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
N3960M Piper
PA-12
Fixed-wing, single engine Co-owned owner
Oregon
Standard 2023-04-19 ValidFAA registration status code V: Valid registration. All codes
N46154 Cessna
172I
Fixed-wing, single engine Individual owner
Alabama
Standard 2023-04-19 ValidFAA registration status code V: Valid registration. All codes
N5264D Cessna
172N
Fixed-wing, single engine Individual owner
New Jersey
Standard 2023-04-19 ValidFAA registration status code V: Valid registration. All codes
N5284E Cessna
172N
Fixed-wing, single engine Individual owner
South Dakota
Standard 2023-04-19 ValidFAA registration status code V: Valid registration. All codes
N5450H Cessna
172M
Fixed-wing, single engine Lima-001 LLC
Muscatine, Iowa
Standard 2023-04-19 ValidFAA registration status code V: Valid registration. All codes
N58GM Malone Franklin
GLASAIR-MALONE
Fixed-wing, single engine Individual owner
Minnesota
Experimental 2023-04-19 ValidFAA registration status code V: Valid registration. All codes
N6521W Piper
PA-28-140
Fixed-wing, single engine Individual owner
Oklahoma
Standard 2023-04-19 ValidFAA registration status code V: Valid registration. All codes
N6673W Piper
PA-28-140
Fixed-wing, single engine Ck Nickels INC
Muleshoe, Texas
Standard 2023-04-19 ValidFAA registration status code V: Valid registration. All codes
N7146Q Cessna
172L
Fixed-wing, single engine Pressley Aviation LLC
New London, North Carolina
Standard 2023-04-19 ValidFAA registration status code V: Valid registration. All codes
N75778 Cessna
172N
Fixed-wing, single engine Lima-001 LLC
Muscatine, Iowa
Standard 2023-04-19 ValidFAA registration status code V: Valid registration. All codes
N7990W Piper
PA-28-180
Fixed-wing, single engine Jdc Aviation LLC
Upland, California
Standard 2023-04-19 ValidFAA registration status code V: Valid registration. All codes
N8156D Piper
PA-22-160
Fixed-wing, single engine Individual owner
Alaska
Standard 2023-04-19 ValidFAA registration status code V: Valid registration. All codes
N82731 Piper
PA-18-150
Fixed-wing, single engine Individual owner
Colorado
Standard 2023-04-19 ValidFAA registration status code V: Valid registration. All codes
N9029Y Piper
PA-18-150
Fixed-wing, single engine Individual owner
Michigan
Experimental 2023-04-19 ValidFAA registration status code V: Valid registration. All codes
N9263H Cessna
172M
Fixed-wing, single engine Pj Aviation Holding LLC Trustee
Eden Prairie, Minnesota
Standard 2023-04-19 ValidFAA registration status code V: Valid registration. All codes
N9400H Cessna
172M
Fixed-wing, single engine Individual owner
Kentucky
Standard 2023-04-19 ValidFAA registration status code V: Valid registration. All codes
N9712N Champion
7KCAB
Fixed-wing, single engine Individual owner
Indiana
Standard 2023-04-19 ValidFAA registration status code V: Valid registration. All codes
N131KY Gulfstream American Corp
AA-5A
Fixed-wing, single engine Individual owner
Kentucky
Standard 2023-04-18 ValidFAA registration status code V: Valid registration. All codes
N172TS Cessna
172M
Fixed-wing, single engine Vero Technical Support INC
Pensacola, Florida
Standard 2023-04-18 ValidFAA registration status code V: Valid registration. All codes
N21P Piper
PA-22-160
Fixed-wing, single engine Individual owner
Texas
Standard 2023-04-18 ValidFAA registration status code V: Valid registration. All codes
N2393L Beech
23
Fixed-wing, single engine Individual owner
Missouri
Standard 2023-04-18 ValidFAA registration status code V: Valid registration. All codes
N26240 Grumman American Avn. Corp.
AA-5A
Fixed-wing, single engine Individual owner
Louisiana
Standard 2023-04-18 ValidFAA registration status code V: Valid registration. All codes
N2935Z Piper
PA-22-150
Fixed-wing, single engine Individual owner
Wisconsin
Standard 2023-04-18 ValidFAA registration status code V: Valid registration. All codes
N3955P Piper
PA-22-150
Fixed-wing, single engine Bent Prop Club LLC
Waverly, Iowa
Standard 2023-04-18 ValidFAA registration status code V: Valid registration. All codes
N40286 Grote Warren H
GROTE RV-6A
Fixed-wing, single engine Dwm55 LLC
Kalispell, Montana
Experimental 2023-04-18 ValidFAA registration status code V: Valid registration. All codes
N4134J Piper
PA-28-140
Fixed-wing, single engine Priebe Aviation LLC
Waseca, Minnesota
Standard 2023-04-18 ValidFAA registration status code V: Valid registration. All codes
N462FL Piper
PA-28-140
Fixed-wing, single engine Individual owner
North Carolina
Standard 2023-04-18 ValidFAA registration status code V: Valid registration. All codes
N5065W Piper
PA-28-160
Fixed-wing, single engine Individual owner
Ohio
Standard 2023-04-18 ValidFAA registration status code V: Valid registration. All codes
N55525 Piper
PA-28-140
Fixed-wing, single engine Individual owner
California
Standard 2023-04-18 ValidFAA registration status code V: Valid registration. All codes
N6407R Piper
PA-28-140
Fixed-wing, single engine Individual owner
Wisconsin
Standard 2023-04-18 ValidFAA registration status code V: Valid registration. All codes
N655S Universal
GLOBE GC-1B
Fixed-wing, single engine Individual owner
Oregon
Standard 2023-04-18 ValidFAA registration status code V: Valid registration. All codes
N719AC American Champion Aircraft
7GCBC
Fixed-wing, single engine Zing Aviation and Marine LLC
Edgewater, Florida
Standard 2023-04-18 ValidFAA registration status code V: Valid registration. All codes
N828JP Piper
PA-18-150
Fixed-wing, single engine Individual owner
Tennessee
Standard 2023-04-18 ValidFAA registration status code V: Valid registration. All codes
N8670C Piper
PA-18-150
Fixed-wing, single engine Individual owner
Wisconsin
Multiple 2023-04-18 ValidFAA registration status code V: Valid registration. All codes
N8862Y Piper
PA-18-150
Fixed-wing, single engine State of Montana
Helena, Montana
Standard 2023-04-18 ValidFAA registration status code V: Valid registration. All codes
N9919Q Cessna
172M
Fixed-wing, single engine Individual owner
Wisconsin
Standard 2023-04-18 ValidFAA registration status code V: Valid registration. All codes
N9GD Davis
PITTS S-1
Fixed-wing, single engine Individual owner
Iowa
Experimental 2023-04-18 ValidFAA registration status code V: Valid registration. All codes
N144LL Lechner Larry A
VANS ACFT RV-4
Fixed-wing, single engine Individual owner
New York
Experimental 2023-04-17 ValidFAA registration status code V: Valid registration. All codes
N19789 Cessna
172L
Fixed-wing, single engine Co-owned owner
Minnesota
Standard 2023-04-17 ValidFAA registration status code V: Valid registration. All codes
N3977Q Cessna
172L
Fixed-wing, single engine Individual owner
New York
Standard 2023-04-17 ValidFAA registration status code V: Valid registration. All codes
N4304Q Cessna
172L
Fixed-wing, single engine Professional Aviation INC
Dalton, Georgia
Standard 2023-04-17 ValidFAA registration status code V: Valid registration. All codes
N61841 Cessna
172M
Fixed-wing, single engine Individual owner
Minnesota
Standard 2023-04-17 ValidFAA registration status code V: Valid registration. All codes
N633C Piper
PA-28-140
Fixed-wing, single engine Individual owner
North Carolina
Standard 2023-04-17 ValidFAA registration status code V: Valid registration. All codes
N63837 Piper
PA-18-150
Fixed-wing, single engine Co-owned owner
Minnesota
Standard 2023-04-17 ValidFAA registration status code V: Valid registration. All codes
N703CB Piper
PA-18-150
Fixed-wing, single engine Individual owner
Vermont
Standard 2023-04-17 ValidFAA registration status code V: Valid registration. All codes
N7087R Piper
PA-28-140
Fixed-wing, single engine Individual owner
Tennessee
Standard 2023-04-17 ValidFAA registration status code V: Valid registration. All codes
N8953D Piper
PA-22-160
Fixed-wing, single engine Vassal Ministries
North Pole, Alaska
Standard 2023-04-17 ValidFAA registration status code V: Valid registration. All codes
N9351H Cessna
172M
Fixed-wing, single engine Individual owner
Utah
Standard 2023-04-17 ValidFAA registration status code V: Valid registration. All codes
N95225 Piper
PA-28-140
Fixed-wing, single engine Cherokee 95225 LLC
Provo, Utah
Standard 2023-04-17 ValidFAA registration status code V: Valid registration. All codes
N40575 Piper
PA-18-150
Fixed-wing, single engine Individual owner
Mississippi
Standard 2023-04-15 ValidFAA registration status code V: Valid registration. All codes
N4420J Piper
PA-28-140
Fixed-wing, single engine Silver Wings Aviation LLC
El Paso, Texas
Standard 2023-04-15 ValidFAA registration status code V: Valid registration. All codes
N61891 Cessna
172M
Fixed-wing, single engine Individual owner
Washington
Standard 2023-04-15 ValidFAA registration status code V: Valid registration. All codes
N6983B Piper
PA-18A 150
Fixed-wing, single engine Individual owner
Louisiana
Multiple 2023-04-15 ValidFAA registration status code V: Valid registration. All codes
N9116D Piper
PA-18A 150
Fixed-wing, single engine Individual owner
Alaska
Standard 2023-04-15 ValidFAA registration status code V: Valid registration. All codes
N96503 Cessna
172P
Fixed-wing, single engine Co-owned owner
Utah
Standard 2023-04-15 ValidFAA registration status code V: Valid registration. All codes
N12750 Cessna
172M
Fixed-wing, single engine Crosby Flying Services LLC
Fort Worth, Texas
Standard 2023-04-14 ValidFAA registration status code V: Valid registration. All codes
N172CH Cessna
172L
Fixed-wing, single engine Crosby Flying Services LLC
Fort Worth, Texas
Standard 2023-04-14 ValidFAA registration status code V: Valid registration. All codes
N1766V Cessna
172M
Fixed-wing, single engine Code4 Ventures INC DBA
Waynesboro, Virginia
Standard 2023-04-14 ValidFAA registration status code V: Valid registration. All codes
N19868 Cessna
172M
Fixed-wing, single engine Code4 Ventures INC DBA
Waynesboro, Virginia
Standard 2023-04-14 ValidFAA registration status code V: Valid registration. All codes
N4653R Piper
PA-28-140
Fixed-wing, single engine Elite Fleet Jacksonville LLC
Jacksonville, Florida
Standard 2023-04-14 ValidFAA registration status code V: Valid registration. All codes
N4739J Cessna
172N
Fixed-wing, single engine Vero Technical Support INC
Pensacola, Florida
Standard 2023-04-14 ValidFAA registration status code V: Valid registration. All codes
N55498 Piper
PA-28-140
Fixed-wing, single engine Individual owner
Texas
Standard 2023-04-14 ValidFAA registration status code V: Valid registration. All codes
N5918W Piper
PA-28-160
Fixed-wing, single engine Individual owner
Washington
Standard 2023-04-14 ValidFAA registration status code V: Valid registration. All codes
N8142D Piper
PA-22-160
Fixed-wing, single engine Co-owned owner
Nevada
Standard 2023-04-14 ValidFAA registration status code V: Valid registration. All codes
N1353U Cessna
172M
Fixed-wing, single engine Individual owner
Texas
Standard 2023-04-13 ValidFAA registration status code V: Valid registration. All codes
N1571V Cessna
172M
Fixed-wing, single engine Individual owner
Alabama
Standard 2023-04-13 ValidFAA registration status code V: Valid registration. All codes
N1776J Piper
PA-28-140
Fixed-wing, single engine Individual owner
Arizona
Standard 2023-04-13 ValidFAA registration status code V: Valid registration. All codes
N281PC American Champion Aircraft
7GCBC
Fixed-wing, single engine Individual owner
Missouri
Standard 2023-04-13 ValidFAA registration status code V: Valid registration. All codes
N303MW Michael Woolworth
VANS RV-9A
Fixed-wing, single engine Access Realty LLC
Arvada, Colorado
Experimental 2023-04-13 ValidFAA registration status code V: Valid registration. All codes
N4210Q Cessna
172L
Fixed-wing, single engine Individual owner
Oklahoma
Standard 2023-04-13 ValidFAA registration status code V: Valid registration. All codes
N428DM Downing Charles E
GLASAIR FT
Fixed-wing, single engine Individual owner
Colorado
Experimental 2023-04-13 ValidFAA registration status code V: Valid registration. All codes
N8457D Piper
PA-22-160
Fixed-wing, single engine Individual owner
Texas
Standard 2023-04-13 ValidFAA registration status code V: Valid registration. All codes
N9162H Cessna
172M
Fixed-wing, single engine Stratus Aviation LLC DBA
Vacaville, California
Standard 2023-04-13 ValidFAA registration status code V: Valid registration. All codes
N234RA American Champion Aircraft
7GCBC
Fixed-wing, single engine Tom Eaton Consulting LLC
West Sacramento, California
Standard 2023-04-12 ValidFAA registration status code V: Valid registration. All codes
N2592P Piper
PA-18A 150
Fixed-wing, single engine Individual owner
Alaska
Standard 2023-04-12 ValidFAA registration status code V: Valid registration. All codes
N328DD Cessna
172M
Fixed-wing, single engine Landsburg Custom Services LLC
Sandusky, Michigan
Standard 2023-04-12 ValidFAA registration status code V: Valid registration. All codes
N3635Z Piper
PA-22-160
Fixed-wing, single engine Individual owner
New York
Standard 2023-04-12 ValidFAA registration status code V: Valid registration. All codes
N46DH Ross - Herbert
RV-3
Fixed-wing, single engine Individual owner
Illinois
Experimental 2023-04-12 ValidFAA registration status code V: Valid registration. All codes
N5539F Piper
PA-28-140
Fixed-wing, single engine Aeronautical Technical Service INC
Collierville, Tennessee
Standard 2023-04-12 ValidFAA registration status code V: Valid registration. All codes
N5761F Piper
PA-28-140
Fixed-wing, single engine Individual owner
Florida
Standard 2023-04-12 ValidFAA registration status code V: Valid registration. All codes
N73434 Cessna
172M
Fixed-wing, single engine Individual owner
Alaska
Standard 2023-04-12 ValidFAA registration status code V: Valid registration. All codes
N734MJ Cessna
172N
Fixed-wing, single engine Add Ventures Holdings LLC
Puyallup, Washington
Standard 2023-04-12 ValidFAA registration status code V: Valid registration. All codes
N738FC Cessna
172N
Fixed-wing, single engine Individual owner
California
Standard 2023-04-12 ValidFAA registration status code V: Valid registration. All codes
N806DA Cessna
172N
Fixed-wing, single engine Peak Leasing LLC
Anchorage, Alaska
Standard 2023-04-12 ValidFAA registration status code V: Valid registration. All codes
N8315R Robinson Helicopter
R22 BETA
Helicopter Jnl Aviation LLC
Orlando, Florida
Standard 2023-04-12 ValidFAA registration status code V: Valid registration. All codes
N9727W Piper
PA-28-140
Fixed-wing, single engine Co-owned owner
Illinois
Standard 2023-04-12 ValidFAA registration status code V: Valid registration. All codes
N3950Q Cessna
172L
Fixed-wing, single engine Co-owned owner
Virginia
Standard 2023-04-11 ValidFAA registration status code V: Valid registration. All codes
N4353A Piper
PA-22-150
Fixed-wing, single engine Individual owner
Florida
Standard 2023-04-11 ValidFAA registration status code V: Valid registration. All codes
N5468H Cessna
172M
Fixed-wing, single engine Prjc Properties LLC
Vonore, Tennessee
Standard 2023-04-11 ValidFAA registration status code V: Valid registration. All codes
N67022 Cessna
172K
Fixed-wing, single engine Individual owner
Pennsylvania
Standard 2023-04-11 ValidFAA registration status code V: Valid registration. All codes
N6774W Piper
PA-28-140
Fixed-wing, single engine 10-4 Aviation LLC
Waco, Texas
Standard 2023-04-11 ValidFAA registration status code V: Valid registration. All codes
N874SC Piper
PA-18-150
Fixed-wing, single engine Individual owner
Idaho
Restricted 2023-04-11 ValidFAA registration status code V: Valid registration. All codes
N9675P Piper
PA-18-150
Fixed-wing, single engine Co-owned owner
Alaska
Multiple 2023-04-11 ValidFAA registration status code V: Valid registration. All codes
N20213 Cessna
172M
Fixed-wing, single engine Valiair Limited Company Trustee
Casper, Wyoming
Standard 2023-04-10 ValidFAA registration status code V: Valid registration. All codes
N321PA Cessna
172L
Fixed-wing, single engine Fosston Flying Club INC
Fosston, Minnesota
Restricted 2023-04-10 ValidFAA registration status code V: Valid registration. All codes
N47490 Piper
PA-28-161
Fixed-wing, single engine Atd Flight Systems LLC
Kansas City, Missouri
Standard 2023-04-10 ValidFAA registration status code V: Valid registration. All codes
N8073D Piper
PA-18A
Fixed-wing, single engine Individual owner
Alaska
Standard 2023-04-10 ValidFAA registration status code V: Valid registration. All codes
N84870 Cessna
172K
Fixed-wing, single engine Co-owned owner
Texas
Standard 2023-04-10 ValidFAA registration status code V: Valid registration. All codes
N1450V Cessna
172M
Fixed-wing, single engine Decollage LLC
Flagstaff, Arizona
Standard 2023-04-08 ValidFAA registration status code V: Valid registration. All codes
N29474 Cessna
177
Fixed-wing, single engine Individual owner
Ohio
Standard 2023-04-08 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.