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
N79448 Cessna
172K
Fixed-wing, single engine Individual owner
Louisiana
Standard 2013-10-22 ValidFAA registration status code V: Valid registration. All codes
N8613D Piper
PA-22-160
Fixed-wing, single engine Individual owner
Texas
Standard 2013-10-22 ValidFAA registration status code V: Valid registration. All codes
N12148 Cessna
172M
Fixed-wing, single engine Co-owned owner
Wisconsin
Standard 2013-10-21 ValidFAA registration status code V: Valid registration. All codes
N272DB Cessna
172M
Fixed-wing, single engine Individual owner
Florida
Standard 2013-10-18 ValidFAA registration status code V: Valid registration. All codes
N3462T Cessna
177
Fixed-wing, single engine Individual owner
Missouri
Standard 2013-10-18 ValidFAA registration status code V: Valid registration. All codes
N7192Q Cessna
172L
Fixed-wing, single engine Mansfield Heliflight INC
Milton, Vermont
Standard 2013-10-18 ValidFAA registration status code V: Valid registration. All codes
N75162 Piper
PA-28-151
Fixed-wing, single engine Individual owner
California
Standard 2013-10-18 ValidFAA registration status code V: Valid registration. All codes
N142VP Piper
PA-23-160
Fixed-wing, multi-engine Individual owner
Massachusetts
Standard 2013-09-27 ValidFAA registration status code V: Valid registration. All codes
N53351 Cessna
172P
Fixed-wing, single engine Clover Park Technical College
Lakewood, Washington
Standard 2013-09-25 ValidFAA registration status code V: Valid registration. All codes
N52139 Cessna
172P
Fixed-wing, single engine Mann Aviation INC
Long Beach, California
Standard 2013-09-23 ValidFAA registration status code V: Valid registration. All codes
N12561 Cessna
172M
Fixed-wing, single engine Individual owner
Texas
Standard 2013-09-20 ValidFAA registration status code V: Valid registration. All codes
N7108D Piper
PA-22-150
Fixed-wing, single engine Western Antique Aeroplane & Automobile Museum
Hood River, Oregon
Standard 2013-09-20 ValidFAA registration status code V: Valid registration. All codes
N75805 Cessna
172N
Fixed-wing, single engine Individual owner
Oregon
Standard 2013-09-20 ValidFAA registration status code V: Valid registration. All codes
N9575U Grumman American Avn. Corp.
AA-5A
Fixed-wing, single engine Individual owner
Texas
Standard 2013-09-20 ValidFAA registration status code V: Valid registration. All codes
N14315 Piper
PA-18-150
Fixed-wing, single engine Orion Works LTD
Denali Park, Alaska
Standard 2013-09-18 ValidFAA registration status code V: Valid registration. All codes
N30522 Cessna
172M
Fixed-wing, single engine Individual owner
Oklahoma
Standard 2013-09-18 ValidFAA registration status code V: Valid registration. All codes
N79284 Cessna
172K
Fixed-wing, single engine Individual owner
North Carolina
Restricted 2013-09-18 ValidFAA registration status code V: Valid registration. All codes
N84740 Cessna
172K
Fixed-wing, single engine Dark River Capital LLC
Lebanon, Ohio
Standard 2013-09-18 ValidFAA registration status code V: Valid registration. All codes
N9997U Grumman American Avn. Corp.
AA-5A
Fixed-wing, single engine Co-owned owner
Massachusetts
Standard 2013-09-18 ValidFAA registration status code V: Valid registration. All codes
N323SM Cessna
172L
Fixed-wing, single engine American Patrols INC
Midland, Texas
Standard 2013-09-17 ValidFAA registration status code V: Valid registration. All codes
N466PG Good
RV-6
Fixed-wing, single engine Individual owner
Virginia
Experimental 2013-09-17 ValidFAA registration status code V: Valid registration. All codes
N1221T Cessna
172L
Fixed-wing, single engine Individual owner
Maryland
Standard 2013-09-16 ValidFAA registration status code V: Valid registration. All codes
N32735 Piper
PA-28-151
Fixed-wing, single engine Individual owner
Mississippi
Standard 2013-09-16 ValidFAA registration status code V: Valid registration. All codes
N477LL Piper
PA-18-150
Fixed-wing, single engine Lima Lima LLC
Lander, Wyoming
Standard 2013-09-13 ValidFAA registration status code V: Valid registration. All codes
N83275 Piper
PA-18-150
Fixed-wing, single engine Co-owned owner
Oregon
Standard 2013-09-13 ValidFAA registration status code V: Valid registration. All codes
N32SH Robinson Helicopter
R22 BETA
Helicopter Individual owner
Texas
Standard 2013-09-12 ValidFAA registration status code V: Valid registration. All codes
N40042 Piper
PA-28-161
Fixed-wing, single engine Volar CORP
El Cajon, California
Standard 2013-09-12 ValidFAA registration status code V: Valid registration. All codes
N8461W Piper
PA-28-161
Fixed-wing, single engine Individual owner
Texas
Standard 2013-09-12 ValidFAA registration status code V: Valid registration. All codes
N7439R Piper
PA-28-140
Fixed-wing, single engine Vetter Aviation Interests LLC
Lakeville, Minnesota
Standard 2013-09-10 ValidFAA registration status code V: Valid registration. All codes
N131LR Piper
PA-28-140
Fixed-wing, single engine Charles City Aeronautics INC
Charles City, Iowa
Standard 2013-09-09 ValidFAA registration status code V: Valid registration. All codes
N199 Piper
PA-28-140
Fixed-wing, single engine Earth & Air LLC
Thompson Falls, Montana
Standard 2013-09-09 ValidFAA registration status code V: Valid registration. All codes
N2464P Piper
PA-22-150
Fixed-wing, single engine Individual owner
Washington
Standard 2013-09-09 ValidFAA registration status code V: Valid registration. All codes
N41963 Piper
PA-28-140
Fixed-wing, single engine Individual owner
Delaware
Standard 2013-09-09 ValidFAA registration status code V: Valid registration. All codes
N605HA Robinson Helicopter
R22 ALPHA
Helicopter Emerald City Aircraft Leasing INC
Port Orchard, Washington
Standard 2013-09-09 ValidFAA registration status code V: Valid registration. All codes
N7685D Piper
PA-18A 150
Fixed-wing, single engine Individual owner
Alaska
Restricted 2013-09-09 ValidFAA registration status code V: Valid registration. All codes
N75382 Piper
PA-28-151
Fixed-wing, single engine FAA Flying Club INC
Springfield, Virginia
Standard 2013-09-06 ValidFAA registration status code V: Valid registration. All codes
N9748U Grumman American Avn. Corp.
AA-5A
Fixed-wing, single engine Quiet Birdmen LLC
Lanoka Harbor, New Jersey
Standard 2013-09-06 ValidFAA registration status code V: Valid registration. All codes
N7234Q Cessna
172L
Fixed-wing, single engine Individual owner
New York
Standard 2013-09-05 ValidFAA registration status code V: Valid registration. All codes
N7678D Piper
PA-18A 150
Fixed-wing, single engine Individual owner
Alaska
Multiple 2013-09-05 ValidFAA registration status code V: Valid registration. All codes
N2291H Piper
PA-28-161
Fixed-wing, single engine Command Aviation
Bellingham, Washington
Standard 2013-09-04 ValidFAA registration status code V: Valid registration. All codes
N459PS Smith William D
SMITH SPECIAL PS 1
Fixed-wing, single engine Individual owner
Indiana
Experimental 2013-09-04 ValidFAA registration status code V: Valid registration. All codes
N500TF Cessna
172N
Fixed-wing, single engine Pine Bluff Police Department
Pine Bluff, Arkansas
Standard 2013-09-04 ValidFAA registration status code V: Valid registration. All codes
N5756Y Piper
PA-18-150
Fixed-wing, single engine Individual owner
California
Standard 2013-09-04 ValidFAA registration status code V: Valid registration. All codes
N737AM Cessna
172N
Fixed-wing, single engine California Aviation Services INC
Riverside, California
Standard 2013-09-04 ValidFAA registration status code V: Valid registration. All codes
N9849L Cessna
172P
Fixed-wing, single engine Dynasty Adventure INC
Wilmington, Delaware
Standard 2013-09-04 ValidFAA registration status code V: Valid registration. All codes
N362BL Cessna
172N
Fixed-wing, single engine Individual owner
New York
Standard 2013-09-03 ValidFAA registration status code V: Valid registration. All codes
N73338 Cessna
172M
Fixed-wing, single engine Einarson Flying Service
Intl Falls, Minnesota
Standard 2013-09-03 ValidFAA registration status code V: Valid registration. All codes
N727FL Piper
PA-28-140
Fixed-wing, single engine Individual owner
California
Standard 2013-08-30 ValidFAA registration status code V: Valid registration. All codes
N9910Q Cessna
172M
Fixed-wing, single engine Individual owner
Kansas
Standard 2013-08-30 ValidFAA registration status code V: Valid registration. All codes
N32JV Voyles
VOYLES MUSTANG II
Fixed-wing, single engine Individual owner
Ohio
Experimental 2013-08-29 ValidFAA registration status code V: Valid registration. All codes
N3447P Piper
PA-23-160
Fixed-wing, multi-engine Individual owner
Virginia
Standard 2013-08-29 ValidFAA registration status code V: Valid registration. All codes
N5524W Piper
PA-28-150
Fixed-wing, single engine Individual owner
Virginia
Standard 2013-08-29 ValidFAA registration status code V: Valid registration. All codes
N6850Z Piper
PA-18-150
Fixed-wing, single engine Wagner Construction INC
Intl Falls, Minnesota
Multiple 2013-08-29 ValidFAA registration status code V: Valid registration. All codes
N2150F Piper
PA-28-161
Fixed-wing, single engine Shoreline Aviation INC
Marshfield, Massachusetts
Standard 2013-08-28 ValidFAA registration status code V: Valid registration. All codes
N410RD Piper
PA-18-150
Fixed-wing, single engine Individual owner
Florida
Standard 2013-08-28 ValidFAA registration status code V: Valid registration. All codes
N4615R Piper
PA-28-140
Fixed-wing, single engine Individual owner
Massachusetts
Standard 2013-08-28 ValidFAA registration status code V: Valid registration. All codes
N225QZ Champion
7GCBC
Fixed-wing, single engine Individual owner
Utah
Standard 2013-08-27 ValidFAA registration status code V: Valid registration. All codes
N5041Z Piper
PA-18
Fixed-wing, single engine Co-owned owner
Minnesota
Standard 2013-08-26 ValidFAA registration status code V: Valid registration. All codes
N733SL Cessna
172N
Fixed-wing, single engine Individual owner
Texas
Standard 2013-08-26 ValidFAA registration status code V: Valid registration. All codes
N7900G Cessna
172L
Fixed-wing, single engine Great Plains Enterprises LLC
Wilmington, Ohio
Standard 2013-08-26 ValidFAA registration status code V: Valid registration. All codes
N805GS Sloan Gene Jr
THORP T-18
Fixed-wing, single engine Individual owner
Tennessee
Experimental 2013-08-26 ValidFAA registration status code V: Valid registration. All codes
N8755A Maurer Randall
RV8-160A
Fixed-wing, single engine Bluegrass Aircraft Group LLC
Benton, Kansas
Experimental 2013-08-26 ValidFAA registration status code V: Valid registration. All codes
N3016T Piper
PA-28-161
Fixed-wing, single engine Co-owned owner
California
Standard 2013-08-23 ValidFAA registration status code V: Valid registration. All codes
N65626 Cessna
172P
Fixed-wing, single engine Individual owner
Ohio
Standard 2013-08-23 ValidFAA registration status code V: Valid registration. All codes
N7522R Piper
PA-28-140
Fixed-wing, single engine Red Baron Flying Club LLC
Oneida, New York
Standard 2013-08-23 ValidFAA registration status code V: Valid registration. All codes
N6091L Grumman American Avn. Corp.
AA-5
Fixed-wing, single engine Individual owner
New York
Standard 2013-08-22 ValidFAA registration status code V: Valid registration. All codes
N624SE Piper
PA-18-150
Fixed-wing, single engine Prysi Mary H
Dundee, Ohio
Standard 2013-08-22 ValidFAA registration status code V: Valid registration. All codes
N5124R Cessna
172M
Fixed-wing, single engine Individual owner
Texas
Standard 2013-08-21 ValidFAA registration status code V: Valid registration. All codes
N9696L Cessna
172P
Fixed-wing, single engine Any Border LLC
Yankton, South Dakota
Standard 2013-08-21 ValidFAA registration status code V: Valid registration. All codes
N7138D Piper
PA-22-150
Fixed-wing, single engine Individual owner
Michigan
Standard 2013-08-20 ValidFAA registration status code V: Valid registration. All codes
N4131Z Piper
PA-18-150
Fixed-wing, single engine Individual owner
Alaska
Multiple 2013-08-16 ValidFAA registration status code V: Valid registration. All codes
N5260W Piper
PA-28
Fixed-wing, single engine Individual owner
Texas
Standard 2013-08-16 ValidFAA registration status code V: Valid registration. All codes
N7155L Grumman American Avn. Corp.
AA-5
Fixed-wing, single engine Individual owner
California
Standard 2013-08-16 ValidFAA registration status code V: Valid registration. All codes
N733ZE Cessna
172N
Fixed-wing, single engine Kgr Aviation LLC
Austin, Texas
Standard 2013-08-16 ValidFAA registration status code V: Valid registration. All codes
N5039L Bellanca
7GCBC
Fixed-wing, single engine Greyhawk Aviation LLC
Erie, Colorado
Standard 2013-08-15 ValidFAA registration status code V: Valid registration. All codes
N61839 Cessna
172M
Fixed-wing, single engine Co-owned owner
Minnesota
Standard 2013-08-15 ValidFAA registration status code V: Valid registration. All codes
N41937 Piper
PA-28-151
Fixed-wing, single engine Calumet Aero LLC
Crown Point, Indiana
Standard 2013-08-14 ValidFAA registration status code V: Valid registration. All codes
N444ZZ Robinson Helicopter
R22 BETA
Helicopter Emerald City Aircraft Leasing INC
Port Orchard, Washington
Standard 2013-08-13 ValidFAA registration status code V: Valid registration. All codes
N73660 Cessna
172N
Fixed-wing, single engine Individual owner
Oklahoma
Standard 2013-08-13 ValidFAA registration status code V: Valid registration. All codes
N748HH Robinson Helicopter
R22 BETA
Helicopter Emerald City Aircraft Leasing INC
Port Orchard, Washington
Standard 2013-08-13 ValidFAA registration status code V: Valid registration. All codes
N80142 Robinson Helicopter
R22 BETA
Helicopter Emerald City Aircraft Leasing INC
Port Orchard, Washington
Standard 2013-08-13 ValidFAA registration status code V: Valid registration. All codes
N8038A Robinson Helicopter
R22 BETA
Helicopter Emerald City Aircraft Leasing INC
Port Orchard, Washington
Standard 2013-08-13 ValidFAA registration status code V: Valid registration. All codes
N8045K Robinson Helicopter
R22 BETA
Helicopter Emerald City Aircraft Leasing INC
Port Orchard, Washington
Standard 2013-08-13 ValidFAA registration status code V: Valid registration. All codes
N8416J Robinson Helicopter
R22
Helicopter Emerald City Aircraft Leasing INC
Port Orchard, Washington
Standard 2013-08-13 ValidFAA registration status code V: Valid registration. All codes
N19609 Cessna
172L
Fixed-wing, single engine Individual owner
Florida
Standard 2013-08-12 ValidFAA registration status code V: Valid registration. All codes
N337GF Cessna
172K
Fixed-wing, single engine Individual owner
Florida
Standard 2013-08-12 ValidFAA registration status code V: Valid registration. All codes
N3939Z Piper
PA-18-150
Fixed-wing, single engine Individual owner
Nebraska
Standard 2013-08-12 ValidFAA registration status code V: Valid registration. All codes
N75164 Piper
PA-28-151
Fixed-wing, single engine Individual owner
Arizona
Standard 2013-08-12 ValidFAA registration status code V: Valid registration. All codes
N8120X Piper
PA-28-161
Fixed-wing, single engine Individual owner
Mississippi
Standard 2013-08-12 ValidFAA registration status code V: Valid registration. All codes
N377HG American Champion Aircraft
7GCBC
Fixed-wing, single engine Individual owner
Pennsylvania
Standard 2013-08-09 ValidFAA registration status code V: Valid registration. All codes
N4124E Piper
PA-18-150
Fixed-wing, single engine Individual owner
South Dakota
Standard 2013-08-09 ValidFAA registration status code V: Valid registration. All codes
N557SW Piper
PA-28-140
Fixed-wing, single engine Individual owner
Michigan
Standard 2013-08-09 ValidFAA registration status code V: Valid registration. All codes
N478LC Lawler Christopher
PITTS S1S
Fixed-wing, single engine Individual owner
Pennsylvania
Experimental 2013-08-08 ValidFAA registration status code V: Valid registration. All codes
N64053 Cessna
172M
Fixed-wing, single engine Co-owned owner
Massachusetts
Standard 2013-08-08 ValidFAA registration status code V: Valid registration. All codes
N881WA Cessna
172K
Fixed-wing, single engine Individual owner
Washington
Standard 2013-08-08 ValidFAA registration status code V: Valid registration. All codes
N3410T Cessna
177
Fixed-wing, single engine Individual owner
California
Standard 2013-08-06 ValidFAA registration status code V: Valid registration. All codes
N36276 Piper
PA-28-161
Fixed-wing, single engine Individual owner
Wisconsin
Standard 2013-08-06 ValidFAA registration status code V: Valid registration. All codes
N32847 Piper
PA-28-151
Fixed-wing, single engine International Air Services INC Trustee
Carson City, Nevada
Standard 2013-08-05 ValidFAA registration status code V: Valid registration. All codes
N21553 Cessna
172M
Fixed-wing, single engine Individual owner
Michigan
Standard 2013-08-02 ValidFAA registration status code V: Valid registration. All codes
N3177 Cessna
177
Fixed-wing, single engine Individual owner
Ohio
Standard 2013-08-02 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 8, 2026. Horsepower and thrust are the FAA's figures for the series, not for a particular aircraft.