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
N54946 Cessna
172P
Fixed-wing, single engine Goosfraba LLC
Huddleston, Virginia
Standard 2022-05-18 ValidFAA registration status code V: Valid registration. All codes
N5924U Piper
PA-28-140
Fixed-wing, single engine Organization of Black Aerospace Professionals INC
Westchester, Illinois
Standard 2022-05-18 ValidFAA registration status code V: Valid registration. All codes
N9876W Piper
PA-28-140
Fixed-wing, single engine Co-owned owner
Texas
Standard 2022-05-18 ValidFAA registration status code V: Valid registration. All codes
N4427A Piper
PA-22-150
Fixed-wing, single engine Individual owner
California
Standard 2022-05-17 ValidFAA registration status code V: Valid registration. All codes
N5147H Cessna
172M
Fixed-wing, single engine Beyond Willpower INC
Shreveport, Louisiana
Standard 2022-05-17 ValidFAA registration status code V: Valid registration. All codes
N63352 Cessna
172P
Fixed-wing, single engine Carter Flygare INC
Sacramento, California
Standard 2022-05-17 ValidFAA registration status code V: Valid registration. All codes
N7081R Piper
PA-28-140
Fixed-wing, single engine Individual owner
Arizona
Standard 2022-05-17 ValidFAA registration status code V: Valid registration. All codes
N3787Z Piper
PA-18-150
Fixed-wing, single engine Easterday Jay A
Wilder, Idaho
Standard 2022-05-16 ValidFAA registration status code V: Valid registration. All codes
N1968P Piper
PA-18A
Fixed-wing, single engine Individual owner
Alaska
Standard 2022-05-14 ValidFAA registration status code V: Valid registration. All codes
N289JK Cessna
172N
Fixed-wing, single engine Flightpath Aviation Services INC
Brooksville, Florida
Standard 2022-05-14 ValidFAA registration status code V: Valid registration. All codes
N31634 Piper
PA-28-161
Fixed-wing, single engine Individual owner
Texas
Standard 2022-05-14 ValidFAA registration status code V: Valid registration. All codes
N336AF Cessna
172L
Fixed-wing, single engine Individual owner
California
Standard 2022-05-14 ValidFAA registration status code V: Valid registration. All codes
N6624G Cessna
172N
Fixed-wing, single engine Bob Hoover Academy
Salinas, California
Standard 2022-05-14 ValidFAA registration status code V: Valid registration. All codes
N7124Q Cessna
172L
Fixed-wing, single engine Vy Aviation LLC
Gentry, Arkansas
Standard 2022-05-14 ValidFAA registration status code V: Valid registration. All codes
N7367J Piper
PA-28-140
Fixed-wing, single engine Individual owner
Alaska
Standard 2022-05-14 ValidFAA registration status code V: Valid registration. All codes
N9899U Grumman American Avn. Corp.
AA-5A
Fixed-wing, single engine Individual owner
Montana
Standard 2022-05-14 ValidFAA registration status code V: Valid registration. All codes
N128DP Piper
PA-28-140
Fixed-wing, single engine Individual owner
California
Standard 2022-05-13 ValidFAA registration status code V: Valid registration. All codes
N3412T Cessna
177
Fixed-wing, single engine C177Knotclub LLC
Springfield, Illinois
Standard 2022-05-13 ValidFAA registration status code V: Valid registration. All codes
N63694 Cessna
172P
Fixed-wing, single engine Upper Valley Aero LLC
Hanover, New Hampshire
Standard 2022-05-13 ValidFAA registration status code V: Valid registration. All codes
N128JD Dane Julie
RV6A
Fixed-wing, single engine Individual owner
New Mexico
Experimental 2022-05-12 ValidFAA registration status code V: Valid registration. All codes
N211NJ Piper
PA-28-161
Fixed-wing, single engine Coco Aircraft INC
Merritt Island, Florida
Standard 2022-05-12 ValidFAA registration status code V: Valid registration. All codes
N3463Z Piper
PA-22-160
Fixed-wing, single engine Individual owner
Ohio
Standard 2022-05-12 ValidFAA registration status code V: Valid registration. All codes
N679TS Piper
PA-28-161
Fixed-wing, single engine Coco Aircraft INC
Merritt Island, Florida
Standard 2022-05-12 ValidFAA registration status code V: Valid registration. All codes
N3030E Cessna
172N
Fixed-wing, single engine Elon Aviation LLC
Burlington, North Carolina
Standard 2022-05-11 ValidFAA registration status code V: Valid registration. All codes
N509SM Cessna
172M
Fixed-wing, single engine Co-owned owner
Washington
Standard 2022-05-11 ValidFAA registration status code V: Valid registration. All codes
N5950K Piper
PA-28-161
Fixed-wing, single engine Coco Aircraft INC
Merritt Island, Florida
Standard 2022-05-11 ValidFAA registration status code V: Valid registration. All codes
N73744 Cessna
172N
Fixed-wing, single engine Fca Flight Center INC
Fitchburg, Massachusetts
Standard 2022-05-11 ValidFAA registration status code V: Valid registration. All codes
N9902Y Champion
7GCB
Fixed-wing, single engine Jeepers LLC
New York, New York
Standard 2022-05-11 ValidFAA registration status code V: Valid registration. All codes
N33107 Piper
PA-28-140
Fixed-wing, single engine Florida Coastal Flying Club LLC
Titusville, Florida
Standard 2022-05-10 ValidFAA registration status code V: Valid registration. All codes
N6823W Piper
PA-28-140
Fixed-wing, single engine Individual owner
Delaware
Standard 2022-05-10 ValidFAA registration status code V: Valid registration. All codes
N737JJ Cessna
172N
Fixed-wing, single engine Avid Aviation LLC
Gilbert, Arizona
Standard 2022-05-10 ValidFAA registration status code V: Valid registration. All codes
N84143 Cessna
172K
Fixed-wing, single engine Individual owner
Guam
Standard 2022-05-10 ValidFAA registration status code V: Valid registration. All codes
N29340 Cessna
177
Fixed-wing, single engine Individual owner
South Carolina
Standard 2022-05-09 ValidFAA registration status code V: Valid registration. All codes
N54041 Cessna
172P
Fixed-wing, single engine Individual owner
Florida
Standard 2022-05-09 ValidFAA registration status code V: Valid registration. All codes
N9734U Grumman American Avn. Corp.
AA-5A
Fixed-wing, single engine Sls Aviation LLC
Poquoson, Virginia
Standard 2022-05-09 ValidFAA registration status code V: Valid registration. All codes
N63101 Cessna
172P
Fixed-wing, single engine Individual owner
Massachusetts
Standard 2022-05-07 ValidFAA registration status code V: Valid registration. All codes
N37D Bellanca
7GCBC
Fixed-wing, single engine Aero Equities LLC
Ventura, California
Standard 2022-05-06 ValidFAA registration status code V: Valid registration. All codes
N3956P Piper
PA-22-150
Fixed-wing, single engine Wheels Up LLC
Evansville, Indiana
Standard 2022-05-06 ValidFAA registration status code V: Valid registration. All codes
N4210J Piper
PA-28-140
Fixed-wing, single engine Individual owner
Michigan
Standard 2022-05-06 ValidFAA registration status code V: Valid registration. All codes
N643G Cessna
150K
Fixed-wing, single engine Air Leasing INC
Evanston, Illinois
Standard 2022-05-06 ValidFAA registration status code V: Valid registration. All codes
N8329V Champion
7GCAA
Fixed-wing, single engine Individual owner
Maine
Standard 2022-05-06 ValidFAA registration status code V: Valid registration. All codes
N98363 Piper
PA-28-140
Fixed-wing, single engine Individual owner
Arizona
Standard 2022-05-06 ValidFAA registration status code V: Valid registration. All codes
N4408A Piper
PA-22-150
Fixed-wing, single engine Individual owner
Ohio
Standard 2022-05-05 ValidFAA registration status code V: Valid registration. All codes
N46962 Interstate
S-1B1
Fixed-wing, single engine Individual owner
Alaska
Experimental 2022-05-05 ValidFAA registration status code V: Valid registration. All codes
N5377W Piper
PA-28-160
Fixed-wing, single engine Individual owner
Alabama
Standard 2022-05-05 ValidFAA registration status code V: Valid registration. All codes
N80497 Cessna
172M
Fixed-wing, single engine Ducksrus LLC
Indianapolis, Indiana
Standard 2022-05-05 ValidFAA registration status code V: Valid registration. All codes
N118U Piper
PA-22
Fixed-wing, single engine Individual owner
Alaska
Standard 2022-05-04 ValidFAA registration status code V: Valid registration. All codes
N19729 Cessna
172L
Fixed-wing, single engine Individual owner
Texas
Standard 2022-05-04 ValidFAA registration status code V: Valid registration. All codes
N4320J Piper
PA-28-140
Fixed-wing, single engine Individual owner
Utah
Standard 2022-05-04 ValidFAA registration status code V: Valid registration. All codes
N6511T Beech
19A
Fixed-wing, single engine Individual owner
Florida
Standard 2022-05-04 ValidFAA registration status code V: Valid registration. All codes
N6724W Piper
PA-28-140
Fixed-wing, single engine Individual owner
North Carolina
Standard 2022-05-04 ValidFAA registration status code V: Valid registration. All codes
N2269L Grumman American Avn. Corp.
AA-5
Fixed-wing, single engine Individual owner
Ohio
Standard 2022-05-03 ValidFAA registration status code V: Valid registration. All codes
N52344 Cessna
172P
Fixed-wing, single engine My Toys INC
Spartanburg, South Carolina
Standard 2022-05-03 ValidFAA registration status code V: Valid registration. All codes
N8823N Piper
PA-28-140
Fixed-wing, single engine Avia Flight Academy
Stratford, Connecticut
Standard 2022-05-03 ValidFAA registration status code V: Valid registration. All codes
N4301A Piper
PA-22-150
Fixed-wing, single engine Individual owner
California
Standard 2022-05-02 ValidFAA registration status code V: Valid registration. All codes
N6947B Piper
PA-22-150
Fixed-wing, single engine B&R Aerial Crop Care INC
Connell, Washington
Multiple 2022-05-02 ValidFAA registration status code V: Valid registration. All codes
N108SU Cessna
172P
Fixed-wing, single engine Individual owner
New York
Standard 2022-04-30 ValidFAA registration status code V: Valid registration. All codes
N1651E Cessna
172N
Fixed-wing, single engine Individual owner
North Carolina
Standard 2022-04-30 ValidFAA registration status code V: Valid registration. All codes
N32573 Piper
PA-28-151
Fixed-wing, single engine Co-owned owner
Virginia
Standard 2022-04-30 ValidFAA registration status code V: Valid registration. All codes
N5563U Piper
PA-28-140
Fixed-wing, single engine Individual owner
Maryland
Standard 2022-04-30 ValidFAA registration status code V: Valid registration. All codes
N15569 Piper
PA-28-140
Fixed-wing, single engine Flight Unlimited INC
Minneapolis, Minnesota
Standard 2022-04-29 ValidFAA registration status code V: Valid registration. All codes
N3334T Cessna
177
Fixed-wing, single engine Individual owner
Illinois
Standard 2022-04-29 ValidFAA registration status code V: Valid registration. All codes
N56756 Piper
PA-28-140
Fixed-wing, single engine Individual owner
California
Standard 2022-04-29 ValidFAA registration status code V: Valid registration. All codes
N5971W Piper
PA-28-160
Fixed-wing, single engine Individual owner
Missouri
Standard 2022-04-29 ValidFAA registration status code V: Valid registration. All codes
N6456R Piper
PA-28-140
Fixed-wing, single engine Individual owner
Texas
Standard 2022-04-29 ValidFAA registration status code V: Valid registration. All codes
N739UK Cessna
172N
Fixed-wing, single engine Carmel Aviation INC
Boise, Idaho
Standard 2022-04-29 ValidFAA registration status code V: Valid registration. All codes
N8411R Piper
PA-28-140
Fixed-wing, single engine Eleven Romeo LLC
Golden, Colorado
Standard 2022-04-29 ValidFAA registration status code V: Valid registration. All codes
N9123K Piper
PA-28-151
Fixed-wing, single engine Individual owner
Mississippi
Standard 2022-04-29 ValidFAA registration status code V: Valid registration. All codes
N9635Q Cessna
172M
Fixed-wing, single engine Individual owner
Florida
Standard 2022-04-29 ValidFAA registration status code V: Valid registration. All codes
N9851D Piper
PA-18A 150
Fixed-wing, single engine Skarda Flying Service INC
De Valls Bluff, Arkansas
Multiple 2022-04-29 ValidFAA registration status code V: Valid registration. All codes
N16526 Piper
PA-28-140
Fixed-wing, single engine Individual owner
California
Standard 2022-04-28 ValidFAA registration status code V: Valid registration. All codes
N20012 Cessna
172M
Fixed-wing, single engine Co-owned owner
North Carolina
Standard 2022-04-28 ValidFAA registration status code V: Valid registration. All codes
N32816 Piper
PA-28-151
Fixed-wing, single engine Williamson Flying Club INC
Williamson, New York
Standard 2022-04-28 ValidFAA registration status code V: Valid registration. All codes
N4294J Piper
PA-28-140
Fixed-wing, single engine Individual owner
Pennsylvania
Standard 2022-04-28 ValidFAA registration status code V: Valid registration. All codes
N5856D Piper
PA-22-150
Fixed-wing, single engine Individual owner
Wisconsin
Standard 2022-04-28 ValidFAA registration status code V: Valid registration. All codes
N6995B Piper
PA-18A 150
Fixed-wing, single engine Individual owner
Alaska
Standard 2022-04-28 ValidFAA registration status code V: Valid registration. All codes
N7487G Cessna
172K
Fixed-wing, single engine Rich Aviation Services LLC
Fort Worth, Texas
Standard 2022-04-28 ValidFAA registration status code V: Valid registration. All codes
N3718S Seraphinoff Nick O
RV-6
Fixed-wing, single engine Sandlapper Aviation of de INC
Bennington, Vermont
Experimental 2022-04-26 ValidFAA registration status code V: Valid registration. All codes
N539PB Cessna
172M
Fixed-wing, single engine Individual owner
Texas
Standard 2022-04-26 ValidFAA registration status code V: Valid registration. All codes
N55PT Piper
PA-18-135
Fixed-wing, single engine Individual owner
Alaska
Standard 2022-04-26 ValidFAA registration status code V: Valid registration. All codes
N61960 Cessna
172M
Fixed-wing, single engine Individual owner
Idaho
Standard 2022-04-26 ValidFAA registration status code V: Valid registration. All codes
N79898 Cessna
172K
Fixed-wing, single engine Aero Quest LLC
Olive Branch, Mississippi
Standard 2022-04-26 ValidFAA registration status code V: Valid registration. All codes
N811BJ Cessna
172N
Fixed-wing, single engine Six Pack Aviation LLC
Pocono Pines, Pennsylvania
Standard 2022-04-26 ValidFAA registration status code V: Valid registration. All codes
N84784 Cessna
172K
Fixed-wing, single engine Individual owner
California
Standard 2022-04-26 ValidFAA registration status code V: Valid registration. All codes
N853AK Charles J Kase
KASE KUB
Fixed-wing, single engine Individual owner
Alaska
Experimental 2022-04-26 ValidFAA registration status code V: Valid registration. All codes
N5125X Whiting Cleon
GLASAIR SH-2
Fixed-wing, single engine Individual owner
Florida
Experimental 2022-04-25 ValidFAA registration status code V: Valid registration. All codes
N9720W Piper
PA-28-140
Fixed-wing, single engine Individual owner
Missouri
Standard 2022-04-25 ValidFAA registration status code V: Valid registration. All codes
N12395 Cessna
172M
Fixed-wing, single engine Consolidated Aviation Services LLC
Seymour, Tennessee
Standard 2022-04-23 ValidFAA registration status code V: Valid registration. All codes
N5867L American
AA-5
Fixed-wing, single engine Individual owner
Wisconsin
Standard 2022-04-23 ValidFAA registration status code V: Valid registration. All codes
N9704D Piper
PA-22-160
Fixed-wing, single engine Individual owner
Alaska
Standard 2022-04-23 ValidFAA registration status code V: Valid registration. All codes
N3348V Jon Sullivan
VANS V-4
Fixed-wing, single engine Individual owner
Nebraska
Experimental 2022-04-22 ValidFAA registration status code V: Valid registration. All codes
N79146 Cessna
172K
Fixed-wing, single engine Individual owner
Texas
Standard 2022-04-22 ValidFAA registration status code V: Valid registration. All codes
N1408T Piper
PA-28-140
Fixed-wing, single engine Individual owner
Arkansas
Standard 2022-04-21 ValidFAA registration status code V: Valid registration. All codes
N2771P Piper
PA-18A 150
Fixed-wing, single engine Weyrauch Paul H
Ray, North Dakota
Multiple 2022-04-21 ValidFAA registration status code V: Valid registration. All codes
N40850 Piper
PA-28-140
Fixed-wing, single engine Individual owner
Alabama
Standard 2022-04-21 ValidFAA registration status code V: Valid registration. All codes
N43695 Piper
PA-28-151
Fixed-wing, single engine Co-owned owner
Louisiana
Standard 2022-04-21 ValidFAA registration status code V: Valid registration. All codes
N4540R Piper
PA-28-140
Fixed-wing, single engine Individual owner
North Carolina
Standard 2022-04-21 ValidFAA registration status code V: Valid registration. All codes
N737RR Cessna
172N
Fixed-wing, single engine Mindy Limited LLC
Muscatine, Iowa
Standard 2022-04-21 ValidFAA registration status code V: Valid registration. All codes
N9047L Champion
7GCAA
Fixed-wing, single engine Individual owner
Texas
Standard 2022-04-21 ValidFAA registration status code V: Valid registration. All codes
N1853J Piper
PA-28-140
Fixed-wing, single engine Individual owner
Washington
Standard 2022-04-20 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.