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
N4221Q Cessna
172L
Fixed-wing, single engine Withheld at owner's request
Standard 2023-09-07 ValidFAA registration status code V: Valid registration. All codes
N61759 Cessna
172M
Fixed-wing, single engine Individual owner
Georgia
Standard 2023-09-07 ValidFAA registration status code V: Valid registration. All codes
N12LT Thorp T-18
171
Fixed-wing, single engine Individual owner
North Carolina
Experimental 2023-09-06 ValidFAA registration status code V: Valid registration. All codes
N1927L Beech
B19
Fixed-wing, single engine Individual owner
Alaska
Standard 2023-09-06 ValidFAA registration status code V: Valid registration. All codes
N343AA Piper
PA-18-150
Fixed-wing, single engine Individual owner
Texas
Standard 2023-09-06 ValidFAA registration status code V: Valid registration. All codes
N4189P Piper
PA-23-160
Fixed-wing, multi-engine Individual owner
Hawaii
Standard 2023-09-06 ValidFAA registration status code V: Valid registration. All codes
N57331 Piper
PA-28-140
Fixed-wing, single engine Jmj Aviation LLC
Kalispell, Montana
Standard 2023-09-06 ValidFAA registration status code V: Valid registration. All codes
N64260 Cessna
172M
Fixed-wing, single engine Co-owned owner
Tennessee
Standard 2023-09-06 ValidFAA registration status code V: Valid registration. All codes
N7097R Piper
PA-28-140
Fixed-wing, single engine Co-owned owner
Tennessee
Standard 2023-09-06 ValidFAA registration status code V: Valid registration. All codes
N7119B Piper
PA-22-150
Fixed-wing, single engine Individual owner
Texas
Standard 2023-09-06 ValidFAA registration status code V: Valid registration. All codes
N72DE Ekstrom Dave
TWINSTARR
Rotorcraft Individual owner
Indiana
Experimental 2023-09-06 ValidFAA registration status code V: Valid registration. All codes
N8085A Piper
PA-28-161
Fixed-wing, single engine Lane Community College
Eugene, Oregon
Standard 2023-09-06 ValidFAA registration status code V: Valid registration. All codes
N84036 Cessna
172K
Fixed-wing, single engine Wings Over Texas Holdings LLC
Denton, Texas
Standard 2023-09-06 ValidFAA registration status code V: Valid registration. All codes
N85TX Akin Billy D
BA-1
Fixed-wing, single engine Co-owned owner
Texas
Experimental 2023-09-06 ValidFAA registration status code V: Valid registration. All codes
N9500W Piper
PA-28-140
Fixed-wing, single engine Co-owned owner
Alabama
Standard 2023-09-06 ValidFAA registration status code V: Valid registration. All codes
N9547K Piper
PA-28-151
Fixed-wing, single engine Individual owner
California
Standard 2023-09-06 ValidFAA registration status code V: Valid registration. All codes
N126F Thrash Frank J
SA100
Fixed-wing, single engine Co-owned owner
Kansas
Experimental 2023-09-05 ValidFAA registration status code V: Valid registration. All codes
N126NS Robinson Helicopter
R22 BETA
Helicopter Helileasing INC
Las Vegas, Nevada
Standard 2023-09-05 ValidFAA registration status code V: Valid registration. All codes
N1572X Piper
PA-28-151
Fixed-wing, single engine Raleigh Flying Club LLC
Raleigh, North Carolina
Standard 2023-09-05 ValidFAA registration status code V: Valid registration. All codes
N2349Z Beech
23
Fixed-wing, single engine Individual owner
Georgia
Standard 2023-09-05 ValidFAA registration status code V: Valid registration. All codes
N3821K Piper
PA-28-140
Fixed-wing, single engine Soar Above Flight Solutions LLC
Englewood, Tennessee
Standard 2023-09-05 ValidFAA registration status code V: Valid registration. All codes
N7040R Piper
PA-28-140
Fixed-wing, single engine Individual owner
Texas
Standard 2023-09-05 ValidFAA registration status code V: Valid registration. All codes
N8153C Robinson Helicopter
R22 BETA
Helicopter Helileasing INC
Las Vegas, Nevada
Standard 2023-09-05 ValidFAA registration status code V: Valid registration. All codes
N821GM Piper
PA-23-160
Fixed-wing, multi-engine Hoosier Aviation LLC
Terre Haute, Indiana
Standard 2023-09-05 ValidFAA registration status code V: Valid registration. All codes
N904PW Cessna
172K
Fixed-wing, single engine Jax Beach Aviation LLC
Jacksonville, Florida
Standard 2023-09-05 ValidFAA registration status code V: Valid registration. All codes
N989JB Bigham Jack L
MONTANA COYOTE
Fixed-wing, single engine Individual owner
California
Experimental 2023-09-05 ValidFAA registration status code V: Valid registration. All codes
N20026 Cessna
172M
Fixed-wing, single engine Individual owner
Maryland
Standard 2023-09-04 ValidFAA registration status code V: Valid registration. All codes
N2808P Piper
PA-22-150
Fixed-wing, single engine Valiair Limited CO Trustee
Casper, Wyoming
Standard 2023-09-04 ValidFAA registration status code V: Valid registration. All codes
N492LG Gulfstream American Corp
AA-5A
Fixed-wing, single engine Sunday Punchers LLC
Monrovia, Indiana
Standard 2023-09-04 ValidFAA registration status code V: Valid registration. All codes
N5229D Cessna
172N
Fixed-wing, single engine Co-owned owner
Georgia
Standard 2023-09-04 ValidFAA registration status code V: Valid registration. All codes
N5463K Cessna
172P
Fixed-wing, single engine Rick Aviation INC
Newport News, Virginia
Standard 2023-09-04 ValidFAA registration status code V: Valid registration. All codes
N6461R Piper
PA-28-140
Fixed-wing, single engine Betsy N6461R LLC
Novato, California
Standard 2023-09-04 ValidFAA registration status code V: Valid registration. All codes
N6527T Beech
19A
Fixed-wing, single engine Individual owner
Michigan
Standard 2023-09-04 ValidFAA registration status code V: Valid registration. All codes
N734VQ Cessna
172N
Fixed-wing, single engine Jprg Aviation INC
Orlando, Florida
Standard 2023-09-04 ValidFAA registration status code V: Valid registration. All codes
N7542G Cessna
172L
Fixed-wing, single engine Individual owner
Alabama
Standard 2023-09-04 ValidFAA registration status code V: Valid registration. All codes
N5619W Piper
PA-28-160
Fixed-wing, single engine Individual owner
Arizona
Standard 2023-09-03 ValidFAA registration status code V: Valid registration. All codes
N84289 Cessna
172K
Fixed-wing, single engine Individual owner
Illinois
Standard 2023-09-03 ValidFAA registration status code V: Valid registration. All codes
N8848N Piper
PA-28-140
Fixed-wing, single engine Pro Tech Aviation LLC
Corona, California
Standard 2023-09-03 ValidFAA registration status code V: Valid registration. All codes
N9063D Piper
PA-18A 150
Fixed-wing, single engine Co-owned owner
Montana
Standard 2023-09-03 ValidFAA registration status code V: Valid registration. All codes
N20591 Cessna
172M
Fixed-wing, single engine Individual owner
California
Standard 2023-09-02 ValidFAA registration status code V: Valid registration. All codes
N4000M Beech
23
Fixed-wing, single engine Donair LLC
Enid, Oklahoma
Standard 2023-09-02 ValidFAA registration status code V: Valid registration. All codes
N44105 Piper
PA-28-140
Fixed-wing, single engine Lyman Ashlee B
Delta, Utah
Standard 2023-09-02 ValidFAA registration status code V: Valid registration. All codes
N5033K Bellanca
7GCAA
Fixed-wing, single engine Individual owner
Wisconsin
Standard 2023-09-02 ValidFAA registration status code V: Valid registration. All codes
N5507L Grumman American Avn. Corp.
AA-5
Fixed-wing, single engine Individual owner
Wisconsin
Standard 2023-09-02 ValidFAA registration status code V: Valid registration. All codes
N73573 Cessna
172M
Fixed-wing, single engine Co-owned owner
Texas
Standard 2023-09-02 ValidFAA registration status code V: Valid registration. All codes
N78VL Grumman American Avn. Corp.
AA-5A
Fixed-wing, single engine Co-owned owner
California
Standard 2023-09-02 ValidFAA registration status code V: Valid registration. All codes
N8059D Piper
PA-22-150
Fixed-wing, single engine Individual owner
Michigan
Standard 2023-09-02 ValidFAA registration status code V: Valid registration. All codes
N81FB Bright Fritz B
GLASSIAR SH-2TD
Fixed-wing, single engine Individual owner
South Carolina
Experimental 2023-09-02 ValidFAA registration status code V: Valid registration. All codes
N90993 Bellanca
7GCBC
Fixed-wing, single engine Individual owner
Texas
Standard 2023-09-02 ValidFAA registration status code V: Valid registration. All codes
N999J Frey
EAA ACRO SPORT
Fixed-wing, single engine Individual owner
Michigan
Experimental 2023-09-02 ValidFAA registration status code V: Valid registration. All codes
N1337T Piper
PA-28-140
Fixed-wing, single engine Co-owned owner
Delaware
Standard 2023-09-01 ValidFAA registration status code V: Valid registration. All codes
N1449E Cessna
172N
Fixed-wing, single engine Individual owner
South Carolina
Standard 2023-09-01 ValidFAA registration status code V: Valid registration. All codes
N3912M Piper
PA-28-161
Fixed-wing, single engine Gateway Flight Training LLC
Saint Louis, Missouri
Standard 2023-09-01 ValidFAA registration status code V: Valid registration. All codes
N6522 Robinson Helicopter
R22 BETA
Helicopter Uaa International INC
La Verne, California
Standard 2023-09-01 ValidFAA registration status code V: Valid registration. All codes
N733PN Cessna
172N
Fixed-wing, single engine Aerospring Leasing LLC DBA
Wasilla, Alaska
Standard 2023-09-01 ValidFAA registration status code V: Valid registration. All codes
N835SW Piper
PA-18A 150
Fixed-wing, single engine Individual owner
Texas
Restricted 2023-09-01 ValidFAA registration status code V: Valid registration. All codes
N12976 Cessna
172M
Fixed-wing, single engine Wanda Collins Professional Pilot Services LLC
Madisonville, Texas
Standard 2023-08-31 ValidFAA registration status code V: Valid registration. All codes
N80484 Cessna
172M
Fixed-wing, single engine Mor Aviation 172M LLC
Gaithersburg, Maryland
Standard 2023-08-31 ValidFAA registration status code V: Valid registration. All codes
N92595 Cessna
172M
Fixed-wing, single engine Bearfight Aviation LLC
Dover, Delaware
Standard 2023-08-31 ValidFAA registration status code V: Valid registration. All codes
N1886V Cessna
172M
Fixed-wing, single engine Angelone INC
Elkhart, Indiana
Standard 2023-08-30 ValidFAA registration status code V: Valid registration. All codes
N20301 Cessna
172M
Fixed-wing, single engine Co-owned owner
Wisconsin
Multiple 2023-08-30 ValidFAA registration status code V: Valid registration. All codes
N218PP Cessna
172M
Fixed-wing, single engine Individual owner
Virginia
Standard 2023-08-30 ValidFAA registration status code V: Valid registration. All codes
N2544S Piper
PA-18-150
Fixed-wing, single engine Sunrise Adventures LLC
Stillwater, Minnesota
Standard 2023-08-30 ValidFAA registration status code V: Valid registration. All codes
N4199J Piper
PA-28-140
Fixed-wing, single engine Co-owned owner
Washington
Standard 2023-08-30 ValidFAA registration status code V: Valid registration. All codes
N4439A Piper
PA-22-150
Fixed-wing, single engine Individual owner
Ohio
Standard 2023-08-30 ValidFAA registration status code V: Valid registration. All codes
N5188H Piper
PA-14
Fixed-wing, single engine Individual owner
Alaska
Standard 2023-08-30 ValidFAA registration status code V: Valid registration. All codes
N665DW Piper
PA-18-150
Fixed-wing, single engine Gc General Aviation LLC
Madison, New Jersey
Standard 2023-08-30 ValidFAA registration status code V: Valid registration. All codes
N7284G Cessna
172K
Fixed-wing, single engine Fisher Global LLC
Faulkner, Arkansas
Standard 2023-08-30 ValidFAA registration status code V: Valid registration. All codes
N8288E Cessna
172N
Fixed-wing, single engine Individual owner
Alabama
Standard 2023-08-30 ValidFAA registration status code V: Valid registration. All codes
N9301D Piper
PA-22-160
Fixed-wing, single engine Individual owner
Oregon
Standard 2023-08-30 ValidFAA registration status code V: Valid registration. All codes
N9773U Grumman American Avn. Corp.
AA-5A
Fixed-wing, single engine Individual owner
Missouri
Standard 2023-08-30 ValidFAA registration status code V: Valid registration. All codes
N9911U Grumman American Avn. Corp.
AA-5A
Fixed-wing, single engine Sandlapper Venutures INC
Walhalla, South Carolina
Standard 2023-08-30 ValidFAA registration status code V: Valid registration. All codes
N107N Riley
D-16
Fixed-wing, multi-engine Individual owner
Idaho
Standard 2023-08-29 ValidFAA registration status code V: Valid registration. All codes
N2750P Piper
PA-22-150
Fixed-wing, single engine Individual owner
Massachusetts
Standard 2023-08-29 ValidFAA registration status code V: Valid registration. All codes
N2951Z Piper
PA-22-150
Fixed-wing, single engine Individual owner
Washington
Standard 2023-08-29 ValidFAA registration status code V: Valid registration. All codes
N32274 Piper
PA-28-140
Fixed-wing, single engine Co-owned owner
California
Standard 2023-08-29 ValidFAA registration status code V: Valid registration. All codes
N5201E Cessna
172N
Fixed-wing, single engine Individual owner
Florida
Standard 2023-08-29 ValidFAA registration status code V: Valid registration. All codes
N643FL Piper
PA-28-140
Fixed-wing, single engine Individual owner
Wyoming
Standard 2023-08-29 ValidFAA registration status code V: Valid registration. All codes
N771BZ Porter Gene
BREEZY RLU-1
Fixed-wing, single engine One Bz LLC
Clarklake, Michigan
Experimental 2023-08-29 ValidFAA registration status code V: Valid registration. All codes
N8634V Bellanca
7GCBC
Fixed-wing, single engine Individual owner
New Jersey
Multiple 2023-08-29 ValidFAA registration status code V: Valid registration. All codes
N86AK Siegrist Larry L
BUSH CRUISER
Fixed-wing, single engine Individual owner
Alaska
Experimental 2023-08-29 ValidFAA registration status code V: Valid registration. All codes
N930GF Freije George
RV-4
Fixed-wing, single engine Individual owner
Pennsylvania
Experimental 2023-08-29 ValidFAA registration status code V: Valid registration. All codes
N12647 Cessna
172M
Fixed-wing, single engine Individual owner
Washington
Standard 2023-08-28 ValidFAA registration status code V: Valid registration. All codes
N4113X Aero Commander
100
Fixed-wing, single engine Individual owner
Oregon
Standard 2023-08-28 ValidFAA registration status code V: Valid registration. All codes
N4265Q Cessna
172L
Fixed-wing, single engine Parrish Aviation Flight Academy LLC
Southlake, Texas
Standard 2023-08-28 ValidFAA registration status code V: Valid registration. All codes
N528RV Bell Norman Edward
COZY III
Fixed-wing, single engine Individual owner
Nevada
Experimental 2023-08-28 ValidFAA registration status code V: Valid registration. All codes
N6078D Piper
PA-22-150
Fixed-wing, single engine Individual owner
Montana
Standard 2023-08-28 ValidFAA registration status code V: Valid registration. All codes
N6804B Piper
PA-22-150
Fixed-wing, single engine Individual owner
Ohio
Standard 2023-08-28 ValidFAA registration status code V: Valid registration. All codes
N7388D Piper
PA-18A 150
Fixed-wing, single engine Co-owned owner
Alaska
Restricted 2023-08-28 ValidFAA registration status code V: Valid registration. All codes
N9995U Grumman American Avn. Corp.
AA-5A
Fixed-wing, single engine Aero Cats of New Hampshire LLC
Plainfield, New Hampshire
Standard 2023-08-28 ValidFAA registration status code V: Valid registration. All codes
N12577 Cessna
172M
Fixed-wing, single engine Aftcloud INC
Ontario, California
Standard 2023-08-27 ValidFAA registration status code V: Valid registration. All codes
N26825 Gulfstream American Corp
AA-5A
Fixed-wing, single engine Redline Aerospace LLC
Kalispell, Montana
Standard 2023-08-27 ValidFAA registration status code V: Valid registration. All codes
N728WF Piper
PA-28-161
Fixed-wing, single engine Individual owner
Pennsylvania
Standard 2023-08-27 ValidFAA registration status code V: Valid registration. All codes
N79952 Cessna
172K
Fixed-wing, single engine Individual owner
Georgia
Standard 2023-08-27 ValidFAA registration status code V: Valid registration. All codes
N15140 Piper
PA-28-140
Fixed-wing, single engine Co-owned owner
New York
Standard 2023-08-26 ValidFAA registration status code V: Valid registration. All codes
N321KS Cessna
172P
Fixed-wing, single engine Kingsky Flight Academy LLC
Lakeland, Florida
Standard 2023-08-26 ValidFAA registration status code V: Valid registration. All codes
N4557Y Piper
PA-18-150
Fixed-wing, single engine Individual owner
Alaska
Restricted 2023-08-26 ValidFAA registration status code V: Valid registration. All codes
N738S Sargent Joseph G
VANS RV-9A
Fixed-wing, single engine Three Eight Sierra INC
Old Monroe, Missouri
Experimental 2023-08-26 ValidFAA registration status code V: Valid registration. All codes
N8672D Piper
PA-18-150
Fixed-wing, single engine Individual owner
Alaska
Standard 2023-08-26 ValidFAA registration status code V: Valid registration. All codes
N9399D Piper
PA-18-150
Fixed-wing, single engine Individual owner
Alaska
Standard 2023-08-26 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.