The U.S. aircraft register, updated daily
Engines · piston (reciprocating) · data as of October 8, 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
N15617 Piper
PA-28-140
Fixed-wing, single engine Individual owner
Kansas
Standard 2024-08-14 ValidFAA registration status code V: Valid registration. All codes
N1717E Cessna
172N
Fixed-wing, single engine N2893E LLC
Reno, Nevada
Standard 2024-08-14 ValidFAA registration status code V: Valid registration. All codes
N212TM Cessna
177
Fixed-wing, single engine Individual owner
Arkansas
Standard 2024-08-14 ValidFAA registration status code V: Valid registration. All codes
N4216Z Piper
PA-18-150
Fixed-wing, single engine Co-owned owner
Alaska
Standard 2024-08-14 ValidFAA registration status code V: Valid registration. All codes
N4394F Piper
PA-28-151
Fixed-wing, single engine Pacific Piper LLC
Washougal, Washington
Standard 2024-08-14 ValidFAA registration status code V: Valid registration. All codes
N7074R Piper
PA-28-140
Fixed-wing, single engine Cl Finney Aviation LLC
Benton, Kansas
Standard 2024-08-14 ValidFAA registration status code V: Valid registration. All codes
N7131B Piper
PA-22-150
Fixed-wing, single engine Individual owner
Arizona
Standard 2024-08-14 ValidFAA registration status code V: Valid registration. All codes
N80866 Cessna
172M
Fixed-wing, single engine Individual owner
New Mexico
Standard 2024-08-14 ValidFAA registration status code V: Valid registration. All codes
N810SU Cessna
172N
Fixed-wing, single engine Apm Leasing LLC
Casper, Wyoming
Standard 2024-08-14 ValidFAA registration status code V: Valid registration. All codes
N8281N Piper
PA-28-140
Fixed-wing, single engine Individual owner
Texas
Standard 2024-08-14 ValidFAA registration status code V: Valid registration. All codes
N9723H Cessna
172M
Fixed-wing, single engine Flying Tigers Flight School LLC
Houston, Texas
Standard 2024-08-14 ValidFAA registration status code V: Valid registration. All codes
N97LW Adkins Clint R
VANS RV-4
Fixed-wing, single engine Individual owner
Montana
Experimental 2024-08-14 ValidFAA registration status code V: Valid registration. All codes
N252ER Cessna
172N
Fixed-wing, single engine Beaurayne Holdings LLC
Prairieville, Louisiana
Standard 2024-08-13 ValidFAA registration status code V: Valid registration. All codes
N425AJ Piper
PA-28-140
Fixed-wing, single engine Somnium Consulting Services LLC
Pensacola, Florida
Standard 2024-08-13 ValidFAA registration status code V: Valid registration. All codes
N4349Y Piper
PA-28-161
Fixed-wing, single engine Co-owned owner
West Virginia
Standard 2024-08-13 ValidFAA registration status code V: Valid registration. All codes
N5178H Piper
PA-14
Fixed-wing, single engine Individual owner
Alaska
Standard 2024-08-13 ValidFAA registration status code V: Valid registration. All codes
N618MN Cessna
172N
Fixed-wing, single engine Co-owned owner
New Mexico
Standard 2024-08-13 ValidFAA registration status code V: Valid registration. All codes
N7137L Grumman American Avn. Corp.
AA-5
Fixed-wing, single engine Co-owned owner
Washington
Standard 2024-08-13 ValidFAA registration status code V: Valid registration. All codes
N737WX Cessna
172N
Fixed-wing, single engine Whorton Aviation LLC
Winder, Georgia
Standard 2024-08-13 ValidFAA registration status code V: Valid registration. All codes
N9892G Cessna
172L
Fixed-wing, single engine Individual owner
New Jersey
Standard 2024-08-13 ValidFAA registration status code V: Valid registration. All codes
N139PC American Champion Aircraft
7GCBC
Fixed-wing, single engine Co-owned owner
Idaho
Standard 2024-08-12 ValidFAA registration status code V: Valid registration. All codes
N26847 Gulfstream American Corp
AA-5A
Fixed-wing, single engine Individual owner
Virginia
Standard 2024-08-12 ValidFAA registration status code V: Valid registration. All codes
N5197R Cessna
172M
Fixed-wing, single engine Media Stew LLC
Carson City, Nevada
Standard 2024-08-12 ValidFAA registration status code V: Valid registration. All codes
N5442W Piper
PA-28-160
Fixed-wing, single engine Individual owner
Texas
Standard 2024-08-12 ValidFAA registration status code V: Valid registration. All codes
N7318F Piper
PA-28-140
Fixed-wing, single engine Two Weeks LLC
East Palo Alto, California
Standard 2024-08-12 ValidFAA registration status code V: Valid registration. All codes
N22GN Piper
PA-22-150
Fixed-wing, single engine Skattum LLC
Sioux Falls, South Dakota
Standard 2024-08-11 ValidFAA registration status code V: Valid registration. All codes
N6166D Piper
PA-22-150
Fixed-wing, single engine Clb LLC
Boerne, Texas
Standard 2024-08-11 ValidFAA registration status code V: Valid registration. All codes
N82064 Piper
PA-18-150
Fixed-wing, single engine Individual owner
South Carolina
Standard 2024-08-11 ValidFAA registration status code V: Valid registration. All codes
N41214 Piper
PA-28-140
Fixed-wing, single engine Individual owner
California
Standard 2024-08-10 ValidFAA registration status code V: Valid registration. All codes
N6023D Piper
PA-22-150
Fixed-wing, single engine Individual owner
California
Standard 2024-08-10 ValidFAA registration status code V: Valid registration. All codes
N733ML Cessna
172N
Fixed-wing, single engine Individual owner
New York
Standard 2024-08-10 ValidFAA registration status code V: Valid registration. All codes
N8960C Piper
PA-18-135
Fixed-wing, single engine Individual owner
Alaska
Standard 2024-08-10 ValidFAA registration status code V: Valid registration. All codes
N95192 Piper
PA-28-140
Fixed-wing, single engine Cjr Air LLC
Stevensville, Michigan
Standard 2024-08-10 ValidFAA registration status code V: Valid registration. All codes
N3349S Cessna
172P
Fixed-wing, single engine Jin Jin Aviation LLC
Anchorage, Alaska
Standard 2024-08-09 ValidFAA registration status code V: Valid registration. All codes
N6989W Piper
PA-28-140
Fixed-wing, single engine Co-owned owner
Texas
Standard 2024-08-09 ValidFAA registration status code V: Valid registration. All codes
N737RP Cessna
172N
Fixed-wing, single engine Elevated Aviation LLC
North Charleston, South Carolina
Standard 2024-08-09 ValidFAA registration status code V: Valid registration. All codes
N8217N Piper
PA-28-140
Fixed-wing, single engine G U M P S Flying Club INC
Warner Robins, Georgia
Standard 2024-08-09 ValidFAA registration status code V: Valid registration. All codes
N137LC Collins Leland F
VANS RV9A
Fixed-wing, single engine Nine Kilo LLC
Sterling, Virginia
Experimental 2024-08-08 ValidFAA registration status code V: Valid registration. All codes
N738QB Cessna
172N
Fixed-wing, single engine Red Baron LLC
Middletown, Delaware
Standard 2024-08-08 ValidFAA registration status code V: Valid registration. All codes
N142AS Piper
PA-28-140
Fixed-wing, single engine Co-owned owner
Washington
Standard 2024-08-07 ValidFAA registration status code V: Valid registration. All codes
N33560 Piper
PA-28-140
Fixed-wing, single engine Individual owner
North Carolina
Standard 2024-08-07 ValidFAA registration status code V: Valid registration. All codes
N34WJ Slocum Donald K
VANS ACFT RV6A
Fixed-wing, single engine Individual owner
Arkansas
Experimental 2024-08-07 ValidFAA registration status code V: Valid registration. All codes
N5204M Beech
B19
Fixed-wing, single engine Individual owner
Florida
Standard 2024-08-07 ValidFAA registration status code V: Valid registration. All codes
N5295S Piper
PA-28-140
Fixed-wing, single engine Individual owner
Virginia
Standard 2024-08-07 ValidFAA registration status code V: Valid registration. All codes
N6748H Cessna
172M
Fixed-wing, single engine N6748H LLC
Palm Beach Gardens, Florida
Standard 2024-08-07 ValidFAA registration status code V: Valid registration. All codes
N921SJ Justis Elvis J
RV6
Fixed-wing, single engine Individual owner
Alabama
Experimental 2024-08-07 ValidFAA registration status code V: Valid registration. All codes
N1214U Cessna
172M
Fixed-wing, single engine Individual owner
Minnesota
Standard 2024-08-06 ValidFAA registration status code V: Valid registration. All codes
N1335R Grumman American Avn. Corp.
AA-5
Fixed-wing, single engine Individual owner
Massachusetts
Standard 2024-08-06 ValidFAA registration status code V: Valid registration. All codes
N3575L Cessna
150F
Fixed-wing, single engine Individual owner
Arizona
Standard 2024-08-06 ValidFAA registration status code V: Valid registration. All codes
N4324R Cessna
172M
Fixed-wing, single engine Individual owner
Washington
Standard 2024-08-06 ValidFAA registration status code V: Valid registration. All codes
N52749 Cessna
172P
Fixed-wing, single engine Middle Tennessee State University
Murfreesboro, Tennessee
Standard 2024-08-06 ValidFAA registration status code V: Valid registration. All codes
N9589L Grumman American Avn. Corp.
AA-5
Fixed-wing, single engine Individual owner
Alabama
Standard 2024-08-06 ValidFAA registration status code V: Valid registration. All codes
N9795W Piper
PA-28-140
Fixed-wing, single engine Individual owner
Arizona
Standard 2024-08-06 ValidFAA registration status code V: Valid registration. All codes
N3935Q Cessna
172L
Fixed-wing, single engine Beaufort Flight Training LLC
Beaufort, South Carolina
Standard 2024-08-05 ValidFAA registration status code V: Valid registration. All codes
N7903G Cessna
172L
Fixed-wing, single engine Individual owner
Colorado
Standard 2024-08-05 ValidFAA registration status code V: Valid registration. All codes
N80692 Cessna
172M
Fixed-wing, single engine Withheld at owner's request
Standard 2024-08-05 ValidFAA registration status code V: Valid registration. All codes
N8570C Piper
PA-18-135
Fixed-wing, single engine Individual owner
Alaska
Standard 2024-08-05 ValidFAA registration status code V: Valid registration. All codes
N901XZ Piper
PA-18-150
Fixed-wing, single engine Individual owner
Tennessee
Standard 2024-08-05 ValidFAA registration status code V: Valid registration. All codes
N90744 Robinson Helicopter
R22
Helicopter Central Virginia Aviation INC
North Dinwiddie, Virginia
Standard 2024-08-05 ValidFAA registration status code V: Valid registration. All codes
N6571D Cessna
172N
Fixed-wing, single engine Blazing Sun Aviation LLC
Encinitas, California
Standard 2024-08-04 ValidFAA registration status code V: Valid registration. All codes
N733GV Cessna
172N
Fixed-wing, single engine Riya Aviation LLC
Tracy, California
Standard 2024-08-04 ValidFAA registration status code V: Valid registration. All codes
N3635Q Beech
A23-19
Fixed-wing, single engine Fantini Real Estate LLC
Louisville, Kentucky
Standard 2024-08-03 ValidFAA registration status code V: Valid registration. All codes
N81016 Piper
PA-28-161
Fixed-wing, single engine Lane Community College
Eugene, Oregon
Standard 2024-08-03 ValidFAA registration status code V: Valid registration. All codes
N20521 Cessna
172M
Fixed-wing, single engine N20521 LLC
Wilmington, Delaware
Standard 2024-08-02 ValidFAA registration status code V: Valid registration. All codes
N2351B Piper
PA-28-140
Fixed-wing, single engine Withheld at owner's request
Standard 2024-08-02 ValidFAA registration status code V: Valid registration. All codes
N3730K Piper
PA-28-140
Fixed-wing, single engine Individual owner
Wisconsin
Standard 2024-08-02 ValidFAA registration status code V: Valid registration. All codes
N3944F Piper
PA-28-151
Fixed-wing, single engine Individual owner
North Carolina
Standard 2024-08-02 ValidFAA registration status code V: Valid registration. All codes
N4486J Piper
PA-28-140
Fixed-wing, single engine Co-owned owner
California
Standard 2024-08-02 ValidFAA registration status code V: Valid registration. All codes
N5426J Cessna
172N
Fixed-wing, single engine Media Stew LLC
Carson City, Nevada
Restricted 2024-08-02 ValidFAA registration status code V: Valid registration. All codes
N734GA Cessna
172N
Fixed-wing, single engine N734Ga LLC
Wilmington, Delaware
Standard 2024-08-02 ValidFAA registration status code V: Valid registration. All codes
N80213 Cessna
172M
Fixed-wing, single engine N80213 LLC
Wilmington, Delaware
Standard 2024-08-02 ValidFAA registration status code V: Valid registration. All codes
N84412 Cessna
172K
Fixed-wing, single engine Individual owner
Texas
Standard 2024-08-02 ValidFAA registration status code V: Valid registration. All codes
N9372H Cessna
172M
Fixed-wing, single engine N9372H LLC
Wilmington, Delaware
Standard 2024-08-02 ValidFAA registration status code V: Valid registration. All codes
N3104T Cessna
177
Fixed-wing, single engine Individual owner
Colorado
Standard 2024-08-01 ValidFAA registration status code V: Valid registration. All codes
N32435 Piper
PA-28-140
Fixed-wing, single engine Individual owner
Wisconsin
Standard 2024-08-01 ValidFAA registration status code V: Valid registration. All codes
N4302Y Piper
PA-23-160
Fixed-wing, multi-engine Individual owner
South Carolina
Standard 2024-08-01 ValidFAA registration status code V: Valid registration. All codes
N5158E Cessna
172N
Fixed-wing, single engine Individual owner
Texas
Standard 2024-08-01 ValidFAA registration status code V: Valid registration. All codes
N5533F Piper
PA-28-140
Fixed-wing, single engine Individual owner
Texas
Standard 2024-08-01 ValidFAA registration status code V: Valid registration. All codes
N61840 Cessna
172M
Fixed-wing, single engine Individual owner
Puerto Rico
Standard 2024-08-01 ValidFAA registration status code V: Valid registration. All codes
N618FL Piper
PA-28-140
Fixed-wing, single engine Dexter Development LLC
Kingfield, Maine
Standard 2024-08-01 ValidFAA registration status code V: Valid registration. All codes
N669KP Gulfstream American Corp
AA-5A
Fixed-wing, single engine Co-owned owner
Arizona
Standard 2024-08-01 ValidFAA registration status code V: Valid registration. All codes
N11GK Piper
PA-28-140
Fixed-wing, single engine Individual owner
North Carolina
Standard 2024-07-31 ValidFAA registration status code V: Valid registration. All codes
N244WH Hug William
RV-4
Fixed-wing, single engine Individual owner
Colorado
Experimental 2024-07-31 ValidFAA registration status code V: Valid registration. All codes
N35461 Cessna
172I
Fixed-wing, single engine
Standard 2024-07-31 ValidFAA registration status code V: Valid registration. All codes
N5609U Piper
PA-28-140
Fixed-wing, single engine Steves Landavator Service LLC
Oley, Pennsylvania
Standard 2024-07-31 ValidFAA registration status code V: Valid registration. All codes
N56324 Piper
PA-28-140
Fixed-wing, single engine Individual owner
Virginia
Standard 2024-07-31 ValidFAA registration status code V: Valid registration. All codes
N5876U Piper
PA-28-140
Fixed-wing, single engine 3Shahs Aviation LLC
Temecula, California
Standard 2024-07-31 ValidFAA registration status code V: Valid registration. All codes
N6444R Piper
PA-28-140
Fixed-wing, single engine School Board of Nassau County Fl
Fernandina Beach, Florida
Standard 2024-07-31 ValidFAA registration status code V: Valid registration. All codes
N9690U Grumman American Avn. Corp.
AA-5A
Fixed-wing, single engine Learjetjohn Flying Club LLC
Athens, Alabama
Standard 2024-07-31 ValidFAA registration status code V: Valid registration. All codes
N98298 Piper
PA-28-140
Fixed-wing, single engine Individual owner
West Virginia
Standard 2024-07-31 ValidFAA registration status code V: Valid registration. All codes
N172DV Cessna
172I
Fixed-wing, single engine Lima Tango Aviation LLC
Mount Dora, Florida
Standard 2024-07-30 ValidFAA registration status code V: Valid registration. All codes
N20176 Cessna
172M
Fixed-wing, single engine Co-owned owner
Ohio
Standard 2024-07-30 ValidFAA registration status code V: Valid registration. All codes
N2213A Piper
PA-20
Fixed-wing, single engine Individual owner
Pennsylvania
Standard 2024-07-30 ValidFAA registration status code V: Valid registration. All codes
N32514 Piper
PA-28-140
Fixed-wing, single engine Summit Flight Academy LLC
Peculiar, Missouri
Standard 2024-07-30 ValidFAA registration status code V: Valid registration. All codes
N44VT Vans Acft/Day Tw/Day Mm
RV-6A
Fixed-wing, single engine Individual owner
Idaho
Experimental 2024-07-30 ValidFAA registration status code V: Valid registration. All codes
N7281D Piper
PA-18A 150
Fixed-wing, single engine Individual owner
Alaska
Standard 2024-07-30 ValidFAA registration status code V: Valid registration. All codes
N75909 Cessna
172N
Fixed-wing, single engine Individual owner
Alaska
Standard 2024-07-30 ValidFAA registration status code V: Valid registration. All codes
N80533 Cessna
172M
Fixed-wing, single engine Euroaviation INC Trustee
Kematen,
Standard 2024-07-30 ValidFAA registration status code V: Valid registration. All codes
N904RA Cessna
172M
Fixed-wing, single engine Jw Aero Holdings INC
Canandaigua, New York
Standard 2024-07-30 ValidFAA registration status code V: Valid registration. All codes
N97749 Cessna
172P
Fixed-wing, single engine Individual owner
Utah
Standard 2024-07-30 ValidFAA registration status code V: Valid registration. All codes
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Source: FAA Civil Aviation Registry, Releasable Aircraft Database (the engine reference table and each aircraft's engine code), October 8, 2026. Horsepower and thrust are the FAA's figures for the series, not for a particular aircraft.