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
N37WT Cessna
172N
Fixed-wing, single engine Faulk County Flying Club INC
Faulkton, South Dakota
Standard 2016-09-21 ValidFAA registration status code V: Valid registration. All codes
N8412R Piper
PA-28-140
Fixed-wing, single engine Individual owner
Illinois
Standard 2016-09-21 ValidFAA registration status code V: Valid registration. All codes
N920PH Piper
PA-28-151
Fixed-wing, single engine Individual owner
Alabama
Standard 2016-09-21 ValidFAA registration status code V: Valid registration. All codes
N12556 Cessna
172M
Fixed-wing, single engine Individual owner
Ohio
Standard 2016-09-20 ValidFAA registration status code V: Valid registration. All codes
N13723 Cessna
172M
Fixed-wing, single engine Individual owner
Alabama
Standard 2016-09-20 ValidFAA registration status code V: Valid registration. All codes
N20282 Cessna
172M
Fixed-wing, single engine Individual owner
Ohio
Standard 2016-09-20 ValidFAA registration status code V: Valid registration. All codes
N29TE Piper
PA-28-161
Fixed-wing, single engine Individual owner
Oregon
Standard 2016-09-20 ValidFAA registration status code V: Valid registration. All codes
N30148 Cessna
177
Fixed-wing, single engine Co-owned owner
Washington
Standard 2016-09-20 ValidFAA registration status code V: Valid registration. All codes
N53901 Bellanca
7GCBC
Fixed-wing, single engine Aero Flight Dynamics LLC
Riverside, California
Standard 2016-09-20 ValidFAA registration status code V: Valid registration. All codes
N62072 Grumman American Avn. Corp.
AA-5A
Fixed-wing, single engine Individual owner
New Hampshire
Standard 2016-09-20 ValidFAA registration status code V: Valid registration. All codes
N3619K Piper
PA-28-140
Fixed-wing, single engine Individual owner
Idaho
Standard 2016-09-19 ValidFAA registration status code V: Valid registration. All codes
N62690 Cessna
172P
Fixed-wing, single engine Aerosim Academy INC
Sanford, Florida
Standard 2016-09-19 ValidFAA registration status code V: Valid registration. All codes
N64421 Cessna
172P
Fixed-wing, single engine Celtic Flight LLC
Lewes, Delaware
Standard 2016-09-19 ValidFAA registration status code V: Valid registration. All codes
N9636L Grumman American Avn. Corp.
AA-5
Fixed-wing, single engine West Main Auto Sales INC
Tupelo, Mississippi
Standard 2016-09-19 ValidFAA registration status code V: Valid registration. All codes
N3BY Cessna
172K
Fixed-wing, single engine Individual owner
California
Standard 2016-09-16 ValidFAA registration status code V: Valid registration. All codes
N40787 Piper
PA-28-140
Fixed-wing, single engine Individual owner
California
Standard 2016-09-16 ValidFAA registration status code V: Valid registration. All codes
N5363K Cessna
172P
Fixed-wing, single engine Mission Aviation Training Academy
Arlington, Washington
Standard 2016-09-16 ValidFAA registration status code V: Valid registration. All codes
N26349 Grumman American Avn. Corp.
AA-5A
Fixed-wing, single engine Individual owner
Texas
Standard 2016-09-15 ValidFAA registration status code V: Valid registration. All codes
N2950G Piper
PA-28-161
Fixed-wing, single engine Lcc East LLC
Freehold, New Jersey
Standard 2016-09-15 ValidFAA registration status code V: Valid registration. All codes
N801MZ Caretti Richard
RV-4
Fixed-wing, single engine Individual owner
Missouri
Experimental 2016-09-15 ValidFAA registration status code V: Valid registration. All codes
N83464 Piper
PA-18-150
Fixed-wing, single engine Individual owner
Texas
Multiple 2016-09-15 ValidFAA registration status code V: Valid registration. All codes
N89878 Cessna
172P
Fixed-wing, single engine Individual owner
Arizona
Standard 2016-09-15 ValidFAA registration status code V: Valid registration. All codes
N245Q Piper
PA-28-140
Fixed-wing, single engine Individual owner
Texas
Standard 2016-09-14 ValidFAA registration status code V: Valid registration. All codes
N40552 Piper
PA-18-150
Fixed-wing, single engine Individual owner
Texas
Standard 2016-09-14 ValidFAA registration status code V: Valid registration. All codes
N954T Piper
PA-18-150
Fixed-wing, single engine Gm Aviation LLC
Phillips, Wisconsin
Multiple 2016-09-14 ValidFAA registration status code V: Valid registration. All codes
N955CC Cessna
172K
Fixed-wing, single engine N955Cc LLC
Estero, Florida
Standard 2016-09-14 ValidFAA registration status code V: Valid registration. All codes
N47837 Piper
PA-28-161
Fixed-wing, single engine Co-owned owner
Iowa
Standard 2016-09-13 ValidFAA registration status code V: Valid registration. All codes
N26AK Piper
PA-18-150
Fixed-wing, single engine Co-owned owner
Alaska
Standard 2016-09-12 ValidFAA registration status code V: Valid registration. All codes
N4146X Aero Commander
100
Fixed-wing, single engine Individual owner
Ohio
Standard 2016-09-12 ValidFAA registration status code V: Valid registration. All codes
N173PW American Champion Aircraft
7GCBC
Fixed-wing, single engine Sunspot Meadow LLC
Cloudcroft, New Mexico
Standard 2016-09-09 ValidFAA registration status code V: Valid registration. All codes
N5043R Cessna
172M
Fixed-wing, single engine Withheld at owner's request
Standard 2016-09-09 ValidFAA registration status code V: Valid registration. All codes
N3533Z Piper
PA-22-150
Fixed-wing, single engine Individual owner
Nebraska
Standard 2016-09-08 ValidFAA registration status code V: Valid registration. All codes
N8135P Piper
PA-28-161
Fixed-wing, single engine Individual owner
Florida
Standard 2016-09-08 ValidFAA registration status code V: Valid registration. All codes
N1814V Cessna
172M
Fixed-wing, single engine Beyer Leasing CO
Paw Paw, Michigan
Standard 2016-09-07 ValidFAA registration status code V: Valid registration. All codes
N3473E Piper
PA-18A 150
Fixed-wing, single engine Venture North Aviation LLC
Cloquet, Minnesota
Standard 2016-09-07 ValidFAA registration status code V: Valid registration. All codes
N5385D Cessna
172N
Fixed-wing, single engine Dg Aviation Services INC
Merritt Island, Florida
Standard 2016-09-07 ValidFAA registration status code V: Valid registration. All codes
N739LU Cessna
172N
Fixed-wing, single engine Bergstrom Aircraft INC
Pasco, Washington
Standard 2016-09-07 ValidFAA registration status code V: Valid registration. All codes
N84369 Cessna
172K
Fixed-wing, single engine Individual owner
Kansas
Standard 2016-09-07 ValidFAA registration status code V: Valid registration. All codes
N246HN Newberry Harry R
RV-4
Fixed-wing, single engine Co-owned owner
Texas
Experimental 2016-09-06 ValidFAA registration status code V: Valid registration. All codes
N3437T Cessna
177
Fixed-wing, single engine Individual owner
Missouri
Standard 2016-09-06 ValidFAA registration status code V: Valid registration. All codes
N2334H Piper
PA-18-150
Fixed-wing, single engine Fff Air LLC
Ashland, Ohio
Standard 2016-09-02 ValidFAA registration status code V: Valid registration. All codes
N4359Q Cessna
172L
Fixed-wing, single engine Co-owned owner
Tennessee
Standard 2016-09-02 ValidFAA registration status code V: Valid registration. All codes
N5799D Piper
PA-22-150
Fixed-wing, single engine Individual owner
Illinois
Standard 2016-09-02 ValidFAA registration status code V: Valid registration. All codes
N9518W Piper
PA-28-140
Fixed-wing, single engine Individual owner
Wisconsin
Standard 2016-09-02 ValidFAA registration status code V: Valid registration. All codes
N13346 Cessna
172M
Fixed-wing, single engine Stafford Cessna 13346 An LLC
Lafayette, Louisiana
Standard 2016-09-01 ValidFAA registration status code V: Valid registration. All codes
N575PA Piper
PA-28-140
Fixed-wing, single engine Grw Air Services LLC
Springport, Indiana
Standard 2016-09-01 ValidFAA registration status code V: Valid registration. All codes
N8459L Cessna
172I
Fixed-wing, single engine Individual owner
Alabama
Standard 2016-09-01 ValidFAA registration status code V: Valid registration. All codes
N292CA Cessna
172M
Fixed-wing, single engine Choice Aviation LLC
Hamilton, Montana
Standard 2016-08-31 ValidFAA registration status code V: Valid registration. All codes
N738VC Cessna
172N
Fixed-wing, single engine Individual owner
Georgia
Standard 2016-08-31 ValidFAA registration status code V: Valid registration. All codes
N8025E Cessna
172N
Fixed-wing, single engine Mission Aviation Fellowship
Nampa, Idaho
Standard 2016-08-31 ValidFAA registration status code V: Valid registration. All codes
N8288Z Piper
PA-28-161
Fixed-wing, single engine Co-owned owner
California
Standard 2016-08-31 ValidFAA registration status code V: Valid registration. All codes
N8292D Piper
PA-28-161
Fixed-wing, single engine Individual owner
Texas
Standard 2016-08-31 ValidFAA registration status code V: Valid registration. All codes
N19702 Cessna
172L
Fixed-wing, single engine Dosair INC
Slatington, Pennsylvania
Standard 2016-08-30 ValidFAA registration status code V: Valid registration. All codes
N2314E Cessna
172N
Fixed-wing, single engine Airgo INC
Centralia, Illinois
Standard 2016-08-30 ValidFAA registration status code V: Valid registration. All codes
N3048P Piper
PA-23
Fixed-wing, multi-engine Individual owner
Arizona
Standard 2016-08-30 ValidFAA registration status code V: Valid registration. All codes
N3343Q Piper
PA-28-161
Fixed-wing, single engine Individual owner
Colorado
Standard 2016-08-30 ValidFAA registration status code V: Valid registration. All codes
N36JC Cessna
172M
Fixed-wing, single engine Safety In Motion Flight Center INC
Puyallup, Washington
Standard 2016-08-30 ValidFAA registration status code V: Valid registration. All codes
N666DD Laubach Michael J
DD3
Fixed-wing, single engine Individual owner
Nevada
Experimental 2016-08-30 ValidFAA registration status code V: Valid registration. All codes
N830P Piper
PA-28-140
Fixed-wing, single engine Individual owner
Florida
Standard 2016-08-30 ValidFAA registration status code V: Valid registration. All codes
N8810N Piper
PA-28-140
Fixed-wing, single engine Co-owned owner
California
Standard 2016-08-30 ValidFAA registration status code V: Valid registration. All codes
N88165 Bellanca
7GCBC
Fixed-wing, single engine Individual owner
California
Standard 2016-08-30 ValidFAA registration status code V: Valid registration. All codes
N9897Q Cessna
172M
Fixed-wing, single engine Above All Aviation INC
Santa Barbara, California
Standard 2016-08-30 ValidFAA registration status code V: Valid registration. All codes
N2924X Cessna
177
Fixed-wing, single engine Individual owner
Iowa
Standard 2016-08-29 ValidFAA registration status code V: Valid registration. All codes
N29362 Cessna
177
Fixed-wing, single engine Withheld at owner's request
Standard 2016-08-29 ValidFAA registration status code V: Valid registration. All codes
N2936M Piper
PA-12
Fixed-wing, single engine Individual owner
Idaho
Multiple 2016-08-29 ValidFAA registration status code V: Valid registration. All codes
N38195 Piper
PA-28-161
Fixed-wing, single engine Inspiration Aviation Ministries
Waterville, Maine
Standard 2016-08-29 ValidFAA registration status code V: Valid registration. All codes
N427KS Scurlock John H
VANS ACFT RV-6
Fixed-wing, single engine Jagged Ridge Imaging LLC
Bainbridge Island, Washington
Experimental 2016-08-29 ValidFAA registration status code V: Valid registration. All codes
N511GL Great Lakes
2T-1A-1
Fixed-wing, single engine Individual owner
Idaho
Standard 2016-08-29 ValidFAA registration status code V: Valid registration. All codes
N51AA Interstate
S-1B2
Fixed-wing, single engine Co-owned owner
Alaska
Standard 2016-08-29 ValidFAA registration status code V: Valid registration. All codes
N5294X Stoddard Hamilton Aircraft Inc
GLASAIR II S
Fixed-wing, single engine Individual owner
Minnesota
Experimental 2016-08-29 ValidFAA registration status code V: Valid registration. All codes
N549RV Anderson Michael D
VANS RV7A
Fixed-wing, single engine Individual owner
Texas
Experimental 2016-08-29 ValidFAA registration status code V: Valid registration. All codes
N7111D Piper
PA-22-150
Fixed-wing, single engine Individual owner
New Jersey
Standard 2016-08-29 ValidFAA registration status code V: Valid registration. All codes
N75612 Cessna
172N
Fixed-wing, single engine Individual owner
Maryland
Standard 2016-08-29 ValidFAA registration status code V: Valid registration. All codes
N9829J Cessna
172N
Fixed-wing, single engine Inflight CORP
Chaffee, Missouri
Standard 2016-08-29 ValidFAA registration status code V: Valid registration. All codes
N459AC American Champion Aircraft
7GCAA
Fixed-wing, single engine Co-owned owner
Illinois
Standard 2016-08-26 ValidFAA registration status code V: Valid registration. All codes
N5580W Piper
PA-28-150
Fixed-wing, single engine Smitty 172 LLC
Rockford, Michigan
Standard 2016-08-26 ValidFAA registration status code V: Valid registration. All codes
N124TT Tranbarger Thomas P
RV-4
Fixed-wing, single engine Sky West Aviation INC Trustee
Albuquerque, New Mexico
Experimental 2016-08-25 ValidFAA registration status code V: Valid registration. All codes
N153RE Ream Robert E
RV-6A
Fixed-wing, single engine Individual owner
Texas
Experimental 2016-08-25 ValidFAA registration status code V: Valid registration. All codes
N3274Z Piper
PA-22-150
Fixed-wing, single engine Individual owner
Wisconsin
Standard 2016-08-25 ValidFAA registration status code V: Valid registration. All codes
N390MF Omf
OMF-100-160
Fixed-wing, single engine Individual owner
Washington
Standard 2016-08-25 ValidFAA registration status code V: Valid registration. All codes
N5484D Cessna
172N
Fixed-wing, single engine Aerobiz LLC
Lewes, Delaware
Standard 2016-08-25 ValidFAA registration status code V: Valid registration. All codes
N6459W Piper
PA-28-140
Fixed-wing, single engine Individual owner
Texas
Standard 2016-08-25 ValidFAA registration status code V: Valid registration. All codes
N7099C Piper
PA-28-151
Fixed-wing, single engine Individual owner
Minnesota
Standard 2016-08-25 ValidFAA registration status code V: Valid registration. All codes
N6003W Piper
PA-28-140
Fixed-wing, single engine Co-owned owner
New York
Standard 2016-08-24 ValidFAA registration status code V: Valid registration. All codes
N6449J Cessna
172N
Fixed-wing, single engine Bentley Aviation Services
Lewes, Delaware
Standard 2016-08-24 ValidFAA registration status code V: Valid registration. All codes
N658FL Piper
PA-28-140
Fixed-wing, single engine Individual owner
Arkansas
Standard 2016-08-24 ValidFAA registration status code V: Valid registration. All codes
N6822L Piper
PA-18-150
Fixed-wing, single engine Individual owner
Alaska
Standard 2016-08-24 ValidFAA registration status code V: Valid registration. All codes
N886RV Wilhelm Leonard
RV6A
Fixed-wing, single engine Individual owner
Virginia
Experimental 2016-08-24 ValidFAA registration status code V: Valid registration. All codes
N915RS American Champion Aircraft
7GCBC
Fixed-wing, single engine Individual owner
Pennsylvania
Standard 2016-08-24 ValidFAA registration status code V: Valid registration. All codes
N29651 Cessna
177
Fixed-wing, single engine Individual owner
Indiana
Standard 2016-08-23 ValidFAA registration status code V: Valid registration. All codes
N4649Q Cessna
172M
Fixed-wing, single engine Skyhawk Services LLC
Lake Wales, Florida
Standard 2016-08-23 ValidFAA registration status code V: Valid registration. All codes
N5DD Mccormick
PITTS S1
Fixed-wing, single engine Individual owner
Arizona
Experimental 2016-08-23 ValidFAA registration status code V: Valid registration. All codes
N733WS Cessna
172N
Fixed-wing, single engine Airgo INC
Centralia, Illinois
Standard 2016-08-23 ValidFAA registration status code V: Valid registration. All codes
N4708A Piper
PA-18-150
Fixed-wing, single engine Individual owner
Washington
Standard 2016-08-22 ValidFAA registration status code V: Valid registration. All codes
N53182 Cessna
172P
Fixed-wing, single engine Individual owner
New Mexico
Standard 2016-08-22 ValidFAA registration status code V: Valid registration. All codes
N54734 Cessna
172P
Fixed-wing, single engine Southern Arkansas University Tech
Camden, Arkansas
Standard 2016-08-22 ValidFAA registration status code V: Valid registration. All codes
N6395D Cessna
172N
Fixed-wing, single engine Individual owner
Virginia
Standard 2016-08-22 ValidFAA registration status code V: Valid registration. All codes
N8524Y Piper
PA-18-150
Fixed-wing, single engine Individual owner
Texas
Standard 2016-08-22 ValidFAA registration status code V: Valid registration. All codes
N2856P Piper
PA-22
Fixed-wing, single engine Individual owner
Washington
Standard 2016-08-19 ValidFAA registration status code V: Valid registration. All codes
N347DM Mader David
RV6-A
Fixed-wing, single engine Individual owner
Alabama
Experimental 2016-08-19 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.