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
N907UT Piper
PA-18A 150
Fixed-wing, single engine Individual owner
Alaska
Standard 2018-02-02 ValidFAA registration status code V: Valid registration. All codes
N1423T Piper
PA-28-140
Fixed-wing, single engine Co-owned owner
Iowa
Special flight permit 2018-02-01 ValidFAA registration status code V: Valid registration. All codes
N3891Q Cessna
172L
Fixed-wing, single engine Co-owned owner
Indiana
Standard 2018-02-01 ValidFAA registration status code V: Valid registration. All codes
N4507X Piper
PA-28-140
Fixed-wing, single engine Individual owner
California
Experimental 2018-02-01 ValidFAA registration status code V: Valid registration. All codes
N4562R Piper
PA-28-140
Fixed-wing, single engine Individual owner
Texas
Standard 2018-02-01 ValidFAA registration status code V: Valid registration. All codes
N6780H Cessna
172M
Fixed-wing, single engine Individual owner
Alabama
Standard 2018-02-01 ValidFAA registration status code V: Valid registration. All codes
N9449D Piper
PA-18-150
Fixed-wing, single engine Hall Aircraft LLC
Kenai, Alaska
Standard 2018-02-01 ValidFAA registration status code V: Valid registration. All codes
N9860W Piper
PA-28-140
Fixed-wing, single engine Individual owner
New Mexico
Standard 2018-02-01 ValidFAA registration status code V: Valid registration. All codes
N1930U Gazzano Leonard S
RV-4
Fixed-wing, single engine Individual owner
Nevada
Experimental 2018-01-31 ValidFAA registration status code V: Valid registration. All codes
N7158L Grumman American Avn. Corp.
AA-5
Fixed-wing, single engine Individual owner
Washington
Standard 2018-01-31 ValidFAA registration status code V: Valid registration. All codes
N9884V Cessna
172M
Fixed-wing, single engine Individual owner
Illinois
Standard 2018-01-31 ValidFAA registration status code V: Valid registration. All codes
N1736P Piper
PA-22-150
Fixed-wing, single engine Withheld at owner's request
Standard 2018-01-30 ValidFAA registration status code V: Valid registration. All codes
N30182 Cessna
177
Fixed-wing, single engine Individual owner
South Dakota
Standard 2018-01-30 ValidFAA registration status code V: Valid registration. All codes
N41551 Piper
PA-18-150
Fixed-wing, single engine Plane Services LLC
Twin Falls, Idaho
Standard 2018-01-30 ValidFAA registration status code V: Valid registration. All codes
N4451Z Piper
PA-18-150
Fixed-wing, single engine Individual owner
Washington
Standard 2018-01-30 ValidFAA registration status code V: Valid registration. All codes
N4774A Piper
PA-22-150
Fixed-wing, single engine Individual owner
Alaska
Standard 2018-01-30 ValidFAA registration status code V: Valid registration. All codes
N9351S Beech
B19
Fixed-wing, single engine Hauling AG INC
Middlebury, Indiana
Standard 2018-01-30 ValidFAA registration status code V: Valid registration. All codes
N9924Q Cessna
172M
Fixed-wing, single engine My Way Aviation LLC
Weston, Florida
Standard 2018-01-30 ValidFAA registration status code V: Valid registration. All codes
N1292P Piper
PA-23
Fixed-wing, multi-engine Em Turbines CORP
Fort Lauderdale, Florida
Standard 2018-01-29 ValidFAA registration status code V: Valid registration. All codes
N30112 Cessna
177
Fixed-wing, single engine Co-owned owner
South Dakota
Standard 2018-01-29 ValidFAA registration status code V: Valid registration. All codes
N3657Z Piper
PA-22-160
Fixed-wing, single engine Individual owner
Colorado
Standard 2018-01-29 ValidFAA registration status code V: Valid registration. All codes
N46390 Cessna
172K
Fixed-wing, single engine Gerber Aviation LLC
Winter Haven, Florida
Standard 2018-01-29 ValidFAA registration status code V: Valid registration. All codes
N5242D Cessna
172N
Fixed-wing, single engine R&R Aero Services LLC
Eden Prairie, Minnesota
Standard 2018-01-29 ValidFAA registration status code V: Valid registration. All codes
N553AP Cessna
172P
Fixed-wing, single engine Aviation Paradise LLC
Homestead, Florida
Standard 2018-01-29 ValidFAA registration status code V: Valid registration. All codes
N4158Z Piper
PA-18-150
Fixed-wing, single engine Individual owner
Idaho
Standard 2018-01-26 ValidFAA registration status code V: Valid registration. All codes
N7132R Piper
PA-28-140
Fixed-wing, single engine Individual owner
Michigan
Standard 2018-01-26 ValidFAA registration status code V: Valid registration. All codes
N739NR Cessna
172N
Fixed-wing, single engine Diaz Aviation LLC
South New Berlin, New York
Standard 2018-01-26 ValidFAA registration status code V: Valid registration. All codes
N75749 Cessna
172N
Fixed-wing, single engine Individual owner
Michigan
Standard 2018-01-26 ValidFAA registration status code V: Valid registration. All codes
N2285Y Cessna
177
Fixed-wing, single engine Krid Cardinal LLC
Centerville, Indiana
Standard 2018-01-25 ValidFAA registration status code V: Valid registration. All codes
N35801 Cessna
172I
Fixed-wing, single engine Individual owner
New York
Standard 2018-01-25 ValidFAA registration status code V: Valid registration. All codes
N4098F Piper
PA-28-151
Fixed-wing, single engine N4098F LLC
Ypsilanti, Michigan
Standard 2018-01-25 ValidFAA registration status code V: Valid registration. All codes
N46360 Cessna
172M
Fixed-wing, single engine Individual owner
Oregon
Standard 2018-01-25 ValidFAA registration status code V: Valid registration. All codes
N4950D Cessna
172N
Fixed-wing, single engine Individual owner
Alaska
Standard 2018-01-25 ValidFAA registration status code V: Valid registration. All codes
N6355Z Piper
PA-25
Fixed-wing, single engine Quality Aviation INC
Marana, Arizona
Restricted 2018-01-25 ValidFAA registration status code V: Valid registration. All codes
N7008B Piper
PA-22-150
Fixed-wing, single engine Mayes Russell F
Farmersville, Illinois
Standard 2018-01-25 ValidFAA registration status code V: Valid registration. All codes
N734SX Cessna
172N
Fixed-wing, single engine Mondo Beyondo Thrill Squadron
Pasadena, California
Standard 2018-01-25 ValidFAA registration status code V: Valid registration. All codes
N74954 Piper
PA-18-150
Fixed-wing, single engine Co-owned owner
Alaska
Standard 2018-01-25 ValidFAA registration status code V: Valid registration. All codes
N7780Y Piper
PA-18-150
Fixed-wing, single engine Individual owner
Alaska
Restricted 2018-01-25 ValidFAA registration status code V: Valid registration. All codes
N9653Q Cessna
172M
Fixed-wing, single engine Co-owned owner
Texas
Standard 2018-01-25 ValidFAA registration status code V: Valid registration. All codes
N9827D Piper
PA-22-160
Fixed-wing, single engine Quality Aviation INC
Marana, Arizona
Standard 2018-01-25 ValidFAA registration status code V: Valid registration. All codes
N3919K Piper
PA-28-140
Fixed-wing, single engine Individual owner
Illinois
Standard 2018-01-24 ValidFAA registration status code V: Valid registration. All codes
N61CA Piper
PA-28-151
Fixed-wing, single engine Individual owner
Indiana
Standard 2018-01-24 ValidFAA registration status code V: Valid registration. All codes
N888CK Duncan Charles K
RV 4
Fixed-wing, single engine Individual owner
Pennsylvania
Experimental 2018-01-24 ValidFAA registration status code V: Valid registration. All codes
N9205Y Piper
PA-18-150
Fixed-wing, single engine Individual owner
Alaska
Standard 2018-01-24 ValidFAA registration status code V: Valid registration. All codes
N18RV Lindsey Larry C
RV-4
Fixed-wing, single engine Co-owned owner
Indiana
Experimental 2018-01-23 ValidFAA registration status code V: Valid registration. All codes
N2301B Temco
GC-1B
Fixed-wing, single engine Individual owner
Texas
Standard 2018-01-23 ValidFAA registration status code V: Valid registration. All codes
N4770A Piper
PA-22-150
Fixed-wing, single engine Individual owner
California
Standard 2018-01-23 ValidFAA registration status code V: Valid registration. All codes
N4845A Piper
PA-22-150
Fixed-wing, single engine Individual owner
Minnesota
Standard 2018-01-23 ValidFAA registration status code V: Valid registration. All codes
N5396S Piper
PA-28-140
Fixed-wing, single engine Individual owner
Ohio
Standard 2018-01-23 ValidFAA registration status code V: Valid registration. All codes
N6058Z Piper
PA-25
Fixed-wing, single engine Blackstone Aircraft LLC
Hartselle, Alabama
Restricted 2018-01-23 ValidFAA registration status code V: Valid registration. All codes
N1371T Piper
PA-28-140
Fixed-wing, single engine Saviortree House Ministries
Coarsegold, California
Standard 2018-01-19 ValidFAA registration status code V: Valid registration. All codes
N40520 Piper
PA-18-150
Fixed-wing, single engine Individual owner
Oregon
Standard 2018-01-19 ValidFAA registration status code V: Valid registration. All codes
N9250C Piper
PA-28-161
Fixed-wing, single engine Region Flyers LLC
Valparaiso, Indiana
Standard 2018-01-19 ValidFAA registration status code V: Valid registration. All codes
N245FR Cessna
172N
Fixed-wing, single engine Chupito Sabrocito LLC
Paso Robles, California
Standard 2018-01-18 ValidFAA registration status code V: Valid registration. All codes
N44Q Phillips
BUSHBY MUSTANG II
Fixed-wing, single engine Individual owner
North Carolina
Experimental 2018-01-18 ValidFAA registration status code V: Valid registration. All codes
N46708 Cessna
172K
Fixed-wing, single engine Individual owner
South Carolina
Standard 2018-01-18 ValidFAA registration status code V: Valid registration. All codes
N54048 Cessna
172P
Fixed-wing, single engine Hodge Flight Services LLC
Pittsburgh, California
Standard 2018-01-18 ValidFAA registration status code V: Valid registration. All codes
N5409J Cessna
172N
Fixed-wing, single engine Kelley Aircraft LLC
Weyers Cave, Virginia
Standard 2018-01-18 ValidFAA registration status code V: Valid registration. All codes
N737ZP Cessna
172N
Fixed-wing, single engine Jahawk Leasing LLC
Sugar Grove, Illinois
Standard 2018-01-18 ValidFAA registration status code V: Valid registration. All codes
N9113L Champion
7GCBC
Fixed-wing, single engine Zimin Carl e
Naknek, Alaska
Standard 2018-01-18 ValidFAA registration status code V: Valid registration. All codes
N1010Q Champion
7GCBC
Fixed-wing, single engine Individual owner
Minnesota
Standard 2018-01-17 ValidFAA registration status code V: Valid registration. All codes
N291KF Cessna
172L
Fixed-wing, single engine Total Flight Aircraft Leasing LLC
Apex, North Carolina
Standard 2018-01-17 ValidFAA registration status code V: Valid registration. All codes
N35700 Cessna
172I
Fixed-wing, single engine Sutton Aircraft Salvage LLC
Palmer, Alaska
Standard 2018-01-17 ValidFAA registration status code V: Valid registration. All codes
N4557R Piper
PA-28-140
Fixed-wing, single engine Individual owner
California
Standard 2018-01-17 ValidFAA registration status code V: Valid registration. All codes
N5507P Bellanca
7GCBC
Fixed-wing, single engine Individual owner
Oregon
Standard 2018-01-17 ValidFAA registration status code V: Valid registration. All codes
N738NX Cessna
172N
Fixed-wing, single engine Above All Aviation INC
Goleta, California
Standard 2018-01-16 ValidFAA registration status code V: Valid registration. All codes
N1752P Piper
PA-18-150
Fixed-wing, single engine Purdy Ranch LLC
Buffalo, Wyoming
Multiple 2018-01-12 ValidFAA registration status code V: Valid registration. All codes
N262E Hare Walter G
LONG EZ
Fixed-wing, single engine 349 Ez LLC
Yakima, Washington
Experimental 2018-01-12 ValidFAA registration status code V: Valid registration. All codes
N46677 Cessna
172K
Fixed-wing, single engine Individual owner
New Hampshire
Standard 2018-01-12 ValidFAA registration status code V: Valid registration. All codes
N7065G Cessna
172K
Fixed-wing, single engine Individual owner
Colorado
Standard 2018-01-12 ValidFAA registration status code V: Valid registration. All codes
N79264 Cessna
172K
Fixed-wing, single engine Co-owned owner
Missouri
Standard 2018-01-12 ValidFAA registration status code V: Valid registration. All codes
N81149 Piper
PA-28-161
Fixed-wing, single engine Fly By Knight INC
Hammond, Louisiana
Standard 2018-01-12 ValidFAA registration status code V: Valid registration. All codes
N86892 Bellanca
7GCAA
Fixed-wing, single engine Individual owner
Tennessee
Standard 2018-01-12 ValidFAA registration status code V: Valid registration. All codes
N96SC Piper
PA-18-150
Fixed-wing, single engine Co-owned owner
California
Standard 2018-01-12 ValidFAA registration status code V: Valid registration. All codes
N9831G Cessna
172N
Fixed-wing, single engine Individual owner
Illinois
Standard 2018-01-12 ValidFAA registration status code V: Valid registration. All codes
N1945F Cessna
172N
Fixed-wing, single engine Raven Aviation LLC
Lagrangeville, New York
Standard 2018-01-11 ValidFAA registration status code V: Valid registration. All codes
N5281W Piper
PA-28-160
Fixed-wing, single engine Individual owner
Georgia
Standard 2018-01-11 ValidFAA registration status code V: Valid registration. All codes
N52891 Cessna
172P
Fixed-wing, single engine
Standard 2018-01-11 ValidFAA registration status code V: Valid registration. All codes
N5343F Piper
PA-28-151
Fixed-wing, single engine Trident Aircraft Leasing LLC
Easton, Maryland
Standard 2018-01-11 ValidFAA registration status code V: Valid registration. All codes
N65275 Cessna
172P
Fixed-wing, single engine
Standard 2018-01-11 ValidFAA registration status code V: Valid registration. All codes
N733BD Cessna
172N
Fixed-wing, single engine
Standard 2018-01-11 ValidFAA registration status code V: Valid registration. All codes
N9508B Cessna
172RG
Fixed-wing, single engine
Standard 2018-01-11 ValidFAA registration status code V: Valid registration. All codes
N1909U Piper
PA-28-140
Fixed-wing, single engine Individual owner
Nebraska
Standard 2018-01-10 ValidFAA registration status code V: Valid registration. All codes
N52877 Cessna
172P
Fixed-wing, single engine Co-owned owner
Utah
Standard 2018-01-09 ValidFAA registration status code V: Valid registration. All codes
N5940D Piper
PA-22-150
Fixed-wing, single engine Runnin Rabbit LLC
Kalispell, Montana
Standard 2018-01-09 ValidFAA registration status code V: Valid registration. All codes
N172EB Cessna
172M
Fixed-wing, single engine Co-owned owner
Alaska
Standard 2018-01-08 ValidFAA registration status code V: Valid registration. All codes
N333BT Cessna
172M
Fixed-wing, single engine Individual owner
Texas
Standard 2018-01-08 ValidFAA registration status code V: Valid registration. All codes
N4013E Piper
PA-18-150
Fixed-wing, single engine Individual owner
Maine
Standard 2018-01-08 ValidFAA registration status code V: Valid registration. All codes
N5149X Champion
7GCBC
Fixed-wing, single engine Individual owner
Alaska
Restricted 2018-01-08 ValidFAA registration status code V: Valid registration. All codes
N6256G Cessna
172N
Fixed-wing, single engine Individual owner
Oregon
Standard 2018-01-08 ValidFAA registration status code V: Valid registration. All codes
N761W Wood
PL-2
Fixed-wing, single engine Individual owner
Florida
Experimental 2018-01-08 ValidFAA registration status code V: Valid registration. All codes
N777VX Piper
PA-28-140
Fixed-wing, single engine Individual owner
California
Standard 2018-01-08 ValidFAA registration status code V: Valid registration. All codes
N1115U Cessna
172M
Fixed-wing, single engine Avian Leasing LLC
Bremerton, Washington
Standard 2018-01-05 ValidFAA registration status code V: Valid registration. All codes
N13205 Cessna
172M
Fixed-wing, single engine Co-owned owner
Alaska
Standard 2018-01-05 ValidFAA registration status code V: Valid registration. All codes
N4391J Piper
PA-28-140
Fixed-wing, single engine Avian Leasing LLC
Bremerton, Washington
Standard 2018-01-05 ValidFAA registration status code V: Valid registration. All codes
N46203 Cessna
172I
Fixed-wing, single engine Avian Leasing LLC
Bremerton, Washington
Standard 2018-01-05 ValidFAA registration status code V: Valid registration. All codes
N4876G Cessna
172N
Fixed-wing, single engine Individual owner
Texas
Standard 2018-01-05 ValidFAA registration status code V: Valid registration. All codes
N6BQ Beard Bradley A
LANCAIR 320
Fixed-wing, single engine Individual owner
California
Experimental 2018-01-05 ValidFAA registration status code V: Valid registration. All codes
N7122G Cessna
172K
Fixed-wing, single engine Birmingham Flight Center LLC
Birmingham, Alabama
Standard 2018-01-05 ValidFAA registration status code V: Valid registration. All codes
N7963G Cessna
172L
Fixed-wing, single engine Avian Leasing LLC
Bremerton, Washington
Standard 2018-01-05 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.