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
N64259 Cessna
172M
Fixed-wing, single engine Aerospatial LLC
Yakima, Washington
Standard 2022-11-28 ValidFAA registration status code V: Valid registration. All codes
N737PY Cessna
172N
Fixed-wing, single engine My Way Aviation LLC
Weston, Florida
Standard 2022-11-28 ValidFAA registration status code V: Valid registration. All codes
N738HP Cessna
172N
Fixed-wing, single engine Individual owner
Oregon
Standard 2022-11-28 ValidFAA registration status code V: Valid registration. All codes
N7671S Bellanca
8KCAB
Fixed-wing, single engine Klos Aero LLC
Plevna, Montana
Standard 2022-11-28 ValidFAA registration status code V: Valid registration. All codes
N8222D Piper
PA-28-161
Fixed-wing, single engine Paphos Airways LLC
Farmingdale, New York
Standard 2022-11-28 ValidFAA registration status code V: Valid registration. All codes
N9078Y Piper
PA-18-150
Fixed-wing, single engine Individual owner
Texas
Standard 2022-11-28 ValidFAA registration status code V: Valid registration. All codes
N9286D Piper
PA-18A 150
Fixed-wing, single engine Individual owner
Mississippi
Restricted 2022-11-28 ValidFAA registration status code V: Valid registration. All codes
N9610Q Cessna
172M
Fixed-wing, single engine US Aviation Group LLC
Denton, Texas
Restricted 2022-11-28 ValidFAA registration status code V: Valid registration. All codes
N158GC Grumman American Avn. Corp.
AA-5A
Fixed-wing, single engine Individual owner
Florida
Standard 2022-11-26 ValidFAA registration status code V: Valid registration. All codes
N450FL Piper
PA-28-140
Fixed-wing, single engine Morriss Aviation LLC
Allen, Texas
Standard 2022-11-26 ValidFAA registration status code V: Valid registration. All codes
N5914W Piper
PA-28-150
Fixed-wing, single engine Steadfast Avatiion LLC
Mesa, Arizona
Standard 2022-11-26 ValidFAA registration status code V: Valid registration. All codes
N6060D Piper
PA-22-150
Fixed-wing, single engine Individual owner
Alaska
Standard 2022-11-26 ValidFAA registration status code V: Valid registration. All codes
N9285Y Piper
PA-18-150
Fixed-wing, single engine Co-owned owner
Alaska
Standard 2022-11-26 ValidFAA registration status code V: Valid registration. All codes
N15LR Riggs Larry
RV-4
Fixed-wing, single engine Individual owner
Arizona
Experimental 2022-11-25 ValidFAA registration status code V: Valid registration. All codes
N2318T Piper
PA-28-140
Fixed-wing, single engine Individual owner
Georgia
Standard 2022-11-25 ValidFAA registration status code V: Valid registration. All codes
N31268 Bellanca
7GCBC
Fixed-wing, single engine Individual owner
Tennessee
Standard 2022-11-25 ValidFAA registration status code V: Valid registration. All codes
N3156T Cessna
177
Fixed-wing, single engine Individual owner
Florida
Standard 2022-11-25 ValidFAA registration status code V: Valid registration. All codes
N7818G Cessna
172L
Fixed-wing, single engine Individual owner
Massachusetts
Standard 2022-11-25 ValidFAA registration status code V: Valid registration. All codes
N512RS Rollison Michael William
RV-6
Fixed-wing, single engine Co-owned owner
Pennsylvania
Experimental 2022-11-24 ValidFAA registration status code V: Valid registration. All codes
N5356D Cessna
172N
Fixed-wing, single engine Co-owned owner
Oregon
Standard 2022-11-24 ValidFAA registration status code V: Valid registration. All codes
N5959U Piper
PA-28-140
Fixed-wing, single engine Individual owner
Minnesota
Standard 2022-11-24 ValidFAA registration status code V: Valid registration. All codes
N84071 Cessna
172K
Fixed-wing, single engine Roadrunner Flight School LLC
Farmington, New Mexico
Standard 2022-11-24 ValidFAA registration status code V: Valid registration. All codes
N9846W Piper
PA-28-140
Fixed-wing, single engine Individual owner
Arizona
Standard 2022-11-24 ValidFAA registration status code V: Valid registration. All codes
N10SQ Mckinne Philip A
RV-4
Fixed-wing, single engine Individual owner
Oklahoma
Experimental 2022-11-23 ValidFAA registration status code V: Valid registration. All codes
N53571 Cessna
172P
Fixed-wing, single engine Individual owner
Washington
Standard 2022-11-23 ValidFAA registration status code V: Valid registration. All codes
N5461L Grumman American Avn. Corp.
AA-5
Fixed-wing, single engine Individual owner
Texas
Standard 2022-11-23 ValidFAA registration status code V: Valid registration. All codes
N1313 Piper
PA-18-150
Fixed-wing, single engine Co-owned owner
Ohio
Standard 2022-11-22 ValidFAA registration status code V: Valid registration. All codes
N2512P Piper
PA-22-150
Fixed-wing, single engine Individual owner
Virginia
Standard 2022-11-22 ValidFAA registration status code V: Valid registration. All codes
N30658 Piper
J5A
Fixed-wing, single engine Individual owner
Arkansas
Experimental 2022-11-22 ValidFAA registration status code V: Valid registration. All codes
N3763K Piper
PA-28-140
Fixed-wing, single engine Individual owner
Florida
Standard 2022-11-22 ValidFAA registration status code V: Valid registration. All codes
N43652 Piper
PA-28-161
Fixed-wing, single engine Individual owner
California
Standard 2022-11-22 ValidFAA registration status code V: Valid registration. All codes
N56978 Piper
PA-28-140
Fixed-wing, single engine Individual owner
Alabama
Standard 2022-11-22 ValidFAA registration status code V: Valid registration. All codes
N600PF Piper
PA-28-161
Fixed-wing, single engine Eastern Aviation CORP
Whitestone, New York
Standard 2022-11-22 ValidFAA registration status code V: Valid registration. All codes
N727RC Cessna
172M
Fixed-wing, single engine Kelley Aircraft LLC
Weyers Cave, Virginia
Standard 2022-11-22 ValidFAA registration status code V: Valid registration. All codes
N865ES Piper
PA-18-150
Fixed-wing, single engine Hangar Ak LLC
Sterling, Alaska
Standard 2022-11-22 ValidFAA registration status code V: Valid registration. All codes
N1741J Piper
PA-28-140
Fixed-wing, single engine Individual owner
Alabama
Standard 2022-11-21 ValidFAA registration status code V: Valid registration. All codes
N440GC Norlander Robert M
RV 6
Fixed-wing, single engine Individual owner
Minnesota
Experimental 2022-11-21 ValidFAA registration status code V: Valid registration. All codes
N47835 Piper
PA-28-161
Fixed-wing, single engine Individual owner
Nebraska
Standard 2022-11-21 ValidFAA registration status code V: Valid registration. All codes
N7069B Piper
PA-18-150
Fixed-wing, single engine Co-owned owner
Oregon
Experimental 2022-11-21 ValidFAA registration status code V: Valid registration. All codes
N737SZ Cessna
172N
Fixed-wing, single engine Individual owner
Oregon
Standard 2022-11-21 ValidFAA registration status code V: Valid registration. All codes
N739XT Cessna
172N
Fixed-wing, single engine S O W Aviation LLC
Crystal River, Florida
Standard 2022-11-21 ValidFAA registration status code V: Valid registration. All codes
N26398 Grumman American Avn. Corp.
AA-5A
Fixed-wing, single engine Individual owner
Hawaii
Standard 2022-11-19 ValidFAA registration status code V: Valid registration. All codes
N54036 Cessna
172P
Fixed-wing, single engine Missions Unlimited of Oregon INC DBA
Harrah, Oklahoma
Standard 2022-11-19 ValidFAA registration status code V: Valid registration. All codes
N6835H Cessna
172M
Fixed-wing, single engine Iowa Lakes Community College
Estherville, Iowa
Standard 2022-11-19 ValidFAA registration status code V: Valid registration. All codes
N739PV Cessna
172N
Fixed-wing, single engine Individual owner
Alabama
Standard 2022-11-19 ValidFAA registration status code V: Valid registration. All codes
N8480F Piper
PA-28-151
Fixed-wing, single engine St Pete Aviation Services LLC
St Petersburg, Florida
Standard 2022-11-18 ValidFAA registration status code V: Valid registration. All codes
N12968 Cessna
172M
Fixed-wing, single engine Rtd Aviation LLC
Hillsborough, New Jersey
Standard 2022-11-17 ValidFAA registration status code V: Valid registration. All codes
N1660P Piper
PA-18-150
Fixed-wing, single engine Individual owner
South Dakota
Standard 2022-11-17 ValidFAA registration status code V: Valid registration. All codes
N2347Q Beech
23
Fixed-wing, single engine Individual owner
Connecticut
Standard 2022-11-17 ValidFAA registration status code V: Valid registration. All codes
N2815F Piper
PA-28-161
Fixed-wing, single engine Individual owner
California
Standard 2022-11-17 ValidFAA registration status code V: Valid registration. All codes
N29107 Cessna
172M
Fixed-wing, single engine Wrong Brothers Aviation LLC
Brighton, Michigan
Standard 2022-11-17 ValidFAA registration status code V: Valid registration. All codes
N44ST Cessna
172N
Fixed-wing, single engine Individual owner
New Jersey
Standard 2022-11-17 ValidFAA registration status code V: Valid registration. All codes
N5500U Piper
PA-28-140
Fixed-wing, single engine Individual owner
Guam
Standard 2022-11-17 ValidFAA registration status code V: Valid registration. All codes
N56860 Piper
PA-28-151
Fixed-wing, single engine Individual owner
Pennsylvania
Standard 2022-11-17 ValidFAA registration status code V: Valid registration. All codes
N6201W Piper
PA-28-140
Fixed-wing, single engine Individual owner
Nebraska
Standard 2022-11-17 ValidFAA registration status code V: Valid registration. All codes
N733WG Cessna
172N
Fixed-wing, single engine Individual owner
Texas
Standard 2022-11-17 ValidFAA registration status code V: Valid registration. All codes
N1659J Piper
PA-28-140
Fixed-wing, single engine Hanger C22 LLC
Hillsboro, Oregon
Standard 2022-11-16 ValidFAA registration status code V: Valid registration. All codes
N5430L Grumman American Avn. Corp.
AA-5
Fixed-wing, single engine Individual owner
Texas
Standard 2022-11-16 ValidFAA registration status code V: Valid registration. All codes
N64423 Cessna
172P
Fixed-wing, single engine Dsr-Cherokee 180 LLC
Dallas, Texas
Standard 2022-11-16 ValidFAA registration status code V: Valid registration. All codes
N696HD Downes Harold J
RV6A
Fixed-wing, single engine Individual owner
New York
Experimental 2022-11-16 ValidFAA registration status code V: Valid registration. All codes
N73923 Cessna
172N
Fixed-wing, single engine Professional Aviation Aircraft Services LTD
New Philadelphia, Ohio
Multiple 2022-11-16 ValidFAA registration status code V: Valid registration. All codes
N90GR Allisonglen R
RV-4
Fixed-wing, single engine Aerospace Trust Management LLC Trustee
Wilmington, Delaware
Experimental 2022-11-16 ValidFAA registration status code V: Valid registration. All codes
N98525 Cessna
172P
Fixed-wing, single engine Trns Solutions LLC
Lewes, Delaware
Standard 2022-11-16 ValidFAA registration status code V: Valid registration. All codes
N1826J Piper
PA-28-140
Fixed-wing, single engine Pope County Aviation LLC
Russellville, Arkansas
Standard 2022-11-15 ValidFAA registration status code V: Valid registration. All codes
N5434D Cessna
172N
Fixed-wing, single engine Sierra Lima Aviation LLC
Riverton, Utah
Standard 2022-11-15 ValidFAA registration status code V: Valid registration. All codes
N5505W Piper
PA-28-160
Fixed-wing, single engine Individual owner
Kansas
Standard 2022-11-15 ValidFAA registration status code V: Valid registration. All codes
N62529 Cessna
172P
Fixed-wing, single engine Individual owner
New York
Standard 2022-11-15 ValidFAA registration status code V: Valid registration. All codes
N62694 Cessna
172P
Fixed-wing, single engine American Patrols INC
Midland, Texas
Standard 2022-11-15 ValidFAA registration status code V: Valid registration. All codes
N62876 Cessna
172P
Fixed-wing, single engine American Patrols INC
Midland, Texas
Standard 2022-11-15 ValidFAA registration status code V: Valid registration. All codes
N3055E Socata
TAMPICO TB 9C
Fixed-wing, single engine Individual owner
Texas
Standard 2022-11-14 ValidFAA registration status code V: Valid registration. All codes
N41575 Piper
PA-28-151
Fixed-wing, single engine Individual owner
Tennessee
Standard 2022-11-14 ValidFAA registration status code V: Valid registration. All codes
N4338Z Piper
PA-18-150
Fixed-wing, single engine Jwg Aviation LLC
Livingston, Montana
Standard 2022-11-14 ValidFAA registration status code V: Valid registration. All codes
N7366F Cessna
172N
Fixed-wing, single engine Individual owner
New York
Standard 2022-11-14 ValidFAA registration status code V: Valid registration. All codes
N8796N Piper
PA-28-140
Fixed-wing, single engine Individual owner
Maine
Standard 2022-11-14 ValidFAA registration status code V: Valid registration. All codes
N35581 Cessna
172I
Fixed-wing, single engine N35581 LLC
Longview, Texas
Standard 2022-11-12 ValidFAA registration status code V: Valid registration. All codes
N4421T Piper
PA-28-140
Fixed-wing, single engine Individual owner
Florida
Standard 2022-11-12 ValidFAA registration status code V: Valid registration. All codes
N549AC American Champion Aircraft
7GCAA
Fixed-wing, single engine Individual owner
North Carolina
Standard 2022-11-12 ValidFAA registration status code V: Valid registration. All codes
N7132B Piper
PA-22-150
Fixed-wing, single engine Individual owner
Idaho
Standard 2022-11-12 ValidFAA registration status code V: Valid registration. All codes
N81465 Gonzales Ray
LONG EZE
Fixed-wing, single engine Individual owner
California
Experimental 2022-11-12 ValidFAA registration status code V: Valid registration. All codes
N127EP Cessna
172P
Fixed-wing, single engine Individual owner
New York
Standard 2022-11-11 ValidFAA registration status code V: Valid registration. All codes
N4040Z Piper
PA-18-150
Fixed-wing, single engine Acme Cub Training INC
Anchorage, Alaska
Standard 2022-11-11 ValidFAA registration status code V: Valid registration. All codes
N6352W Piper
PA-28-140
Fixed-wing, single engine Individual owner
Ohio
Standard 2022-11-11 ValidFAA registration status code V: Valid registration. All codes
N91005 Piper
PA-18-150
Fixed-wing, single engine Individual owner
California
Standard 2022-11-11 ValidFAA registration status code V: Valid registration. All codes
N96105 Cessna
172P
Fixed-wing, single engine Demon Air LLC
Palm City, Florida
Standard 2022-11-11 ValidFAA registration status code V: Valid registration. All codes
N1163X Piper
PA-28-151
Fixed-wing, single engine Co-owned owner
Oregon
Standard 2022-11-09 ValidFAA registration status code V: Valid registration. All codes
N1339R Grumman American Avn. Corp.
AA-5
Fixed-wing, single engine Individual owner
California
Standard 2022-11-09 ValidFAA registration status code V: Valid registration. All codes
N14EM Marshall Ernest H
LANCAIR 235
Fixed-wing, single engine Individual owner
Nevada
Experimental 2022-11-09 ValidFAA registration status code V: Valid registration. All codes
N1553J Piper
PA-28-140
Fixed-wing, single engine Individual owner
Texas
Standard 2022-11-09 ValidFAA registration status code V: Valid registration. All codes
N2334T Piper
PA-28-140
Fixed-wing, single engine Gogoplex LLC
Wilmington, Delaware
Standard 2022-11-09 ValidFAA registration status code V: Valid registration. All codes
N5711U Piper
PA-28-140
Fixed-wing, single engine Black Cat Aviation INC
Wilmington, Delaware
Standard 2022-11-09 ValidFAA registration status code V: Valid registration. All codes
N1562J Piper
PA-28-140
Fixed-wing, single engine Individual owner
Alabama
Standard 2022-11-08 ValidFAA registration status code V: Valid registration. All codes
N4765J Beech
A23-19
Fixed-wing, single engine Individual owner
Oklahoma
Standard 2022-11-08 ValidFAA registration status code V: Valid registration. All codes
N5603W Piper
PA-28-160
Fixed-wing, single engine Co-owned owner
Ohio
Restricted 2022-11-08 ValidFAA registration status code V: Valid registration. All codes
N8300R Piper
PA-28-140
Fixed-wing, single engine Individual owner
South Carolina
Standard 2022-11-08 ValidFAA registration status code V: Valid registration. All codes
N19948 Cessna
172M
Fixed-wing, single engine Murray Air LLC
Patoka, Illinois
Standard 2022-11-07 ValidFAA registration status code V: Valid registration. All codes
N73312 Cessna
172M
Fixed-wing, single engine Murray Air LLC
Patoka, Illinois
Standard 2022-11-07 ValidFAA registration status code V: Valid registration. All codes
N12883 Cessna
172M
Fixed-wing, single engine Rpm Aero LLC
Lincolnwood, Illinois
Standard 2022-11-05 ValidFAA registration status code V: Valid registration. All codes
N131SG American Champion Aircraft
7GCBC
Fixed-wing, single engine Individual owner
North Carolina
Standard 2022-11-05 ValidFAA registration status code V: Valid registration. All codes
N1701T Piper
PA-28-140
Fixed-wing, single engine Rd Aire LLC
Opelika, Alabama
Standard 2022-11-05 ValidFAA registration status code V: Valid registration. All codes
N238TW Cessna
172P
Fixed-wing, single engine Individual owner
Washington
Standard 2022-11-05 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.