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
N5579U Piper
PA-28-140
Fixed-wing, single engine International Air Services INC Trustee
Carson City, Nevada
Standard 2023-07-29 ValidFAA registration status code V: Valid registration. All codes
N6129L American
AA-1
Fixed-wing, single engine Co-owned owner
Indiana
Standard 2023-07-29 ValidFAA registration status code V: Valid registration. All codes
N6369W Piper
PA-28-140
Fixed-wing, single engine Co-owned owner
North Carolina
Standard 2023-07-29 ValidFAA registration status code V: Valid registration. All codes
N47969 Piper
PA-28-161
Fixed-wing, single engine Co-owned owner
Texas
Standard 2023-07-28 ValidFAA registration status code V: Valid registration. All codes
N734GR Cessna
172N
Fixed-wing, single engine N734Gr LLC
Grand Prairie, Texas
Restricted 2023-07-28 ValidFAA registration status code V: Valid registration. All codes
N77160 Piper
PA-28-140
Fixed-wing, single engine Individual owner
Michigan
Standard 2023-07-28 ValidFAA registration status code V: Valid registration. All codes
N83039 Piper
PA-28-161
Fixed-wing, single engine Macair Aviation LLC
Xenia, Ohio
Standard 2023-07-28 ValidFAA registration status code V: Valid registration. All codes
N9649W Piper
PA-28-140
Fixed-wing, single engine Individual owner
Arizona
Standard 2023-07-28 ValidFAA registration status code V: Valid registration. All codes
N98240 Piper
PA-28-140
Fixed-wing, single engine Individual owner
Iowa
Standard 2023-07-28 ValidFAA registration status code V: Valid registration. All codes
N118PC Cessna
172N
Fixed-wing, single engine Individual owner
Florida
Standard 2023-07-27 ValidFAA registration status code V: Valid registration. All codes
N2571H Piper
PA-18-150
Fixed-wing, single engine Individual owner
Alaska
Standard 2023-07-27 ValidFAA registration status code V: Valid registration. All codes
N3551Z Piper
PA-22-160
Fixed-wing, single engine Alpine Cable & Construction INC
Grand Junction, Colorado
Experimental 2023-07-27 ValidFAA registration status code V: Valid registration. All codes
N3597P Piper
PA-18-150
Fixed-wing, single engine Individual owner
Alaska
Restricted 2023-07-27 ValidFAA registration status code V: Valid registration. All codes
N64SS Cessna
172M
Fixed-wing, single engine Co-owned owner
Nevada
Standard 2023-07-27 ValidFAA registration status code V: Valid registration. All codes
N704 Piper
PA-18-150
Fixed-wing, single engine Individual owner
Georgia
Multiple 2023-07-27 ValidFAA registration status code V: Valid registration. All codes
N7042G Cessna
172K
Fixed-wing, single engine 7042G LLC
Shingle Springs, California
Standard 2023-07-27 ValidFAA registration status code V: Valid registration. All codes
N7088G Cessna
172K
Fixed-wing, single engine Sardeis LLC
River Hills, Wisconsin
Standard 2023-07-27 ValidFAA registration status code V: Valid registration. All codes
N775KT Piper
PA-18-150
Fixed-wing, single engine Co-owned owner
Alaska
Restricted 2023-07-27 ValidFAA registration status code V: Valid registration. All codes
N9871W Piper
PA-28-140
Fixed-wing, single engine Individual owner
Missouri
Standard 2023-07-27 ValidFAA registration status code V: Valid registration. All codes
N104JD Piper
PA-18-150
Fixed-wing, single engine Jnk Equipment LLC
Deer Harbor, Washington
Standard 2023-07-26 ValidFAA registration status code V: Valid registration. All codes
N1118Q Piper
PA-28-161
Fixed-wing, single engine Ascend Aviation LLC
Bountiful, Utah
Standard 2023-07-26 ValidFAA registration status code V: Valid registration. All codes
N1315E Cessna
172N
Fixed-wing, single engine Tada Aero LLC
Worthington, Ohio
Standard 2023-07-26 ValidFAA registration status code V: Valid registration. All codes
N1372T Kenden-Peterson-Folstad
ACRO SPORT II
Fixed-wing, single engine Individual owner
North Carolina
Experimental 2023-07-26 ValidFAA registration status code V: Valid registration. All codes
N22752 Cessna
172M
Fixed-wing, single engine Flying Tigers Flight School LTD
Houston, Texas
Standard 2023-07-26 ValidFAA registration status code V: Valid registration. All codes
N29NE Robinson Helicopter
R22 MARINER
Helicopter Yankee Helicopters LLC
Plainville, Connecticut
Standard 2023-07-26 ValidFAA registration status code V: Valid registration. All codes
N4262J Piper
PA-28-140
Fixed-wing, single engine Beaverdam Aeronautics LLC
Chatom, Alabama
Standard 2023-07-26 ValidFAA registration status code V: Valid registration. All codes
N5051E Bellanca
7GCBC
Fixed-wing, single engine Individual owner
Maine
Standard 2023-07-26 ValidFAA registration status code V: Valid registration. All codes
N5225D Cessna
172N
Fixed-wing, single engine Mustang Sally Aviation LLC
Camden, South Carolina
Standard 2023-07-26 ValidFAA registration status code V: Valid registration. All codes
N5302W Piper
PA-28
Fixed-wing, single engine Individual owner
Alaska
Standard 2023-07-26 ValidFAA registration status code V: Valid registration. All codes
N5378D Cessna
172N
Fixed-wing, single engine Mustang Sally Aviation LLC
Camden, South Carolina
Standard 2023-07-26 ValidFAA registration status code V: Valid registration. All codes
N626DD Goff George V
RV-6A
Fixed-wing, single engine Individual owner
Texas
Experimental 2023-07-26 ValidFAA registration status code V: Valid registration. All codes
N733HS Cessna
172N
Fixed-wing, single engine Co-owned owner
Oregon
Standard 2023-07-26 ValidFAA registration status code V: Valid registration. All codes
N78385 Cessna
172K
Fixed-wing, single engine Amf Aviation LLC
Dallas, Georgia
Standard 2023-07-26 ValidFAA registration status code V: Valid registration. All codes
N8101A Piper
PA-18
Fixed-wing, single engine Individual owner
Mississippi
Standard 2023-07-26 ValidFAA registration status code V: Valid registration. All codes
N8233T Piper
PA-28-151
Fixed-wing, single engine East Bay Aviators N8233T
Kalispell, Montana
Standard 2023-07-26 ValidFAA registration status code V: Valid registration. All codes
N8422L Cessna
172I
Fixed-wing, single engine Co-owned owner
Alaska
Standard 2023-07-26 ValidFAA registration status code V: Valid registration. All codes
N3874P Piper
PA-22-150
Fixed-wing, single engine Co-owned owner
Missouri
Standard 2023-07-25 ValidFAA registration status code V: Valid registration. All codes
N6761W Piper
PA-28-140
Fixed-wing, single engine Individual owner
Kentucky
Standard 2023-07-25 ValidFAA registration status code V: Valid registration. All codes
N1092T Piper
PA-28-140
Fixed-wing, single engine H4S Aviation LLC
Longview, Texas
Standard 2023-07-24 ValidFAA registration status code V: Valid registration. All codes
N172KG Cessna
172N
Fixed-wing, single engine Co-owned owner
Kentucky
Standard 2023-07-24 ValidFAA registration status code V: Valid registration. All codes
N2356M Robinson Helicopter
R22 BETA
Helicopter N112Vg LLC
Princeton, New Jersey
Standard 2023-07-24 ValidFAA registration status code V: Valid registration. All codes
N32296 Piper
PA-28-140
Fixed-wing, single engine Fly South Aviation LLC
Charlotte, North Carolina
Standard 2023-07-24 ValidFAA registration status code V: Valid registration. All codes
N3869Q Cessna
172L
Fixed-wing, single engine New Garden Township
Landenberg, Pennsylvania
Restricted 2023-07-24 ValidFAA registration status code V: Valid registration. All codes
N426HL Cessna
172N
Fixed-wing, single engine Individual owner
Florida
Standard 2023-07-24 ValidFAA registration status code V: Valid registration. All codes
N4605R Piper
PA-28-140
Fixed-wing, single engine Five Eagles Group LLC
Pompano Beach, Florida
Standard 2023-07-24 ValidFAA registration status code V: Valid registration. All codes
N7209F Piper
PA-28-140
Fixed-wing, single engine New Garden Township
Landenberg, Pennsylvania
Standard 2023-07-24 ValidFAA registration status code V: Valid registration. All codes
N7556G Cessna
172L
Fixed-wing, single engine Co-owned owner
Alaska
Standard 2023-07-24 ValidFAA registration status code V: Valid registration. All codes
N12546 Cessna
172M
Fixed-wing, single engine Individual owner
Arizona
Standard 2023-07-23 ValidFAA registration status code V: Valid registration. All codes
N3138T Cessna
177
Fixed-wing, single engine Individual owner
Kentucky
Standard 2023-07-22 ValidFAA registration status code V: Valid registration. All codes
N31770 Johnson Wally
RV-4
Fixed-wing, single engine Individual owner
Texas
Experimental 2023-07-22 ValidFAA registration status code V: Valid registration. All codes
N5738W Piper
PA-28-150
Fixed-wing, single engine Cherokee 38Whiskey LLC
Charlotte, North Carolina
Standard 2023-07-22 ValidFAA registration status code V: Valid registration. All codes
N6046C Callair
A-4
Fixed-wing, single engine Individual owner
Texas
Restricted 2023-07-22 ValidFAA registration status code V: Valid registration. All codes
N6512K Cessna
172P
Fixed-wing, single engine Loomis Aviation LLC
Columbus, Ohio
Standard 2023-07-22 ValidFAA registration status code V: Valid registration. All codes
N3140T Cessna
177
Fixed-wing, single engine Individual owner
Florida
Standard 2023-07-21 ValidFAA registration status code V: Valid registration. All codes
N320LE Feugen Hugo M
LANCAIR 320
Fixed-wing, single engine Individual owner
Montana
Experimental 2023-07-21 ValidFAA registration status code V: Valid registration. All codes
N902FA Cessna
172N
Fixed-wing, single engine Vero Technical Support INC
Pensacola, Florida
Standard 2023-07-21 ValidFAA registration status code V: Valid registration. All codes
N1096T Piper
PA-28-140
Fixed-wing, single engine Individual owner
Texas
Standard 2023-07-20 ValidFAA registration status code V: Valid registration. All codes
N2856X Cessna
177
Fixed-wing, single engine Individual owner
California
Standard 2023-07-20 ValidFAA registration status code V: Valid registration. All codes
N3939X Piper
PA-28-151
Fixed-wing, single engine Arapahoe Flight Club LLC
Colorado Springs, Colorado
Standard 2023-07-20 ValidFAA registration status code V: Valid registration. All codes
N4282T Piper
PA-28-140
Fixed-wing, single engine Individual owner
Texas
Standard 2023-07-20 ValidFAA registration status code V: Valid registration. All codes
N4586R Piper
PA-28-140
Fixed-wing, single engine Individual owner
Nevada
Standard 2023-07-20 ValidFAA registration status code V: Valid registration. All codes
N5804V Piper
PA-28-161
Fixed-wing, single engine Nationwide Aviation LLC
Hudson Oaks, Texas
Standard 2023-07-20 ValidFAA registration status code V: Valid registration. All codes
N6545H Cessna
172M
Fixed-wing, single engine American Patrols INC
Midland, Texas
Standard 2023-07-20 ValidFAA registration status code V: Valid registration. All codes
N6873W Piper
PA-28-140
Fixed-wing, single engine Co-owned owner
California
Standard 2023-07-20 ValidFAA registration status code V: Valid registration. All codes
N75605 Cessna
172N
Fixed-wing, single engine Individual owner
California
Multiple 2023-07-20 ValidFAA registration status code V: Valid registration. All codes
N7780G Cessna
172L
Fixed-wing, single engine Aero Quest LLC DBA
Olive Branch, Mississippi
Standard 2023-07-20 ValidFAA registration status code V: Valid registration. All codes
N99JY Yeager Joe H
RV-6A
Fixed-wing, single engine Individual owner
North Carolina
Experimental 2023-07-20 ValidFAA registration status code V: Valid registration. All codes
N12867 Cessna
172M
Fixed-wing, single engine Palm Grove Development INC
Gray, Georgia
Standard 2023-07-19 ValidFAA registration status code V: Valid registration. All codes
N13943 Cessna
172M
Fixed-wing, single engine Individual owner
Washington
Standard 2023-07-19 ValidFAA registration status code V: Valid registration. All codes
N172MF Cessna
172K
Fixed-wing, single engine Rhody Skyhawk Flying Club LLC
Middletown, Delaware
Standard 2023-07-19 ValidFAA registration status code V: Valid registration. All codes
N2973U Piper
PA-28-161
Fixed-wing, single engine Mobug LLC
Montgomery, Texas
Standard 2023-07-19 ValidFAA registration status code V: Valid registration. All codes
N3427T Cessna
177
Fixed-wing, single engine Co-owned owner
Utah
Standard 2023-07-19 ValidFAA registration status code V: Valid registration. All codes
N41554 Piper
PA-28-140
Fixed-wing, single engine Flyboys Flight Centers LLC
Griffin, Georgia
Standard 2023-07-19 ValidFAA registration status code V: Valid registration. All codes
N4397X Piper
PA-28-151
Fixed-wing, single engine C & D Media LLC
Lees Summit, Missouri
Standard 2023-07-19 ValidFAA registration status code V: Valid registration. All codes
N461PM Piper
PA-12
Fixed-wing, single engine Individual owner
Minnesota
Standard 2023-07-19 ValidFAA registration status code V: Valid registration. All codes
N53744 Bellanca
7GCAA
Fixed-wing, single engine Tango Echo Aero LLC
Holly Lake Ranch, Texas
Standard 2023-07-19 ValidFAA registration status code V: Valid registration. All codes
N5654W Piper
PA-28-160
Fixed-wing, single engine Co-owned owner
Tennessee
Standard 2023-07-19 ValidFAA registration status code V: Valid registration. All codes
N56900 Piper
PA-28-151
Fixed-wing, single engine Individual owner
Washington
Standard 2023-07-19 ValidFAA registration status code V: Valid registration. All codes
N5828D Piper
PA-22-150
Fixed-wing, single engine Individual owner
Michigan
Standard 2023-07-19 ValidFAA registration status code V: Valid registration. All codes
N5960Z Piper
PA-18-150
Fixed-wing, single engine Individual owner
Alaska
Standard 2023-07-19 ValidFAA registration status code V: Valid registration. All codes
N64527 Cessna
172M
Fixed-wing, single engine Aspire Aviation LLC
Farmingdale, New York
Standard 2023-07-19 ValidFAA registration status code V: Valid registration. All codes
N6981W Piper
PA-28-140
Fixed-wing, single engine Co-owned owner
Tennessee
Standard 2023-07-19 ValidFAA registration status code V: Valid registration. All codes
N725DB Grumman American Avn. Corp.
AA-5A
Fixed-wing, single engine Individual owner
Iowa
Standard 2023-07-19 ValidFAA registration status code V: Valid registration. All codes
N7550G Cessna
172L
Fixed-wing, single engine 7550G LLC
Birmingham, Michigan
Standard 2023-07-19 ValidFAA registration status code V: Valid registration. All codes
N8184G Cessna
172N
Fixed-wing, single engine Aspire Aviation LLC
Farmingdale, New York
Multiple 2023-07-19 ValidFAA registration status code V: Valid registration. All codes
N9917Q Cessna
172M
Fixed-wing, single engine Still Flying LLC
Gibsland, Louisiana
Standard 2023-07-19 ValidFAA registration status code V: Valid registration. All codes
N12635 Cessna
172M
Fixed-wing, single engine Individual owner
Pennsylvania
Standard 2023-07-18 ValidFAA registration status code V: Valid registration. All codes
N21648 Cessna
172M
Fixed-wing, single engine Fox Victor Aviation LLC
Newnan, Georgia
Standard 2023-07-18 ValidFAA registration status code V: Valid registration. All codes
N333FA Piper
PA-28-140
Fixed-wing, single engine Hobart Aviation INC
Akron, Ohio
Standard 2023-07-18 ValidFAA registration status code V: Valid registration. All codes
N3CL Cessna
172K
Fixed-wing, single engine Individual owner
Wisconsin
Standard 2023-07-18 ValidFAA registration status code V: Valid registration. All codes
N4450J Piper
PA-28-140
Fixed-wing, single engine Individual owner
Kansas
Standard 2023-07-18 ValidFAA registration status code V: Valid registration. All codes
N5108W Piper
PA-28
Fixed-wing, single engine Individual owner
Florida
Standard 2023-07-18 ValidFAA registration status code V: Valid registration. All codes
N5667W Piper
PA-28-160
Fixed-wing, single engine Individual owner
Georgia
Standard 2023-07-18 ValidFAA registration status code V: Valid registration. All codes
N612FT Piper
PA-28-161
Fixed-wing, single engine Florida Institute of Technology
Melbourne, Florida
Standard 2023-07-18 ValidFAA registration status code V: Valid registration. All codes
N704CZ Cessna
150M
Fixed-wing, single engine Individual owner
Arizona
Standard 2023-07-18 ValidFAA registration status code V: Valid registration. All codes
N9226D Piper
PA-22-160
Fixed-wing, single engine Clf Industries LLC
Thornton, Colorado
Standard 2023-07-18 ValidFAA registration status code V: Valid registration. All codes
N936RV Pippen-York
RV6
Fixed-wing, single engine Individual owner
Texas
Experimental 2023-07-17 ValidFAA registration status code V: Valid registration. All codes
N371DS Piper
PA-23
Fixed-wing, multi-engine Cl Finney Aviation LLC
Benton, Kansas
Standard 2023-07-14 ValidFAA registration status code V: Valid registration. All codes
N5127G Piper
PA-28-140
Fixed-wing, single engine Individual owner
Georgia
Standard 2023-07-14 ValidFAA registration status code V: Valid registration. All codes
N5518U Piper
PA-28-140
Fixed-wing, single engine C1 Aviation LLC
New Orleans, Louisiana
Standard 2023-07-14 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.