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
N2986P Piper
PA-18-150
Fixed-wing, single engine Bentley Aero INC
Wilmington, Delaware
Standard 2023-04-08 ValidFAA registration status code V: Valid registration. All codes
N541PC Socata
TAMPICO TB 9C
Fixed-wing, single engine Legacy Staining LLC
Monroe, Georgia
Standard 2023-04-08 ValidFAA registration status code V: Valid registration. All codes
N6326W Piper
PA-28-140
Fixed-wing, single engine Individual owner
Texas
Standard 2023-04-08 ValidFAA registration status code V: Valid registration. All codes
N73610 Cessna
172M
Fixed-wing, single engine Individual owner
Texas
Standard 2023-04-08 ValidFAA registration status code V: Valid registration. All codes
N7823H Piper
PA-12
Fixed-wing, single engine Co-owned owner
Alaska
Standard 2023-04-08 ValidFAA registration status code V: Valid registration. All codes
N12229 Cessna
172M
Fixed-wing, single engine Individual owner
Pennsylvania
Standard 2023-04-07 ValidFAA registration status code V: Valid registration. All codes
N1882P Piper
PA-18
Fixed-wing, single engine Air Dakota Flite INC
Hettinger, North Dakota
Standard 2023-04-07 ValidFAA registration status code V: Valid registration. All codes
N2132T Piper
PA-28-140
Fixed-wing, single engine Individual owner
Minnesota
Standard 2023-04-07 ValidFAA registration status code V: Valid registration. All codes
N2221K Piper
PA-28-161
Fixed-wing, single engine Inner Circle Air Group LLC
Dallas, Texas
Standard 2023-04-07 ValidFAA registration status code V: Valid registration. All codes
N2993G Champion
7GCBC
Fixed-wing, single engine Individual owner
Mississippi
Standard 2023-04-07 ValidFAA registration status code V: Valid registration. All codes
N3012D Piper
PA-28-161
Fixed-wing, single engine Individual owner
Georgia
Standard 2023-04-07 ValidFAA registration status code V: Valid registration. All codes
N35716 Cessna
172I
Fixed-wing, single engine Individual owner
Georgia
Standard 2023-04-07 ValidFAA registration status code V: Valid registration. All codes
N5088K Cessna
172N
Fixed-wing, single engine G & M Aircraft INC
Wheat Ridge, Colorado
Standard 2023-04-07 ValidFAA registration status code V: Valid registration. All codes
N7016B Piper
PA-22-150
Fixed-wing, single engine Unable Direct LLC
Kalispell, Montana
Restricted 2023-04-07 ValidFAA registration status code V: Valid registration. All codes
N738LC Cessna
172N
Fixed-wing, single engine Cruise Flight Academy INC
Dalton, Georgia
Standard 2023-04-07 ValidFAA registration status code V: Valid registration. All codes
N73964 Cessna
172N
Fixed-wing, single engine Coachron Investments LLC
Grosse Ile, Michigan
Standard 2023-04-07 ValidFAA registration status code V: Valid registration. All codes
N8538D Piper
PA-22-160
Fixed-wing, single engine Individual owner
Nevada
Standard 2023-04-07 ValidFAA registration status code V: Valid registration. All codes
N915CM Cessna
172M
Fixed-wing, single engine Vaayu Aviation LLC
Newark, California
Standard 2023-04-07 ValidFAA registration status code V: Valid registration. All codes
N172DG Cessna
172L
Fixed-wing, single engine Co-owned owner
California
Standard 2023-04-06 ValidFAA registration status code V: Valid registration. All codes
N19940 Cessna
172M
Fixed-wing, single engine Elk & Ram Aviation Group LLC
San Antonio, Texas
Standard 2023-04-06 ValidFAA registration status code V: Valid registration. All codes
N4009Z Piper
PA-18-150
Fixed-wing, single engine Individual owner
South Dakota
Restricted 2023-04-06 ValidFAA registration status code V: Valid registration. All codes
N5487K Cessna
172P
Fixed-wing, single engine Individual owner
Oregon
Standard 2023-04-06 ValidFAA registration status code V: Valid registration. All codes
N602JY Cessna
172M
Fixed-wing, single engine N13303 LLC
Miami, Florida
Standard 2023-04-06 ValidFAA registration status code V: Valid registration. All codes
N633WG Cessna
172I
Fixed-wing, single engine Wings of Grace Ministries INC
Melbourne, Florida
Standard 2023-04-06 ValidFAA registration status code V: Valid registration. All codes
N73898 Cessna
172N
Fixed-wing, single engine Con Moto Aviation LLC
Hemet, California
Standard 2023-04-06 ValidFAA registration status code V: Valid registration. All codes
N8937D Piper
PA-22-160
Fixed-wing, single engine Individual owner
California
Standard 2023-04-06 ValidFAA registration status code V: Valid registration. All codes
N9652W Piper
PA-28-140
Fixed-wing, single engine
Standard 2023-04-06 ValidFAA registration status code V: Valid registration. All codes
N13721 Cessna
172M
Fixed-wing, single engine Individual owner
Montana
Standard 2023-04-05 ValidFAA registration status code V: Valid registration. All codes
N21B Gleason Michael A
LANCAIR 320
Fixed-wing, single engine Individual owner
California
Experimental 2023-04-05 ValidFAA registration status code V: Valid registration. All codes
N2247K Piper
PA-28-161
Fixed-wing, single engine Skyline Solutions Unlimited LLC
Edgewater, Florida
Standard 2023-04-05 ValidFAA registration status code V: Valid registration. All codes
N2948T Aero Commander
100
Fixed-wing, single engine Co-owned owner
Missouri
Standard 2023-04-05 ValidFAA registration status code V: Valid registration. All codes
N3041A Piper
PA-28-161
Fixed-wing, single engine Miller Aircraft Services INC
Crookston, Minnesota
Standard 2023-04-05 ValidFAA registration status code V: Valid registration. All codes
N3905X Piper
PA-28-151
Fixed-wing, single engine Co-owned owner
Maryland
Standard 2023-04-05 ValidFAA registration status code V: Valid registration. All codes
N4197Z Piper
PA-18-150
Fixed-wing, single engine Individual owner
Texas
Standard 2023-04-05 ValidFAA registration status code V: Valid registration. All codes
N4436Q Cessna
172M
Fixed-wing, single engine Individual owner
Alaska
Standard 2023-04-05 ValidFAA registration status code V: Valid registration. All codes
N52436 Cessna
172P
Fixed-wing, single engine Angel Aviation INC
Peoria, Arizona
Standard 2023-04-05 ValidFAA registration status code V: Valid registration. All codes
N52700 Cessna
172P
Fixed-wing, single engine Air Transport INC DBA
Las Vegas, Nevada
Standard 2023-04-05 ValidFAA registration status code V: Valid registration. All codes
N5480W Piper
PA-28-160
Fixed-wing, single engine Individual owner
Oklahoma
Standard 2023-04-05 ValidFAA registration status code V: Valid registration. All codes
N5639U Piper
PA-28-140
Fixed-wing, single engine Individual owner
Arizona
Standard 2023-04-05 ValidFAA registration status code V: Valid registration. All codes
N5643U Piper
PA-28-140
Fixed-wing, single engine Exotic Sky LLC
Kalispell, Montana
Standard 2023-04-05 ValidFAA registration status code V: Valid registration. All codes
N623RC Compton Gary J
COMPTON RV-6A
Fixed-wing, single engine Individual owner
California
Experimental 2023-04-05 ValidFAA registration status code V: Valid registration. All codes
N6794H Cessna
172M
Fixed-wing, single engine Ps N6794H LLC
Green Bay, Wisconsin
Standard 2023-04-05 ValidFAA registration status code V: Valid registration. All codes
N7182R Piper
PA-28-140
Fixed-wing, single engine Stl Aviation LLC
Mchenry, Illinois
Standard 2023-04-05 ValidFAA registration status code V: Valid registration. All codes
N7219J Piper
PA-28-140
Fixed-wing, single engine Individual owner
Missouri
Standard 2023-04-05 ValidFAA registration status code V: Valid registration. All codes
N7682R Beech
19A
Fixed-wing, single engine Individual owner
Minnesota
Standard 2023-04-05 ValidFAA registration status code V: Valid registration. All codes
N79286 Cessna
172K
Fixed-wing, single engine Aberdeen Pilots LLC
Boerne, Texas
Standard 2023-04-05 ValidFAA registration status code V: Valid registration. All codes
N84054 Piper
PA-28-161
Fixed-wing, single engine Far Horizons LLC
Ravenel, South Carolina
Standard 2023-04-05 ValidFAA registration status code V: Valid registration. All codes
N8841Y Piper
PA-18-150
Fixed-wing, single engine Individual owner
Alaska
Multiple 2023-04-05 ValidFAA registration status code V: Valid registration. All codes
N9483C Piper
PA-28-161
Fixed-wing, single engine Cnczilla CO
Royersford, Pennsylvania
Standard 2023-04-05 ValidFAA registration status code V: Valid registration. All codes
N94LB Maule
MX-7-160
Fixed-wing, single engine Individual owner
New Jersey
Standard 2023-04-05 ValidFAA registration status code V: Valid registration. All codes
N9997Y Champion
7GCB
Fixed-wing, single engine Individual owner
Minnesota
Standard 2023-04-05 ValidFAA registration status code V: Valid registration. All codes
N1516P Piper
PA-22-135
Fixed-wing, single engine Individual owner
Alaska
Standard 2023-04-04 ValidFAA registration status code V: Valid registration. All codes
N166DC Callicoat L W Dee
RV4
Fixed-wing, single engine Individual owner
Virginia
Experimental 2023-04-04 ValidFAA registration status code V: Valid registration. All codes
N5556U Piper
PA-28-140
Fixed-wing, single engine Cynthiana Flying Group CORP
Cynthiana, Kentucky
Standard 2023-04-04 ValidFAA registration status code V: Valid registration. All codes
N62RT Piper
PA-18-150
Fixed-wing, single engine Individual owner
Idaho
Standard 2023-04-04 ValidFAA registration status code V: Valid registration. All codes
N75809 Cessna
172N
Fixed-wing, single engine C & S Flyers LLC
Grand Lake, Louisiana
Standard 2023-04-04 ValidFAA registration status code V: Valid registration. All codes
N88223 Bellanca
7GCAA
Fixed-wing, single engine Co-owned owner
Ohio
Standard 2023-04-04 ValidFAA registration status code V: Valid registration. All codes
N888ZG Piper
PA-28-140
Fixed-wing, single engine Ness Aviation LLC
Moriarty, New Mexico
Standard 2023-04-04 ValidFAA registration status code V: Valid registration. All codes
N26076 Grumman American Avn. Corp.
AA-5A
Fixed-wing, single engine Stevens Vincent T PC
Ogden, Utah
Standard 2023-04-03 ValidFAA registration status code V: Valid registration. All codes
N4138P Piper
PA-23-160
Fixed-wing, multi-engine Individual owner
New York
Standard 2023-04-03 ValidFAA registration status code V: Valid registration. All codes
N463DG Giddings Dorance
VANS RV 9A
Fixed-wing, single engine Individual owner
Nevada
Experimental 2023-04-03 ValidFAA registration status code V: Valid registration. All codes
N5054W Piper
PA-28
Fixed-wing, single engine Sonoma Skypark Flying Club
Sonoma, California
Standard 2023-04-03 ValidFAA registration status code V: Valid registration. All codes
N5160R Cessna
172M
Fixed-wing, single engine Individual owner
Vermont
Standard 2023-04-03 ValidFAA registration status code V: Valid registration. All codes
N6749B Piper
PA-22-150
Fixed-wing, single engine Individual owner
Indiana
Standard 2023-04-03 ValidFAA registration status code V: Valid registration. All codes
N8279N Piper
PA-28-140
Fixed-wing, single engine Individual owner
Florida
Standard 2023-04-03 ValidFAA registration status code V: Valid registration. All codes
N9887Q Cessna
172M
Fixed-wing, single engine Tupelo Aeronautics INC
Tupelo, Mississippi
Standard 2023-04-03 ValidFAA registration status code V: Valid registration. All codes
N9971Y Champion
7GCB
Fixed-wing, single engine Individual owner
Texas
Multiple 2023-04-02 ValidFAA registration status code V: Valid registration. All codes
N2821Z Piper
PA-22-160
Fixed-wing, single engine Individual owner
Arizona
Standard 2023-04-01 ValidFAA registration status code V: Valid registration. All codes
N3332T Cessna
177
Fixed-wing, single engine Individual owner
Ohio
Standard 2023-04-01 ValidFAA registration status code V: Valid registration. All codes
N4416J Piper
PA-28-140
Fixed-wing, single engine Boone Paint & Interiors INC
Boone, North Carolina
Standard 2023-04-01 ValidFAA registration status code V: Valid registration. All codes
N44571 Piper
PA-28-151
Fixed-wing, single engine Individual owner
Maryland
Standard 2023-04-01 ValidFAA registration status code V: Valid registration. All codes
N6297W Piper
PA-28-140
Fixed-wing, single engine Devils Lake Aero Repair INC
Devils Lake, North Dakota
Standard 2023-04-01 ValidFAA registration status code V: Valid registration. All codes
N6743J Piper
PA-28-140
Fixed-wing, single engine Individual owner
Wisconsin
Standard 2023-04-01 ValidFAA registration status code V: Valid registration. All codes
N7194B Piper
PA-22-150
Fixed-wing, single engine Individual owner
Arizona
Standard 2023-04-01 ValidFAA registration status code V: Valid registration. All codes
N8739E Piper
PA-28-151
Fixed-wing, single engine Robinson Wilbert J JR
Stockton, California
Standard 2023-04-01 ValidFAA registration status code V: Valid registration. All codes
N9733V Cessna
172M
Fixed-wing, single engine Individual owner
New York
Standard 2023-04-01 ValidFAA registration status code V: Valid registration. All codes
N9875D Piper
PA-18A 150
Fixed-wing, single engine Individual owner
Alaska
Standard 2023-04-01 ValidFAA registration status code V: Valid registration. All codes
N9950Q Piper
PA-18-135
Fixed-wing, single engine Individual owner
Alaska
Standard 2023-04-01 ValidFAA registration status code V: Valid registration. All codes
N172UC Cessna
172N
Fixed-wing, single engine Endeavour Flight Training INC
Opa Locka, Florida
Standard 2023-03-31 ValidFAA registration status code V: Valid registration. All codes
N2260Y Cessna
177
Fixed-wing, single engine Individual owner
Iowa
Standard 2023-03-31 ValidFAA registration status code V: Valid registration. All codes
N5154Q Cessna
172M
Fixed-wing, single engine Individual owner
Connecticut
Standard 2023-03-31 ValidFAA registration status code V: Valid registration. All codes
N86636 Bellanca
7GCBC
Fixed-wing, single engine Co-owned owner
Washington
Standard 2023-03-31 ValidFAA registration status code V: Valid registration. All codes
N901E Piper
PA-28-140
Fixed-wing, single engine High Five Flying LLC
Amarillo, Texas
Standard 2023-03-31 ValidFAA registration status code V: Valid registration. All codes
N9916W Piper
PA-28-140
Fixed-wing, single engine Individual owner
Washington
Standard 2023-03-31 ValidFAA registration status code V: Valid registration. All codes
N2943X Cessna
177
Fixed-wing, single engine Co-owned owner
California
Standard 2023-03-30 ValidFAA registration status code V: Valid registration. All codes
N30382 Piper
PA-28-161
Fixed-wing, single engine Individual owner
Arizona
Standard 2023-03-30 ValidFAA registration status code V: Valid registration. All codes
N5070L Piper
PA-18-150
Fixed-wing, single engine Individual owner
Alaska
Standard 2023-03-30 ValidFAA registration status code V: Valid registration. All codes
N6DJ Jordan Don R
VANS RV-6A
Fixed-wing, single engine Individual owner
Texas
Experimental 2023-03-30 ValidFAA registration status code V: Valid registration. All codes
N739AK Cessna
172N
Fixed-wing, single engine Individual owner
New Jersey
Standard 2023-03-30 ValidFAA registration status code V: Valid registration. All codes
N75132 Piper
PA-28-140
Fixed-wing, single engine Ferngulf Investments LLC
Loretto, Minnesota
Standard 2023-03-30 ValidFAA registration status code V: Valid registration. All codes
N78QP Piper
PA-18-150
Fixed-wing, single engine Individual owner
Washington
Standard 2023-03-30 ValidFAA registration status code V: Valid registration. All codes
N2390T Piper
PA-28-140
Fixed-wing, single engine Individual owner
Oklahoma
Standard 2023-03-29 ValidFAA registration status code V: Valid registration. All codes
N4364T Piper
PA-28-161
Fixed-wing, single engine Computec Technical Solutions INC
Eighty Four, Pennsylvania
Standard 2023-03-29 ValidFAA registration status code V: Valid registration. All codes
N5046T Piper
PA-28-140
Fixed-wing, single engine Stp Flight LLC
Saint Paul, Minnesota
Standard 2023-03-29 ValidFAA registration status code V: Valid registration. All codes
N6370D Cessna
172N
Fixed-wing, single engine Melbourne Flight Training LLC
Melbourne, Florida
Standard 2023-03-29 ValidFAA registration status code V: Valid registration. All codes
N6981B Piper
PA-18
Fixed-wing, single engine Individual owner
Alaska
Standard 2023-03-29 ValidFAA registration status code V: Valid registration. All codes
N99709 Cessna
172P
Fixed-wing, single engine Long Island Aviators LLC
Seaford, New York
Standard 2023-03-29 ValidFAA registration status code V: Valid registration. All codes
N1463T Piper
PA-28-140
Fixed-wing, single engine N1463T LLC
Oak Hill, Virginia
Standard 2023-03-28 ValidFAA registration status code V: Valid registration. All codes
N22230 Cessna
172M
Fixed-wing, single engine Individual owner
Washington
Standard 2023-03-28 ValidFAA registration status code V: Valid registration. All codes
N280JG Cessna
177
Fixed-wing, single engine Edwards Jonathan S
Marysvale, Utah
Standard 2023-03-28 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.