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
N5052T Piper
PA-28-140
Fixed-wing, single engine Co-owned owner
Washington
Standard 2023-06-03 ValidFAA registration status code V: Valid registration. All codes
N61700 Cessna
172M
Fixed-wing, single engine Individual owner
Florida
Standard 2023-06-03 ValidFAA registration status code V: Valid registration. All codes
N64240 Cessna
172M
Fixed-wing, single engine Lazy Eights Holdings LLC
Greenwood, Indiana
Standard 2023-06-03 ValidFAA registration status code V: Valid registration. All codes
N7183Q Cessna
172L
Fixed-wing, single engine Flying Wild LLC
Yarmouth, Maine
Standard 2023-06-03 ValidFAA registration status code V: Valid registration. All codes
N8114D Piper
PA-22-160
Fixed-wing, single engine Farago John A
Grapevine, Texas
Standard 2023-06-03 ValidFAA registration status code V: Valid registration. All codes
N9737L Beech
B19
Fixed-wing, single engine Steber Ronald J
Hazleton, Pennsylvania
Standard 2023-06-03 ValidFAA registration status code V: Valid registration. All codes
N187RA American Champion Aircraft
7GCAA
Fixed-wing, single engine Co-owned owner
Texas
Standard 2023-06-02 ValidFAA registration status code V: Valid registration. All codes
N43181 Piper
PA-28-151
Fixed-wing, single engine New Mexico Flying Eagle INC DBA
Tucson, Arizona
Standard 2023-06-02 ValidFAA registration status code V: Valid registration. All codes
N4546R Piper
PA-28-140
Fixed-wing, single engine Dr SE Flight Services LLC
Kansas City, Missouri
Standard 2023-06-02 ValidFAA registration status code V: Valid registration. All codes
N50568 Bellanca
7GCBC
Fixed-wing, single engine Co-owned owner
Colorado
Standard 2023-06-02 ValidFAA registration status code V: Valid registration. All codes
N734AM Cessna
172N
Fixed-wing, single engine Global Flight Training Solutions INC
Immokalee, Florida
Standard 2023-06-02 ValidFAA registration status code V: Valid registration. All codes
N30378 Piper
PA-28-161
Fixed-wing, single engine Co-owned owner
California
Standard 2023-06-01 ValidFAA registration status code V: Valid registration. All codes
N3109Z Piper
PA-22-160
Fixed-wing, single engine Individual owner
Utah
Standard 2023-06-01 ValidFAA registration status code V: Valid registration. All codes
N5661U Piper
PA-28-140
Fixed-wing, single engine Skyventure LLC
Washington, Indiana
Standard 2023-06-01 ValidFAA registration status code V: Valid registration. All codes
N5971U Piper
PA-28-140
Fixed-wing, single engine Withheld at owner's request
Standard 2023-06-01 ValidFAA registration status code V: Valid registration. All codes
N6787H Cessna
172M
Fixed-wing, single engine Individual owner
Wisconsin
Standard 2023-06-01 ValidFAA registration status code V: Valid registration. All codes
N7278D Piper
PA-18A 150
Fixed-wing, single engine Co-owned owner
Alabama
Standard 2023-06-01 ValidFAA registration status code V: Valid registration. All codes
N80181 Cessna
172M
Fixed-wing, single engine Vero Technical Support INC
Pensacola, Florida
Standard 2023-06-01 ValidFAA registration status code V: Valid registration. All codes
N82318 Piper
PA-28-161
Fixed-wing, single engine Aero Nautical Adventure LLC
Camano Island, Washington
Standard 2023-06-01 ValidFAA registration status code V: Valid registration. All codes
N8418R Piper
PA-28-140
Fixed-wing, single engine Individual owner
Iowa
Standard 2023-06-01 ValidFAA registration status code V: Valid registration. All codes
N9713U Grumman American Avn. Corp.
AA-5A
Fixed-wing, single engine Individual owner
New Mexico
Standard 2023-06-01 ValidFAA registration status code V: Valid registration. All codes
N12757 Piper
PA-28-140
Fixed-wing, single engine Altitude Aviation Group LLC
Christmas, Florida
Standard 2023-05-31 ValidFAA registration status code V: Valid registration. All codes
N15593 Piper
PA-28-140
Fixed-wing, single engine Individual owner
Florida
Standard 2023-05-31 ValidFAA registration status code V: Valid registration. All codes
N1738J Piper
PA-28-140
Fixed-wing, single engine Piper 38J LLC
Buckeye, Arizona
Standard 2023-05-31 ValidFAA registration status code V: Valid registration. All codes
N2218L Beech
B19
Fixed-wing, single engine Individual owner
California
Standard 2023-05-31 ValidFAA registration status code V: Valid registration. All codes
N3546E Cessna
172N
Fixed-wing, single engine Individual owner
Pennsylvania
Standard 2023-05-31 ValidFAA registration status code V: Valid registration. All codes
N40238 Robinson Helicopter
R22 BETA
Helicopter Blue Ridge Community College
Weyers Cave, Virginia
Multiple 2023-05-31 ValidFAA registration status code V: Valid registration. All codes
N5215D Cessna
172N
Fixed-wing, single engine Aviation Trust CO LLC Trustee
Oklahoma City, Oklahoma
Standard 2023-05-31 ValidFAA registration status code V: Valid registration. All codes
N734TD Cessna
172N
Fixed-wing, single engine Decolagem Aviation LLC
Woodbridge, Virginia
Standard 2023-05-31 ValidFAA registration status code V: Valid registration. All codes
N745CW Osborn James Harold
GLASAIR SH-2
Fixed-wing, single engine Co-owned owner
Idaho
Experimental 2023-05-31 ValidFAA registration status code V: Valid registration. All codes
N82505 Piper
PA-18-150
Fixed-wing, single engine Individual owner
California
Standard 2023-05-31 ValidFAA registration status code V: Valid registration. All codes
N9920U Grumman American Avn. Corp.
AA-5A
Fixed-wing, single engine Qualitair LLC Trustee
Michelstadt,
Standard 2023-05-31 ValidFAA registration status code V: Valid registration. All codes
N1551V Cessna
172M
Fixed-wing, single engine Bumpe Logistics LLC
South Jordan, Utah
Standard 2023-05-30 ValidFAA registration status code V: Valid registration. All codes
N20175 Cessna
172M
Fixed-wing, single engine Jet Air Solutions INC
Fort Myers, Florida
Standard 2023-05-30 ValidFAA registration status code V: Valid registration. All codes
N4575F Piper
PA-28-151
Fixed-wing, single engine Sky West Aviation INC Trustee
Albuquerque, New Mexico
Standard 2023-05-30 ValidFAA registration status code V: Valid registration. All codes
N601LA Robinson Helicopter
R22 BETA
Helicopter Individual owner
Kentucky
Standard 2023-05-30 ValidFAA registration status code V: Valid registration. All codes
N611WK William L Sharpe
GLASTAR GS-1
Fixed-wing, single engine Co-owned owner
Florida
Experimental 2023-05-30 ValidFAA registration status code V: Valid registration. All codes
N9152K Piper
PA-28-151
Fixed-wing, single engine Hangar 9 INC
Aberdeen, South Dakota
Standard 2023-05-30 ValidFAA registration status code V: Valid registration. All codes
N9405P Piper
PA-18-150
Fixed-wing, single engine Individual owner
Alaska
Standard 2023-05-30 ValidFAA registration status code V: Valid registration. All codes
N26EV Grumman American Avn. Corp.
AA-5A
Fixed-wing, single engine N26Ev LLC
Pine, Colorado
Standard 2023-05-29 ValidFAA registration status code V: Valid registration. All codes
N2766P Piper
PA-22
Fixed-wing, single engine Co-owned owner
Missouri
Standard 2023-05-29 ValidFAA registration status code V: Valid registration. All codes
N3230T Cessna
177
Fixed-wing, single engine Lsao LLC
Shelbyville, Illinois
Standard 2023-05-29 ValidFAA registration status code V: Valid registration. All codes
N35474 Cessna
172I
Fixed-wing, single engine Co-owned owner
Kansas
Standard 2023-05-29 ValidFAA registration status code V: Valid registration. All codes
N44013 Piper
PA-28-151
Fixed-wing, single engine Up and Down Aviation LLC
Perry, Georgia
Standard 2023-05-29 ValidFAA registration status code V: Valid registration. All codes
N5245W Piper
PA-28-160
Fixed-wing, single engine Individual owner
Pennsylvania
Standard 2023-05-29 ValidFAA registration status code V: Valid registration. All codes
N5944D Piper
PA-22-150
Fixed-wing, single engine Individual owner
South Carolina
Standard 2023-05-29 ValidFAA registration status code V: Valid registration. All codes
N6762B Piper
PA-18A 150
Fixed-wing, single engine Individual owner
Florida
Multiple 2023-05-29 ValidFAA registration status code V: Valid registration. All codes
N75770 Cessna
172N
Fixed-wing, single engine Co-owned owner
North Carolina
Standard 2023-05-29 ValidFAA registration status code V: Valid registration. All codes
N802FS Piper
PA-28-140
Fixed-wing, single engine Individual owner
Georgia
Standard 2023-05-29 ValidFAA registration status code V: Valid registration. All codes
N6967C Piper
PA-28-161
Fixed-wing, single engine Up and Down Aviation LLC
Perry, Georgia
Standard 2023-05-28 ValidFAA registration status code V: Valid registration. All codes
N33169 Piper
PA-28-151
Fixed-wing, single engine Individual owner
California
Standard 2023-05-27 ValidFAA registration status code V: Valid registration. All codes
N5149R Cessna
172M
Fixed-wing, single engine 5149R LLC
Manhattan, Montana
Standard 2023-05-27 ValidFAA registration status code V: Valid registration. All codes
N5465W Piper
PA-28-150
Fixed-wing, single engine Co-owned owner
Ohio
Standard 2023-05-27 ValidFAA registration status code V: Valid registration. All codes
N6628W Piper
PA-28-140
Fixed-wing, single engine Individual owner
Nevada
Standard 2023-05-27 ValidFAA registration status code V: Valid registration. All codes
N739XL Cessna
172N
Fixed-wing, single engine Flyrjf LLC
Weirsdale, Florida
Standard 2023-05-27 ValidFAA registration status code V: Valid registration. All codes
N7983G Cessna
172L
Fixed-wing, single engine Co-owned owner
Oklahoma
Standard 2023-05-27 ValidFAA registration status code V: Valid registration. All codes
N9401P Piper
PA-18-150
Fixed-wing, single engine Granite Aviation LLC
Belgrade, Montana
Standard 2023-05-27 ValidFAA registration status code V: Valid registration. All codes
N2918V Callair
A-2
Fixed-wing, single engine Individual owner
Montana
Standard 2023-05-26 ValidFAA registration status code V: Valid registration. All codes
N30579 Cessna
172M
Fixed-wing, single engine Dry Creek Services LLC
Lodi, Ohio
Standard 2023-05-26 ValidFAA registration status code V: Valid registration. All codes
N38859 Piper
PA-28-161
Fixed-wing, single engine Castlerock Realty Investments LLC
Visalia, California
Standard 2023-05-26 ValidFAA registration status code V: Valid registration. All codes
N4630V Varga Aircraft Corp.
2150A
Fixed-wing, single engine Individual owner
California
Standard 2023-05-26 ValidFAA registration status code V: Valid registration. All codes
N6105W Piper
PA-28-140
Fixed-wing, single engine Individual owner
California
Standard 2023-05-26 ValidFAA registration status code V: Valid registration. All codes
N734VE Cessna
172N
Fixed-wing, single engine Flyby Aviation LLC
Logan, Utah
Standard 2023-05-26 ValidFAA registration status code V: Valid registration. All codes
N734YC Cessna
172N
Fixed-wing, single engine Individual owner
Washington
Standard 2023-05-26 ValidFAA registration status code V: Valid registration. All codes
N7763W Piper
PA-28-180
Fixed-wing, single engine Co-owned owner
Texas
Standard 2023-05-26 ValidFAA registration status code V: Valid registration. All codes
N13701 Cessna
172M
Fixed-wing, single engine M-A-R-S Aircraft Leasing LLC
Williamsburg, Virginia
Standard 2023-05-25 ValidFAA registration status code V: Valid registration. All codes
N18DP Piper
PA-18-150
Fixed-wing, single engine Individual owner
Minnesota
Restricted 2023-05-25 ValidFAA registration status code V: Valid registration. All codes
N21CK Kendall Clifford L
RV 3A
Fixed-wing, single engine Matrix Commerce Solutions LLC
Pt Pleas Bch, New Jersey
Experimental 2023-05-25 ValidFAA registration status code V: Valid registration. All codes
N3642M Piper
PA-12
Fixed-wing, single engine Individual owner
Arkansas
Standard 2023-05-25 ValidFAA registration status code V: Valid registration. All codes
N4085P Piper
PA-23-160
Fixed-wing, multi-engine Tango Bravo Aviation LLC
Taylorsville, Mississippi
Standard 2023-05-25 ValidFAA registration status code V: Valid registration. All codes
N4403X Piper
PA-28-151
Fixed-wing, single engine N4403X LLC
St Thomas, U.S. Virgin Islands
Standard 2023-05-25 ValidFAA registration status code V: Valid registration. All codes
N64728 Cessna
172P
Fixed-wing, single engine Systir Aviation LLC
Pittsburgh, Pennsylvania
Standard 2023-05-25 ValidFAA registration status code V: Valid registration. All codes
N776AC American Champion Aircraft
7GCBC
Fixed-wing, single engine Individual owner
Massachusetts
Standard 2023-05-25 ValidFAA registration status code V: Valid registration. All codes
N9656Q Cessna
172M
Fixed-wing, single engine Co-owned owner
Florida
Standard 2023-05-25 ValidFAA registration status code V: Valid registration. All codes
N1226U Cessna
172M
Fixed-wing, single engine Airborne LLC
Wilmington, Delaware
Standard 2023-05-24 ValidFAA registration status code V: Valid registration. All codes
N1260T Piper
PA-28-140
Fixed-wing, single engine Red Rock Flying School LLC
Mesa, Arizona
Standard 2023-05-24 ValidFAA registration status code V: Valid registration. All codes
N26830 Gulfstream American Corp
AA-5A
Fixed-wing, single engine Individual owner
West Virginia
Standard 2023-05-24 ValidFAA registration status code V: Valid registration. All codes
N3421P Piper
PA-18-150
Fixed-wing, single engine Co-owned owner
Oregon
Restricted 2023-05-24 ValidFAA registration status code V: Valid registration. All codes
N3917X Piper
PA-28-151
Fixed-wing, single engine Van Anda Aviation LLC
Apopka, Florida
Standard 2023-05-24 ValidFAA registration status code V: Valid registration. All codes
N4232J Piper
PA-28-140
Fixed-wing, single engine N4232J LLC
Waialua, Hawaii
Standard 2023-05-24 ValidFAA registration status code V: Valid registration. All codes
N429AC American Champion Aircraft
7GCAA
Fixed-wing, single engine Stewart Industries LTD
Monmouth, Illinois
Standard 2023-05-24 ValidFAA registration status code V: Valid registration. All codes
N4309Z Piper
PA-18-150
Fixed-wing, single engine Individual owner
Alaska
Multiple 2023-05-24 ValidFAA registration status code V: Valid registration. All codes
N4550X Piper
PA-28-140
Fixed-wing, single engine Altitude LLC
Madison, Wisconsin
Standard 2023-05-24 ValidFAA registration status code V: Valid registration. All codes
N5165W Piper
PA-28-150
Fixed-wing, single engine Metro Flyers LLC
Jackson, Mississippi
Standard 2023-05-24 ValidFAA registration status code V: Valid registration. All codes
N574DE Cessna
172M
Fixed-wing, single engine Muggsys Aviation Services LLC
Crittenden, Kentucky
Standard 2023-05-24 ValidFAA registration status code V: Valid registration. All codes
N6233D Cessna
172N
Fixed-wing, single engine Individual owner
California
Standard 2023-05-24 ValidFAA registration status code V: Valid registration. All codes
N6306W Piper
PA-28-140
Fixed-wing, single engine Individual owner
Ohio
Standard 2023-05-24 ValidFAA registration status code V: Valid registration. All codes
N6845Z Piper
PA-18-150
Fixed-wing, single engine Br Trucking LLC
Cut Bank, Montana
Multiple 2023-05-24 ValidFAA registration status code V: Valid registration. All codes
N83JR Ray James C
GLASAIR TG 1
Fixed-wing, single engine Individual owner
Washington
Experimental 2023-05-24 ValidFAA registration status code V: Valid registration. All codes
N86EC Piper
PA-28-140
Fixed-wing, single engine Individual owner
California
Standard 2023-05-24 ValidFAA registration status code V: Valid registration. All codes
N9444D Piper
PA-18A 150
Fixed-wing, single engine Individual owner
Alaska
Standard 2023-05-24 ValidFAA registration status code V: Valid registration. All codes
N9505H Cessna
172M
Fixed-wing, single engine Final Approach Aviation LLC
Danville, California
Standard 2023-05-24 ValidFAA registration status code V: Valid registration. All codes
N960FS Cessna
172M
Fixed-wing, single engine Southern Aero LLC
Homestead, Florida
Standard 2023-05-24 ValidFAA registration status code V: Valid registration. All codes
N21GR Robinson Dennis R
ROBINSON/PITTS S1S
Fixed-wing, single engine Individual owner
Kansas
Experimental 2023-05-23 ValidFAA registration status code V: Valid registration. All codes
N2362Z Beech
23
Fixed-wing, single engine Individual owner
Idaho
Standard 2023-05-23 ValidFAA registration status code V: Valid registration. All codes
N244BM Piper
PA-28-151
Fixed-wing, single engine Cape Fear Aviation Maintenance LLC
Fayetteville, North Carolina
Standard 2023-05-23 ValidFAA registration status code V: Valid registration. All codes
N321DN Piper
PA-28-140
Fixed-wing, single engine Brookway Aviation LLC
Brookhaven, Mississippi
Standard 2023-05-23 ValidFAA registration status code V: Valid registration. All codes
N4192Y Bellanca
7GCBC
Fixed-wing, single engine Dragon Grass LLC
Nashua, New Hampshire
Standard 2023-05-23 ValidFAA registration status code V: Valid registration. All codes
N5636U Piper
PA-28-140
Fixed-wing, single engine Individual owner
Ohio
Standard 2023-05-23 ValidFAA registration status code V: Valid registration. All codes
N5767D Piper
PA-18-150
Fixed-wing, single engine Northern Lights Ventures LLC
Moose Pass, Alaska
Standard 2023-05-23 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.