The U.S. aircraft register, updated daily
Engines · piston (reciprocating) · data as of October 9, 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
N8249N Piper
PA-28-140
Fixed-wing, single engine Aero Club Aviation LLC
Apollo Beach, Florida
Standard 2021-04-17 ValidFAA registration status code V: Valid registration. All codes
N942FL Lamb Frank Adelbert
LAMB RV-9A
Fixed-wing, single engine Individual owner
Oregon
Experimental 2021-04-17 ValidFAA registration status code V: Valid registration. All codes
N9549H Cessna
172M
Fixed-wing, single engine Co-owned owner
Texas
Standard 2021-04-17 ValidFAA registration status code V: Valid registration. All codes
N12600 Cessna
172M
Fixed-wing, single engine Kelley Aircraft LLC
Weyers Cave, Virginia
Standard 2021-04-16 ValidFAA registration status code V: Valid registration. All codes
N12LG Gosselin Leonard Joseph
RV-6
Fixed-wing, single engine Lapiair LLC
Vergennes, Vermont
Experimental 2021-04-16 ValidFAA registration status code V: Valid registration. All codes
N5297W Piper
PA-28
Fixed-wing, single engine Individual owner
Texas
Standard 2021-04-16 ValidFAA registration status code V: Valid registration. All codes
N64192 Cessna
172M
Fixed-wing, single engine Skyhawk Transport LLC
Hazel Green, Alabama
Standard 2021-04-16 ValidFAA registration status code V: Valid registration. All codes
N7634C Piper
PA-28-140
Fixed-wing, single engine Individual owner
Texas
Standard 2021-04-16 ValidFAA registration status code V: Valid registration. All codes
N78302 Cessna
172K
Fixed-wing, single engine Co-owned owner
Minnesota
Standard 2021-04-16 ValidFAA registration status code V: Valid registration. All codes
N78490 Cessna
172K
Fixed-wing, single engine Individual owner
Georgia
Standard 2021-04-16 ValidFAA registration status code V: Valid registration. All codes
N82325 Piper
PA-18-150
Fixed-wing, single engine Individual owner
Alaska
Standard 2021-04-16 ValidFAA registration status code V: Valid registration. All codes
N9118L Champion
7GCBC
Fixed-wing, single engine Individual owner
Maine
Standard 2021-04-16 ValidFAA registration status code V: Valid registration. All codes
N2635Q Piper
PA-28-161
Fixed-wing, single engine Air-Mods Flight Academy
Robbinsville, New Jersey
Standard 2021-04-15 ValidFAA registration status code V: Valid registration. All codes
N3492T Cessna
177
Fixed-wing, single engine Individual owner
Arizona
Standard 2021-04-15 ValidFAA registration status code V: Valid registration. All codes
N3989K Piper
PA-28-140
Fixed-wing, single engine Individual owner
Texas
Standard 2021-04-15 ValidFAA registration status code V: Valid registration. All codes
N5117Q Cessna
172M
Fixed-wing, single engine Individual owner
Texas
Standard 2021-04-15 ValidFAA registration status code V: Valid registration. All codes
N5457S Piper
PA-28-140
Fixed-wing, single engine Individual owner
Virginia
Standard 2021-04-15 ValidFAA registration status code V: Valid registration. All codes
N8039D Piper
PA-22-150
Fixed-wing, single engine Individual owner
Oklahoma
Standard 2021-04-15 ValidFAA registration status code V: Valid registration. All codes
N9060H Cessna
172M
Fixed-wing, single engine J&S Flying Enterprises LLC
Zanesville, Ohio
Standard 2021-04-15 ValidFAA registration status code V: Valid registration. All codes
N18DT American Champion Aircraft
7GCAA
Fixed-wing, single engine Kit Air LLC
Waconia, Minnesota
Standard 2021-04-14 ValidFAA registration status code V: Valid registration. All codes
N33674 Piper
PA-28-140
Fixed-wing, single engine Individual owner
Maine
Standard 2021-04-14 ValidFAA registration status code V: Valid registration. All codes
N4323R Cessna
172M
Fixed-wing, single engine My Flight LLC
Cypress, Texas
Standard 2021-04-14 ValidFAA registration status code V: Valid registration. All codes
N4434Z Piper
PA-18-150
Fixed-wing, single engine Wings Over Water INC
Minneapolis, Minnesota
Standard 2021-04-14 ValidFAA registration status code V: Valid registration. All codes
N4990P Piper
PA-18-150
Fixed-wing, single engine Crux Logistics & Consulting LTD
Las Vegas, Nevada
Multiple 2021-04-14 ValidFAA registration status code V: Valid registration. All codes
N6929D Piper
PA-22-150
Fixed-wing, single engine Individual owner
North Carolina
Standard 2021-04-14 ValidFAA registration status code V: Valid registration. All codes
N8076C Piper
PA-18-135
Fixed-wing, single engine Individual owner
Alaska
Standard 2021-04-14 ValidFAA registration status code V: Valid registration. All codes
N818TA Piper
PA-18-150
Fixed-wing, single engine Foothill Aviation LLC
Iliamna, Alaska
Standard 2021-04-14 ValidFAA registration status code V: Valid registration. All codes
N211BA Cessna
172N
Fixed-wing, single engine Individual owner
Kansas
Standard 2021-04-13 ValidFAA registration status code V: Valid registration. All codes
N4178J Piper
PA-28-140
Fixed-wing, single engine Individual owner
Michigan
Standard 2021-04-13 ValidFAA registration status code V: Valid registration. All codes
N41790 Piper
PA-28-151
Fixed-wing, single engine Individual owner
New Jersey
Standard 2021-04-13 ValidFAA registration status code V: Valid registration. All codes
N43141 Piper
PA-28-161
Fixed-wing, single engine Individual owner
California
Standard 2021-04-13 ValidFAA registration status code V: Valid registration. All codes
N43559 Piper
PA-28-140
Fixed-wing, single engine Individual owner
Minnesota
Standard 2021-04-13 ValidFAA registration status code V: Valid registration. All codes
N5554E Piper
PA-28-140
Fixed-wing, single engine Valiair Limited Company Trustee
Casper, Wyoming
Standard 2021-04-13 ValidFAA registration status code V: Valid registration. All codes
N55930 Piper
PA-28-140
Fixed-wing, single engine Co-owned owner
Kansas
Standard 2021-04-13 ValidFAA registration status code V: Valid registration. All codes
N625FL Piper
PA-28-140
Fixed-wing, single engine Fly Foxtrot Lima LLC
Philadelphia, Pennsylvania
Standard 2021-04-13 ValidFAA registration status code V: Valid registration. All codes
N7170R Piper
PA-28-140
Fixed-wing, single engine Individual owner
Georgia
Standard 2021-04-13 ValidFAA registration status code V: Valid registration. All codes
N733SK Cessna
172N
Fixed-wing, single engine Rcs Services LLC
California, Maryland
Standard 2021-04-13 ValidFAA registration status code V: Valid registration. All codes
N7659F Piper
PA-28-151
Fixed-wing, single engine Charles City Aeronautics INC DBA
Charles City, Iowa
Standard 2021-04-13 ValidFAA registration status code V: Valid registration. All codes
N8958D Piper
PA-22-160
Fixed-wing, single engine Individual owner
South Carolina
Standard 2021-04-13 ValidFAA registration status code V: Valid registration. All codes
N3507F Cessna
177
Fixed-wing, single engine Aerial Oklahoma LLC
Oklahoma City, Oklahoma
Standard 2021-04-12 ValidFAA registration status code V: Valid registration. All codes
N4836G Cessna
172N
Fixed-wing, single engine Evolo Aviation LLC
Worthington, Ohio
Standard 2021-04-12 ValidFAA registration status code V: Valid registration. All codes
N6755W Piper
PA-28-140
Fixed-wing, single engine Aeroqualite Maintenance
Cumberland, Wisconsin
Standard 2021-04-12 ValidFAA registration status code V: Valid registration. All codes
N7037G Cessna
172K
Fixed-wing, single engine N7037G INC
Newark, Delaware
Standard 2021-04-12 ValidFAA registration status code V: Valid registration. All codes
N70380 Cessna
172M
Fixed-wing, single engine Mindy LTD LLC
Muscatine, Iowa
Standard 2021-04-12 ValidFAA registration status code V: Valid registration. All codes
N120MF Omf
OMF-100-160
Fixed-wing, single engine Individual owner
Oregon
Standard 2021-04-10 ValidFAA registration status code V: Valid registration. All codes
N35CK Blackmore Richard H
RV-6
Fixed-wing, single engine Individual owner
Arizona
Experimental 2021-04-10 ValidFAA registration status code V: Valid registration. All codes
N521LD Cessna
172N
Fixed-wing, single engine Star Marianas Air INC
Tinian, Northern Mariana Islands
Standard 2021-04-10 ValidFAA registration status code V: Valid registration. All codes
N5239K Cessna
172P
Fixed-wing, single engine Smoketown Flight Center LLC
Smoketown, Pennsylvania
Standard 2021-04-10 ValidFAA registration status code V: Valid registration. All codes
N61901 Cessna
172M
Fixed-wing, single engine Individual owner
Florida
Standard 2021-04-10 ValidFAA registration status code V: Valid registration. All codes
N64140 Cessna
172M
Fixed-wing, single engine C64140 LLC
Bloomington, Indiana
Multiple 2021-04-10 ValidFAA registration status code V: Valid registration. All codes
N713WK Piper
PA-18-150
Fixed-wing, single engine Legends Air Center LLC
Bentonville, Arkansas
Multiple 2021-04-10 ValidFAA registration status code V: Valid registration. All codes
N7318G Cessna
172K
Fixed-wing, single engine Co-owned owner
Montana
Standard 2021-04-10 ValidFAA registration status code V: Valid registration. All codes
N75733 Cessna
172N
Fixed-wing, single engine Red Door Aviation LLC
Dover, Delaware
Standard 2021-04-10 ValidFAA registration status code V: Valid registration. All codes
N78MJ Piper
PA-28-140
Fixed-wing, single engine Individual owner
North Carolina
Standard 2021-04-10 ValidFAA registration status code V: Valid registration. All codes
N8632D Piper
PA-22-160
Fixed-wing, single engine Individual owner
Washington
Standard 2021-04-10 ValidFAA registration status code V: Valid registration. All codes
N3241P Piper
PA-23-160
Fixed-wing, multi-engine Bravo Partners LLC
Payson, Arizona
Standard 2021-04-09 ValidFAA registration status code V: Valid registration. All codes
N5823W Piper
PA-28-150
Fixed-wing, single engine Individual owner
Texas
Standard 2021-04-09 ValidFAA registration status code V: Valid registration. All codes
N6801W Piper
PA-28-140
Fixed-wing, single engine Individual owner
South Carolina
Standard 2021-04-09 ValidFAA registration status code V: Valid registration. All codes
N71128 Piper
PA-28-140
Fixed-wing, single engine Eastern Stearman INC Trustee
Leesburg, Virginia
Standard 2021-04-09 ValidFAA registration status code V: Valid registration. All codes
N26768 Gulfstream American Corp
AA-5A
Fixed-wing, single engine Cheetah268 LLC
Kailua Kona, Hawaii
Standard 2021-04-08 ValidFAA registration status code V: Valid registration. All codes
N73170 Cessna
172M
Fixed-wing, single engine Jahawk Leasing LLC
Sugar Grove, Illinois
Standard 2021-04-08 ValidFAA registration status code V: Valid registration. All codes
N75608 Cessna
172N
Fixed-wing, single engine Individual owner
South Carolina
Standard 2021-04-08 ValidFAA registration status code V: Valid registration. All codes
N9171H Cessna
172M
Fixed-wing, single engine Individual owner
Texas
Standard 2021-04-08 ValidFAA registration status code V: Valid registration. All codes
N2894P Piper
PA-18A 150
Fixed-wing, single engine Individual owner
Oregon
Standard 2021-04-07 ValidFAA registration status code V: Valid registration. All codes
N49MB O'Brien Michael
PITTS SPECIAL S-1C
Fixed-wing, single engine Individual owner
Washington
Experimental 2021-04-07 ValidFAA registration status code V: Valid registration. All codes
N6364D Cessna
172N
Fixed-wing, single engine Suburban Aircraft Leasing and Sales LLC
Sylvania, Ohio
Standard 2021-04-07 ValidFAA registration status code V: Valid registration. All codes
N73784 Cessna
172N
Fixed-wing, single engine Dsr Cherokee 180 LLC
Dallas, Texas
Standard 2021-04-07 ValidFAA registration status code V: Valid registration. All codes
N1437T Piper
PA-28-140
Fixed-wing, single engine Individual owner
Texas
Standard 2021-04-06 ValidFAA registration status code V: Valid registration. All codes
N2087E Cessna
172N
Fixed-wing, single engine Pcs Aviation LLC
La Canada, California
Standard 2021-04-06 ValidFAA registration status code V: Valid registration. All codes
N33030 Piper
PA-28-140
Fixed-wing, single engine Individual owner
Idaho
Standard 2021-04-06 ValidFAA registration status code V: Valid registration. All codes
N424RW Westphal Reuben G
LONGEZE
Fixed-wing, single engine Individual owner
Wisconsin
Experimental 2021-04-06 ValidFAA registration status code V: Valid registration. All codes
N4329Z Piper
PA-18-150
Fixed-wing, single engine Co-owned owner
Alaska
Standard 2021-04-06 ValidFAA registration status code V: Valid registration. All codes
N4334J Piper
PA-28-140
Fixed-wing, single engine Best Equipment Leasing LLC
Bakersfield, California
Standard 2021-04-06 ValidFAA registration status code V: Valid registration. All codes
N46293 Cessna
172K
Fixed-wing, single engine Individual owner
California
Standard 2021-04-06 ValidFAA registration status code V: Valid registration. All codes
N4845J Cessna
172N
Fixed-wing, single engine L&J Aviation INC
Atwater, California
Standard 2021-04-06 ValidFAA registration status code V: Valid registration. All codes
N57320 Piper
PA-28-140
Fixed-wing, single engine Resley Village Aero LLC
Carlton, Texas
Standard 2021-04-06 ValidFAA registration status code V: Valid registration. All codes
N734CP Cessna
172N
Fixed-wing, single engine 5280 Flying Club LLC
Castle Pines, Colorado
Standard 2021-04-06 ValidFAA registration status code V: Valid registration. All codes
N7665S Bellanca
7GCAA
Fixed-wing, single engine Individual owner
Washington
Standard 2021-04-06 ValidFAA registration status code V: Valid registration. All codes
N8128X Piper
PA-28-161
Fixed-wing, single engine Individual owner
Texas
Standard 2021-04-06 ValidFAA registration status code V: Valid registration. All codes
N9891G Cessna
172L
Fixed-wing, single engine Individual owner
Oklahoma
Standard 2021-04-06 ValidFAA registration status code V: Valid registration. All codes
N1425X Piper
PA-28-151
Fixed-wing, single engine Individual owner
California
Standard 2021-04-05 ValidFAA registration status code V: Valid registration. All codes
N2640M Piper
PA-12
Fixed-wing, single engine Individual owner
Alaska
Standard 2021-04-05 ValidFAA registration status code V: Valid registration. All codes
N6743F Piper
PA-28-151
Fixed-wing, single engine Hollywood Biplane LLC DBA
Atlanta, Georgia
Standard 2021-04-05 ValidFAA registration status code V: Valid registration. All codes
N7179D Piper
PA-18A 150
Fixed-wing, single engine Individual owner
Texas
Restricted 2021-04-05 ValidFAA registration status code V: Valid registration. All codes
N75976 Cessna
172N
Fixed-wing, single engine Suburban Aircraft Leasing and Sales LLC
Sylvania, Ohio
Standard 2021-04-05 ValidFAA registration status code V: Valid registration. All codes
N78526 Cessna
172K
Fixed-wing, single engine Individual owner
Delaware
Standard 2021-04-05 ValidFAA registration status code V: Valid registration. All codes
N8166B Piper
PA-28-161
Fixed-wing, single engine Bouchard Dustin
Springfield, Missouri
Standard 2021-04-05 ValidFAA registration status code V: Valid registration. All codes
N9357D Piper
PA-18A 150
Fixed-wing, single engine Individual owner
Montana
Standard 2021-04-05 ValidFAA registration status code V: Valid registration. All codes
N956MD Piper
PA-18A
Fixed-wing, single engine Digit Aviation LLC
Hampton, New Hampshire
Multiple 2021-04-05 ValidFAA registration status code V: Valid registration. All codes
N9701D Piper
PA-22-160
Fixed-wing, single engine Individual owner
Alaska
Standard 2021-04-05 ValidFAA registration status code V: Valid registration. All codes
N172NF Cessna
172P
Fixed-wing, single engine Co-owned owner
New Mexico
Standard 2021-04-02 ValidFAA registration status code V: Valid registration. All codes
N1759V Cessna
172M
Fixed-wing, single engine Individual owner
Michigan
Standard 2021-04-02 ValidFAA registration status code V: Valid registration. All codes
N2833F Piper
PA-28-161
Fixed-wing, single engine Individual owner
Michigan
Standard 2021-04-02 ValidFAA registration status code V: Valid registration. All codes
N3133Q Piper
PA-28-161
Fixed-wing, single engine Learn 2 Fly Ct LLC
Simsbury, Connecticut
Standard 2021-04-02 ValidFAA registration status code V: Valid registration. All codes
N46287 Cessna
172I
Fixed-wing, single engine N46287 LLC
Chehalis, Washington
Standard 2021-04-02 ValidFAA registration status code V: Valid registration. All codes
N56288 Piper
PA-28-140
Fixed-wing, single engine Individual owner
Washington
Standard 2021-04-02 ValidFAA registration status code V: Valid registration. All codes
N65057 Cessna
172P
Fixed-wing, single engine Good Winds LLC
Waterville, Maine
Standard 2021-04-02 ValidFAA registration status code V: Valid registration. All codes
N1417T Piper
PA-28-140
Fixed-wing, single engine Individual owner
Florida
Standard 2021-04-01 ValidFAA registration status code V: Valid registration. All codes
N79095 Cessna
172K
Fixed-wing, single engine Hole In the Clouds Rentals LLC
Montgomery, Alabama
Standard 2021-04-01 ValidFAA registration status code V: Valid registration. All codes
N177XP Cessna
177
Fixed-wing, single engine Co-owned owner
Arizona
Standard 2021-03-31 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 9, 2026. Horsepower and thrust are the FAA's figures for the series, not for a particular aircraft.