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
N78461 Cessna
172K
Fixed-wing, single engine Individual owner
Michigan
Standard 2018-06-28 ValidFAA registration status code V: Valid registration. All codes
N13540 Cessna
172M
Fixed-wing, single engine Co-owned owner
Kansas
Standard 2018-06-27 ValidFAA registration status code V: Valid registration. All codes
N2326W Robinson Helicopter
R22 BETA
Helicopter Individual owner
California
Standard 2018-06-27 ValidFAA registration status code V: Valid registration. All codes
N43289 Piper
PA-28-151
Fixed-wing, single engine Individual owner
Alabama
Standard 2018-06-27 ValidFAA registration status code V: Valid registration. All codes
N5993E Cessna
172N
Fixed-wing, single engine Tss Flying Club INC
Bethesda, Maryland
Standard 2018-06-27 ValidFAA registration status code V: Valid registration. All codes
N8712D Piper
PA-22-160
Fixed-wing, single engine Withheld at owner's request
Standard 2018-06-26 ValidFAA registration status code V: Valid registration. All codes
N9726P Piper
PA-18-150
Fixed-wing, single engine International Air Services INC Trustee
Carson City, Nevada
Standard 2018-06-26 ValidFAA registration status code V: Valid registration. All codes
N9626H Cessna
172M
Fixed-wing, single engine Individual owner
Alaska
Standard 2018-06-25 ValidFAA registration status code V: Valid registration. All codes
N203BC Bass Bill
SCOOTER II
Fixed-wing, single engine Co-owned owner
Alaska
Experimental 2018-06-22 ValidFAA registration status code V: Valid registration. All codes
N7564D Piper
PA-18A
Fixed-wing, single engine Individual owner
Arkansas
Multiple 2018-06-22 ValidFAA registration status code V: Valid registration. All codes
N9653P Piper
PA-18-150
Fixed-wing, single engine Individual owner
Texas
Multiple 2018-06-22 ValidFAA registration status code V: Valid registration. All codes
N121EC Cessna
177
Fixed-wing, single engine N121Ecfllyers LLC
South Jordan, Utah
Standard 2018-06-21 ValidFAA registration status code V: Valid registration. All codes
N489AC American Champion Aircraft
7GCAA
Fixed-wing, single engine Kuza Flyers LLC
Rock Hill, South Carolina
Standard 2018-06-21 ValidFAA registration status code V: Valid registration. All codes
N5435W Piper
PA-28-160
Fixed-wing, single engine Co-owned owner
Florida
Standard 2018-06-21 ValidFAA registration status code V: Valid registration. All codes
N75942 Cessna
172N
Fixed-wing, single engine Individual owner
Texas
Standard 2018-06-21 ValidFAA registration status code V: Valid registration. All codes
N79506 Cessna
172K
Fixed-wing, single engine Individual owner
California
Standard 2018-06-21 ValidFAA registration status code V: Valid registration. All codes
N274WE Piper
PA-18-150
Fixed-wing, single engine Individual owner
Maine
Standard 2018-06-20 ValidFAA registration status code V: Valid registration. All codes
N4899G Cessna
172N
Fixed-wing, single engine Jf Property Leasing INC
Port Orchard, Washington
Standard 2018-06-20 ValidFAA registration status code V: Valid registration. All codes
N82951 Piper
PA-18-150
Fixed-wing, single engine Av Enterprises INC
Bozeman, Montana
Standard 2018-06-20 ValidFAA registration status code V: Valid registration. All codes
N23MT Kennedy Martin F
LONG EZ
Fixed-wing, single engine Rutan Aircraft Flying Experience
Waller, Texas
Experimental 2018-06-19 ValidFAA registration status code V: Valid registration. All codes
N4400J Piper
PA-28-140
Fixed-wing, single engine Individual owner
Minnesota
Standard 2018-06-19 ValidFAA registration status code V: Valid registration. All codes
N65798 Cessna
172P
Fixed-wing, single engine Individual owner
Arizona
Standard 2018-06-19 ValidFAA registration status code V: Valid registration. All codes
N65923 Cessna
172P
Fixed-wing, single engine Individual owner
Washington
Standard 2018-06-19 ValidFAA registration status code V: Valid registration. All codes
N733NF Cessna
172N
Fixed-wing, single engine Individual owner
Washington
Standard 2018-06-19 ValidFAA registration status code V: Valid registration. All codes
N738GJ Cessna
172N
Fixed-wing, single engine Jlinn Aviation INC
Quinlan, Texas
Standard 2018-06-19 ValidFAA registration status code V: Valid registration. All codes
N7822D Piper
PA-22-150
Fixed-wing, single engine Twinco Leasing LLC
Yacolt, Washington
Standard 2018-06-19 ValidFAA registration status code V: Valid registration. All codes
N97PZ Brown M R/Brown L A
COZY
Fixed-wing, single engine Co-owned owner
California
Experimental 2018-06-19 ValidFAA registration status code V: Valid registration. All codes
N9824V Cessna
172M
Fixed-wing, single engine Safety In Motion Flight Center
Puyallup, Washington
Standard 2018-06-19 ValidFAA registration status code V: Valid registration. All codes
N12390 Cessna
172M
Fixed-wing, single engine Lowcountry Aviation Company Brokerage LLC
Walterboro, South Carolina
Standard 2018-06-18 ValidFAA registration status code V: Valid registration. All codes
N24HJ Jakel Helmut Leo
RV-4
Fixed-wing, single engine Individual owner
California
Experimental 2018-06-18 ValidFAA registration status code V: Valid registration. All codes
N50397 Bellanca
7GCBC
Fixed-wing, single engine Individual owner
Nevada
Standard 2018-06-18 ValidFAA registration status code V: Valid registration. All codes
N8610R Tener Dean R
RV9A
Fixed-wing, single engine Individual owner
Ohio
Experimental 2018-06-18 ValidFAA registration status code V: Valid registration. All codes
N9935D Piper
PA-18A 150
Fixed-wing, single engine Davis Nigel L
Helena, Montana
Multiple 2018-06-18 ValidFAA registration status code V: Valid registration. All codes
N7161Q Cessna
172L
Fixed-wing, single engine Frigate Aviation LLC
Smithville, Ohio
Standard 2018-06-15 ValidFAA registration status code V: Valid registration. All codes
N7208F Piper
PA-28-140
Fixed-wing, single engine Individual owner
California
Standard 2018-06-15 ValidFAA registration status code V: Valid registration. All codes
N8829D Piper
PA-22-150
Fixed-wing, single engine Schwenninger Ronald L
Allison Park, Pennsylvania
Standard 2018-06-15 ValidFAA registration status code V: Valid registration. All codes
N1126M Cessna
172L
Fixed-wing, single engine D2 Government Solutions LLC
New Bern, North Carolina
Standard 2018-06-14 ValidFAA registration status code V: Valid registration. All codes
N2803P Piper
PA-22-150
Fixed-wing, single engine Individual owner
Illinois
Standard 2018-06-14 ValidFAA registration status code V: Valid registration. All codes
N3176U Maule
MX-7-160
Fixed-wing, single engine Individual owner
Oklahoma
Standard 2018-06-14 ValidFAA registration status code V: Valid registration. All codes
N4239Q Cessna
172L
Fixed-wing, single engine Elizabeth City State University
Elizabeth City, North Carolina
Standard 2018-06-14 ValidFAA registration status code V: Valid registration. All codes
N4358W Beech
B19
Fixed-wing, single engine Sun Flyers LLC
Orlando, Florida
Standard 2018-06-14 ValidFAA registration status code V: Valid registration. All codes
N6908B Piper
PA-28-161
Fixed-wing, single engine Meriden Aviation Center LLC
Meriden, Connecticut
Standard 2018-06-14 ValidFAA registration status code V: Valid registration. All codes
N734FM Cessna
172N
Fixed-wing, single engine D2 Government Solutions LLC
New Bern, North Carolina
Standard 2018-06-14 ValidFAA registration status code V: Valid registration. All codes
N7918S Bellanca
7GCBC
Fixed-wing, single engine Individual owner
Minnesota
Standard 2018-06-14 ValidFAA registration status code V: Valid registration. All codes
N110RJ Cessna
172N
Fixed-wing, single engine Individual owner
California
Standard 2018-06-13 ValidFAA registration status code V: Valid registration. All codes
N35315 Cessna
172I
Fixed-wing, single engine Individual owner
Texas
Standard 2018-06-13 ValidFAA registration status code V: Valid registration. All codes
N5063V Varga Aircraft Corp.
2150A
Fixed-wing, single engine Individual owner
Maine
Standard 2018-06-13 ValidFAA registration status code V: Valid registration. All codes
N8441L Cessna
172I
Fixed-wing, single engine G1 Aviation LLC
Ocala, Florida
Standard 2018-06-12 ValidFAA registration status code V: Valid registration. All codes
N2721 Thorp
T-18
Fixed-wing, single engine Individual owner
Texas
Experimental 2018-06-11 ValidFAA registration status code V: Valid registration. All codes
N6012L American
AA-5
Fixed-wing, single engine Cloudkicker Lc
Sioux Falls, South Dakota
Standard 2018-06-11 ValidFAA registration status code V: Valid registration. All codes
N6983H Cessna
172M
Fixed-wing, single engine Waddell Pap LLC
Friendswood, Texas
Standard 2018-06-11 ValidFAA registration status code V: Valid registration. All codes
N82750 Piper
PA-28-161
Fixed-wing, single engine Co-owned owner
Florida
Standard 2018-06-11 ValidFAA registration status code V: Valid registration. All codes
N9715C Piper
PA-28-161
Fixed-wing, single engine Co-owned owner
Missouri
Standard 2018-06-11 ValidFAA registration status code V: Valid registration. All codes
N1974J Cessna
172M
Fixed-wing, single engine Texarkana Flying Club INC
Texarkana, Texas
Standard 2018-06-08 ValidFAA registration status code V: Valid registration. All codes
N6853J Piper
PA-28-151
Fixed-wing, single engine Monte & CO LLC
Cedar Key, Florida
Standard 2018-06-08 ValidFAA registration status code V: Valid registration. All codes
N36JW Cessna
172M
Fixed-wing, single engine Barr Air Patrol LLC
Mesquite, Texas
Standard 2018-06-07 ValidFAA registration status code V: Valid registration. All codes
N41738 Piper
PA-28-151
Fixed-wing, single engine Dadson Aviation LLC
Lowell, Indiana
Standard 2018-06-07 ValidFAA registration status code V: Valid registration. All codes
N4334R Cessna
172M
Fixed-wing, single engine Air Dakota Flite INC
Hettinger, North Dakota
Standard 2018-06-07 ValidFAA registration status code V: Valid registration. All codes
N5658U Piper
PA-28-140
Fixed-wing, single engine Individual owner
Tennessee
Standard 2018-06-07 ValidFAA registration status code V: Valid registration. All codes
N6532F Cessna
172N
Fixed-wing, single engine Individual owner
Louisiana
Standard 2018-06-07 ValidFAA registration status code V: Valid registration. All codes
N739FT Cessna
172N
Fixed-wing, single engine Wings of Her Dreams Aviation LLC
Belton, Texas
Standard 2018-06-07 ValidFAA registration status code V: Valid registration. All codes
N766TW Cessna
172P
Fixed-wing, single engine Barr Air Patrol LLC
Mesquite, Texas
Standard 2018-06-07 ValidFAA registration status code V: Valid registration. All codes
N8400S Piper
PA-28-161
Fixed-wing, single engine Co-owned owner
Iowa
Standard 2018-06-07 ValidFAA registration status code V: Valid registration. All codes
N9889Q Cessna
172M
Fixed-wing, single engine Co-owned owner
Oregon
Multiple 2018-06-07 ValidFAA registration status code V: Valid registration. All codes
N11DC Thorp
T-18
Fixed-wing, single engine 11Dc LLC
Broomfield, Colorado
Experimental 2018-06-06 ValidFAA registration status code V: Valid registration. All codes
N41459 Piper
PA-28-151
Fixed-wing, single engine Erick Enterprises LLC
Spreckels, California
Standard 2018-06-06 ValidFAA registration status code V: Valid registration. All codes
N5904W Piper
PA-28-160
Fixed-wing, single engine Individual owner
Minnesota
Standard 2018-06-06 ValidFAA registration status code V: Valid registration. All codes
N6264Z Piper
PA-25
Fixed-wing, single engine Simmons Aviation Services LLC
Pawcatuck, Connecticut
Restricted 2018-06-06 ValidFAA registration status code V: Valid registration. All codes
N64510 Cessna
172M
Fixed-wing, single engine Individual owner
Texas
Standard 2018-06-06 ValidFAA registration status code V: Valid registration. All codes
N737LG Cessna
172N
Fixed-wing, single engine Airborne Mgmt LLC
Dublin, Ohio
Standard 2018-06-06 ValidFAA registration status code V: Valid registration. All codes
N139SN Piper
PA-28-180
Fixed-wing, single engine Individual owner
Texas
Standard 2018-06-05 ValidFAA registration status code V: Valid registration. All codes
N3427Y Piper
PA-18-150
Fixed-wing, single engine Tradewind LLC
Wasilla, Alaska
Multiple 2018-06-05 ValidFAA registration status code V: Valid registration. All codes
N43556 Piper
PA-28-151
Fixed-wing, single engine Co-owned owner
California
Standard 2018-06-05 ValidFAA registration status code V: Valid registration. All codes
N4483Z Piper
PA-18-150
Fixed-wing, single engine Wild Valley LLC
Wasilla, Alaska
Standard 2018-06-05 ValidFAA registration status code V: Valid registration. All codes
N8879N Piper
PA-28-140
Fixed-wing, single engine Co-owned owner
California
Standard 2018-06-05 ValidFAA registration status code V: Valid registration. All codes
N9860G Cessna
172L
Fixed-wing, single engine Citabria INC
Auburn, California
Standard 2018-06-05 ValidFAA registration status code V: Valid registration. All codes
N1743J Piper
PA-28-140
Fixed-wing, single engine Individual owner
California
Standard 2018-06-04 ValidFAA registration status code V: Valid registration. All codes
N32906 Piper
PA-28-151
Fixed-wing, single engine Co-owned owner
Wisconsin
Standard 2018-06-04 ValidFAA registration status code V: Valid registration. All codes
N33417 Piper
PA-28-151
Fixed-wing, single engine Mercer Aviation Group LLC
Mercer Island, Washington
Standard 2018-06-04 ValidFAA registration status code V: Valid registration. All codes
N416RH Hamorski Joseph
VAN'S RV-4
Fixed-wing, single engine Individual owner
Tennessee
Experimental 2018-06-04 ValidFAA registration status code V: Valid registration. All codes
N5402L Grumman American Avn. Corp.
AA-5
Fixed-wing, single engine Individual owner
Virginia
Standard 2018-06-04 ValidFAA registration status code V: Valid registration. All codes
N76AU Von Dane William E
RV-8A
Fixed-wing, single engine Individual owner
Florida
Experimental 2018-06-04 ValidFAA registration status code V: Valid registration. All codes
N1757M Piper
PA-18A 150
Fixed-wing, single engine Adventurous LLC
Hayden, Idaho
Standard 2018-06-01 ValidFAA registration status code V: Valid registration. All codes
N6707H Cessna
172M
Fixed-wing, single engine Wjt Investments LLC
Gurley, Alabama
Standard 2018-06-01 ValidFAA registration status code V: Valid registration. All codes
N6595K Colonial
C-1
Fixed-wing, single engine Mr B Aviation LLC
Sag Harbor, New York
Standard 2018-05-31 ValidFAA registration status code V: Valid registration. All codes
N4533A Piper
PA-22-150
Fixed-wing, single engine Individual owner
Alaska
Standard 2018-05-29 ValidFAA registration status code V: Valid registration. All codes
N6602R Beech
B19
Fixed-wing, single engine Fagundes Farms
Hanford, California
Standard 2018-05-29 ValidFAA registration status code V: Valid registration. All codes
N93RR Ronald T Reid
RV-9
Fixed-wing, single engine Individual owner
California
Experimental 2018-05-29 ValidFAA registration status code V: Valid registration. All codes
N6399N Champion
7GCAA
Fixed-wing, single engine Individual owner
Missouri
Standard 2018-05-25 ValidFAA registration status code V: Valid registration. All codes
N2150P Piper
PA-23
Fixed-wing, multi-engine Individual owner
Pennsylvania
Standard 2018-05-24 ValidFAA registration status code V: Valid registration. All codes
N43128 Piper
PA-28-161
Fixed-wing, single engine United States Air Force Owner
Hanscom Afb, Massachusetts
Standard 2018-05-24 ValidFAA registration status code V: Valid registration. All codes
N4377W Piper
PA-28-161
Fixed-wing, single engine Individual owner
Utah
Standard 2018-05-24 ValidFAA registration status code V: Valid registration. All codes
N730BR Reed Charles E Jr
RV-4
Fixed-wing, single engine Individual owner
Arizona
Experimental 2018-05-24 ValidFAA registration status code V: Valid registration. All codes
N9643W Piper
PA-28-140
Fixed-wing, single engine N9643W LLC
Dover, Delaware
Standard 2018-05-24 ValidFAA registration status code V: Valid registration. All codes
N96K Piper
PA-28-140
Fixed-wing, single engine Co-owned owner
Florida
Standard 2018-05-24 ValidFAA registration status code V: Valid registration. All codes
N6396N Champion
7ECA
Fixed-wing, single engine Champion Aircraft LLC
Valdosta, Georgia
Standard 2018-05-23 ValidFAA registration status code V: Valid registration. All codes
N6699 Clark John C
RV-9A
Fixed-wing, single engine Jcmc INC
Junction City, Kansas
Experimental 2018-05-23 ValidFAA registration status code V: Valid registration. All codes
N6816W Piper
PA-28-140
Fixed-wing, single engine Individual owner
Michigan
Standard 2018-05-23 ValidFAA registration status code V: Valid registration. All codes
N734HM Cessna
172N
Fixed-wing, single engine Individual owner
Idaho
Standard 2018-05-23 ValidFAA registration status code V: Valid registration. All codes
N351GP Cessna
172I
Fixed-wing, single engine Individual owner
Arkansas
Standard 2018-05-22 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.