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
N12732 Cessna
172M
Fixed-wing, single engine Fly By Knight INC
Wilmington, Delaware
Standard 2024-03-15 ValidFAA registration status code V: Valid registration. All codes
N2567L Piper
PA-18-150
Fixed-wing, single engine Golden Valley LLC
Missoula, Montana
Standard 2024-03-15 ValidFAA registration status code V: Valid registration. All codes
N25WB Blackburn William A
PITTS S-1D
Fixed-wing, single engine Individual owner
Washington
Experimental 2024-03-15 ValidFAA registration status code V: Valid registration. All codes
N3266T Otto Tony F
TAILWIND W10
Fixed-wing, single engine Individual owner
AE
Experimental 2024-03-15 ValidFAA registration status code V: Valid registration. All codes
N4345B Piper
PA-28-161
Fixed-wing, single engine Co-owned owner
California
Standard 2024-03-15 ValidFAA registration status code V: Valid registration. All codes
N4590R Piper
PA-28-140
Fixed-wing, single engine Individual owner
Virginia
Standard 2024-03-15 ValidFAA registration status code V: Valid registration. All codes
N56898 Piper
PA-28-140
Fixed-wing, single engine Individual owner
Georgia
Standard 2024-03-15 ValidFAA registration status code V: Valid registration. All codes
N5900J Cessna
A150K
Fixed-wing, single engine Air America LLC
Sioux Falls, South Dakota
Standard 2024-03-15 ValidFAA registration status code V: Valid registration. All codes
N61539 Cessna
172M
Fixed-wing, single engine N61539 LLC
Arvada, Colorado
Standard 2024-03-15 ValidFAA registration status code V: Valid registration. All codes
N6357R Piper
PA-28-140
Fixed-wing, single engine Individual owner
Montana
Standard 2024-03-15 ValidFAA registration status code V: Valid registration. All codes
N65776 Cessna
172P
Fixed-wing, single engine Meridian Aviation Holding Company
Teterboro, New Jersey
Standard 2024-03-15 ValidFAA registration status code V: Valid registration. All codes
N7329J Piper
PA-28-140
Fixed-wing, single engine Walser Air LLC
Warwick, Rhode Island
Standard 2024-03-15 ValidFAA registration status code V: Valid registration. All codes
N76SS Cessna
172M
Fixed-wing, single engine North Texas Aeronautics LLC
Burleson, Texas
Standard 2024-03-15 ValidFAA registration status code V: Valid registration. All codes
N9170D Piper
PA-22-160
Fixed-wing, single engine Co-owned owner
Minnesota
Standard 2024-03-15 ValidFAA registration status code V: Valid registration. All codes
N9933U Grumman American Avn. Corp.
AA-5A
Fixed-wing, single engine Individual owner
Georgia
Standard 2024-03-15 ValidFAA registration status code V: Valid registration. All codes
N1815J Piper
PA-28-140
Fixed-wing, single engine Dodson International Parts INC
Rantoul, Kansas
Standard 2024-03-14 ValidFAA registration status code V: Valid registration. All codes
N2842P Piper
PA-22-150
Fixed-wing, single engine Individual owner
Washington
Standard 2024-03-14 ValidFAA registration status code V: Valid registration. All codes
N37674 Whitesell Michael Lee
RV-3
Fixed-wing, single engine Individual owner
Colorado
Experimental 2024-03-14 ValidFAA registration status code V: Valid registration. All codes
N808GJ Johnson Gary
PA-18 SUPER CUB KIT
Fixed-wing, single engine Individual owner
Alaska
Experimental 2024-03-14 ValidFAA registration status code V: Valid registration. All codes
N83076 Piper
PA-28-161
Fixed-wing, single engine N83076 LLC
Wayne, Pennsylvania
Standard 2024-03-14 ValidFAA registration status code V: Valid registration. All codes
N8902V Cessna
172M
Fixed-wing, single engine Flycarolina LLC
Concord, North Carolina
Standard 2024-03-14 ValidFAA registration status code V: Valid registration. All codes
N9349D Piper
PA-22-160
Fixed-wing, single engine Individual owner
Minnesota
Standard 2024-03-14 ValidFAA registration status code V: Valid registration. All codes
N95402 Piper
PA-28-140
Fixed-wing, single engine
Standard 2024-03-14 ValidFAA registration status code V: Valid registration. All codes
N20070 Cessna
172M
Fixed-wing, single engine Skywarrior Flight Training LLC
Pensacola, Florida
Standard 2024-03-13 ValidFAA registration status code V: Valid registration. All codes
N3333R Piper
PA-18-150
Fixed-wing, single engine Co-owned owner
Alaska
Standard 2024-03-13 ValidFAA registration status code V: Valid registration. All codes
N5376J Cessna
172N
Fixed-wing, single engine Tss Aviation LLC
Conyers, Georgia
Standard 2024-03-13 ValidFAA registration status code V: Valid registration. All codes
N5553U Piper
PA-28-140
Fixed-wing, single engine Individual owner
Pennsylvania
Standard 2024-03-13 ValidFAA registration status code V: Valid registration. All codes
N6062L American
AA-5
Fixed-wing, single engine Foo Flyers LLC
Charlotte, North Carolina
Standard 2024-03-13 ValidFAA registration status code V: Valid registration. All codes
N6461W Piper
PA-28-140
Fixed-wing, single engine Overstreet Aviation LLC
Sunray, Texas
Standard 2024-03-13 ValidFAA registration status code V: Valid registration. All codes
N7845D Piper
PA-22-150
Fixed-wing, single engine Individual owner
North Carolina
Standard 2024-03-13 ValidFAA registration status code V: Valid registration. All codes
N79263 Cessna
172K
Fixed-wing, single engine Individual owner
Ohio
Standard 2024-03-13 ValidFAA registration status code V: Valid registration. All codes
N7928C Piper
PA-28-140
Fixed-wing, single engine Cash Management Consulting LLC
Granite Springs, New York
Standard 2024-03-13 ValidFAA registration status code V: Valid registration. All codes
N90LS Piper
PA-18-150
Fixed-wing, single engine Individual owner
Arizona
Standard 2024-03-13 ValidFAA registration status code V: Valid registration. All codes
N9120H Cessna
172M
Fixed-wing, single engine Individual owner
Washington
Standard 2024-03-13 ValidFAA registration status code V: Valid registration. All codes
N14316 Piper
PA-18-150
Fixed-wing, single engine Pa-18 LLC
Hood River, Oregon
Standard 2024-03-12 ValidFAA registration status code V: Valid registration. All codes
N1431B Piper
PA-18-150
Fixed-wing, single engine Pa-18 LLC
Hood River, Oregon
Standard 2024-03-12 ValidFAA registration status code V: Valid registration. All codes
N52720 Cessna
172P
Fixed-wing, single engine Rick Aviation INC
Newport News, Virginia
Standard 2024-03-12 ValidFAA registration status code V: Valid registration. All codes
N7257F Piper
PA-28-140
Fixed-wing, single engine Individual owner
Minnesota
Standard 2024-03-12 ValidFAA registration status code V: Valid registration. All codes
N733LE Cessna
172N
Fixed-wing, single engine Chagres Flight Training LLC
Albuquerque, New Mexico
Standard 2024-03-12 ValidFAA registration status code V: Valid registration. All codes
N75807 Cessna
172N
Fixed-wing, single engine Pearl River Community College
Poplarville, Mississippi
Standard 2024-03-12 ValidFAA registration status code V: Valid registration. All codes
N7687S Bellanca
7GCBC
Fixed-wing, single engine Individual owner
West Virginia
Standard 2024-03-12 ValidFAA registration status code V: Valid registration. All codes
N1117R Globe
GC-1B
Fixed-wing, single engine Individual owner
Colorado
Standard 2024-03-11 ValidFAA registration status code V: Valid registration. All codes
N1167X Piper
PA-28-140
Fixed-wing, single engine Co-owned owner
Pennsylvania
Standard 2024-03-11 ValidFAA registration status code V: Valid registration. All codes
N22JB Bailey Starduster Too
SA-300
Fixed-wing, single engine Individual owner
Texas
Experimental 2024-03-11 ValidFAA registration status code V: Valid registration. All codes
N3282Q Piper
PA-28-140
Fixed-wing, single engine Individual owner
Tennessee
Standard 2024-03-11 ValidFAA registration status code V: Valid registration. All codes
N3407Z Piper
PA-22-150
Fixed-wing, single engine Bug Smashers LLC
Winfield, Kansas
Standard 2024-03-11 ValidFAA registration status code V: Valid registration. All codes
N345DE Cessna
172M
Fixed-wing, single engine Blue Sky Aviation Cayman INC
Wilmington, Delaware
Standard 2024-03-11 ValidFAA registration status code V: Valid registration. All codes
N3548P Piper
PA-22-150
Fixed-wing, single engine Individual owner
Texas
Standard 2024-03-11 ValidFAA registration status code V: Valid registration. All codes
N411DK Cessna
172L
Fixed-wing, single engine Swaz Aviation LLC
Mesa, Arizona
Standard 2024-03-11 ValidFAA registration status code V: Valid registration. All codes
N42361 Cessna
172M
Fixed-wing, single engine Lima 001 LLC
Muscatine, Iowa
Standard 2024-03-11 ValidFAA registration status code V: Valid registration. All codes
N4281T Piper
PA-28-140
Fixed-wing, single engine Individual owner
Florida
Standard 2024-03-11 ValidFAA registration status code V: Valid registration. All codes
N5065Z Bellanca
7GCBC
Fixed-wing, single engine Four Guys Flying LLC
Tunica, Mississippi
Standard 2024-03-11 ValidFAA registration status code V: Valid registration. All codes
N5165R Cessna
172M
Fixed-wing, single engine Avocado Air LLC
Perkasie, Pennsylvania
Standard 2024-03-11 ValidFAA registration status code V: Valid registration. All codes
N7833G Cessna
172L
Fixed-wing, single engine Orlandi Properties LLC
Blairstown, New Jersey
Standard 2024-03-11 ValidFAA registration status code V: Valid registration. All codes
N80322 Cessna
172M
Fixed-wing, single engine Mt Aviation LLC
Fairbanks, Alaska
Standard 2024-03-11 ValidFAA registration status code V: Valid registration. All codes
N9323E Cessna
172N
Fixed-wing, single engine Individual owner
Illinois
Standard 2024-03-11 ValidFAA registration status code V: Valid registration. All codes
N9684S Champion
7GCAA
Fixed-wing, single engine Gt Aviation LLC
Kalispell, Montana
Standard 2024-03-11 ValidFAA registration status code V: Valid registration. All codes
N97AD Piper
PA-28-140
Fixed-wing, single engine Individual owner
North Carolina
Standard 2024-03-11 ValidFAA registration status code V: Valid registration. All codes
N4286Z Piper
PA-18-150
Fixed-wing, single engine Individual owner
Mississippi
Standard 2024-03-10 ValidFAA registration status code V: Valid registration. All codes
N8067N Piper
PA-28-140
Fixed-wing, single engine Csp Avionics LLC
Knoxville, Tennessee
Standard 2024-03-09 ValidFAA registration status code V: Valid registration. All codes
N1919S Cessna
172M
Fixed-wing, single engine Individual owner
Maine
Standard 2024-03-08 ValidFAA registration status code V: Valid registration. All codes
N20JE Evens Joe
RV4
Fixed-wing, single engine Co-owned owner
Alabama
Experimental 2024-03-08 ValidFAA registration status code V: Valid registration. All codes
N2462E Cessna
172N
Fixed-wing, single engine Five Six Zero One LLC
Orange, California
Standard 2024-03-08 ValidFAA registration status code V: Valid registration. All codes
N3271Z Piper
PA-22-150
Fixed-wing, single engine Individual owner
Wisconsin
Standard 2024-03-08 ValidFAA registration status code V: Valid registration. All codes
N4309X Piper
PA-28-161
Fixed-wing, single engine Individual owner
Florida
Standard 2024-03-08 ValidFAA registration status code V: Valid registration. All codes
N441BM Piper
PA-28-140
Fixed-wing, single engine Individual owner
California
Standard 2024-03-08 ValidFAA registration status code V: Valid registration. All codes
N503WA Cessna
172M
Fixed-wing, single engine Three Rivers Aero INC
Three Rivers, Michigan
Standard 2024-03-08 ValidFAA registration status code V: Valid registration. All codes
N5591W Piper
PA-28-150
Fixed-wing, single engine Individual owner
Wisconsin
Standard 2024-03-08 ValidFAA registration status code V: Valid registration. All codes
N8445G Piper
PA-28-161
Fixed-wing, single engine Co-owned owner
Idaho
Standard 2024-03-08 ValidFAA registration status code V: Valid registration. All codes
N29329 Cessna
177
Fixed-wing, single engine Co-owned owner
Delaware
Standard 2024-03-07 ValidFAA registration status code V: Valid registration. All codes
N344AT Socata
TB 9 TAMPICO
Fixed-wing, single engine Individual owner
Florida
Standard 2024-03-07 ValidFAA registration status code V: Valid registration. All codes
N5589U Piper
PA-28-140
Fixed-wing, single engine Gq Aviation LLC
Cherry Hill, New Jersey
Standard 2024-03-07 ValidFAA registration status code V: Valid registration. All codes
N6391R Piper
PA-28-140
Fixed-wing, single engine Individual owner
Texas
Standard 2024-03-07 ValidFAA registration status code V: Valid registration. All codes
N7007T Piper
PA-18-150
Fixed-wing, single engine Co-owned owner
Alaska
Restricted 2024-03-07 ValidFAA registration status code V: Valid registration. All codes
N91203 Piper
PA-18-150
Fixed-wing, single engine Helicopter Roundup Service LLC
Nephi, Utah
Standard 2024-03-07 ValidFAA registration status code V: Valid registration. All codes
N103DB Alon
A2
Fixed-wing, single engine Individual owner
Wisconsin
Experimental 2024-03-06 ValidFAA registration status code V: Valid registration. All codes
N1897V Cessna
172M
Fixed-wing, single engine Barxbar Aviation LLC
Mesa, Arizona
Standard 2024-03-06 ValidFAA registration status code V: Valid registration. All codes
N5994S Beech
A23-19
Fixed-wing, single engine Three Musketeers LLC
Gorham, Kansas
Standard 2024-03-06 ValidFAA registration status code V: Valid registration. All codes
N7124L Grumman American Avn. Corp.
AA-5
Fixed-wing, single engine Triad Management Group LLC
Papillion, Nebraska
Standard 2024-03-06 ValidFAA registration status code V: Valid registration. All codes
N7631G Cessna
172L
Fixed-wing, single engine Chickadee Aviation LLC
Rangeley, Maine
Standard 2024-03-06 ValidFAA registration status code V: Valid registration. All codes
N172KW Cessna
172N
Fixed-wing, single engine Tap Solutions INC
San Diego, California
Standard 2024-03-05 ValidFAA registration status code V: Valid registration. All codes
N20157 Cessna
172M
Fixed-wing, single engine Kelley Aircraft LLC
Weyers Cave, Virginia
Standard 2024-03-05 ValidFAA registration status code V: Valid registration. All codes
N2818Z Piper
PA-22-150
Fixed-wing, single engine Individual owner
New Jersey
Standard 2024-03-05 ValidFAA registration status code V: Valid registration. All codes
N32419 Piper
PA-28-140
Fixed-wing, single engine Withheld at owner's request
Standard 2024-03-05 ValidFAA registration status code V: Valid registration. All codes
N35469 Cessna
172I
Fixed-wing, single engine Individual owner
Washington
Standard 2024-03-05 ValidFAA registration status code V: Valid registration. All codes
N44407 Piper
PA-28-140
Fixed-wing, single engine Individual owner
Wisconsin
Standard 2024-03-05 ValidFAA registration status code V: Valid registration. All codes
N45WR Raksanyi William J
PAZMANY PL-1
Fixed-wing, single engine Uso Security INC
Chino, California
Experimental 2024-03-05 ValidFAA registration status code V: Valid registration. All codes
N4895G Cessna
172N
Fixed-wing, single engine Co-owned owner
California
Standard 2024-03-05 ValidFAA registration status code V: Valid registration. All codes
N76JE Love
STARDUSTER SA-100
Fixed-wing, single engine Individual owner
Indiana
Experimental 2024-03-05 ValidFAA registration status code V: Valid registration. All codes
N8347L Cessna
172I
Fixed-wing, single engine Individual owner
Montana
Standard 2024-03-05 ValidFAA registration status code V: Valid registration. All codes
N8557D Piper
PA-22-150
Fixed-wing, single engine Individual owner
Maine
Standard 2024-03-05 ValidFAA registration status code V: Valid registration. All codes
N19997 Cessna
172M
Fixed-wing, single engine Neel Aviation LLC
Lakeland, Florida
Standard 2024-03-04 ValidFAA registration status code V: Valid registration. All codes
N20211 Cessna
172M
Fixed-wing, single engine Lee Cas LLC
Macomb, Illinois
Standard 2024-03-04 ValidFAA registration status code V: Valid registration. All codes
N26TF Cessna
172M
Fixed-wing, single engine Top Flight Aviation INC
Corona, California
Standard 2024-03-04 ValidFAA registration status code V: Valid registration. All codes
N3403P Piper
PA-23-160
Fixed-wing, multi-engine Individual owner
Ohio
Standard 2024-03-04 ValidFAA registration status code V: Valid registration. All codes
N401R Eickstedt Raymond W
RV-4
Fixed-wing, single engine Individual owner
Idaho
Experimental 2024-03-04 ValidFAA registration status code V: Valid registration. All codes
N40951 Piper
PA-28-140
Fixed-wing, single engine Individual owner
Indiana
Standard 2024-03-04 ValidFAA registration status code V: Valid registration. All codes
N4353X Piper
PA-28-151
Fixed-wing, single engine Individual owner
New York
Standard 2024-03-04 ValidFAA registration status code V: Valid registration. All codes
N5649U Piper
PA-28-140
Fixed-wing, single engine Individual owner
New York
Standard 2024-03-04 ValidFAA registration status code V: Valid registration. All codes
N5922F Piper
PA-28-151
Fixed-wing, single engine Neel Aviation LLC
Lakeland, Florida
Standard 2024-03-04 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.