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
N5536E Cessna
172N
Fixed-wing, single engine Jeffries and Hendley LLC
Greenwood, Indiana
Standard 2025-04-29 ValidFAA registration status code V: Valid registration. All codes
N55925 Piper
PA-28-140
Fixed-wing, single engine Individual owner
New Mexico
Standard 2025-04-29 ValidFAA registration status code V: Valid registration. All codes
N61799 Cessna
172M
Fixed-wing, single engine Flf Aviation LLC
West Columbia, South Carolina
Standard 2025-04-29 ValidFAA registration status code V: Valid registration. All codes
N7041C Piper
PA-28-140
Fixed-wing, single engine Individual owner
New York
Standard 2025-04-29 ValidFAA registration status code V: Valid registration. All codes
N811HA Cessna
177
Fixed-wing, single engine Co-owned owner
North Carolina
Standard 2025-04-29 ValidFAA registration status code V: Valid registration. All codes
N8304R Piper
PA-28-140
Fixed-wing, single engine Knots and Attitudes LLC
Wimberley, Texas
Standard 2025-04-29 ValidFAA registration status code V: Valid registration. All codes
N9026D Piper
PA-22-160
Fixed-wing, single engine Individual owner
Texas
Standard 2025-04-29 ValidFAA registration status code V: Valid registration. All codes
N9771Q Boswell Oscar W
RV 4
Fixed-wing, single engine Aerospec Insurance LLC
Gig Harbor, Washington
Experimental 2025-04-29 ValidFAA registration status code V: Valid registration. All codes
N241MJ Jimenez Mario A
MUSTANG II
Fixed-wing, single engine Mj Aero LLC
Mims, Florida
Experimental 2025-04-28 ValidFAA registration status code V: Valid registration. All codes
N4526R Piper
PA-28-140
Fixed-wing, single engine Individual owner
Florida
Standard 2025-04-28 ValidFAA registration status code V: Valid registration. All codes
N8321P Robinson Helicopter
R22 BETA
Helicopter Smoketown Helicopters LLC
Smoketown, Pennsylvania
Standard 2025-04-28 ValidFAA registration status code V: Valid registration. All codes
N8879E Piper
PA-28-140
Fixed-wing, single engine Individual owner
Pennsylvania
Standard 2025-04-28 ValidFAA registration status code V: Valid registration. All codes
N6963D Piper
PA-18A 150
Fixed-wing, single engine Abu Trailers INC
Dwight, North Dakota
Standard 2025-04-26 ValidFAA registration status code V: Valid registration. All codes
N106WT Piper
PA-18-150
Fixed-wing, single engine Individual owner
Alaska
Standard 2025-04-22 ValidFAA registration status code V: Valid registration. All codes
N38RH Hartzell Richard E
ACRO SPORT
Fixed-wing, single engine Individual owner
Louisiana
Experimental 2025-04-22 ValidFAA registration status code V: Valid registration. All codes
N5589F Piper
PA-28-140
Fixed-wing, single engine Tjl Aviation LLC
Atlanta, Georgia
Standard 2025-04-22 ValidFAA registration status code V: Valid registration. All codes
N56041 Piper
PA-28-140
Fixed-wing, single engine Co-owned owner
North Carolina
Standard 2025-04-22 ValidFAA registration status code V: Valid registration. All codes
N7205Q Cessna
172L
Fixed-wing, single engine N7205Q LLC
Titusville, Florida
Standard 2025-04-22 ValidFAA registration status code V: Valid registration. All codes
N8177N Piper
PA-28-140
Fixed-wing, single engine Individual owner
Texas
Standard 2025-04-22 ValidFAA registration status code V: Valid registration. All codes
N8617D Piper
PA-22-160
Fixed-wing, single engine Individual owner
Arizona
Standard 2025-04-22 ValidFAA registration status code V: Valid registration. All codes
N1416T Piper
PA-28-140
Fixed-wing, single engine
Standard 2025-04-21 ValidFAA registration status code V: Valid registration. All codes
N43813 Piper
PA-28-161
Fixed-wing, single engine Gq Aviation LLC
Cherry Hill, New Jersey
Standard 2025-04-21 ValidFAA registration status code V: Valid registration. All codes
N46YH Pratt Jay R
RV6
Fixed-wing, single engine Co-owned owner
Texas
Experimental 2025-04-21 ValidFAA registration status code V: Valid registration. All codes
N5070V Varga Aircraft Corp.
2150A
Fixed-wing, single engine Individual owner
Arizona
Standard 2025-04-21 ValidFAA registration status code V: Valid registration. All codes
N6285F Cessna
172N
Fixed-wing, single engine Wright Base Flight Training LLC
Tullahoma, Tennessee
Standard 2025-04-21 ValidFAA registration status code V: Valid registration. All codes
N990VT Piper
PA-28-140
Fixed-wing, single engine Co-owned owner
Georgia
Standard 2025-04-21 ValidFAA registration status code V: Valid registration. All codes
N178FV Cessna
172M
Fixed-wing, single engine D R Tripp Enterprises LLC
Omaha, Nebraska
Standard 2025-04-19 ValidFAA registration status code V: Valid registration. All codes
N999AR Cessna
172N
Fixed-wing, single engine D R Tripp Enterprises LLC
Omaha, Nebraska
Standard 2025-04-19 ValidFAA registration status code V: Valid registration. All codes
N2887E Cessna
172N
Fixed-wing, single engine Individual owner
California
Standard 2025-04-18 ValidFAA registration status code V: Valid registration. All codes
N2946E Cessna
172N
Fixed-wing, single engine High Wing Air Services LLC
Merritt Island, Florida
Standard 2025-04-18 ValidFAA registration status code V: Valid registration. All codes
N647M Michael J Ashura
RV-6
Fixed-wing, single engine Hanbo Aviation INC
Wilmington, Delaware
Experimental 2025-04-18 ValidFAA registration status code V: Valid registration. All codes
N9733W Piper
PA-28-140
Fixed-wing, single engine Individual owner
Georgia
Standard 2025-04-18 ValidFAA registration status code V: Valid registration. All codes
N1957 Cessna
172N
Fixed-wing, single engine
Standard 2025-04-17 ValidFAA registration status code V: Valid registration. All codes
N2544P Piper
PA-22-150
Fixed-wing, single engine Individual owner
Arkansas
Standard 2025-04-17 ValidFAA registration status code V: Valid registration. All codes
N2918X Piper
PA-28-161
Fixed-wing, single engine Flight Leasing CORP
Wilmington, Delaware
Standard 2025-04-17 ValidFAA registration status code V: Valid registration. All codes
N4431R Cessna
172M
Fixed-wing, single engine Raritan Valley Flying School
Princeton, New Jersey
Standard 2025-04-17 ValidFAA registration status code V: Valid registration. All codes
N7562D Piper
PA-18A 150
Fixed-wing, single engine Individual owner
Wisconsin
Multiple 2025-04-17 ValidFAA registration status code V: Valid registration. All codes
N75711 Cessna
172N
Fixed-wing, single engine Falcon Air LLC
Anchorage, Alaska
Standard 2025-04-17 ValidFAA registration status code V: Valid registration. All codes
N9114H Cessna
172M
Fixed-wing, single engine Individual owner
Arizona
Standard 2025-04-17 ValidFAA registration status code V: Valid registration. All codes
N21403 Cessna
172M
Fixed-wing, single engine Bering Capital LLC
Anchorage, Alaska
Standard 2025-04-16 ValidFAA registration status code V: Valid registration. All codes
N24928 Piper
J3C-65
Fixed-wing, single engine Individual owner
Arizona
Experimental 2025-04-16 ValidFAA registration status code V: Valid registration. All codes
N3817P Piper
PA-22-150
Fixed-wing, single engine Individual owner
Nebraska
Standard 2025-04-16 ValidFAA registration status code V: Valid registration. All codes
N5256H Cessna
172M
Fixed-wing, single engine Individual owner
Indiana
Restricted 2025-04-16 ValidFAA registration status code V: Valid registration. All codes
N5339H Cessna
172M
Fixed-wing, single engine Bering Capital LLC
Anchorage, Alaska
Standard 2025-04-16 ValidFAA registration status code V: Valid registration. All codes
N7226D Piper
PA-22-160
Fixed-wing, single engine Individual owner
Missouri
Standard 2025-04-16 ValidFAA registration status code V: Valid registration. All codes
N734VV Cessna
172N
Fixed-wing, single engine Summit Flight Services LLC
Paden, Oklahoma
Standard 2025-04-16 ValidFAA registration status code V: Valid registration. All codes
N737SR Cessna
172N
Fixed-wing, single engine Above the Haze LLC
San Lorenzo, California
Standard 2025-04-16 ValidFAA registration status code V: Valid registration. All codes
N7545K Piper
PA-18-105 SPECIAL
Fixed-wing, single engine Individual owner
Kansas
Experimental 2025-04-16 ValidFAA registration status code V: Valid registration. All codes
N9526H Cessna
172M
Fixed-wing, single engine Above the Haze LLC
San Lorenzo, California
Standard 2025-04-16 ValidFAA registration status code V: Valid registration. All codes
N9662V Cessna
172M
Fixed-wing, single engine Level X Aviation LLC
Royal Palm Beach, Florida
Standard 2025-04-16 ValidFAA registration status code V: Valid registration. All codes
N12138 Cessna
172M
Fixed-wing, single engine Falcon Air LLC
Anchorage, Alaska
Standard 2025-04-15 ValidFAA registration status code V: Valid registration. All codes
N224FL Robinson Helicopter
R22 BETA
Helicopter Fingerlakes Wing and Rotor LLC
Seneca Falls, New York
Standard 2025-04-15 ValidFAA registration status code V: Valid registration. All codes
N2866X Cessna
177
Fixed-wing, single engine Individual owner
California
Standard 2025-04-15 ValidFAA registration status code V: Valid registration. All codes
N3236P Piper
PA-18-150
Fixed-wing, single engine Falcon Air LLC
Anchorage, Alaska
Multiple 2025-04-15 ValidFAA registration status code V: Valid registration. All codes
N44WK Klink Wallace
RV-3
Fixed-wing, single engine Individual owner
Georgia
Experimental 2025-04-15 ValidFAA registration status code V: Valid registration. All codes
N61710 Cessna
172M
Fixed-wing, single engine Bob Hoover Academy INC
Salinas, California
Standard 2025-04-15 ValidFAA registration status code V: Valid registration. All codes
N6856W Piper
PA-28-140
Fixed-wing, single engine Individual owner
Texas
Standard 2025-04-15 ValidFAA registration status code V: Valid registration. All codes
N79945 Cessna
172K
Fixed-wing, single engine Iron Horse Cub LLC
Granbury, Texas
Standard 2025-04-15 ValidFAA registration status code V: Valid registration. All codes
N9322R Robinson Helicopter
R22 BETA
Helicopter Helicopter Logging LLC
Lagrange, Ohio
Standard 2025-04-15 ValidFAA registration status code V: Valid registration. All codes
N9683Q Cessna
172M
Fixed-wing, single engine Bering Capital LLC
Anchorage, Alaska
Standard 2025-04-15 ValidFAA registration status code V: Valid registration. All codes
N1203F Cessna
172N
Fixed-wing, single engine Rawson Aviation LLC
Collinsville, Oklahoma
Standard 2025-04-14 ValidFAA registration status code V: Valid registration. All codes
N1271P Piper
PA-23
Fixed-wing, multi-engine Wendt Aero LLC
Newberg, Oregon
Standard 2025-04-14 ValidFAA registration status code V: Valid registration. All codes
N1584J Piper
PA-28-140
Fixed-wing, single engine Individual owner
Missouri
Standard 2025-04-14 ValidFAA registration status code V: Valid registration. All codes
N298J Bellanca
7GCAA
Fixed-wing, single engine Bank of Utah Trustee
Salt Lake City, Utah
Standard 2025-04-14 ValidFAA registration status code V: Valid registration. All codes
N3526K Piper
PA-28-140
Fixed-wing, single engine Individual owner
Arizona
Standard 2025-04-14 ValidFAA registration status code V: Valid registration. All codes
N4360Q Cessna
172L
Fixed-wing, single engine Individual owner
Texas
Standard 2025-04-14 ValidFAA registration status code V: Valid registration. All codes
N47367 Piper
PA-28-161
Fixed-wing, single engine Swaz Aviation LLC
Mesa, Arizona
Standard 2025-04-14 ValidFAA registration status code V: Valid registration. All codes
N29350 Cessna
177
Fixed-wing, single engine Cardinal Flyers LLC
Amherst, Virginia
Standard 2025-04-12 ValidFAA registration status code V: Valid registration. All codes
N591RV Sims David L
RV-9A
Fixed-wing, single engine Individual owner
Florida
Experimental 2025-04-11 ValidFAA registration status code V: Valid registration. All codes
N737YB Cessna
172N
Fixed-wing, single engine Co-owned owner
North Dakota
Standard 2025-04-11 ValidFAA registration status code V: Valid registration. All codes
N8115L Piper
PA-28-161
Fixed-wing, single engine Double Greene LLC
Spout Spring, Virginia
Standard 2025-04-11 ValidFAA registration status code V: Valid registration. All codes
N36800 Piper
PA-28-161
Fixed-wing, single engine Fly Aviation CORP
Wilmington, Delaware
Standard 2025-04-10 ValidFAA registration status code V: Valid registration. All codes
N1016F Cessna
172N
Fixed-wing, single engine Fly Cadillac LLC
Tustin, Michigan
Standard 2025-04-09 ValidFAA registration status code V: Valid registration. All codes
N2867T Piper
PA-28-140
Fixed-wing, single engine N504Fl LLC
Killeen, Texas
Standard 2025-04-09 ValidFAA registration status code V: Valid registration. All codes
N3465K Piper
PA-28-140
Fixed-wing, single engine Individual owner
North Carolina
Standard 2025-04-09 ValidFAA registration status code V: Valid registration. All codes
N5588F Piper
PA-28-140
Fixed-wing, single engine Rckr Aviation LLC
Chehalis, Washington
Standard 2025-04-09 ValidFAA registration status code V: Valid registration. All codes
N5970B Mayfield-Ivo
OSPREY 2
Fixed-wing, single engine Individual owner
Michigan
Experimental 2025-04-09 ValidFAA registration status code V: Valid registration. All codes
N6654F Piper
PA-28-151
Fixed-wing, single engine Red River Aviators Flying Club
Bossier City, Louisiana
Standard 2025-04-09 ValidFAA registration status code V: Valid registration. All codes
N9543W Piper
PA-28-140
Fixed-wing, single engine Individual owner
Texas
Standard 2025-04-09 ValidFAA registration status code V: Valid registration. All codes
N1171C Piper
PA-20
Fixed-wing, single engine Individual owner
Alaska
Standard 2025-04-08 ValidFAA registration status code V: Valid registration. All codes
N1559J Piper
PA-28-140
Fixed-wing, single engine Individual owner
Maryland
Standard 2025-04-08 ValidFAA registration status code V: Valid registration. All codes
N1897J Piper
PA-28-140
Fixed-wing, single engine Co-owned owner
Washington
Standard 2025-04-08 ValidFAA registration status code V: Valid registration. All codes
N3452T Cessna
177
Fixed-wing, single engine Individual owner
Wisconsin
Standard 2025-04-08 ValidFAA registration status code V: Valid registration. All codes
N43431 Piper
PA-28-140
Fixed-wing, single engine Individual owner
Kentucky
Standard 2025-04-08 ValidFAA registration status code V: Valid registration. All codes
N547CA Piper
PA-28-140
Fixed-wing, single engine Career Flyers LLC
Crittenden, Kentucky
Standard 2025-04-08 ValidFAA registration status code V: Valid registration. All codes
N73370 Cessna
172M
Fixed-wing, single engine Bay Flying Services LLC
Pinconning, Michigan
Standard 2025-04-08 ValidFAA registration status code V: Valid registration. All codes
N90974 Bellanca
7GCBC
Fixed-wing, single engine Individual owner
Alaska
Standard 2025-04-08 ValidFAA registration status code V: Valid registration. All codes
N953LC Clements Lee
GLASTAR
Fixed-wing, single engine Individual owner
Texas
Experimental 2025-04-08 ValidFAA registration status code V: Valid registration. All codes
N32711 Piper
PA-28-140
Fixed-wing, single engine Three Rivers Aero LLC
Three Rivers, Michigan
Standard 2025-04-07 ValidFAA registration status code V: Valid registration. All codes
N57683 Bellanca
7GCBC
Fixed-wing, single engine Co-owned owner
Louisiana
Standard 2025-04-07 ValidFAA registration status code V: Valid registration. All codes
N8042F Cessna
172M
Fixed-wing, single engine Flying Hawks INC
Palmyra, Wisconsin
Standard 2025-04-07 ValidFAA registration status code V: Valid registration. All codes
N219CF Faust Billy O
CHUBY CUBY
Fixed-wing, single engine Individual owner
Texas
Experimental 2025-04-06 ValidFAA registration status code V: Valid registration. All codes
N6409D Cessna
172N
Fixed-wing, single engine Montgomery Aviation LLC
San Diego, California
Standard 2025-04-06 ValidFAA registration status code V: Valid registration. All codes
N8706D Piper
PA-22-150
Fixed-wing, single engine Co-owned owner
Oklahoma
Standard 2025-04-06 ValidFAA registration status code V: Valid registration. All codes
N4039Z Piper
PA-18-150
Fixed-wing, single engine Meeker Airport INC
Meeker, Colorado
Restricted 2025-04-05 ValidFAA registration status code V: Valid registration. All codes
N9698W Piper
PA-28-140
Fixed-wing, single engine Cas LTD
Swanton, Vermont
Standard 2025-04-05 ValidFAA registration status code V: Valid registration. All codes
N15104 Piper
PA-28-140
Fixed-wing, single engine Mil2Atp INC
Pikeville, North Carolina
Standard 2025-04-04 ValidFAA registration status code V: Valid registration. All codes
N5954U Piper
PA-28-140
Fixed-wing, single engine Co-owned owner
California
Standard 2025-04-04 ValidFAA registration status code V: Valid registration. All codes
N7255F Piper
PA-28-140
Fixed-wing, single engine N7255F LLC
Cedar City, Utah
Standard 2025-04-04 ValidFAA registration status code V: Valid registration. All codes
N144MR Rouse James Murray
RV-4
Fixed-wing, single engine
Experimental 2025-04-03 ValidFAA registration status code V: Valid registration. All codes
Previous Page 30 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.