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
N102LC Piper
PA-28-140
Fixed-wing, single engine My Technology Services LLC
Miami, Florida
Standard 2024-05-31 ValidFAA registration status code V: Valid registration. All codes
N172SN Cessna
172K
Fixed-wing, single engine Individual owner
Arkansas
Standard 2024-05-31 ValidFAA registration status code V: Valid registration. All codes
N2744J Cessna
172N
Fixed-wing, single engine Ovation Cwa LLC
Prairie du Sac, Wisconsin
Standard 2024-05-31 ValidFAA registration status code V: Valid registration. All codes
N32575 Piper
PA-28-151
Fixed-wing, single engine Mgps Aero LLC
Wilmington, Delaware
Standard 2024-05-31 ValidFAA registration status code V: Valid registration. All codes
N35542 Cessna
172I
Fixed-wing, single engine Individual owner
South Carolina
Standard 2024-05-31 ValidFAA registration status code V: Valid registration. All codes
N4331M Piper
PA-28-161
Fixed-wing, single engine Individual owner
Puerto Rico
Standard 2024-05-31 ValidFAA registration status code V: Valid registration. All codes
N733LY Cessna
172N
Fixed-wing, single engine Long Island Aviators LLC
Seaford, New York
Standard 2024-05-31 ValidFAA registration status code V: Valid registration. All codes
N734MN Cessna
172N
Fixed-wing, single engine Skynick Enterprises INC
Tarzana, California
Standard 2024-05-31 ValidFAA registration status code V: Valid registration. All codes
N788TD Piper
PA-18-150
Fixed-wing, single engine Individual owner
Alaska
Multiple 2024-05-31 ValidFAA registration status code V: Valid registration. All codes
N98477 Cessna
172P
Fixed-wing, single engine Withheld at owner's request
Standard 2024-05-31 ValidFAA registration status code V: Valid registration. All codes
N1118A Grumman American Avn. Corp.
AA-5A
Fixed-wing, single engine Individual owner
California
Standard 2024-05-30 ValidFAA registration status code V: Valid registration. All codes
N118DT Denham J W/Baker W M
THORP
Fixed-wing, single engine Individual owner
Texas
Experimental 2024-05-30 ValidFAA registration status code V: Valid registration. All codes
N272DR Robl Greg
RV-3A
Fixed-wing, single engine Individual owner
Arizona
Experimental 2024-05-30 ValidFAA registration status code V: Valid registration. All codes
N30856 Cessna
177B
Fixed-wing, single engine Co-owned owner
Minnesota
Standard 2024-05-30 ValidFAA registration status code V: Valid registration. All codes
N3880Q Cessna
172L
Fixed-wing, single engine J&J Hangars LLC
Newnan, Georgia
Standard 2024-05-30 ValidFAA registration status code V: Valid registration. All codes
N5348D Cessna
172N
Fixed-wing, single engine Swaz Aviation LLC
Mesa, Arizona
Standard 2024-05-30 ValidFAA registration status code V: Valid registration. All codes
N5956U Piper
PA-28-140
Fixed-wing, single engine Individual owner
Massachusetts
Standard 2024-05-30 ValidFAA registration status code V: Valid registration. All codes
N7332J Piper
PA-28-140
Fixed-wing, single engine Individual owner
Missouri
Standard 2024-05-30 ValidFAA registration status code V: Valid registration. All codes
N733JH Cessna
172N
Fixed-wing, single engine Riverside Flight Academy INC
Riverside, California
Standard 2024-05-30 ValidFAA registration status code V: Valid registration. All codes
N739YR Cessna
172N
Fixed-wing, single engine F&O Flight LLC
Calhoun, Georgia
Multiple 2024-05-30 ValidFAA registration status code V: Valid registration. All codes
N7764G Cessna
172L
Fixed-wing, single engine Triad Aviation Academy LLC
Greensboro, North Carolina
Standard 2024-05-30 ValidFAA registration status code V: Valid registration. All codes
N7970S Sherman Albert
SHERMAN
Fixed-wing, single engine Individual owner
Oregon
Experimental 2024-05-30 ValidFAA registration status code V: Valid registration. All codes
N84170 Cessna
172K
Fixed-wing, single engine Co-owned owner
Georgia
Standard 2024-05-30 ValidFAA registration status code V: Valid registration. All codes
N8429D Piper
PA-22-160
Fixed-wing, single engine Individual owner
Georgia
Standard 2024-05-30 ValidFAA registration status code V: Valid registration. All codes
N20543 Cessna
172M
Fixed-wing, single engine Sierra Delta Aircraft LLC
Kalispell, Montana
Standard 2024-05-29 ValidFAA registration status code V: Valid registration. All codes
N4075P Piper
PA-23-160
Fixed-wing, multi-engine Co-owned owner
Georgia
Standard 2024-05-29 ValidFAA registration status code V: Valid registration. All codes
N74843 Piper
PA-18-150
Fixed-wing, single engine Sky Lines Aerial Ads LLC
North Hampton, New Hampshire
Standard 2024-05-29 ValidFAA registration status code V: Valid registration. All codes
N26380 Grumman American Avn. Corp.
AA-5A
Fixed-wing, single engine Individual owner
Colorado
Standard 2024-05-28 ValidFAA registration status code V: Valid registration. All codes
N3211E Cessna
172N
Fixed-wing, single engine Apm Leasing LLC
Casper, Wyoming
Standard 2024-05-28 ValidFAA registration status code V: Valid registration. All codes
N3542K Piper
PA-28-140
Fixed-wing, single engine Individual owner
North Carolina
Standard 2024-05-28 ValidFAA registration status code V: Valid registration. All codes
N3592P Piper
PA-18-150
Fixed-wing, single engine Individual owner
Washington
Standard 2024-05-28 ValidFAA registration status code V: Valid registration. All codes
N41695 Bellanca
7GCBC
Fixed-wing, single engine Co-owned owner
Montana
Restricted 2024-05-28 ValidFAA registration status code V: Valid registration. All codes
N4383P Piper
PA-23-160
Fixed-wing, multi-engine Individual owner
Missouri
Standard 2024-05-28 ValidFAA registration status code V: Valid registration. All codes
N5063H Cessna
172M
Fixed-wing, single engine Individual owner
Tennessee
Standard 2024-05-28 ValidFAA registration status code V: Valid registration. All codes
N5520D Cessna
172N
Fixed-wing, single engine Individual owner
Washington
Standard 2024-05-28 ValidFAA registration status code V: Valid registration. All codes
N9570U Grumman American Avn. Corp.
AA-5A
Fixed-wing, single engine Co-owned owner
Texas
Standard 2024-05-28 ValidFAA registration status code V: Valid registration. All codes
N187LC American Champion Aircraft
7GCBC
Fixed-wing, single engine Individual owner
South Carolina
Standard 2024-05-27 ValidFAA registration status code V: Valid registration. All codes
N53849 Bellanca
7GCAA
Fixed-wing, single engine Dm Aviation LLC
Colorado Springs, Colorado
Standard 2024-05-27 ValidFAA registration status code V: Valid registration. All codes
N13770 Cessna
172M
Fixed-wing, single engine Countryside Academy
Benton Harbor, Michigan
Standard 2024-05-26 ValidFAA registration status code V: Valid registration. All codes
N4264Q Cessna
172L
Fixed-wing, single engine Individual owner
New Jersey
Standard 2024-05-26 ValidFAA registration status code V: Valid registration. All codes
N927EL Robinson Helicopter
R22 BETA
Helicopter Emerald City Aircraft Leasing INC
Port Orchard, Washington
Standard 2024-05-26 ValidFAA registration status code V: Valid registration. All codes
N955PT Cessna
172M
Fixed-wing, single engine Cappe Investment Group LLC
Homestead, Florida
Standard 2024-05-26 ValidFAA registration status code V: Valid registration. All codes
N12150 Cessna
172M
Fixed-wing, single engine Co-owned owner
Florida
Standard 2024-05-25 ValidFAA registration status code V: Valid registration. All codes
N211PT Cessna
172M
Fixed-wing, single engine Cappe Investment Group LLC
Homestead, Florida
Standard 2024-05-25 ValidFAA registration status code V: Valid registration. All codes
N305PT Cessna
172M
Fixed-wing, single engine Cappe Investment Group LLC
Homestead, Florida
Standard 2024-05-25 ValidFAA registration status code V: Valid registration. All codes
N31GB Bettis Gary W
BETTIS 1
Rotorcraft Individual owner
Colorado
Experimental 2024-05-25 ValidFAA registration status code V: Valid registration. All codes
N42161 Piper
PA-28-140
Fixed-wing, single engine Withheld at owner's request
Standard 2024-05-25 ValidFAA registration status code V: Valid registration. All codes
N511PT Cessna
172M
Fixed-wing, single engine Cappe Investment Group LLC
Homestead, Florida
Standard 2024-05-25 ValidFAA registration status code V: Valid registration. All codes
N6068D Piper
PA-22-150
Fixed-wing, single engine Co-owned owner
Washington
Standard 2024-05-25 ValidFAA registration status code V: Valid registration. All codes
N64157 Cessna
172M
Fixed-wing, single engine Individual owner
Wisconsin
Standard 2024-05-25 ValidFAA registration status code V: Valid registration. All codes
N6ET Grumman American Avn. Corp.
GA-7
Fixed-wing, multi-engine Individual owner
Tennessee
Standard 2024-05-25 ValidFAA registration status code V: Valid registration. All codes
N733TE Cessna
172N
Fixed-wing, single engine Redtail Partners LLC
Moab, Utah
Standard 2024-05-25 ValidFAA registration status code V: Valid registration. All codes
N793PT Cessna
172M
Fixed-wing, single engine Cappe Investment Group LLC
Homestead, Florida
Standard 2024-05-25 ValidFAA registration status code V: Valid registration. All codes
N979PT Cessna
172M
Fixed-wing, single engine Cappe Ivestment Group LLC
Homestead, Florida
Standard 2024-05-25 ValidFAA registration status code V: Valid registration. All codes
N15715 Piper
PA-28-140
Fixed-wing, single engine Pilotronics LLC
Bay Village, Ohio
Standard 2024-05-24 ValidFAA registration status code V: Valid registration. All codes
N913F Brott Marvin
VAN GRUNSVEN
Fixed-wing, single engine Individual owner
Arkansas
Experimental 2024-05-24 ValidFAA registration status code V: Valid registration. All codes
N130WL Luke Walter
V-STAR
Fixed-wing, single engine Co-owned owner
Georgia
Experimental 2024-05-23 ValidFAA registration status code V: Valid registration. All codes
N2092X Piper
PA-28-161
Fixed-wing, single engine Airx LLC
Warwick, Rhode Island
Standard 2024-05-23 ValidFAA registration status code V: Valid registration. All codes
N25DH Hultquist David
DH-18-205
Fixed-wing, single engine Individual owner
Alaska
Experimental 2024-05-23 ValidFAA registration status code V: Valid registration. All codes
N493SH Cessna
172I
Fixed-wing, single engine Co-owned owner
Minnesota
Standard 2024-05-23 ValidFAA registration status code V: Valid registration. All codes
N511JK Knollenberg John D
VANS RV-6A
Fixed-wing, single engine Individual owner
North Carolina
Experimental 2024-05-23 ValidFAA registration status code V: Valid registration. All codes
N737LK Cessna
172N
Fixed-wing, single engine Total Flight Aircraft Leasing LLC
Apex, North Carolina
Standard 2024-05-23 ValidFAA registration status code V: Valid registration. All codes
N8145V Piper
PA-28-161
Fixed-wing, single engine Ascend Aviation LLC
Bountiful, Utah
Standard 2024-05-23 ValidFAA registration status code V: Valid registration. All codes
N1515J Piper
PA-28-140
Fixed-wing, single engine Individual owner
Arkansas
Standard 2024-05-22 ValidFAA registration status code V: Valid registration. All codes
N2225D Piper
PA-28-161
Fixed-wing, single engine Paphos Airways LLC
Farmingdale, New York
Standard 2024-05-22 ValidFAA registration status code V: Valid registration. All codes
N26132 Piper
PA-28-151
Fixed-wing, single engine Active Pilot Solutions INC
Van Nuys, California
Standard 2024-05-22 ValidFAA registration status code V: Valid registration. All codes
N3092Z Piper
PA-18-150
Fixed-wing, single engine E & K Feeders INC
Emmet, Nebraska
Standard 2024-05-22 ValidFAA registration status code V: Valid registration. All codes
N312LL Thorp
T-18
Fixed-wing, single engine Individual owner
California
Experimental 2024-05-22 ValidFAA registration status code V: Valid registration. All codes
N44929 Piper
PA-28-161
Fixed-wing, single engine Withheld at owner's request
Standard 2024-05-22 ValidFAA registration status code V: Valid registration. All codes
N46495 Cessna
172K
Fixed-wing, single engine Individual owner
Kentucky
Standard 2024-05-22 ValidFAA registration status code V: Valid registration. All codes
N5450L Grumman American Avn. Corp.
AA-5
Fixed-wing, single engine Individual owner
Texas
Standard 2024-05-22 ValidFAA registration status code V: Valid registration. All codes
N739EK Cessna
172N
Fixed-wing, single engine Individual owner
Wyoming
Standard 2024-05-22 ValidFAA registration status code V: Valid registration. All codes
N80575 Cessna
172M
Fixed-wing, single engine Co-owned owner
Oklahoma
Standard 2024-05-22 ValidFAA registration status code V: Valid registration. All codes
N8110C Piper
PA-28-151
Fixed-wing, single engine Individual owner
South Carolina
Standard 2024-05-22 ValidFAA registration status code V: Valid registration. All codes
N8131R Piper
PA-28-161
Fixed-wing, single engine Paphos Airways LLC
Farmingdale, New York
Standard 2024-05-22 ValidFAA registration status code V: Valid registration. All codes
N111CS Piper
PA-18-150
Fixed-wing, single engine Master Wings LLC
Princeton, Kentucky
Standard 2024-05-21 ValidFAA registration status code V: Valid registration. All codes
N2907P Piper
PA-22-150
Fixed-wing, single engine Individual owner
Michigan
Standard 2024-05-21 ValidFAA registration status code V: Valid registration. All codes
N52106 Cessna
172P
Fixed-wing, single engine Simmons Aviation Services LLC
Pawcatuck, Connecticut
Standard 2024-05-21 ValidFAA registration status code V: Valid registration. All codes
N7274J Piper
PA-28-140
Fixed-wing, single engine Fairway Chalet LLC
San Antonio, Texas
Standard 2024-05-21 ValidFAA registration status code V: Valid registration. All codes
N7438D Piper
PA-22-150
Fixed-wing, single engine Individual owner
Montana
Standard 2024-05-21 ValidFAA registration status code V: Valid registration. All codes
N7931V Cessna
172K
Fixed-wing, single engine Co-owned owner
Ohio
Standard 2024-05-21 ValidFAA registration status code V: Valid registration. All codes
N8135D Piper
PA-22-160
Fixed-wing, single engine Individual owner
Alaska
Restricted 2024-05-21 ValidFAA registration status code V: Valid registration. All codes
N8440D Piper
PA-22-160
Fixed-wing, single engine Akn INC
Crystal, Minnesota
Standard 2024-05-21 ValidFAA registration status code V: Valid registration. All codes
N92878 Cessna
172M
Fixed-wing, single engine Co-owned owner
Indiana
Standard 2024-05-21 ValidFAA registration status code V: Valid registration. All codes
N2227Y Cessna
177
Fixed-wing, single engine Individual owner
Florida
Standard 2024-05-20 ValidFAA registration status code V: Valid registration. All codes
N357RJ Piper
PA-18-150
Fixed-wing, single engine Individual owner
South Dakota
Multiple 2024-05-20 ValidFAA registration status code V: Valid registration. All codes
N57456 Bellanca
7GCBC
Fixed-wing, single engine Co-owned owner
Utah
Standard 2024-05-20 ValidFAA registration status code V: Valid registration. All codes
N6232W Piper
PA-28-140
Fixed-wing, single engine N6232W LLC
Rushland, Pennsylvania
Standard 2024-05-20 ValidFAA registration status code V: Valid registration. All codes
N8911V Cessna
172M
Fixed-wing, single engine Horizon Dreams LLC
Homer, Georgia
Standard 2024-05-20 ValidFAA registration status code V: Valid registration. All codes
N99RN Newman Robert C
GLASTAR
Fixed-wing, single engine Individual owner
Mississippi
Experimental 2024-05-20 ValidFAA registration status code V: Valid registration. All codes
N1694J Piper
PA-28-140
Fixed-wing, single engine Individual owner
Arizona
Standard 2024-05-18 ValidFAA registration status code V: Valid registration. All codes
N1JH Cessna
172M
Fixed-wing, single engine Individual owner
Nevada
Standard 2024-05-18 ValidFAA registration status code V: Valid registration. All codes
N32299 Piper
PA-28-151
Fixed-wing, single engine Individual owner
Colorado
Standard 2024-05-18 ValidFAA registration status code V: Valid registration. All codes
N502TM Cessna
172M
Fixed-wing, single engine Draco Flight School INC
Chino, California
Standard 2024-05-18 ValidFAA registration status code V: Valid registration. All codes
N5243R Cessna
172M
Fixed-wing, single engine Draco Flight School INC
Chino, California
Standard 2024-05-18 ValidFAA registration status code V: Valid registration. All codes
N1369R Grumman American Avn. Corp.
AA-5
Fixed-wing, single engine Individual owner
Montana
Standard 2024-05-17 ValidFAA registration status code V: Valid registration. All codes
N2695Z Bellanca
7GCBC
Fixed-wing, single engine Co-owned owner
South Dakota
Restricted 2024-05-17 ValidFAA registration status code V: Valid registration. All codes
N4520R Piper
PA-28-140
Fixed-wing, single engine Individual owner
Florida
Standard 2024-05-17 ValidFAA registration status code V: Valid registration. All codes
N546DK Beech
B19
Fixed-wing, single engine Co-owned owner
Florida
Standard 2024-05-17 ValidFAA registration status code V: Valid registration. All codes
N1910P Piper
PA-22-150
Fixed-wing, single engine Individual owner
Iowa
Standard 2024-05-16 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.