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
N5764U Piper
PA-28-140
Fixed-wing, single engine Individual owner
New Hampshire
Standard 2018-05-22 ValidFAA registration status code V: Valid registration. All codes
N9606D Piper
PA-22-150
Fixed-wing, single engine Niemi Danny L
Osage, Minnesota
Standard 2018-05-22 ValidFAA registration status code V: Valid registration. All codes
N131S Stiner
DER JAGER D IX
Fixed-wing, single engine Individual owner
Florida
Experimental 2018-05-21 ValidFAA registration status code V: Valid registration. All codes
N374FT Piper
PA-28-161
Fixed-wing, single engine Co-owned owner
Colorado
Standard 2018-05-21 ValidFAA registration status code V: Valid registration. All codes
N43311 Piper
PA-28-140
Fixed-wing, single engine Co-owned owner
Arizona
Standard 2018-05-21 ValidFAA registration status code V: Valid registration. All codes
N5181R Cessna
172M
Fixed-wing, single engine Individual owner
North Carolina
Standard 2018-05-21 ValidFAA registration status code V: Valid registration. All codes
N55JJ Bellanca
7GCAA
Fixed-wing, single engine Individual owner
Texas
Standard 2018-05-21 ValidFAA registration status code V: Valid registration. All codes
N5754F Piper
PA-28-140
Fixed-wing, single engine Individual owner
Washington
Standard 2018-05-21 ValidFAA registration status code V: Valid registration. All codes
N575TD Cessna
172N
Fixed-wing, single engine Individual owner
Montana
Standard 2018-05-21 ValidFAA registration status code V: Valid registration. All codes
N738RC Cessna
172N
Fixed-wing, single engine Co-owned owner
Missouri
Standard 2018-05-21 ValidFAA registration status code V: Valid registration. All codes
N7455R Piper
PA-28-140
Fixed-wing, single engine Individual owner
Arizona
Standard 2018-05-21 ValidFAA registration status code V: Valid registration. All codes
N309RB Ross Burk
LONG EZ
Fixed-wing, single engine Co-owned owner
Wyoming
Experimental 2018-05-18 ValidFAA registration status code V: Valid registration. All codes
N8L Pitts Special
S-1C
Fixed-wing, single engine Everything Pitts LLC
Queen Creek, Arizona
Experimental 2018-05-18 ValidFAA registration status code V: Valid registration. All codes
N15888 Piper
PA-28-140
Fixed-wing, single engine Individual owner
Florida
Standard 2018-05-17 ValidFAA registration status code V: Valid registration. All codes
N400FL Piper
PA-28-140
Fixed-wing, single engine Individual owner
South Carolina
Standard 2018-05-17 ValidFAA registration status code V: Valid registration. All codes
N4366R Cessna
172M
Fixed-wing, single engine Individual owner
Maine
Standard 2018-05-17 ValidFAA registration status code V: Valid registration. All codes
N451BT Piper
PA-28-140
Fixed-wing, single engine Neosho Investments LLC
Neosho, Missouri
Standard 2018-05-17 ValidFAA registration status code V: Valid registration. All codes
N5357E Cessna
172N
Fixed-wing, single engine Individual owner
Virginia
Standard 2018-05-17 ValidFAA registration status code V: Valid registration. All codes
N651TS Bond
THORP T-18
Fixed-wing, single engine Individual owner
Virginia
Experimental 2018-05-17 ValidFAA registration status code V: Valid registration. All codes
N98708 Cessna
172P
Fixed-wing, single engine Madera County Sheriffs Office
Madera, California
Standard 2018-05-17 ValidFAA registration status code V: Valid registration. All codes
N9925Y Champion
7GCB
Fixed-wing, single engine Individual owner
Alaska
Multiple 2018-05-17 ValidFAA registration status code V: Valid registration. All codes
N338PM Marso Peter G
KITFOX S7 SUPERSPORT
Fixed-wing, single engine Individual owner
Iowa
Experimental 2018-05-16 ValidFAA registration status code V: Valid registration. All codes
N555VC Piper
PA-28-140
Fixed-wing, single engine Individual owner
California
Standard 2018-05-16 ValidFAA registration status code V: Valid registration. All codes
N645RF Piper
PA-18-150
Fixed-wing, single engine Individual owner
Alaska
Multiple 2018-05-16 ValidFAA registration status code V: Valid registration. All codes
N9057H Cessna
172M
Fixed-wing, single engine Individual owner
Georgia
Standard 2018-05-16 ValidFAA registration status code V: Valid registration. All codes
N9123H Cessna
172M
Fixed-wing, single engine Twenty Three Juliet LLC
Tyler, Texas
Multiple 2018-05-16 ValidFAA registration status code V: Valid registration. All codes
N9730P Piper
PA-18-150
Fixed-wing, single engine Individual owner
Washington
Restricted 2018-05-16 ValidFAA registration status code V: Valid registration. All codes
N1544J Piper
PA-28-140
Fixed-wing, single engine Co-owned owner
Indiana
Standard 2018-05-15 ValidFAA registration status code V: Valid registration. All codes
N1638J Piper
PA-28-140
Fixed-wing, single engine Individual owner
Arkansas
Standard 2018-05-15 ValidFAA registration status code V: Valid registration. All codes
N1880T Piper
PA-28-140
Fixed-wing, single engine Co-owned owner
Minnesota
Standard 2018-05-15 ValidFAA registration status code V: Valid registration. All codes
N5093K Cessna
172N
Fixed-wing, single engine L A M Capital Management LLC
Sheridan, Wyoming
Standard 2018-05-15 ValidFAA registration status code V: Valid registration. All codes
N656TS Cessna
172P
Fixed-wing, single engine N656Ts LLC
Stuart, Florida
Standard 2018-05-15 ValidFAA registration status code V: Valid registration. All codes
N730HA Cessna
172M
Fixed-wing, single engine Honaker Group LLC
Sellersburg, Indiana
Standard 2018-05-15 ValidFAA registration status code V: Valid registration. All codes
N738BG Cessna
172N
Fixed-wing, single engine Elon Aviation LLC
Burlington, North Carolina
Standard 2018-05-15 ValidFAA registration status code V: Valid registration. All codes
N88081 Bellanca
7GCBC
Fixed-wing, single engine Individual owner
California
Standard 2018-05-15 ValidFAA registration status code V: Valid registration. All codes
N13437 Cessna
172M
Fixed-wing, single engine Individual owner
Washington
Standard 2018-05-14 ValidFAA registration status code V: Valid registration. All codes
N65658 Cessna
172P
Fixed-wing, single engine L A M Capital Management LLC
Sheridan, Wyoming
Standard 2018-05-14 ValidFAA registration status code V: Valid registration. All codes
N7544R Piper
PA-28-140
Fixed-wing, single engine Reyes Aviation INC
Middletown, Delaware
Standard 2018-05-14 ValidFAA registration status code V: Valid registration. All codes
N7823G Cessna
172L
Fixed-wing, single engine American Patrols INC
Midland, Texas
Standard 2018-05-14 ValidFAA registration status code V: Valid registration. All codes
N9389L Cessna
172P
Fixed-wing, single engine L A M Capital Management LLC
Sheridan, Wyoming
Standard 2018-05-14 ValidFAA registration status code V: Valid registration. All codes
N4496P Piper
PA-23-160
Fixed-wing, multi-engine Individual owner
Puerto Rico
Standard 2018-05-11 ValidFAA registration status code V: Valid registration. All codes
N7832D Piper
PA-22-150
Fixed-wing, single engine Individual owner
Louisiana
Standard 2018-05-11 ValidFAA registration status code V: Valid registration. All codes
N2265A Piper
PA-18-135
Fixed-wing, single engine Individual owner
Alaska
Standard 2018-05-10 ValidFAA registration status code V: Valid registration. All codes
N2620C Robinson Helicopter
R22 BETA
Helicopter Individual owner
Ohio
Standard 2018-05-10 ValidFAA registration status code V: Valid registration. All codes
N99NX Noel Lester J
WAG AERO SUPER CUBY
Fixed-wing, single engine Individual owner
Texas
Experimental 2018-05-10 ValidFAA registration status code V: Valid registration. All codes
N1809T Piper
PA-28-140
Fixed-wing, single engine Individual owner
Texas
Standard 2018-05-09 ValidFAA registration status code V: Valid registration. All codes
N29028 Cessna
172M
Fixed-wing, single engine Service Oriented Aviation Readiness (Soar)
Bolivar, Missouri
Standard 2018-05-09 ValidFAA registration status code V: Valid registration. All codes
N84782 Cessna
172K
Fixed-wing, single engine Rzs Enterprises INC
Finley, North Dakota
Standard 2018-05-09 ValidFAA registration status code V: Valid registration. All codes
N3511Z Piper
PA-22-150
Fixed-wing, single engine Individual owner
Oklahoma
Standard 2018-05-08 ValidFAA registration status code V: Valid registration. All codes
N4313J Piper
PA-28-140
Fixed-wing, single engine Individual owner
California
Standard 2018-05-08 ValidFAA registration status code V: Valid registration. All codes
N702BS American Champion Aircraft
7GCBC
Fixed-wing, single engine Two Bravo Sierra LLC
Auburn, California
Standard 2018-05-08 ValidFAA registration status code V: Valid registration. All codes
N7646D Piper
PA-22-150
Fixed-wing, single engine Individual owner
Wisconsin
Standard 2018-05-08 ValidFAA registration status code V: Valid registration. All codes
N925RS Slagle Robert E
THORP T-18
Fixed-wing, single engine Individual owner
Oklahoma
Experimental 2018-05-08 ValidFAA registration status code V: Valid registration. All codes
N96839 Cessna
172P
Fixed-wing, single engine Eastern Shore Aviation
Onancock, Virginia
Standard 2018-05-08 ValidFAA registration status code V: Valid registration. All codes
N20061 Cessna
172M
Fixed-wing, single engine 7B Flying Club INC
Sandpoint, Idaho
Standard 2018-05-07 ValidFAA registration status code V: Valid registration. All codes
N2199P Piper
PA-23
Fixed-wing, multi-engine Individual owner
New York
Standard 2018-05-07 ValidFAA registration status code V: Valid registration. All codes
N5378Y Piper
PA-18-150
Fixed-wing, single engine Ragwing Flyers LLC
Richmond, Texas
Standard 2018-05-07 ValidFAA registration status code V: Valid registration. All codes
N57446 Bellanca
7GCBC
Fixed-wing, single engine Individual owner
Alaska
Standard 2018-05-07 ValidFAA registration status code V: Valid registration. All codes
N62BH Hennings Bobbie J
RV-6
Fixed-wing, single engine Individual owner
Georgia
Experimental 2018-05-07 ValidFAA registration status code V: Valid registration. All codes
N3037F Piper
PA-28-161
Fixed-wing, single engine Nulton Enterprises LLC
Johnstown, Pennsylvania
Standard 2018-05-04 ValidFAA registration status code V: Valid registration. All codes
N35544 Cessna
172I
Fixed-wing, single engine Sunquest Aircraft LLC
Wappingers Falls, New York
Standard 2018-05-04 ValidFAA registration status code V: Valid registration. All codes
N7559G Cessna
172L
Fixed-wing, single engine Individual owner
Nevada
Standard 2018-05-04 ValidFAA registration status code V: Valid registration. All codes
N90558 Cessna
172P
Fixed-wing, single engine Hagele Aviation LLC
Hillsboro, Oregon
Standard 2018-05-04 ValidFAA registration status code V: Valid registration. All codes
N2396Q Beech
23
Fixed-wing, single engine Phantom Works Flying Club INC
Saint Peters, Missouri
Standard 2018-05-03 ValidFAA registration status code V: Valid registration. All codes
N41316 Piper
PA-28-151
Fixed-wing, single engine Elliott Barry e
Lake Havasu City, Arizona
Standard 2018-05-03 ValidFAA registration status code V: Valid registration. All codes
N7328G Cessna
172K
Fixed-wing, single engine Individual owner
Kentucky
Standard 2018-05-03 ValidFAA registration status code V: Valid registration. All codes
N1927F Cessna
172N
Fixed-wing, single engine Individual owner
Mississippi
Standard 2018-05-02 ValidFAA registration status code V: Valid registration. All codes
N4350R Cessna
172M
Fixed-wing, single engine B2 West CORP
Winona, Minnesota
Standard 2018-05-02 ValidFAA registration status code V: Valid registration. All codes
N43700 Piper
PA-28-161
Fixed-wing, single engine Aviation Career Enrichment INC
Atlanta, Georgia
Standard 2018-05-02 ValidFAA registration status code V: Valid registration. All codes
N817DH American Champion Aircraft
7GCBC
Fixed-wing, single engine Individual owner
Arizona
Standard 2018-05-02 ValidFAA registration status code V: Valid registration. All codes
N2488A Piper
PA-18A-135
Fixed-wing, single engine Individual owner
Montana
Standard 2018-05-01 ValidFAA registration status code V: Valid registration. All codes
N320DD Cessna
172M
Fixed-wing, single engine Co-owned owner
Oregon
Standard 2018-05-01 ValidFAA registration status code V: Valid registration. All codes
N7695K Piper
PA-20
Fixed-wing, single engine Chase 13 LLC
Wilmington, Delaware
Standard 2018-05-01 ValidFAA registration status code V: Valid registration. All codes
N9694W Piper
PA-28-140
Fixed-wing, single engine Individual owner
Montana
Standard 2018-05-01 ValidFAA registration status code V: Valid registration. All codes
N959E Piper
PA-18-135
Fixed-wing, single engine Rs Specialties LLC
Anchorage, Alaska
Multiple 2018-04-30 ValidFAA registration status code V: Valid registration. All codes
N733BP Cessna
172N
Fixed-wing, single engine Individual owner
Tennessee
Standard 2018-04-27 ValidFAA registration status code V: Valid registration. All codes
N41193 Piper
PA-28-140
Fixed-wing, single engine Stephen Air LLC
Woodsfield, Ohio
Standard 2018-04-26 ValidFAA registration status code V: Valid registration. All codes
N444KP Michel Laverdiere
VANS ACFT RV-9
Fixed-wing, single engine Individual owner
Texas
Experimental 2018-04-26 ValidFAA registration status code V: Valid registration. All codes
N19601 Cessna
172L
Fixed-wing, single engine Pnl Aviation LLC
Brunswick, Maine
Standard 2018-04-25 ValidFAA registration status code V: Valid registration. All codes
N43968 Taylorcraft
BCS12D-4-85
Fixed-wing, single engine Co-owned owner
Michigan
Standard 2018-04-25 ValidFAA registration status code V: Valid registration. All codes
N647JR Piper
PA-18-150
Fixed-wing, single engine Co-owned owner
Idaho
Standard 2018-04-25 ValidFAA registration status code V: Valid registration. All codes
N734XC Cessna
172N
Fixed-wing, single engine Individual owner
Florida
Standard 2018-04-25 ValidFAA registration status code V: Valid registration. All codes
N13492 Cessna
172M
Fixed-wing, single engine Individual owner
Arizona
Standard 2018-04-24 ValidFAA registration status code V: Valid registration. All codes
N2458P Piper
PA-22
Fixed-wing, single engine Individual owner
Kansas
Standard 2018-04-24 ValidFAA registration status code V: Valid registration. All codes
N8467D Piper
PA-18A 150
Fixed-wing, single engine Co-owned owner
Missouri
Standard 2018-04-24 ValidFAA registration status code V: Valid registration. All codes
N1096U Cessna
172M
Fixed-wing, single engine Co-owned owner
Wyoming
Standard 2018-04-23 ValidFAA registration status code V: Valid registration. All codes
N6274D Cessna
172N
Fixed-wing, single engine Oracle Aviation LLC
Omaha, Nebraska
Standard 2018-04-23 ValidFAA registration status code V: Valid registration. All codes
N41539 Piper
PA-28-151
Fixed-wing, single engine Individual owner
Florida
Standard 2018-04-20 ValidFAA registration status code V: Valid registration. All codes
N5526U Piper
PA-28-140
Fixed-wing, single engine Pearl Wings LLC
Doylestown, Ohio
Standard 2018-04-20 ValidFAA registration status code V: Valid registration. All codes
N738UW Cessna
172N
Fixed-wing, single engine Aircraft Management Services INC
Milton, Florida
Standard 2018-04-20 ValidFAA registration status code V: Valid registration. All codes
N79296 Cessna
172K
Fixed-wing, single engine Individual owner
Missouri
Standard 2018-04-20 ValidFAA registration status code V: Valid registration. All codes
N1329C Piper
PA-22-150
Fixed-wing, single engine Individual owner
Wisconsin
Standard 2018-04-19 ValidFAA registration status code V: Valid registration. All codes
N133JL Furey John
FUREY-RV6A
Fixed-wing, single engine Alpha Air INC
Wrightwood, California
Experimental 2018-04-19 ValidFAA registration status code V: Valid registration. All codes
N1388U Cessna
172M
Fixed-wing, single engine Individual owner
California
Standard 2018-04-19 ValidFAA registration status code V: Valid registration. All codes
N2489A Piper
PA-18-135
Fixed-wing, single engine Co-owned owner
Wyoming
Restricted 2018-04-19 ValidFAA registration status code V: Valid registration. All codes
N35762 Piper
J5A
Fixed-wing, single engine Aerial Sign North INC
Lakewood, New Jersey
Restricted 2018-04-19 ValidFAA registration status code V: Valid registration. All codes
N3965X Piper
PA-28-140
Fixed-wing, single engine Individual owner
Iowa
Standard 2018-04-19 ValidFAA registration status code V: Valid registration. All codes
N4033T Robinson Helicopter
R22 BETA
Helicopter Crop Doctors LLC
Micanopy, Florida
Standard 2018-04-19 ValidFAA registration status code V: Valid registration. All codes
N43899 Piper
PA-28-161
Fixed-wing, single engine Smtm Holdings INC
Wilmington, Delaware
Standard 2018-04-19 ValidFAA registration status code V: Valid registration. All codes
N4644J Cessna
172N
Fixed-wing, single engine Individual owner
North Carolina
Standard 2018-04-19 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.