Individual owner
Wisconsin
Standard 2025-07-29 ValidFAA registration status code V: Valid registration. All codes
N3971P Piper
PA-18A 150
Fixed-wing, single engine Individual owner
Alaska
Standard 2025-07-29 ValidFAA registration status code V: Valid registration. All codes
N4356J Piper
PA-28-140
Fixed-wing, single engine Co-owned owner
Idaho
Standard 2025-07-29 ValidFAA registration status code V: Valid registration. All codes
N5933D Piper
PA-22-150
Fixed-wing, single engine Co-owned owner
North Dakota
Standard 2025-07-29 ValidFAA registration status code V: Valid registration. All codes
N733XK Cessna
172N
Fixed-wing, single engine Co-owned owner
Massachusetts
Multiple 2025-07-29 ValidFAA registration status code V: Valid registration. All codes
N7471R Piper
PA-28-140
Fixed-wing, single engine Individual owner
Texas
Standard 2025-07-29 ValidFAA registration status code V: Valid registration. All codes
N7508R Piper
PA-28-140
Fixed-wing, single engine Individual owner
Kansas
Standard 2025-07-29 ValidFAA registration status code V: Valid registration. All codes
N8775N Piper
PA-28-140
Fixed-wing, single engine Individual owner
Texas
Standard 2025-07-29 ValidFAA registration status code V: Valid registration. All codes
N140JF Piper
PA-28-140
Fixed-wing, single engine Meriden Aviation Center LLC
Meriden, Connecticut
Standard 2025-07-28 ValidFAA registration status code V: Valid registration. All codes
N3905Q Cessna
172L
Fixed-wing, single engine H&H Cloudbase Aviation LLC
Carlsbad, California
Standard 2025-07-28 ValidFAA registration status code V: Valid registration. All codes
N5825T Piper
PA-28-150
Fixed-wing, single engine Individual owner
New Mexico
Standard 2025-07-28 ValidFAA registration status code V: Valid registration. All codes
N61567 Cessna
172M
Fixed-wing, single engine Enzyme Holdings LLC
Wilmington, Delaware
Standard 2025-07-28 ValidFAA registration status code V: Valid registration. All codes
N7290J Piper
PA-28-140
Fixed-wing, single engine Individual owner
California
Standard 2025-07-28 ValidFAA registration status code V: Valid registration. All codes
N78349 Cessna
172K
Fixed-wing, single engine Individual owner
Georgia
Standard 2025-07-28 ValidFAA registration status code V: Valid registration. All codes
N2368Z Beech
23
Fixed-wing, single engine Jpk Aviation LLC
Bowling Green, Kentucky
Standard 2025-07-26 ValidFAA registration status code V: Valid registration. All codes
N5445W Piper
PA-28-160
Fixed-wing, single engine Individual owner
Wisconsin
Standard 2025-07-25 ValidFAA registration status code V: Valid registration. All codes
N6049D Piper
PA-22-150
Fixed-wing, single engine Individual owner
Alaska
Standard 2025-07-25 ValidFAA registration status code V: Valid registration. All codes
N735FL Piper
PA-28-140
Fixed-wing, single engine International Air Services INC Trustee
Carson City, Nevada
Standard 2025-07-25 ValidFAA registration status code V: Valid registration. All codes
N737XS Cessna
172N
Fixed-wing, single engine University of Maryland Eastern Shore
Princess Anne, Maryland
Standard 2025-07-25 ValidFAA registration status code V: Valid registration. All codes
N94VF Frazier Vincent A
FRAZIER RV-4
Fixed-wing, single engine Individual owner
Mississippi
Experimental 2025-07-25 ValidFAA registration status code V: Valid registration. All codes
N99697 Cessna
172P
Fixed-wing, single engine Sky High Leasing Services LLC
Lakeland, Florida
Standard 2025-07-25 ValidFAA registration status code V: Valid registration. All codes
N13HR Robinson Helicopter
R22 ALPHA
Helicopter South Florida Helicopters INC
Indiantown, Florida
Standard 2025-07-24 ValidFAA registration status code V: Valid registration. All codes
N23859 Beech
B19
Fixed-wing, single engine Individual owner
Washington
Standard 2025-07-24 ValidFAA registration status code V: Valid registration. All codes
N2585S Piper
PA-18-150
Fixed-wing, single engine Individual owner
Florida
Standard 2025-07-24 ValidFAA registration status code V: Valid registration. All codes
N40903 Piper
PA-28-151
Fixed-wing, single engine Boyer Aviation LLC
Kiel, Wisconsin
Standard 2025-07-24 ValidFAA registration status code V: Valid registration. All codes
N4379W Robinson Helicopter
R22
Helicopter South Florida Helicopters INC
Indiantown, Florida
Standard 2025-07-24 ValidFAA registration status code V: Valid registration. All codes
N7132Q Cessna
172L
Fixed-wing, single engine Aero Quest LLC
Olive Branch, Mississippi
Standard 2025-07-24 ValidFAA registration status code V: Valid registration. All codes
N7366D Cessna
172N
Fixed-wing, single engine Mh Aviation INC
Lancaster, California
Standard 2025-07-24 ValidFAA registration status code V: Valid registration. All codes
N80025 Robinson Helicopter
R22 BETA
Helicopter South Florida Helicopters INC
Indiantown, Florida
Standard 2025-07-24 ValidFAA registration status code V: Valid registration. All codes
N9642S Champion
7GCBC
Fixed-wing, single engine Individual owner
Texas
Standard 2025-07-24 ValidFAA registration status code V: Valid registration. All codes
N14033 Piper
PA-28-140
Fixed-wing, single engine Nomadic Flight Training LLC
New Castle, Delaware
Standard 2025-07-23 ValidFAA registration status code V: Valid registration. All codes
N3038L Piper
PA-28-161
Fixed-wing, single engine Region Flyers LLC
Valparaiso, Indiana
Standard 2025-07-23 ValidFAA registration status code V: Valid registration. All codes
N4323Q Cessna
172L
Fixed-wing, single engine Wausau Flying Service INC
Wausau, Wisconsin
Standard 2025-07-23 ValidFAA registration status code V: Valid registration. All codes
N4521R Piper
PA-28-140
Fixed-wing, single engine Individual owner
Missouri
Standard 2025-07-23 ValidFAA registration status code V: Valid registration. All codes
N52AA Beech
B19
Fixed-wing, single engine Individual owner
California
Standard 2025-07-23 ValidFAA registration status code V: Valid registration. All codes
N5827D Piper
PA-22-150
Fixed-wing, single engine Co-owned owner
California
Standard 2025-07-23 ValidFAA registration status code V: Valid registration. All codes
N61677 Cessna
172M
Fixed-wing, single engine Morcom Aviation Services INC DBA
Everett, Washington
Standard 2025-07-23 ValidFAA registration status code V: Valid registration. All codes
N6385W Piper
PA-28-140
Fixed-wing, single engine Individual owner
West Virginia
Standard 2025-07-23 ValidFAA registration status code V: Valid registration. All codes
N68504 Bellanca
7GCBC
Fixed-wing, single engine US Liberty Holdings LLC
Caldwell, Idaho
Restricted 2025-07-23 ValidFAA registration status code V: Valid registration. All codes
N79028 Cessna
172K
Fixed-wing, single engine Jdc Aviation LLC
Upland, California
Standard 2025-07-23 ValidFAA registration status code V: Valid registration. All codes
N8979D Piper
PA-18-150
Fixed-wing, single engine Individual owner
Alaska
Multiple 2025-07-23 ValidFAA registration status code V: Valid registration. All codes
N95CP Cessna
172M
Fixed-wing, single engine Co-owned owner
North Carolina
Multiple 2025-07-23 ValidFAA registration status code V: Valid registration. All codes
N1331T Piper
PA-28-140
Fixed-wing, single engine Co-owned owner
California
Standard 2025-07-22 ValidFAA registration status code V: Valid registration. All codes
N1545J Piper
PA-28-140
Fixed-wing, single engine Co-owned owner
Missouri
Standard 2025-07-22 ValidFAA registration status code V: Valid registration. All codes
N221HL Robinson Helicopter
R22 BETA
Helicopter South Florida Helicopters INC
Indiantown, Florida
Standard 2025-07-22 ValidFAA registration status code V: Valid registration. All codes
N35672 Cessna
172I
Fixed-wing, single engine Leaseair LLC
Wilmington, Delaware
Standard 2025-07-22 ValidFAA registration status code V: Valid registration. All codes
N4347H Piper
PA-28-161
Fixed-wing, single engine Individual owner
Texas
Standard 2025-07-22 ValidFAA registration status code V: Valid registration. All codes
N5137M Beech
B19
Fixed-wing, single engine Future Pilots of America Flight Academy LLC
Baxley, Georgia
Standard 2025-07-22 ValidFAA registration status code V: Valid registration. All codes
N5319X Piper
PA-28-161
Fixed-wing, single engine Meadowlake Aviation LLC
Lenoir City, Tennessee
Standard 2025-07-22 ValidFAA registration status code V: Valid registration. All codes
N55320 Cessna
172P
Fixed-wing, single engine Dragon Flight Training Academy LLC
Pembroke Pines, Florida
Standard 2025-07-22 ValidFAA registration status code V: Valid registration. All codes
N6145W Piper
PA-28-140
Fixed-wing, single engine
Standard 2025-07-22 ValidFAA registration status code V: Valid registration. All codes
N64186 Cessna
172M
Fixed-wing, single engine Paraloft LLC
Mims, Florida
Standard 2025-07-22 ValidFAA registration status code V: Valid registration. All codes
N739YZ Cessna
172N
Fixed-wing, single engine Socal Aviation INC
Chino, California
Standard 2025-07-22 ValidFAA registration status code V: Valid registration. All codes
N909VC Cessna
172M
Fixed-wing, single engine San Bernardino Community College District
San Bernardino, California
Standard 2025-07-22 ValidFAA registration status code V: Valid registration. All codes
N44690 Piper
PA-28-151
Fixed-wing, single engine H&M Air LLC
Metamora, Michigan
Standard 2025-07-19 ValidFAA registration status code V: Valid registration. All codes
N6147H Piper
PA-28-161
Fixed-wing, single engine Individual owner
California
Standard 2025-07-19 ValidFAA registration status code V: Valid registration. All codes
N7759W Piper
PA-28-161
Fixed-wing, single engine Individual owner
Texas
Standard 2025-07-19 ValidFAA registration status code V: Valid registration. All codes
N737PM Cessna
172N
Fixed-wing, single engine Socal Aviation INC
Chino, California
Standard 2025-07-16 ValidFAA registration status code V: Valid registration. All codes
N739AT Cessna
172N
Fixed-wing, single engine Socal Aviation INC
Chino, California
Standard 2025-07-16 ValidFAA registration status code V: Valid registration. All codes
N2397L Beech
23
Fixed-wing, single engine Individual owner
Alaska
Standard 2025-07-15 ValidFAA registration status code V: Valid registration. All codes
N3298T Cessna
177
Fixed-wing, single engine 515 Aviation LLC
Dexter, Iowa
Standard 2025-07-15 ValidFAA registration status code V: Valid registration. All codes
N46621 Cessna
172K
Fixed-wing, single engine Lake Clark Holdings LLC
Port Alsworth, Alaska
Standard 2025-07-15 ValidFAA registration status code V: Valid registration. All codes
N4842T Piper
PA-28-140
Fixed-wing, single engine Individual owner
Nevada
Standard 2025-07-15 ValidFAA registration status code V: Valid registration. All codes
N5708U Piper
PA-28-140
Fixed-wing, single engine Fwj Aviation LLC
Crown Point, Indiana
Standard 2025-07-15 ValidFAA registration status code V: Valid registration. All codes
N59T Turner Jerry D
RV-6
Fixed-wing, single engine Individual owner
Texas
Experimental 2025-07-15 ValidFAA registration status code V: Valid registration. All codes
N6051L American
AA-5
Fixed-wing, single engine Co-owned owner
Texas
Standard 2025-07-15 ValidFAA registration status code V: Valid registration. All codes
N7539R Piper
PA-28-180
Fixed-wing, single engine Individual owner
Oregon
Standard 2025-07-15 ValidFAA registration status code V: Valid registration. All codes
N9936W Piper
PA-28-140
Fixed-wing, single engine Brown Thrasher Aero LLC
Midland, Georgia
Standard 2025-07-15 ValidFAA registration status code V: Valid registration. All codes
N15914 Piper
PA-28-140
Fixed-wing, single engine Individual owner
Colorado
Standard 2025-07-14 ValidFAA registration status code V: Valid registration. All codes
N4170J Piper
PA-28-140
Fixed-wing, single engine Individual owner
Texas
Standard 2025-07-14 ValidFAA registration status code V: Valid registration. All codes
N4494F Piper
PA-23-160
Fixed-wing, multi-engine Bella'S Business LLC
Kalispell, Montana
Standard 2025-07-14 ValidFAA registration status code V: Valid registration. All codes
N5162F Cessna
172N
Fixed-wing, single engine Individual owner
Arizona
Standard 2025-07-14 ValidFAA registration status code V: Valid registration. All codes
N6915Q Beech
A23-19
Fixed-wing, single engine Individual owner
Arizona
Limited 2025-07-14 ValidFAA registration status code V: Valid registration. All codes
N3142T Cessna
177
Fixed-wing, single engine Tri State Airmotive LLC
Berryville, Arkansas
Standard 2025-07-11 ValidFAA registration status code V: Valid registration. All codes
N4121Z Piper
PA-18
Fixed-wing, single engine Visionary Adventures LLC
Anchorage, Alaska
Restricted 2025-07-11 ValidFAA registration status code V: Valid registration. All codes
N70340 Cessna
172M
Fixed-wing, single engine Wings Over Texas Holdings LLC
Denton, Texas
Standard 2025-07-11 ValidFAA registration status code V: Valid registration. All codes
N1541U Cessna
172M
Fixed-wing, single engine Wings Over Texas Holdings LLC
Denton, Texas
Standard 2025-07-10 ValidFAA registration status code V: Valid registration. All codes
N272FD Piper
PA-28-140
Fixed-wing, single engine Fly Dynasty CORP
Ocala, Florida
Standard 2025-07-10 ValidFAA registration status code V: Valid registration. All codes
N3302Z Piper
PA-22-150
Fixed-wing, single engine Individual owner
Arizona
Standard 2025-07-10 ValidFAA registration status code V: Valid registration. All codes
N4748A Piper
PA-22-150
Fixed-wing, single engine Individual owner
Alaska
Standard 2025-07-10 ValidFAA registration status code V: Valid registration. All codes
N50208 Cessna
172M
Fixed-wing, single engine Individual owner
Texas
Standard 2025-07-10 ValidFAA registration status code V: Valid registration. All codes
N54715 Cessna
172P
Fixed-wing, single engine Apt Aero LLC
Port Angeles, Washington
Standard 2025-07-10 ValidFAA registration status code V: Valid registration. All codes
N7200L American
AA-5
Fixed-wing, single engine Individual owner
Tennessee
Standard 2025-07-10 ValidFAA registration status code V: Valid registration. All codes
N9885U Grumman American Avn. Corp.
AA-5A
Fixed-wing, single engine Individual owner
New York
Standard 2025-07-10 ValidFAA registration status code V: Valid registration. All codes
N99243 Cessna
172P
Fixed-wing, single engine Wings Over Texas Holdings LLC
Denton, Texas
Standard 2025-07-10 ValidFAA registration status code V: Valid registration. All codes
N5843W Piper
PA-28-150
Fixed-wing, single engine Skyunityventures LLC
Richmond Hill, New York
Standard 2025-07-09 ValidFAA registration status code V: Valid registration. All codes
N7231J Piper
PA-28-140
Fixed-wing, single engine Mcflight Aviation LLC
Highland, Utah
Standard 2025-07-09 ValidFAA registration status code V: Valid registration. All codes
Previous Page 25 of 200 Next

Source: FAA Civil Aviation Registry, Releasable Aircraft Database (the engine reference table and each aircraft's engine code), October 7, 2026. Horsepower and thrust are the FAA's figures for the series, not for a particular aircraft.