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
N61658 Cessna
172M
Fixed-wing, single engine Nationwide Aviation LLC
Hudson Oaks, Texas
Standard 2024-06-30 ValidFAA registration status code V: Valid registration. All codes
N61813 Cessna
172M
Fixed-wing, single engine Nationwide Aviation LLC
Hudson Oak, Texas
Standard 2024-06-30 ValidFAA registration status code V: Valid registration. All codes
N73192 Cessna
172M
Fixed-wing, single engine Nationwide Aviation LLC
Hudson Oaks, Texas
Standard 2024-06-30 ValidFAA registration status code V: Valid registration. All codes
N73477 Cessna
172M
Fixed-wing, single engine Nationwide Aviation LLC
Hudson Oaks, Texas
Standard 2024-06-30 ValidFAA registration status code V: Valid registration. All codes
N8VY Varga Aircraft Corp.
2150A
Fixed-wing, single engine Individual owner
Texas
Standard 2024-06-30 ValidFAA registration status code V: Valid registration. All codes
N21323 Piper
PA-28-161
Fixed-wing, single engine A2T Guys Aviation LLC
Williamston, Michigan
Standard 2024-06-29 ValidFAA registration status code V: Valid registration. All codes
N2347Z Beech
23
Fixed-wing, single engine Individual owner
New York
Standard 2024-06-29 ValidFAA registration status code V: Valid registration. All codes
N2879Q Cessna
172L
Fixed-wing, single engine Blue Side Aviation LLC
Tampa, Florida
Standard 2024-06-29 ValidFAA registration status code V: Valid registration. All codes
N5513W Piper
PA-28-150
Fixed-wing, single engine Individual owner
North Carolina
Standard 2024-06-29 ValidFAA registration status code V: Valid registration. All codes
N8803 Bellanca
7GCBC
Fixed-wing, single engine Individual owner
Alaska
Standard 2024-06-29 ValidFAA registration status code V: Valid registration. All codes
N19630 Cessna
172L
Fixed-wing, single engine Individual owner
Puerto Rico
Standard 2024-06-28 ValidFAA registration status code V: Valid registration. All codes
N2128C Guice John J
LONG EZ
Fixed-wing, single engine Individual owner
North Carolina
Experimental 2024-06-28 ValidFAA registration status code V: Valid registration. All codes
N4370A Piper
PA-18-150
Fixed-wing, single engine Individual owner
Alaska
Standard 2024-06-28 ValidFAA registration status code V: Valid registration. All codes
N4451A Piper
PA-22-150
Fixed-wing, single engine Individual owner
Alaska
Standard 2024-06-28 ValidFAA registration status code V: Valid registration. All codes
N5854L American
AA-5
Fixed-wing, single engine Individual owner
Louisiana
Standard 2024-06-27 ValidFAA registration status code V: Valid registration. All codes
N7285L Grumman American Avn. Corp.
AA-5
Fixed-wing, single engine Individual owner
Florida
Standard 2024-06-27 ValidFAA registration status code V: Valid registration. All codes
N335DP Robinson Helicopter
R22 BETA
Helicopter Advanced Aviation Group LLC
Frederick, Maryland
Standard 2024-06-26 ValidFAA registration status code V: Valid registration. All codes
N5057T Piper
PA-28-140
Fixed-wing, single engine Individual owner
Florida
Standard 2024-06-26 ValidFAA registration status code V: Valid registration. All codes
N5623U Piper
PA-28-140
Fixed-wing, single engine Individual owner
New Mexico
Standard 2024-06-26 ValidFAA registration status code V: Valid registration. All codes
N7479R Piper
PA-28-140
Fixed-wing, single engine Dnr Solutions LLC
Idaho Falls, Idaho
Standard 2024-06-26 ValidFAA registration status code V: Valid registration. All codes
N7TG Gibbs Timothy R
RV-4
Fixed-wing, single engine Individual owner
Virginia
Experimental 2024-06-26 ValidFAA registration status code V: Valid registration. All codes
N80511 Cessna
172M
Fixed-wing, single engine American Patrols INC
Midland, Texas
Standard 2024-06-26 ValidFAA registration status code V: Valid registration. All codes
N817Z Cessna
172M
Fixed-wing, single engine Individual owner
New York
Standard 2024-06-26 ValidFAA registration status code V: Valid registration. All codes
N95HD Dierks Herman Dietrich Jr
RV-4
Fixed-wing, single engine Individual owner
Louisiana
Experimental 2024-06-26 ValidFAA registration status code V: Valid registration. All codes
N968DH Piper
PA-18-150
Fixed-wing, single engine Alarado Aviation LLC
Chugiak, Alaska
Standard 2024-06-26 ValidFAA registration status code V: Valid registration. All codes
N1550V Cessna
172M
Fixed-wing, single engine Jar Investments LLC
Kalispell, Montana
Standard 2024-06-25 ValidFAA registration status code V: Valid registration. All codes
N1690P Piper
PA-22-150
Fixed-wing, single engine Individual owner
Arkansas
Standard 2024-06-25 ValidFAA registration status code V: Valid registration. All codes
N5722U Piper
PA-28-140
Fixed-wing, single engine Co-owned owner
Kansas
Standard 2024-06-25 ValidFAA registration status code V: Valid registration. All codes
N6757B Piper
PA-22-150
Fixed-wing, single engine Individual owner
Arkansas
Standard 2024-06-25 ValidFAA registration status code V: Valid registration. All codes
N12760 Cessna
172M
Fixed-wing, single engine Individual owner
Colorado
Standard 2024-06-24 ValidFAA registration status code V: Valid registration. All codes
N15504 Piper
PA-28-140
Fixed-wing, single engine N15504 LLC
Eatontown, New Jersey
Standard 2024-06-24 ValidFAA registration status code V: Valid registration. All codes
N200YR Piper
PA-28-151
Fixed-wing, single engine Individual owner
Washington
Standard 2024-06-24 ValidFAA registration status code V: Valid registration. All codes
N2758 Cessna
172M
Fixed-wing, single engine Panair Flying Club INC
Miami, Florida
Standard 2024-06-24 ValidFAA registration status code V: Valid registration. All codes
N295DA Piper
PA-28-140
Fixed-wing, single engine Jackson Construction LLC
Charleston, South Carolina
Standard 2024-06-24 ValidFAA registration status code V: Valid registration. All codes
N3931K Piper
PA-28-140
Fixed-wing, single engine Alpha 1 Aviation LLC
Helena, Alabama
Standard 2024-06-24 ValidFAA registration status code V: Valid registration. All codes
N4312R Cessna
172M
Fixed-wing, single engine Horizon Group INC Trustee
Boca Raton, Florida
Standard 2024-06-24 ValidFAA registration status code V: Valid registration. All codes
N44592 Piper
PA-28-151
Fixed-wing, single engine V V S Implements LLC
Wilmington, Delaware
Standard 2024-06-24 ValidFAA registration status code V: Valid registration. All codes
N54479 Piper
PA-28-140
Fixed-wing, single engine Two2Fly Aviation LLC
League City, Texas
Standard 2024-06-24 ValidFAA registration status code V: Valid registration. All codes
N5570M Aero Commander
100
Fixed-wing, single engine Flythebat.Com LLC
Chicago, Illinois
Standard 2024-06-24 ValidFAA registration status code V: Valid registration. All codes
N5631U Piper
PA-28-140
Fixed-wing, single engine Individual owner
Florida
Standard 2024-06-24 ValidFAA registration status code V: Valid registration. All codes
N6933W Piper
PA-28-140
Fixed-wing, single engine Alpha 1 Aviation LLC
Helena, Alabama
Standard 2024-06-24 ValidFAA registration status code V: Valid registration. All codes
N7212Q Cessna
172L
Fixed-wing, single engine Link Air Service LLC
Minong, Wisconsin
Standard 2024-06-24 ValidFAA registration status code V: Valid registration. All codes
N8318R Piper
PA-28-140
Fixed-wing, single engine Air Wave Holdings LLC
Porter, Texas
Standard 2024-06-24 ValidFAA registration status code V: Valid registration. All codes
N8904D Piper
PA-22-160
Fixed-wing, single engine Individual owner
Oregon
Standard 2024-06-24 ValidFAA registration status code V: Valid registration. All codes
N723GA Grumman American Avn. Corp.
GA-7
Fixed-wing, multi-engine Long Island Aviators LLC
Seaford, New York
Standard 2024-06-23 ValidFAA registration status code V: Valid registration. All codes
N123UC Cessna
172P
Fixed-wing, single engine Individual owner
Virginia
Standard 2024-06-22 ValidFAA registration status code V: Valid registration. All codes
N155BY American
AA-5
Fixed-wing, single engine Individual owner
California
Standard 2024-06-22 ValidFAA registration status code V: Valid registration. All codes
N241CF Piper
PA-23
Fixed-wing, multi-engine Individual owner
Iowa
Standard 2024-06-22 ValidFAA registration status code V: Valid registration. All codes
N26299 Grumman American Avn. Corp.
AA-5A
Fixed-wing, single engine Individual owner
New Jersey
Standard 2024-06-22 ValidFAA registration status code V: Valid registration. All codes
N28FF Piper
PA-28-150
Fixed-wing, single engine Individual owner
Georgia
Standard 2024-06-22 ValidFAA registration status code V: Valid registration. All codes
N4023Z Piper
PA-18-150
Fixed-wing, single engine Individual owner
Alaska
Restricted 2024-06-22 ValidFAA registration status code V: Valid registration. All codes
N4717J Beech
A23-19
Fixed-wing, single engine Brock Aviation Flight School LLC
Douglasville, Georgia
Standard 2024-06-22 ValidFAA registration status code V: Valid registration. All codes
N5089J Cessna
172N
Fixed-wing, single engine Co-owned owner
Colorado
Standard 2024-06-22 ValidFAA registration status code V: Valid registration. All codes
N5988Z Piper
PA-18-150
Fixed-wing, single engine Individual owner
Alaska
Standard 2024-06-22 ValidFAA registration status code V: Valid registration. All codes
N6755B Piper
PA-22-150
Fixed-wing, single engine Twotards Aviation LLC
Moses Lake, Washington
Standard 2024-06-22 ValidFAA registration status code V: Valid registration. All codes
N7908L Beech
A23-19
Fixed-wing, single engine USA Aircraft Leasing LLC
Dover, Delaware
Standard 2024-06-22 ValidFAA registration status code V: Valid registration. All codes
N198ED American Champion Aircraft
7GCAA
Fixed-wing, single engine Kv Helicopters LLC
Lititz, Pennsylvania
Standard 2024-06-21 ValidFAA registration status code V: Valid registration. All codes
N2893X Cessna
177
Fixed-wing, single engine Co-owned owner
Kansas
Standard 2024-06-21 ValidFAA registration status code V: Valid registration. All codes
N32731 Piper
PA-28-151
Fixed-wing, single engine Reels Up LLC
Middletown, Delaware
Standard 2024-06-21 ValidFAA registration status code V: Valid registration. All codes
N35738 Cessna
172I
Fixed-wing, single engine Plane Life LLC
Wilmington, Delaware
Standard 2024-06-21 ValidFAA registration status code V: Valid registration. All codes
N551AP Cessna
172P
Fixed-wing, single engine Cappe Investment Group LLC
Homestead, Florida
Standard 2024-06-21 ValidFAA registration status code V: Valid registration. All codes
N5578U Piper
PA-28-140
Fixed-wing, single engine Individual owner
Florida
Standard 2024-06-21 ValidFAA registration status code V: Valid registration. All codes
N6175T Guest Aaron M
RV-4
Fixed-wing, single engine Individual owner
Texas
Experimental 2024-06-21 ValidFAA registration status code V: Valid registration. All codes
N737FH Cessna
172N
Fixed-wing, single engine Eagle Simulator LLC
Lake Oswego, Oregon
Standard 2024-06-21 ValidFAA registration status code V: Valid registration. All codes
N78330 Cessna
172K
Fixed-wing, single engine Wings Over Texas Holdings LLC
Denton, Texas
Standard 2024-06-21 ValidFAA registration status code V: Valid registration. All codes
N85BR Rich Beryl G
RV4
Fixed-wing, single engine Individual owner
Oregon
Experimental 2024-06-21 ValidFAA registration status code V: Valid registration. All codes
N9077K Piper
PA-28-161
Fixed-wing, single engine Pacific Coast Aero INC
Torrance, California
Standard 2024-06-21 ValidFAA registration status code V: Valid registration. All codes
N95181 Piper
PA-28-140
Fixed-wing, single engine Individual owner
Pennsylvania
Standard 2024-06-21 ValidFAA registration status code V: Valid registration. All codes
N9750Q Cessna
172M
Fixed-wing, single engine Individual owner
Texas
Standard 2024-06-21 ValidFAA registration status code V: Valid registration. All codes
N19803 Cessna
172M
Fixed-wing, single engine American Patrols INC
Midland, Texas
Standard 2024-06-20 ValidFAA registration status code V: Valid registration. All codes
N57458 Bellanca
7GCBC
Fixed-wing, single engine Flytrek3 LLC
Palmer, Alaska
Multiple 2024-06-20 ValidFAA registration status code V: Valid registration. All codes
N7197G Cessna
172K
Fixed-wing, single engine Fly Wissota LLC
Chippewa Falls, Wisconsin
Standard 2024-06-20 ValidFAA registration status code V: Valid registration. All codes
N734BZ Cessna
172N
Fixed-wing, single engine Individual owner
North Carolina
Standard 2024-06-20 ValidFAA registration status code V: Valid registration. All codes
N8126E Cessna
172N
Fixed-wing, single engine Individual owner
Arkansas
Standard 2024-06-20 ValidFAA registration status code V: Valid registration. All codes
N8148J Piper
PA-28-161
Fixed-wing, single engine Air Winner LLC
Warner Robins, Georgia
Standard 2024-06-20 ValidFAA registration status code V: Valid registration. All codes
N92894 Cessna
172M
Fixed-wing, single engine Individual owner
California
Standard 2024-06-20 ValidFAA registration status code V: Valid registration. All codes
N9324D Piper
PA-22-160
Fixed-wing, single engine Withheld at owner's request
Standard 2024-06-20 ValidFAA registration status code V: Valid registration. All codes
N2391T Piper
PA-28-140
Fixed-wing, single engine Lotnicza LLC
Houston, Texas
Standard 2024-06-18 ValidFAA registration status code V: Valid registration. All codes
N2746P Piper
PA-22-150
Fixed-wing, single engine Individual owner
Utah
Standard 2024-06-18 ValidFAA registration status code V: Valid registration. All codes
N40882 Piper
PA-28-151
Fixed-wing, single engine Flight Factory LLC
Danville, California
Standard 2024-06-18 ValidFAA registration status code V: Valid registration. All codes
N4346F Piper
PA-28-151
Fixed-wing, single engine Individual owner
California
Standard 2024-06-18 ValidFAA registration status code V: Valid registration. All codes
N5019W Piper
PA-28-160
Fixed-wing, single engine Individual owner
Oregon
Standard 2024-06-18 ValidFAA registration status code V: Valid registration. All codes
N6560W Piper
PA-28-140
Fixed-wing, single engine Individual owner
Washington
Standard 2024-06-18 ValidFAA registration status code V: Valid registration. All codes
N733CE Cessna
172N
Fixed-wing, single engine N2893E LLC
Reno, Nevada
Standard 2024-06-18 ValidFAA registration status code V: Valid registration. All codes
N7476R Piper
PA-28-140
Fixed-wing, single engine Co-owned owner
Washington
Standard 2024-06-18 ValidFAA registration status code V: Valid registration. All codes
N8890K Piper
PA-28-140
Fixed-wing, single engine Fgds Aviation LLC
North Fort Myers, Florida
Standard 2024-06-18 ValidFAA registration status code V: Valid registration. All codes
N9693D Piper
PA-18A 150
Fixed-wing, single engine Individual owner
Minnesota
Multiple 2024-06-18 ValidFAA registration status code V: Valid registration. All codes
N172JL Cessna
172K
Fixed-wing, single engine Sutton Aircraft Salvage LLC
Palmer, Alaska
Standard 2024-06-17 ValidFAA registration status code V: Valid registration. All codes
N6182D Piper
PA-18
Fixed-wing, single engine Gr8Daynevada LLC
Carson City, Nevada
Restricted 2024-06-17 ValidFAA registration status code V: Valid registration. All codes
N63174 Cessna
172P
Fixed-wing, single engine Individual owner
Washington
Standard 2024-06-17 ValidFAA registration status code V: Valid registration. All codes
N68DG American Champion Aircraft
7GCBC
Fixed-wing, single engine Individual owner
Alaska
Standard 2024-06-17 ValidFAA registration status code V: Valid registration. All codes
N73785 Cessna
172N
Fixed-wing, single engine Sierra Sky Aviation LLC
Whitefish, Montana
Standard 2024-06-17 ValidFAA registration status code V: Valid registration. All codes
N738LH Cessna
172N
Fixed-wing, single engine Lh Enterprise LLC
Eads, Tennessee
Standard 2024-06-17 ValidFAA registration status code V: Valid registration. All codes
N739DW Cessna
172N
Fixed-wing, single engine Kayo Air Service INC
Harlingen, Texas
Standard 2024-06-17 ValidFAA registration status code V: Valid registration. All codes
N7562G Cessna
172L
Fixed-wing, single engine Wings Over Texas Holdings LLC
Denton, Texas
Standard 2024-06-17 ValidFAA registration status code V: Valid registration. All codes
N9071L Champion
7GCBC
Fixed-wing, single engine Individual owner
Idaho
Standard 2024-06-17 ValidFAA registration status code V: Valid registration. All codes
N9166L Bellanca
7GCBC
Fixed-wing, single engine Sutton Aircraft Salvage LLC
Palmer, Alaska
Standard 2024-06-17 ValidFAA registration status code V: Valid registration. All codes
N936AZ Cessna
172N
Fixed-wing, single engine N936Az LLC
Miami, Florida
Standard 2024-06-17 ValidFAA registration status code V: Valid registration. All codes
N938AZ Cessna
172N
Fixed-wing, single engine N938Az LLC
Miami, Florida
Standard 2024-06-17 ValidFAA registration status code V: Valid registration. All codes
N9821U Grumman American Avn. Corp.
AA-5A
Fixed-wing, single engine Coquimbo Capital Holdings LLC
Sandy, Utah
Standard 2024-06-17 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.