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
N7093G Cessna
172K
Fixed-wing, single engine Aero Performance LLC
Scooba, Mississippi
Standard 2024-03-04 ValidFAA registration status code V: Valid registration. All codes
N739MM Cessna
172N
Fixed-wing, single engine Wet Sky LLC
Fort Myers, Florida
Standard 2024-03-04 ValidFAA registration status code V: Valid registration. All codes
N13KK Cessna
172N
Fixed-wing, single engine Sanders Flight Training Center INC
Jasper, Alabama
Standard 2024-03-03 ValidFAA registration status code V: Valid registration. All codes
N5582W Piper
PA-28-150
Fixed-wing, single engine Individual owner
Indiana
Standard 2024-03-03 ValidFAA registration status code V: Valid registration. All codes
N172GB Cessna
172L
Fixed-wing, single engine Aig Aeronautics LLC
Guaynabo, Puerto Rico
Standard 2024-03-02 ValidFAA registration status code V: Valid registration. All codes
N17BE Ellison Benjamin L
LONG-EZ
Fixed-wing, single engine Deltafox Aviation LLC
Port Orange, Florida
Experimental 2024-03-02 ValidFAA registration status code V: Valid registration. All codes
N30128 Cessna
177
Fixed-wing, single engine Mizani Air LLC
San Antonio, Texas
Standard 2024-03-02 ValidFAA registration status code V: Valid registration. All codes
N3107P Cessna
172N
Fixed-wing, single engine Individual owner
Ohio
Standard 2024-03-02 ValidFAA registration status code V: Valid registration. All codes
N3333W Piper
PA-28-140
Fixed-wing, single engine Withheld at owner's request
Standard 2024-03-02 ValidFAA registration status code V: Valid registration. All codes
N3757K Piper
PA-28-140
Fixed-wing, single engine Skylux Aviation LLC
Coppell, Texas
Standard 2024-03-02 ValidFAA registration status code V: Valid registration. All codes
N107ND Piper
PA-28-161
Fixed-wing, single engine N107Nd LLC
Wilmington, Delaware
Standard 2024-03-01 ValidFAA registration status code V: Valid registration. All codes
N314SH Herrick Steve
NORTH STAR
Fixed-wing, single engine Individual owner
Colorado
Experimental 2024-03-01 ValidFAA registration status code V: Valid registration. All codes
N4954G Cessna
172N
Fixed-wing, single engine Kris Noone Air LLC
Wilmington, Delaware
Standard 2024-03-01 ValidFAA registration status code V: Valid registration. All codes
N738ZF Cessna
172N
Fixed-wing, single engine Individual owner
Ohio
Standard 2024-03-01 ValidFAA registration status code V: Valid registration. All codes
N7614D Piper
PA-22-150
Fixed-wing, single engine Big Bend Community College Foundation
Moses Lake, Washington
Standard 2024-03-01 ValidFAA registration status code V: Valid registration. All codes
N78299 Cessna
172K
Fixed-wing, single engine Jb Aircraft LLC
Anchorage, Alaska
Standard 2024-03-01 ValidFAA registration status code V: Valid registration. All codes
N79489 Cessna
172K
Fixed-wing, single engine Individual owner
Florida
Standard 2024-03-01 ValidFAA registration status code V: Valid registration. All codes
N844RV Conner Michael A
VANS ACFT INC RV-4
Fixed-wing, single engine Individual owner
Texas
Experimental 2024-03-01 ValidFAA registration status code V: Valid registration. All codes
N8739 Bellanca
7GCAA
Fixed-wing, single engine Individual owner
Louisiana
Standard 2024-03-01 ValidFAA registration status code V: Valid registration. All codes
N9036K Piper
PA-28-161
Fixed-wing, single engine Individual owner
New York
Standard 2024-03-01 ValidFAA registration status code V: Valid registration. All codes
N9536S Champion
7GCAA
Fixed-wing, single engine Express Aviation LLC
Philadelphia, Mississippi
Standard 2024-03-01 ValidFAA registration status code V: Valid registration. All codes
N9592U Grumman American Avn. Corp.
AA-5A
Fixed-wing, single engine Kilroy Aviation LLC
Versailles, Kentucky
Standard 2024-03-01 ValidFAA registration status code V: Valid registration. All codes
N177FG Cessna
177
Fixed-wing, single engine Co-owned owner
California
Standard 2024-02-29 ValidFAA registration status code V: Valid registration. All codes
N18LF Falconi Louis J
THORP T 18
Fixed-wing, single engine Individual owner
Texas
Experimental 2024-02-29 ValidFAA registration status code V: Valid registration. All codes
N78834 Cessna
172K
Fixed-wing, single engine Individual owner
Alabama
Standard 2024-02-29 ValidFAA registration status code V: Valid registration. All codes
N8837N Piper
PA-28-140
Fixed-wing, single engine Alpha Kilo Aviation LLC
Wasilla, Alaska
Standard 2024-02-29 ValidFAA registration status code V: Valid registration. All codes
N1161H Piper
PA-28-151
Fixed-wing, single engine Individual owner
Hawaii
Standard 2024-02-28 ValidFAA registration status code V: Valid registration. All codes
N19972 Cessna
172M
Fixed-wing, single engine Individual owner
Ohio
Standard 2024-02-28 ValidFAA registration status code V: Valid registration. All codes
N20009 Cessna
172M
Fixed-wing, single engine Individual owner
Georgia
Standard 2024-02-28 ValidFAA registration status code V: Valid registration. All codes
N210JA Grumman American Avn. Corp.
AA-5A
Fixed-wing, single engine Co-owned owner
Florida
Standard 2024-02-28 ValidFAA registration status code V: Valid registration. All codes
N2168P Piper
PA-23
Fixed-wing, multi-engine Individual owner
Georgia
Standard 2024-02-28 ValidFAA registration status code V: Valid registration. All codes
N333FK Gulfstream American Corp
AA-5A
Fixed-wing, single engine Individual owner
Georgia
Standard 2024-02-28 ValidFAA registration status code V: Valid registration. All codes
N5205W Piper
PA-28-160
Fixed-wing, single engine Aircraft 1821 LLC
North Charleston, South Carolina
Standard 2024-02-28 ValidFAA registration status code V: Valid registration. All codes
N5989W Piper
PA-28-140
Fixed-wing, single engine Individual owner
Georgia
Standard 2024-02-28 ValidFAA registration status code V: Valid registration. All codes
N6112W Piper
PA-28-140
Fixed-wing, single engine Individual owner
Texas
Standard 2024-02-28 ValidFAA registration status code V: Valid registration. All codes
N611BD Cessna
172M
Fixed-wing, single engine Clement Aviation INC
Tea, South Dakota
Standard 2024-02-28 ValidFAA registration status code V: Valid registration. All codes
N6394C Piper
PA-28-161
Fixed-wing, single engine Atd Pilot Training LLC
Kansas City, Missouri
Standard 2024-02-28 ValidFAA registration status code V: Valid registration. All codes
N64454 Cessna
172M
Fixed-wing, single engine True Blue Flying LLC
Wilmington, Delaware
Standard 2024-02-28 ValidFAA registration status code V: Valid registration. All codes
N7289L Grumman American Avn. Corp.
AA-5
Fixed-wing, single engine Individual owner
Missouri
Standard 2024-02-28 ValidFAA registration status code V: Valid registration. All codes
N78523 Cessna
172K
Fixed-wing, single engine Individual owner
Nebraska
Standard 2024-02-28 ValidFAA registration status code V: Valid registration. All codes
N816GM Piper
PA-28-151
Fixed-wing, single engine Atd Pilot Training LLC
Kansas City, Missouri
Standard 2024-02-28 ValidFAA registration status code V: Valid registration. All codes
N82149 Cessna
172N
Fixed-wing, single engine Sanders Flight Training Center INC
Jasper, Alabama
Standard 2024-02-28 ValidFAA registration status code V: Valid registration. All codes
N9513H Cessna
172M
Fixed-wing, single engine High Flight Academy LLC
Allison Park, Pennsylvania
Standard 2024-02-28 ValidFAA registration status code V: Valid registration. All codes
N9676V Cessna
172M
Fixed-wing, single engine Individual owner
Wisconsin
Standard 2024-02-28 ValidFAA registration status code V: Valid registration. All codes
N9737W Piper
PA-28-140
Fixed-wing, single engine Azzurra City Tours LLC
Staten Island, New York
Standard 2024-02-28 ValidFAA registration status code V: Valid registration. All codes
N9961W Piper
PA-28-140
Fixed-wing, single engine Viper Enterprises LLC
Rolla, Missouri
Standard 2024-02-28 ValidFAA registration status code V: Valid registration. All codes
N10989 Bellanca
7GCBC
Fixed-wing, single engine Co-owned owner
Pennsylvania
Standard 2024-02-27 ValidFAA registration status code V: Valid registration. All codes
N123CL Cessna
172M
Fixed-wing, single engine Pcs Air LLC
Middletown, Pennsylvania
Standard 2024-02-27 ValidFAA registration status code V: Valid registration. All codes
N27MH Aero Commander
100
Fixed-wing, single engine Individual owner
Tennessee
Standard 2024-02-27 ValidFAA registration status code V: Valid registration. All codes
N4754J Beech
A23-19
Fixed-wing, single engine Individual owner
Arizona
Standard 2024-02-27 ValidFAA registration status code V: Valid registration. All codes
N490R Blue Diamond Aviation Inc
MURPHY REBEL
Fixed-wing, single engine
Experimental 2024-02-27 ValidFAA registration status code V: Valid registration. All codes
N733JF Cessna
172N
Fixed-wing, single engine Individual owner
Utah
Standard 2024-02-27 ValidFAA registration status code V: Valid registration. All codes
N734SB Cessna
172N
Fixed-wing, single engine Co-owned owner
West Virginia
Standard 2024-02-27 ValidFAA registration status code V: Valid registration. All codes
N737QX Cessna
172N
Fixed-wing, single engine First Eclipse LTD
Richmond, Virginia
Standard 2024-02-27 ValidFAA registration status code V: Valid registration. All codes
N7729G Cessna
172L
Fixed-wing, single engine Valiair Lc Trustee
Casper, Wyoming
Standard 2024-02-27 ValidFAA registration status code V: Valid registration. All codes
N8524D Piper
PA-22-150
Fixed-wing, single engine Big Bend Community College Foundation
Moses Lake, Washington
Standard 2024-02-27 ValidFAA registration status code V: Valid registration. All codes
N138TP Piper
PA-28-140
Fixed-wing, single engine Two Pauls LLC
Forked River, New Jersey
Standard 2024-02-26 ValidFAA registration status code V: Valid registration. All codes
N61991 Cessna
172M
Fixed-wing, single engine Individual owner
Arizona
Standard 2024-02-26 ValidFAA registration status code V: Valid registration. All codes
N738TP Cessna
172N
Fixed-wing, single engine Co-owned owner
Florida
Standard 2024-02-26 ValidFAA registration status code V: Valid registration. All codes
N8423L Cessna
172I
Fixed-wing, single engine Individual owner
Washington
Standard 2024-02-26 ValidFAA registration status code V: Valid registration. All codes
N180KS Cessna
172P
Fixed-wing, single engine Sky West Aviation INC Trustee
Albuquerque, New Mexico
Standard 2024-02-25 ValidFAA registration status code V: Valid registration. All codes
N311EH Cessna
172N
Fixed-wing, single engine Five Six Zero One LLC
Orange, California
Standard 2024-02-25 ValidFAA registration status code V: Valid registration. All codes
N4258J Piper
PA-28-140
Fixed-wing, single engine Alpha Kilo Aviation LLC
Wasilla, Alaska
Standard 2024-02-25 ValidFAA registration status code V: Valid registration. All codes
N55010 Piper
PA-28-140
Fixed-wing, single engine Royal Aviation Academy LLC
Sarasota, Florida
Standard 2024-02-25 ValidFAA registration status code V: Valid registration. All codes
N5871L American
AA-5
Fixed-wing, single engine Individual owner
Florida
Standard 2024-02-25 ValidFAA registration status code V: Valid registration. All codes
N61873 Cessna
172M
Fixed-wing, single engine Umo Seneca LLC
Raleigh, North Carolina
Standard 2024-02-25 ValidFAA registration status code V: Valid registration. All codes
N78375 Cessna
172K
Fixed-wing, single engine Bozeman Leasing INC
Bozeman, Montana
Standard 2024-02-25 ValidFAA registration status code V: Valid registration. All codes
N91151 Piper
PA-18-150
Fixed-wing, single engine Individual owner
Montana
Standard 2024-02-25 ValidFAA registration status code V: Valid registration. All codes
N5194F Cessna
172N
Fixed-wing, single engine Sanders Flight Training Center INC
Jasper, Alabama
Standard 2024-02-24 ValidFAA registration status code V: Valid registration. All codes
N5457D Cessna
172N
Fixed-wing, single engine Sanders Flight Training Center INC
Jasper, Alabama
Standard 2024-02-24 ValidFAA registration status code V: Valid registration. All codes
N56EP Cessna
172N
Fixed-wing, single engine Sanders Flight Training Center INC
Jasper, Alabama
Standard 2024-02-24 ValidFAA registration status code V: Valid registration. All codes
N172ES Cessna
172K
Fixed-wing, single engine Aero Quest LLC
Olive Branch, Mississippi
Standard 2024-02-23 ValidFAA registration status code V: Valid registration. All codes
N225FR Cessna
172N
Fixed-wing, single engine Co-owned owner
Texas
Standard 2024-02-23 ValidFAA registration status code V: Valid registration. All codes
N295GS Scott Stine
THORP T-18
Fixed-wing, single engine Individual owner
Indiana
Experimental 2024-02-23 ValidFAA registration status code V: Valid registration. All codes
N3256T Cessna
177
Fixed-wing, single engine Individual owner
Texas
Standard 2024-02-23 ValidFAA registration status code V: Valid registration. All codes
N415MS Piper
PA-28-161
Fixed-wing, single engine Co-owned owner
California
Standard 2024-02-23 ValidFAA registration status code V: Valid registration. All codes
N4845G Cessna
172N
Fixed-wing, single engine Individual owner
Florida
Standard 2024-02-23 ValidFAA registration status code V: Valid registration. All codes
N623WJ Piper
PA-28R-200
Fixed-wing, single engine Air Mods and Repair
Robbinsville, New Jersey
Standard 2024-02-23 ValidFAA registration status code V: Valid registration. All codes
N6824J Piper
PA-28-140
Fixed-wing, single engine Individual owner
Texas
Standard 2024-02-23 ValidFAA registration status code V: Valid registration. All codes
N79126 Cessna
172K
Fixed-wing, single engine Grounded Hangar INC
Turlock, California
Standard 2024-02-23 ValidFAA registration status code V: Valid registration. All codes
N7945G Cessna
172L
Fixed-wing, single engine Individual owner
Arizona
Standard 2024-02-23 ValidFAA registration status code V: Valid registration. All codes
N98265 Piper
PA-28-140
Fixed-wing, single engine Co-owned owner
South Carolina
Standard 2024-02-23 ValidFAA registration status code V: Valid registration. All codes
N9938W Piper
PA-28-140
Fixed-wing, single engine Individual owner
Virginia
Standard 2024-02-23 ValidFAA registration status code V: Valid registration. All codes
N1526J Piper
PA-28-140
Fixed-wing, single engine Rosedale Time LLC
Tulsa, Oklahoma
Standard 2024-02-22 ValidFAA registration status code V: Valid registration. All codes
N17SM Cessna
172N
Fixed-wing, single engine N17Sm LLC
Coral Springs, Florida
Standard 2024-02-22 ValidFAA registration status code V: Valid registration. All codes
N2FL Londo
STARDUSTER II
Fixed-wing, single engine Individual owner
Florida
Experimental 2024-02-22 ValidFAA registration status code V: Valid registration. All codes
N4415R Cessna
172M
Fixed-wing, single engine Co-owned owner
California
Standard 2024-02-22 ValidFAA registration status code V: Valid registration. All codes
N5788W Piper
PA-28-160
Fixed-wing, single engine Tech Flight CORP
South Hamilton, Massachusetts
Standard 2024-02-22 ValidFAA registration status code V: Valid registration. All codes
N7214E Shroyer Lonnie W
VANS RV6A
Fixed-wing, single engine Individual owner
Florida
Experimental 2024-02-22 ValidFAA registration status code V: Valid registration. All codes
N7561G Cessna
172L
Fixed-wing, single engine Co-owned owner
California
Standard 2024-02-22 ValidFAA registration status code V: Valid registration. All codes
N101RM Piper
PA-28-140
Fixed-wing, single engine Individual owner
Arizona
Standard 2024-02-21 ValidFAA registration status code V: Valid registration. All codes
N310EF Piper
PA-28-151
Fixed-wing, single engine Matherne Aviation LLC
Houma, Louisiana
Standard 2024-02-21 ValidFAA registration status code V: Valid registration. All codes
N36RB Piper
PA-28-140
Fixed-wing, single engine Individual owner
Florida
Standard 2024-02-21 ValidFAA registration status code V: Valid registration. All codes
N5138E Cessna
172N
Fixed-wing, single engine Sanders Flight Training Center INC
Jasper, Alabama
Standard 2024-02-21 ValidFAA registration status code V: Valid registration. All codes
N52473 Cessna
172P
Fixed-wing, single engine American Patrols INC
Midland, Texas
Standard 2024-02-21 ValidFAA registration status code V: Valid registration. All codes
N6678W Piper
PA-28-140
Fixed-wing, single engine Individual owner
Minnesota
Standard 2024-02-21 ValidFAA registration status code V: Valid registration. All codes
N7009Q Cessna
172L
Fixed-wing, single engine Joiner Legacy Enterprises LLC
Joliet, Montana
Standard 2024-02-21 ValidFAA registration status code V: Valid registration. All codes
N76990 Cessna
140
Fixed-wing, single engine Individual owner
Colorado
Standard 2024-02-21 ValidFAA registration status code V: Valid registration. All codes
N7748D Piper
PA-22-150
Fixed-wing, single engine Individual owner
Missouri
Standard 2024-02-21 ValidFAA registration status code V: Valid registration. All codes
N79410 Cessna
172K
Fixed-wing, single engine N79410 LLC
Tupelo, Mississippi
Standard 2024-02-21 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.