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
N2159H Piper
PA-28-161
Fixed-wing, single engine Beverly Flight Center LLC
Middleton, Massachusetts
Standard 2022-03-01 ValidFAA registration status code V: Valid registration. All codes
N3522E Cessna
172N
Fixed-wing, single engine Co-owned owner
California
Standard 2022-03-01 ValidFAA registration status code V: Valid registration. All codes
N747KK Cessna
172N
Fixed-wing, single engine Hawaii Pacific Aviation INC
Kailua Kona, Hawaii
Standard 2022-03-01 ValidFAA registration status code V: Valid registration. All codes
N6129J Piper
PA-28-140
Fixed-wing, single engine Blue Skies Aircraft LLC
Kalispell, Montana
Standard 2022-02-28 ValidFAA registration status code V: Valid registration. All codes
N7709D Piper
PA-22-150
Fixed-wing, single engine Ak8 Assets LLC
Talkeetna, Alaska
Multiple 2022-02-28 ValidFAA registration status code V: Valid registration. All codes
N78624 Cessna
172K
Fixed-wing, single engine Individual owner
Pennsylvania
Standard 2022-02-28 ValidFAA registration status code V: Valid registration. All codes
N80106 Cessna
172M
Fixed-wing, single engine American Patrols INC
Midland, Texas
Standard 2022-02-28 ValidFAA registration status code V: Valid registration. All codes
N80SB Lippert Barry M
MA-5 CHARGER
Fixed-wing, single engine Individual owner
California
Experimental 2022-02-28 ValidFAA registration status code V: Valid registration. All codes
N8356J Varga Aircraft Corp.
2150A
Fixed-wing, single engine Individual owner
California
Standard 2022-02-28 ValidFAA registration status code V: Valid registration. All codes
N8831N Piper
PA-28-140
Fixed-wing, single engine Allen Aviation LLC
Mansfield, Massachusetts
Standard 2022-02-28 ValidFAA registration status code V: Valid registration. All codes
N1121X Piper
PA-28-151
Fixed-wing, single engine Crosscheck Ftc LLC
Niceville, Florida
Standard 2022-02-26 ValidFAA registration status code V: Valid registration. All codes
N172EQ Cessna
172M
Fixed-wing, single engine Co-owned owner
Delaware
Standard 2022-02-26 ValidFAA registration status code V: Valid registration. All codes
N1860T Piper
PA-28-140
Fixed-wing, single engine Co-owned owner
Nebraska
Standard 2022-02-26 ValidFAA registration status code V: Valid registration. All codes
N2263Y Cessna
177
Fixed-wing, single engine Individual owner
California
Standard 2022-02-26 ValidFAA registration status code V: Valid registration. All codes
N2301T Piper
PA-28-140
Fixed-wing, single engine Marks Aviation LLC
Isle of Palms, South Carolina
Standard 2022-02-26 ValidFAA registration status code V: Valid registration. All codes
N3029M Piper
PA-12
Fixed-wing, single engine Individual owner
Alaska
Standard 2022-02-26 ValidFAA registration status code V: Valid registration. All codes
N5212E Cessna
172N
Fixed-wing, single engine Individual owner
Utah
Standard 2022-02-26 ValidFAA registration status code V: Valid registration. All codes
N6324P Ostrom Donald
AVID MAGNUM
Fixed-wing, single engine Individual owner
Wyoming
Experimental 2022-02-26 ValidFAA registration status code V: Valid registration. All codes
N79145 Cessna
172K
Fixed-wing, single engine Individual owner
South Dakota
Standard 2022-02-26 ValidFAA registration status code V: Valid registration. All codes
N8365V Champion
7GCBC
Fixed-wing, single engine Individual owner
Alaska
Standard 2022-02-26 ValidFAA registration status code V: Valid registration. All codes
N4453Z Piper
PA-18-150
Fixed-wing, single engine Individual owner
Washington
Multiple 2022-02-25 ValidFAA registration status code V: Valid registration. All codes
N61EF Forisch Edward
BUSHBY MUSTANG M II
Fixed-wing, single engine Mission Aviation Resources LLC
Keystone Heights, Florida
Experimental 2022-02-25 ValidFAA registration status code V: Valid registration. All codes
N6450W Piper
PA-28-140
Fixed-wing, single engine Individual owner
Colorado
Standard 2022-02-25 ValidFAA registration status code V: Valid registration. All codes
N812ST Piper
PA-22-160
Fixed-wing, single engine Ak8 Assets LLC
Talkeetna, Alaska
Standard 2022-02-25 ValidFAA registration status code V: Valid registration. All codes
N84338 Cessna
172K
Fixed-wing, single engine Jrh Wings LLC
Alva, Oklahoma
Standard 2022-02-25 ValidFAA registration status code V: Valid registration. All codes
N9140D Piper
PA-18A 150
Fixed-wing, single engine Individual owner
Alaska
Multiple 2022-02-25 ValidFAA registration status code V: Valid registration. All codes
N172FG Cessna
172N
Fixed-wing, single engine Fly 172N LLC
Peoria, Arizona
Standard 2022-02-24 ValidFAA registration status code V: Valid registration. All codes
N21747 Cessna
172M
Fixed-wing, single engine N21747 Lc
Wichita, Kansas
Standard 2022-02-24 ValidFAA registration status code V: Valid registration. All codes
N3866Z Piper
PA-18-150
Fixed-wing, single engine Forestry Aero LLC
Norwood, Louisiana
Multiple 2022-02-24 ValidFAA registration status code V: Valid registration. All codes
N555DC Piper
PA-23-160
Fixed-wing, multi-engine Individual owner
Georgia
Standard 2022-02-24 ValidFAA registration status code V: Valid registration. All codes
N57519 Bellanca
7GCBC
Fixed-wing, single engine L & L Flying INC
Glen Allan, Mississippi
Standard 2022-02-24 ValidFAA registration status code V: Valid registration. All codes
N799L American Champion Aircraft
7GCAA
Fixed-wing, single engine Individual owner
Massachusetts
Standard 2022-02-24 ValidFAA registration status code V: Valid registration. All codes
N9279D Piper
PA-18A
Fixed-wing, single engine Acw Aviation LLC
Hines, Oregon
Standard 2022-02-24 ValidFAA registration status code V: Valid registration. All codes
N9295D Piper
PA-18A 150
Fixed-wing, single engine Individual owner
Alaska
Standard 2022-02-24 ValidFAA registration status code V: Valid registration. All codes
N5546W Piper
PA-28-160
Fixed-wing, single engine Third Step 4 LLC
Gilbert, Arizona
Standard 2022-02-23 ValidFAA registration status code V: Valid registration. All codes
N741L Merrimam Lawrence O
LANCAIR 320
Fixed-wing, single engine Co-owned owner
California
Experimental 2022-02-23 ValidFAA registration status code V: Valid registration. All codes
N7522D Piper
PA-22-150
Fixed-wing, single engine Individual owner
Idaho
Standard 2022-02-23 ValidFAA registration status code V: Valid registration. All codes
N9919U Grumman American Avn. Corp.
AA-5A
Fixed-wing, single engine Individual owner
Maryland
Standard 2022-02-23 ValidFAA registration status code V: Valid registration. All codes
N6515W Piper
PA-28-140
Fixed-wing, single engine Individual owner
Indiana
Standard 2022-02-22 ValidFAA registration status code V: Valid registration. All codes
N762AM Marshall Allan W
RV-6A
Fixed-wing, single engine Individual owner
Texas
Experimental 2022-02-22 ValidFAA registration status code V: Valid registration. All codes
N19VT Piper
PA-28-160
Fixed-wing, single engine Individual owner
North Carolina
Standard 2022-02-19 ValidFAA registration status code V: Valid registration. All codes
N225MH Cessna
172M
Fixed-wing, single engine Co-owned owner
New York
Standard 2022-02-19 ValidFAA registration status code V: Valid registration. All codes
N4202Z Piper
PA-18-150
Fixed-wing, single engine Individual owner
Alaska
Standard 2022-02-19 ValidFAA registration status code V: Valid registration. All codes
N47ST Sturgis John Michael
RV-4
Fixed-wing, single engine Individual owner
North Carolina
Experimental 2022-02-19 ValidFAA registration status code V: Valid registration. All codes
N68HK Knepper Harold P
RV6A
Fixed-wing, single engine Individual owner
Washington
Experimental 2022-02-19 ValidFAA registration status code V: Valid registration. All codes
N734DK Cessna
172N
Fixed-wing, single engine Individual owner
Texas
Standard 2022-02-19 ValidFAA registration status code V: Valid registration. All codes
N82508 Piper
PA-18-150
Fixed-wing, single engine Individual owner
Alaska
Multiple 2022-02-19 ValidFAA registration status code V: Valid registration. All codes
N90EN Piper
PA-28-160
Fixed-wing, single engine Individual owner
Georgia
Standard 2022-02-19 ValidFAA registration status code V: Valid registration. All codes
N15402 Piper
PA-28-140
Fixed-wing, single engine Swaz Aviation LLC
Queen Creek, Arizona
Standard 2022-02-18 ValidFAA registration status code V: Valid registration. All codes
N19916 Cessna
172M
Fixed-wing, single engine Individual owner
North Carolina
Standard 2022-02-18 ValidFAA registration status code V: Valid registration. All codes
N227TH Hawkins Thomas A
GLASAIR SH2 FT
Fixed-wing, single engine Individual owner
Pennsylvania
Experimental 2022-02-18 ValidFAA registration status code V: Valid registration. All codes
N6919B Piper
PA-22-150
Fixed-wing, single engine Polyclinics.Net LLC
Hixson, Tennessee
Standard 2022-02-18 ValidFAA registration status code V: Valid registration. All codes
N8259N Piper
PA-28-140
Fixed-wing, single engine Individual owner
South Dakota
Standard 2022-02-18 ValidFAA registration status code V: Valid registration. All codes
N9626C Piper
PA-28-161
Fixed-wing, single engine Executive Flight Training & Services LLC
Sanford, North Carolina
Standard 2022-02-18 ValidFAA registration status code V: Valid registration. All codes
N109FR Cessna
172P
Fixed-wing, single engine Individual owner
Arizona
Standard 2022-02-17 ValidFAA registration status code V: Valid registration. All codes
N16RN Nixon Robert R
RV-6
Fixed-wing, single engine Individual owner
Colorado
Experimental 2022-02-17 ValidFAA registration status code V: Valid registration. All codes
N313DC Piper
PA-28-161
Fixed-wing, single engine Withheld at owner's request
Standard 2022-02-17 ValidFAA registration status code V: Valid registration. All codes
N5139Y Piper
PA-18-150
Fixed-wing, single engine B & B Equipment INC
Cantwell, Alaska
Restricted 2022-02-17 ValidFAA registration status code V: Valid registration. All codes
N80135 Cessna
172M
Fixed-wing, single engine Adventure North Flying Service INC
Aitkin, Minnesota
Standard 2022-02-17 ValidFAA registration status code V: Valid registration. All codes
N8365Z Piper
PA-28-161
Fixed-wing, single engine Co-owned owner
Massachusetts
Standard 2022-02-17 ValidFAA registration status code V: Valid registration. All codes
N912YA Cessna
172M
Fixed-wing, single engine Chewelah Flyers
Chewelah, Washington
Standard 2022-02-17 ValidFAA registration status code V: Valid registration. All codes
N13479 Cessna
172M
Fixed-wing, single engine Hendricks Field Aviation LLC
Sebring, Florida
Standard 2022-02-16 ValidFAA registration status code V: Valid registration. All codes
N2376 Robinson Helicopter
R22 BETA
Helicopter Individual owner
Alaska
Standard 2022-02-16 ValidFAA registration status code V: Valid registration. All codes
N3321T Cessna
177
Fixed-wing, single engine Individual owner
Alabama
Standard 2022-02-16 ValidFAA registration status code V: Valid registration. All codes
N3685Z Piper
PA-18-150
Fixed-wing, single engine Co-owned owner
Alaska
Standard 2022-02-16 ValidFAA registration status code V: Valid registration. All codes
N4289J Piper
PA-28-140
Fixed-wing, single engine Individual owner
Pennsylvania
Standard 2022-02-16 ValidFAA registration status code V: Valid registration. All codes
N4531Z Piper
PA-22-108
Fixed-wing, single engine Individual owner
Montana
Standard 2022-02-16 ValidFAA registration status code V: Valid registration. All codes
N5376H Cessna
172M
Fixed-wing, single engine Individual owner
California
Standard 2022-02-16 ValidFAA registration status code V: Valid registration. All codes
N5502H Bellanca
7GCBC
Fixed-wing, single engine Sky View LLC
De Smet, South Dakota
Standard 2022-02-16 ValidFAA registration status code V: Valid registration. All codes
N6524W Piper
PA-28-140
Fixed-wing, single engine Koss Ronald P
Mckean, Pennsylvania
Standard 2022-02-16 ValidFAA registration status code V: Valid registration. All codes
N12684 Cessna
172M
Fixed-wing, single engine Alvidrez Investments LLC
Lakewood, California
Standard 2022-02-15 ValidFAA registration status code V: Valid registration. All codes
N19751 Cessna
172L
Fixed-wing, single engine Alaska Farm Tours LLC
Palmer, Alaska
Standard 2022-02-15 ValidFAA registration status code V: Valid registration. All codes
N5084R Cessna
172M
Fixed-wing, single engine Individual owner
Nevada
Standard 2022-02-15 ValidFAA registration status code V: Valid registration. All codes
N6196D Cessna
172N
Fixed-wing, single engine Jeff Air Pilot Services LLC
Shelbyville, Indiana
Standard 2022-02-15 ValidFAA registration status code V: Valid registration. All codes
N645SA Symphony Aircraft Ind Inc
SA 160
Fixed-wing, single engine Co-owned owner
Texas
Standard 2022-02-15 ValidFAA registration status code V: Valid registration. All codes
N8692D Piper
PA-18A 150
Fixed-wing, single engine Individual owner
Montana
Standard 2022-02-15 ValidFAA registration status code V: Valid registration. All codes
N4093P Piper
PA-23-160
Fixed-wing, multi-engine Co-owned owner
Florida
Standard 2022-02-14 ValidFAA registration status code V: Valid registration. All codes
N4714Y Piper
PA-18-150
Fixed-wing, single engine Co-owned owner
Alaska
Restricted 2022-02-14 ValidFAA registration status code V: Valid registration. All codes
N79144 Cessna
172K
Fixed-wing, single engine Co-owned owner
Florida
Standard 2022-02-14 ValidFAA registration status code V: Valid registration. All codes
N1565J Piper
PA-28-140
Fixed-wing, single engine Individual owner
District of Columbia
Standard 2022-02-12 ValidFAA registration status code V: Valid registration. All codes
N221WA Piper
PA-28-140
Fixed-wing, single engine 98X LLC
Caddo Mills, Texas
Standard 2022-02-12 ValidFAA registration status code V: Valid registration. All codes
N2549P Piper
PA-22-150
Fixed-wing, single engine Individual owner
Massachusetts
Standard 2022-02-12 ValidFAA registration status code V: Valid registration. All codes
N5064V Varga Aircraft Corp.
2150A
Fixed-wing, single engine Individual owner
Ohio
Standard 2022-02-12 ValidFAA registration status code V: Valid registration. All codes
N5391H Cessna
172M
Fixed-wing, single engine Co-owned owner
Indiana
Standard 2022-02-12 ValidFAA registration status code V: Valid registration. All codes
N699DM American Champion Aircraft
7GCAA
Fixed-wing, single engine Individual owner
Alabama
Standard 2022-02-12 ValidFAA registration status code V: Valid registration. All codes
N734DE Cessna
172N
Fixed-wing, single engine Individual owner
Wisconsin
Standard 2022-02-12 ValidFAA registration status code V: Valid registration. All codes
N9865V Cessna
172M
Fixed-wing, single engine Pierce Aero LLC
Moore, South Carolina
Standard 2022-02-12 ValidFAA registration status code V: Valid registration. All codes
N111BN Nolen William R
RV-6
Fixed-wing, single engine Individual owner
Texas
Experimental 2022-02-11 ValidFAA registration status code V: Valid registration. All codes
N15GW Cessna
172K
Fixed-wing, single engine Flight Brothers LLC
Sachse, Texas
Standard 2022-02-10 ValidFAA registration status code V: Valid registration. All codes
N4667R Piper
PA-28-140
Fixed-wing, single engine Individual owner
Alabama
Standard 2022-02-10 ValidFAA registration status code V: Valid registration. All codes
N16409 Piper
PA-28-140
Fixed-wing, single engine Individual owner
Texas
Standard 2022-02-09 ValidFAA registration status code V: Valid registration. All codes
N177RV Dibernardino Alfred F
RV-6A
Fixed-wing, single engine Argosy Services LLC
East Helena, Montana
Experimental 2022-02-09 ValidFAA registration status code V: Valid registration. All codes
N331RD Dudley Richard H
VANS RV-6A
Fixed-wing, single engine Individual owner
Wisconsin
Experimental 2022-02-09 ValidFAA registration status code V: Valid registration. All codes
N5863U Piper
PA-28-140
Fixed-wing, single engine Individual owner
Washington
Standard 2022-02-09 ValidFAA registration status code V: Valid registration. All codes
N196MM Irvine Arthur E
MM 1
Fixed-wing, single engine Individual owner
Iowa
Experimental 2022-02-08 ValidFAA registration status code V: Valid registration. All codes
N67PL Piper
PA-28-140
Fixed-wing, single engine Sky Point Aviation LLC
Sugar Land, Texas
Standard 2022-02-08 ValidFAA registration status code V: Valid registration. All codes
N715RB Piper
PA-18-150
Fixed-wing, single engine First Love LLC
Sterling, Alaska
Experimental 2022-02-08 ValidFAA registration status code V: Valid registration. All codes
N3226N Fessenden Alfred
EXPERMENTAL RV-4
Fixed-wing, single engine Individual owner
Minnesota
Experimental 2022-02-07 ValidFAA registration status code V: Valid registration. All codes
N3575Z Piper
PA-18-150
Fixed-wing, single engine Individual owner
Montana
Multiple 2022-02-07 ValidFAA registration status code V: Valid registration. All codes
N80185 Cessna
172M
Fixed-wing, single engine Aviation Training INC
Cameron Park, California
Standard 2022-02-07 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.