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
N739JB Cessna
172N
Fixed-wing, single engine S O W Aviation LLC
Crystal River, Florida
Standard 2019-12-05 ValidFAA registration status code V: Valid registration. All codes
N7575G Cessna
172L
Fixed-wing, single engine Kelley Aircraft LLC
Weyers Cave, Virginia
Standard 2019-12-05 ValidFAA registration status code V: Valid registration. All codes
N969GF Robinson Helicopter
R22 ALPHA
Helicopter Sky West Aviation INC Trustee
Albuquerque, New Mexico
Standard 2019-12-05 ValidFAA registration status code V: Valid registration. All codes
N30BK Frey F W
STARDUSTER TOO
Fixed-wing, single engine Individual owner
Texas
Experimental 2019-12-04 ValidFAA registration status code V: Valid registration. All codes
N6553K Cessna
172P
Fixed-wing, single engine Individual owner
West Virginia
Standard 2019-12-04 ValidFAA registration status code V: Valid registration. All codes
N733FF Cessna
172N
Fixed-wing, single engine Rising Wings Aviation INC
Casper, Wyoming
Standard 2019-12-04 ValidFAA registration status code V: Valid registration. All codes
N733TL Cessna
172N
Fixed-wing, single engine Rising Wings Aviation INC
Casper, Wyoming
Standard 2019-12-04 ValidFAA registration status code V: Valid registration. All codes
N737EE Cessna
172N
Fixed-wing, single engine Rising Wings Aviation INC
Casper, Wyoming
Standard 2019-12-04 ValidFAA registration status code V: Valid registration. All codes
N19668 Cessna
172L
Fixed-wing, single engine Individual owner
Florida
Standard 2019-12-03 ValidFAA registration status code V: Valid registration. All codes
N5401H Cessna
172M
Fixed-wing, single engine Dms Leasing Company LLC
Las Vegas, Nevada
Standard 2019-12-03 ValidFAA registration status code V: Valid registration. All codes
N66GZ South Florida Ultralights Inc
VANS RV-9A
Fixed-wing, single engine Individual owner
Massachusetts
Experimental 2019-12-03 ValidFAA registration status code V: Valid registration. All codes
N6859H Cessna
172M
Fixed-wing, single engine Individual owner
Michigan
Standard 2019-12-03 ValidFAA registration status code V: Valid registration. All codes
N733NV Cessna
172N
Fixed-wing, single engine Aero Maintenance INC
Vancouver, Washington
Standard 2019-12-03 ValidFAA registration status code V: Valid registration. All codes
N7409J Piper
PA-28-140
Fixed-wing, single engine Adp Consultants INC
Laurel, Maryland
Standard 2019-12-03 ValidFAA registration status code V: Valid registration. All codes
N74TX Bingelis Antoni
RV3
Fixed-wing, single engine Individual owner
Arizona
Experimental 2019-12-03 ValidFAA registration status code V: Valid registration. All codes
N8881V Cessna
172M
Fixed-wing, single engine Individual owner
New Hampshire
Standard 2019-12-03 ValidFAA registration status code V: Valid registration. All codes
N9971E Cessna
172N
Fixed-wing, single engine Individual owner
New Jersey
Standard 2019-12-03 ValidFAA registration status code V: Valid registration. All codes
N316ND Piper
PA-28-151
Fixed-wing, single engine Cirrus Aviation INC
Sarasota, Florida
Standard 2019-12-02 ValidFAA registration status code V: Valid registration. All codes
N4274Z Piper
PA-18-150
Fixed-wing, single engine Jantzen & Jantzen Farming LLC
Madrid, Nebraska
Standard 2019-12-02 ValidFAA registration status code V: Valid registration. All codes
N64111 Cessna
172M
Fixed-wing, single engine Jasper CO Airport Authority
Rensselaer, Indiana
Standard 2019-12-02 ValidFAA registration status code V: Valid registration. All codes
N79087 Cessna
172K
Fixed-wing, single engine Air Discovery la LLC
North Hollywood, California
Standard 2019-12-02 ValidFAA registration status code V: Valid registration. All codes
N84169 Cessna
172K
Fixed-wing, single engine Co-owned owner
Kentucky
Standard 2019-12-02 ValidFAA registration status code V: Valid registration. All codes
N2323T Piper
PA-28-140
Fixed-wing, single engine Individual owner
Texas
Standard 2019-11-27 ValidFAA registration status code V: Valid registration. All codes
N3535Q Cessna
172M
Fixed-wing, single engine Co-owned owner
Oregon
Standard 2019-11-26 ValidFAA registration status code V: Valid registration. All codes
N4221T Piper
PA-28-140
Fixed-wing, single engine Eralet INC
Middletown, Delaware
Standard 2019-11-25 ValidFAA registration status code V: Valid registration. All codes
N526EC Cobb Eric E
LONG EZ
Fixed-wing, single engine Individual owner
Alaska
Experimental 2019-11-25 ValidFAA registration status code V: Valid registration. All codes
N5339D Cessna
172N
Fixed-wing, single engine Individual owner
California
Standard 2019-11-25 ValidFAA registration status code V: Valid registration. All codes
N6740L Piper
PA-18-150
Fixed-wing, single engine Aslesen Leasin LLC
Halstad, Minnesota
Standard 2019-11-25 ValidFAA registration status code V: Valid registration. All codes
N6828B Piper
PA-22-150
Fixed-wing, single engine Individual owner
Texas
Standard 2019-11-25 ValidFAA registration status code V: Valid registration. All codes
N79274 Cessna
172K
Fixed-wing, single engine Individual owner
Maine
Standard 2019-11-25 ValidFAA registration status code V: Valid registration. All codes
N46743 Cessna
172K
Fixed-wing, single engine Individual owner
Texas
Standard 2019-11-22 ValidFAA registration status code V: Valid registration. All codes
N522JD Piper
PA-28-140
Fixed-wing, single engine Fly Around Alaska LLC
Palmer, Alaska
Standard 2019-11-22 ValidFAA registration status code V: Valid registration. All codes
N6116W Piper
PA-28-140
Fixed-wing, single engine Individual owner
Florida
Standard 2019-11-22 ValidFAA registration status code V: Valid registration. All codes
N98326 Cessna
172P
Fixed-wing, single engine Individual owner
California
Standard 2019-11-22 ValidFAA registration status code V: Valid registration. All codes
N1442U Cessna
172M
Fixed-wing, single engine Eastern Idaho Flying Club
Idaho Falls, Idaho
Standard 2019-11-21 ValidFAA registration status code V: Valid registration. All codes
N2114F Piper
PA-28-161
Fixed-wing, single engine Chapel Hill Flying Club DBA
Sanford, North Carolina
Standard 2019-11-21 ValidFAA registration status code V: Valid registration. All codes
N4300A Melby Timothy A
TM 20/14 COUGER
Fixed-wing, single engine Individual owner
Washington
Experimental 2019-11-21 ValidFAA registration status code V: Valid registration. All codes
N5346K Cessna
172P
Fixed-wing, single engine Usaeroflight LLC
Greenville, South Carolina
Standard 2019-11-21 ValidFAA registration status code V: Valid registration. All codes
N65KK Kreth Kieth
KRETH RV4
Fixed-wing, single engine Experimental N65Kk LLC
Little Rock, Arkansas
Experimental 2019-11-21 ValidFAA registration status code V: Valid registration. All codes
N733JE Cessna
172N
Fixed-wing, single engine Hagerstown Flight School LLC
Hagerstown, Maryland
Standard 2019-11-21 ValidFAA registration status code V: Valid registration. All codes
N739ZP Cessna
172N
Fixed-wing, single engine Blue Sky Aviation LLC
Watkins, Colorado
Standard 2019-11-21 ValidFAA registration status code V: Valid registration. All codes
N91QS Cessna
172N
Fixed-wing, single engine Fly Diablo INC
North Wales, Pennsylvania
Standard 2019-11-21 ValidFAA registration status code V: Valid registration. All codes
N16284 Piper
PA-28-140
Fixed-wing, single engine Individual owner
California
Standard 2019-11-20 ValidFAA registration status code V: Valid registration. All codes
N2042Q Cessna
172M
Fixed-wing, single engine Kachemak Bay Flying Service INC
Temple, Texas
Standard 2019-11-20 ValidFAA registration status code V: Valid registration. All codes
N23GN Piper
PA-23-160
Fixed-wing, multi-engine Midwest General and Mechanical Contractors INC
Highland, Wisconsin
Standard 2019-11-20 ValidFAA registration status code V: Valid registration. All codes
N6604W Piper
PA-28-140
Fixed-wing, single engine Co-owned owner
Indiana
Standard 2019-11-20 ValidFAA registration status code V: Valid registration. All codes
N737PH Cessna
172N
Fixed-wing, single engine Patriot Management CO INC
Solvang, California
Standard 2019-11-20 ValidFAA registration status code V: Valid registration. All codes
N738AV Cessna
172N
Fixed-wing, single engine Brantly Christopher Jay
Moore, South Carolina
Standard 2019-11-20 ValidFAA registration status code V: Valid registration. All codes
N8741M Beech
23
Fixed-wing, single engine Dodson International Parts INC
Rantoul, Kansas
Standard 2019-11-20 ValidFAA registration status code V: Valid registration. All codes
N9765D Piper
PA-22-150
Fixed-wing, single engine Individual owner
California
Standard 2019-11-20 ValidFAA registration status code V: Valid registration. All codes
N42JA Cessna
172M
Fixed-wing, single engine Jersey Aero Club INC
Lakewood, New Jersey
Standard 2019-11-19 ValidFAA registration status code V: Valid registration. All codes
N4344Z Piper
PA-18-150
Fixed-wing, single engine Individual owner
Massachusetts
Restricted 2019-11-19 ValidFAA registration status code V: Valid registration. All codes
N504MA Cessna
172P
Fixed-wing, single engine Eastern Kentucky University
Richmond, Kentucky
Standard 2019-11-19 ValidFAA registration status code V: Valid registration. All codes
N622NL Robinson Helicopter
R22 ALPHA
Helicopter 1St American Aviation INC
North Miami, Florida
Standard 2019-11-19 ValidFAA registration status code V: Valid registration. All codes
N6346R Piper
PA-28-140
Fixed-wing, single engine Individual owner
Wisconsin
Standard 2019-11-19 ValidFAA registration status code V: Valid registration. All codes
N6553E Cessna
172N
Fixed-wing, single engine Za Airport Rental LLC
Zanesville, Ohio
Standard 2019-11-19 ValidFAA registration status code V: Valid registration. All codes
N7141R Piper
PA-28-140
Fixed-wing, single engine Individual owner
Florida
Standard 2019-11-19 ValidFAA registration status code V: Valid registration. All codes
N8340L Cessna
172I
Fixed-wing, single engine Individual owner
California
Standard 2019-11-19 ValidFAA registration status code V: Valid registration. All codes
N8445S Piper
PA-28-161
Fixed-wing, single engine Wifa (Washington International Flight Acad) LLC
Gaithersburg, Maryland
Standard 2019-11-19 ValidFAA registration status code V: Valid registration. All codes
N15544 Piper
PA-28-140
Fixed-wing, single engine Co-owned owner
Indiana
Standard 2019-11-18 ValidFAA registration status code V: Valid registration. All codes
N4473P Piper
PA-23-160
Fixed-wing, multi-engine Individual owner
Texas
Standard 2019-11-18 ValidFAA registration status code V: Valid registration. All codes
N53904 Bellanca
7GCAA
Fixed-wing, single engine Individual owner
Iowa
Standard 2019-11-18 ValidFAA registration status code V: Valid registration. All codes
N2597F Champion
7GCAA
Fixed-wing, single engine Co-owned owner
New Mexico
Standard 2019-11-16 ValidFAA registration status code V: Valid registration. All codes
N3344J Cessna
150G
Fixed-wing, single engine Individual owner
Pennsylvania
Standard 2019-11-16 ValidFAA registration status code V: Valid registration. All codes
N367LR Piper
PA-28-140
Fixed-wing, single engine Individual owner
Florida
Standard 2019-11-16 ValidFAA registration status code V: Valid registration. All codes
N52602 Cessna
172P
Fixed-wing, single engine Hutch Aviation INC
Zavalla, Texas
Standard 2019-11-16 ValidFAA registration status code V: Valid registration. All codes
N7428R Piper
PA-28-140
Fixed-wing, single engine Individual owner
Washington
Standard 2019-11-16 ValidFAA registration status code V: Valid registration. All codes
N7624S Bellanca
8GCBC
Fixed-wing, single engine Individual owner
California
Multiple 2019-11-16 ValidFAA registration status code V: Valid registration. All codes
N95364 Piper
PA-28-140
Fixed-wing, single engine Co-owned owner
Indiana
Standard 2019-11-16 ValidFAA registration status code V: Valid registration. All codes
N7322F Piper
PA-28-140
Fixed-wing, single engine Individual owner
California
Standard 2019-11-15 ValidFAA registration status code V: Valid registration. All codes
N737YU Cessna
172N
Fixed-wing, single engine Lake Elmo Aero LLC
Lake Elmo, Minnesota
Standard 2019-11-15 ValidFAA registration status code V: Valid registration. All codes
N46153 Cessna
172I
Fixed-wing, single engine Individual owner
Puerto Rico
Standard 2019-11-14 ValidFAA registration status code V: Valid registration. All codes
N75516 Cessna
172N
Fixed-wing, single engine Morristown Flying Service INC
Talbott, Tennessee
Standard 2019-11-14 ValidFAA registration status code V: Valid registration. All codes
N8272C Piper
PA-28-161
Fixed-wing, single engine Individual owner
Pennsylvania
Standard 2019-11-14 ValidFAA registration status code V: Valid registration. All codes
N20404 Cessna
172M
Fixed-wing, single engine Air Data Solutions LLC
Natchitoches, Louisiana
Standard 2019-11-13 ValidFAA registration status code V: Valid registration. All codes
N2886Q Cessna
172L
Fixed-wing, single engine Wright Flyers Club INC
Huber Heights, Ohio
Standard 2019-11-13 ValidFAA registration status code V: Valid registration. All codes
N41577 Piper
PA-18-150
Fixed-wing, single engine Horseshoe Bar Land & Livestock LLC
Gillette, Wyoming
Standard 2019-11-13 ValidFAA registration status code V: Valid registration. All codes
N5392Y Piper
PA-18-150
Fixed-wing, single engine Individual owner
Alaska
Standard 2019-11-13 ValidFAA registration status code V: Valid registration. All codes
N560RJ Pratt Thomas H Jr
RV6-A
Fixed-wing, single engine Jenaero LLC
Cincinnati, Ohio
Experimental 2019-11-13 ValidFAA registration status code V: Valid registration. All codes
N5747D Piper
PA-22-150
Fixed-wing, single engine Individual owner
Missouri
Standard 2019-11-13 ValidFAA registration status code V: Valid registration. All codes
N64017 Cessna
172M
Fixed-wing, single engine Pilots Today INC
Berlin, Maryland
Standard 2019-11-13 ValidFAA registration status code V: Valid registration. All codes
N73395 Cessna
172M
Fixed-wing, single engine Co-owned owner
Kansas
Standard 2019-11-13 ValidFAA registration status code V: Valid registration. All codes
N78126 Cessna
172K
Fixed-wing, single engine Individual owner
Iowa
Standard 2019-11-13 ValidFAA registration status code V: Valid registration. All codes
N8321H Piper
PA-28-161
Fixed-wing, single engine Just Plane Fellas LLC
Omro, Wisconsin
Standard 2019-11-13 ValidFAA registration status code V: Valid registration. All codes
N1163E Bellanca
7GCBC
Fixed-wing, single engine Knik Flying Club LLC
Anchorage, Alaska
Standard 2019-11-12 ValidFAA registration status code V: Valid registration. All codes
N141DF Maule
MX-7-160
Fixed-wing, single engine Individual owner
Missouri
Standard 2019-11-12 ValidFAA registration status code V: Valid registration. All codes
N1754P Piper
PA-18A
Fixed-wing, single engine Co-owned owner
Alaska
Multiple 2019-11-12 ValidFAA registration status code V: Valid registration. All codes
N18PA Piper
PA-18-150
Fixed-wing, single engine American Warbirds INC
Fallon, Nevada
Standard 2019-11-12 ValidFAA registration status code V: Valid registration. All codes
N2524M Piper
PA-12
Fixed-wing, single engine Dd Leasing LLC
Aberdeen, Idaho
Standard 2019-11-12 ValidFAA registration status code V: Valid registration. All codes
N2711T Piper
PA-28-140
Fixed-wing, single engine Individual owner
California
Standard 2019-11-12 ValidFAA registration status code V: Valid registration. All codes
N3837Z Piper
PA-18-150
Fixed-wing, single engine Individual owner
Oregon
Standard 2019-11-12 ValidFAA registration status code V: Valid registration. All codes
N430BZ Clare James S
RV-4
Fixed-wing, single engine Individual owner
Maryland
Experimental 2019-11-12 ValidFAA registration status code V: Valid registration. All codes
N61890 Cessna
172M
Fixed-wing, single engine Stallion Leasing LLC
Louisville, Kentucky
Standard 2019-11-12 ValidFAA registration status code V: Valid registration. All codes
N79255 Cessna
172K
Fixed-wing, single engine Individual owner
North Carolina
Standard 2019-11-12 ValidFAA registration status code V: Valid registration. All codes
N8870D Piper
PA-22-150
Fixed-wing, single engine Individual owner
Arizona
Standard 2019-11-12 ValidFAA registration status code V: Valid registration. All codes
N98345 Piper
PA-28-140
Fixed-wing, single engine Fly Around Alaska LLC
Palmer, Alaska
Standard 2019-11-12 ValidFAA registration status code V: Valid registration. All codes
N12410 Cessna
172M
Fixed-wing, single engine Weiser Wings LLC
Houston, Texas
Standard 2019-11-08 ValidFAA registration status code V: Valid registration. All codes
N364M Robinson Helicopter
R22
Helicopter Individual owner
California
Standard 2019-11-08 ValidFAA registration status code V: Valid registration. All codes
N46652 Cessna
172K
Fixed-wing, single engine Individual owner
Mississippi
Standard 2019-11-08 ValidFAA registration status code V: Valid registration. All codes
N5706D Piper
PA-22-150
Fixed-wing, single engine Individual owner
Georgia
Standard 2019-11-08 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.