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
N45KT Campbell Harold A Jr
HAC 1
Fixed-wing, single engine Big Squirrelly LLC
Kalispell, Montana
Experimental 2024-04-17 ValidFAA registration status code V: Valid registration. All codes
N6329W Piper
PA-28-140
Fixed-wing, single engine Co-owned owner
Missouri
Standard 2024-04-17 ValidFAA registration status code V: Valid registration. All codes
N64046 Cessna
172M
Fixed-wing, single engine Individual owner
North Carolina
Standard 2024-04-17 ValidFAA registration status code V: Valid registration. All codes
N734QF Cessna
172N
Fixed-wing, single engine Power Play Leasing LLC
Stuart, Florida
Standard 2024-04-17 ValidFAA registration status code V: Valid registration. All codes
N734VX Cessna
172N
Fixed-wing, single engine Red Door Aviation LLC
Dover, Delaware
Standard 2024-04-17 ValidFAA registration status code V: Valid registration. All codes
N8788D Piper
PA-18-150
Fixed-wing, single engine Individual owner
Nebraska
Standard 2024-04-17 ValidFAA registration status code V: Valid registration. All codes
N1088U Cessna
172M
Fixed-wing, single engine Co-owned owner
Wyoming
Standard 2024-04-16 ValidFAA registration status code V: Valid registration. All codes
N3804Q Cessna
172L
Fixed-wing, single engine Wings Over Texas Holdings LLC
Denton, Texas
Standard 2024-04-16 ValidFAA registration status code V: Valid registration. All codes
N46704 Cessna
172K
Fixed-wing, single engine Individual owner
Florida
Standard 2024-04-16 ValidFAA registration status code V: Valid registration. All codes
N4757Y Piper
PA-18-150
Fixed-wing, single engine Lake Country Lodge
Port Alsworth, Alaska
Standard 2024-04-16 ValidFAA registration status code V: Valid registration. All codes
N7355J Piper
PA-28-140
Fixed-wing, single engine Czyszczon Aviation LLC
St Pete Beach, Florida
Standard 2024-04-16 ValidFAA registration status code V: Valid registration. All codes
N77GA American Champion Aircraft
7GCAA
Fixed-wing, single engine Individual owner
Texas
Standard 2024-04-16 ValidFAA registration status code V: Valid registration. All codes
N84840 Cessna
172K
Fixed-wing, single engine Individual owner
Washington
Standard 2024-04-16 ValidFAA registration status code V: Valid registration. All codes
N961SS Smith Richard W
SUPER SPORTSMAN
Fixed-wing, single engine Individual owner
Alaska
Experimental 2024-04-16 ValidFAA registration status code V: Valid registration. All codes
N165FT Piper
PA-28-161
Fixed-wing, single engine Paris Air INC
Vero Beach, Florida
Standard 2024-04-15 ValidFAA registration status code V: Valid registration. All codes
N3867Q Cessna
172L
Fixed-wing, single engine Individual owner
Kansas
Standard 2024-04-15 ValidFAA registration status code V: Valid registration. All codes
N3932Q Cessna
172L
Fixed-wing, single engine Individual owner
Washington
Standard 2024-04-15 ValidFAA registration status code V: Valid registration. All codes
N5544W Piper
PA-28-150
Fixed-wing, single engine Individual owner
Minnesota
Standard 2024-04-15 ValidFAA registration status code V: Valid registration. All codes
N75MM Bellanca
7GCBC
Fixed-wing, single engine Individual owner
South Dakota
Standard 2024-04-15 ValidFAA registration status code V: Valid registration. All codes
N7779D Piper
PA-18A 150
Fixed-wing, single engine Individual owner
Wisconsin
Standard 2024-04-15 ValidFAA registration status code V: Valid registration. All codes
N7850D Piper
PA-22-150
Fixed-wing, single engine Individual owner
Alaska
Standard 2024-04-15 ValidFAA registration status code V: Valid registration. All codes
N8722D Piper
PA-22-160
Fixed-wing, single engine Co-owned owner
Arizona
Standard 2024-04-15 ValidFAA registration status code V: Valid registration. All codes
N3329P Piper
PA-23-160
Fixed-wing, multi-engine Co-owned owner
Montana
Standard 2024-04-14 ValidFAA registration status code V: Valid registration. All codes
N64256 Cessna
172M
Fixed-wing, single engine Dc Aero LLC
Ramona, California
Standard 2024-04-14 ValidFAA registration status code V: Valid registration. All codes
N83113 Piper
PA-28-161
Fixed-wing, single engine N83113 LLC
Liberty, North Carolina
Experimental 2024-04-14 ValidFAA registration status code V: Valid registration. All codes
N926RU Smith Ronald A
RV-6A
Fixed-wing, single engine Individual owner
Oregon
Experimental 2024-04-14 ValidFAA registration status code V: Valid registration. All codes
N9880W Piper
PA-28-140
Fixed-wing, single engine Individual owner
Kansas
Standard 2024-04-14 ValidFAA registration status code V: Valid registration. All codes
N9886W Piper
PA-28-140
Fixed-wing, single engine Individual owner
Texas
Standard 2024-04-14 ValidFAA registration status code V: Valid registration. All codes
N35392 Cessna
172I
Fixed-wing, single engine Individual owner
Indiana
Standard 2024-04-13 ValidFAA registration status code V: Valid registration. All codes
N4115X Aero Commander
100
Fixed-wing, single engine Centerline Aero LLC
Kalispell, Montana
Standard 2024-04-13 ValidFAA registration status code V: Valid registration. All codes
N595BS Switzer Robert W
RV-4
Fixed-wing, single engine Individual owner
Illinois
Experimental 2024-04-13 ValidFAA registration status code V: Valid registration. All codes
N7221J Piper
PA-28-140
Fixed-wing, single engine Co-owned owner
North Carolina
Standard 2024-04-13 ValidFAA registration status code V: Valid registration. All codes
N9532W Piper
PA-28-140
Fixed-wing, single engine Co-owned owner
Missouri
Standard 2024-04-13 ValidFAA registration status code V: Valid registration. All codes
N96493 Cessna
172P
Fixed-wing, single engine Smtm Holdings INC
Wilmington, Delaware
Standard 2024-04-13 ValidFAA registration status code V: Valid registration. All codes
N13365 Cessna
172M
Fixed-wing, single engine Pacific Flight Academy LLC
Honolulu, Hawaii
Standard 2024-04-12 ValidFAA registration status code V: Valid registration. All codes
N1794T Piper
PA-28-140
Fixed-wing, single engine Gear Up Aircraft Rental LLC
Warner Robins, Georgia
Standard 2024-04-12 ValidFAA registration status code V: Valid registration. All codes
N204SR Cessna
172M
Fixed-wing, single engine Sunrise Aero INC
Ocala, Florida
Standard 2024-04-12 ValidFAA registration status code V: Valid registration. All codes
N4104X Aero Commander
100
Fixed-wing, single engine Individual owner
Texas
Standard 2024-04-12 ValidFAA registration status code V: Valid registration. All codes
N5444H Cessna
172M
Fixed-wing, single engine Iowa Lakes Community College
Estherville, Iowa
Standard 2024-04-12 ValidFAA registration status code V: Valid registration. All codes
N5598F Piper
PA-28-140
Fixed-wing, single engine Individual owner
Wisconsin
Standard 2024-04-12 ValidFAA registration status code V: Valid registration. All codes
N6904D Piper
PA-22-150
Fixed-wing, single engine Co-owned owner
Ohio
Standard 2024-04-12 ValidFAA registration status code V: Valid registration. All codes
N760JK Fly Buys Inc
STOL CH 750
Fixed-wing, single engine Fly Buys INC
Wilmington, Delaware
Experimental 2024-04-12 ValidFAA registration status code V: Valid registration. All codes
N8537 Bellanca
7GCBC
Fixed-wing, single engine Individual owner
Iowa
Multiple 2024-04-12 ValidFAA registration status code V: Valid registration. All codes
N9830G Cessna
172L
Fixed-wing, single engine Co-owned owner
Florida
Standard 2024-04-12 ValidFAA registration status code V: Valid registration. All codes
N156XD Cessna
172N
Fixed-wing, single engine Individual owner
Maine
Standard 2024-04-11 ValidFAA registration status code V: Valid registration. All codes
N31RW Cessna
172N
Fixed-wing, single engine Spot Air LLC
Burlington, Texas
Standard 2024-04-11 ValidFAA registration status code V: Valid registration. All codes
N38265 Piper
PA-28-161
Fixed-wing, single engine Recipe System US INC
Torrance, California
Standard 2024-04-11 ValidFAA registration status code V: Valid registration. All codes
N4125Z Piper
PA-18-150
Fixed-wing, single engine Individual owner
Alaska
Multiple 2024-04-11 ValidFAA registration status code V: Valid registration. All codes
N804JS American Champion Aircraft
7GCAA
Fixed-wing, single engine Co-owned owner
Oklahoma
Standard 2024-04-11 ValidFAA registration status code V: Valid registration. All codes
N814R Cessna
172L
Fixed-wing, single engine Individual owner
Texas
Standard 2024-04-11 ValidFAA registration status code V: Valid registration. All codes
N9796V Cessna
172M
Fixed-wing, single engine Kelley Aircraft LLC
Weyers Cave, Virginia
Standard 2024-04-11 ValidFAA registration status code V: Valid registration. All codes
N9910U Grumman American Avn. Corp.
AA-5A
Fixed-wing, single engine Sky West Aviation INC Trustee
Albuquerque, New Mexico
Standard 2024-04-11 ValidFAA registration status code V: Valid registration. All codes
N172WW Cessna
172M
Fixed-wing, single engine Straight and Level Seaplanes LLC
Grand Island, Florida
Standard 2024-04-10 ValidFAA registration status code V: Valid registration. All codes
N18186 Monocoupe
90A
Fixed-wing, single engine Individual owner
Washington
Standard 2024-04-10 ValidFAA registration status code V: Valid registration. All codes
N341FA Cessna
172N
Fixed-wing, single engine Jb Aircraft LLC
Anchorage, Alaska
Standard 2024-04-10 ValidFAA registration status code V: Valid registration. All codes
N3538P Piper
PA-22-150
Fixed-wing, single engine Individual owner
Arizona
Standard 2024-04-10 ValidFAA registration status code V: Valid registration. All codes
N55EK Mengel David M
LONG-EZ
Fixed-wing, single engine Individual owner
Indiana
Experimental 2024-04-10 ValidFAA registration status code V: Valid registration. All codes
N8560D Piper
PA-22-160
Fixed-wing, single engine Individual owner
Arizona
Standard 2024-04-10 ValidFAA registration status code V: Valid registration. All codes
N9757W Piper
PA-28-140
Fixed-wing, single engine Tld and Company LLC
Trenton, Florida
Standard 2024-04-10 ValidFAA registration status code V: Valid registration. All codes
N2572A Piper
PA-20-135
Fixed-wing, single engine Individual owner
Washington
Standard 2024-04-09 ValidFAA registration status code V: Valid registration. All codes
N2621K Piper
L-21B
Fixed-wing, single engine Individual owner
Arizona
Restricted 2024-04-09 ValidFAA registration status code V: Valid registration. All codes
N3DT Piper
PA-18-150
Fixed-wing, single engine Bighorn Flying Company LLC
Wood River, Nebraska
Restricted 2024-04-09 ValidFAA registration status code V: Valid registration. All codes
N5946D Piper
PA-22-150
Fixed-wing, single engine Insite Design LLC
Indianapolis, Indiana
Standard 2024-04-09 ValidFAA registration status code V: Valid registration. All codes
N65AT Arctic Aircraft Co Inc
S-1B2
Fixed-wing, single engine Co-owned owner
Alaska
Experimental 2024-04-09 ValidFAA registration status code V: Valid registration. All codes
N7138R Piper
PA-28-140
Fixed-wing, single engine Individual owner
Tennessee
Standard 2024-04-09 ValidFAA registration status code V: Valid registration. All codes
N82783 Piper
PA-28-161
Fixed-wing, single engine Gulf Atlantic Airways INC
Gainesville, Florida
Standard 2024-04-09 ValidFAA registration status code V: Valid registration. All codes
N9522H Cessna
172M
Fixed-wing, single engine Individual owner
Illinois
Standard 2024-04-09 ValidFAA registration status code V: Valid registration. All codes
N1156E Bellanca
7GCBC
Fixed-wing, single engine Gooding Flying Club
Gooding, Idaho
Standard 2024-04-08 ValidFAA registration status code V: Valid registration. All codes
N13152 Cessna
172M
Fixed-wing, single engine Individual owner
Maine
Standard 2024-04-08 ValidFAA registration status code V: Valid registration. All codes
N1977P Piper
PA-18S-150
Fixed-wing, single engine Individual owner
Alaska
Restricted 2024-04-08 ValidFAA registration status code V: Valid registration. All codes
N211MK Maynard Bryon T
RV-6A
Fixed-wing, single engine Wk Construction LLC
Meade, Kansas
Experimental 2024-04-08 ValidFAA registration status code V: Valid registration. All codes
N407WB Piper
PA-18-150
Fixed-wing, single engine Bad Dog Aviation LLC
Wasilla, Alaska
Standard 2024-04-08 ValidFAA registration status code V: Valid registration. All codes
N447P Hartz Paul
RV-6A
Fixed-wing, single engine Individual owner
Texas
Experimental 2024-04-08 ValidFAA registration status code V: Valid registration. All codes
N7510R Piper
PA-28-140
Fixed-wing, single engine Individual owner
Mississippi
Standard 2024-04-08 ValidFAA registration status code V: Valid registration. All codes
N8331S Piper
PA-28-161
Fixed-wing, single engine Fly Aviation CORP
Wilmington, Delaware
Standard 2024-04-08 ValidFAA registration status code V: Valid registration. All codes
N84891 Cessna
172K
Fixed-wing, single engine Co-owned owner
Ohio
Standard 2024-04-08 ValidFAA registration status code V: Valid registration. All codes
N2840P Piper
PA-22-150
Fixed-wing, single engine Individual owner
Florida
Standard 2024-04-07 ValidFAA registration status code V: Valid registration. All codes
N29480 Cessna
177
Fixed-wing, single engine Cobra Aviation LLC
Kalispell, Montana
Standard 2024-04-07 ValidFAA registration status code V: Valid registration. All codes
N4361V Johnson J C/Johnson N L
RV-6A
Fixed-wing, single engine Individual owner
North Dakota
Experimental 2024-04-07 ValidFAA registration status code V: Valid registration. All codes
N87MX Jakel Helmut Leo
RV-4
Fixed-wing, single engine Individual owner
Idaho
Experimental 2024-04-07 ValidFAA registration status code V: Valid registration. All codes
N141TA Piper
PA-28-151
Fixed-wing, single engine Pray Aviation INC
Augusta, Kansas
Standard 2024-04-06 ValidFAA registration status code V: Valid registration. All codes
N3592Q Cessna
172M
Fixed-wing, single engine Central Arkansas Flying Club INC
Bryant, Arkansas
Standard 2024-04-06 ValidFAA registration status code V: Valid registration. All codes
N41669 Piper
PA-28-151
Fixed-wing, single engine Individual owner
North Carolina
Standard 2024-04-06 ValidFAA registration status code V: Valid registration. All codes
N4420Z Piper
PA-18-150
Fixed-wing, single engine Individual owner
California
Multiple 2024-04-06 ValidFAA registration status code V: Valid registration. All codes
N5066V Varga Aircraft Corp.
2150A
Fixed-wing, single engine Action Center LLC
Morgan, Utah
Standard 2024-04-06 ValidFAA registration status code V: Valid registration. All codes
N667LD Socata
TB 9 TAMPICO
Fixed-wing, single engine Leading Edge Aviation LLC
Manchester, Missouri
Standard 2024-04-06 ValidFAA registration status code V: Valid registration. All codes
N8120F Piper
PA-28-161
Fixed-wing, single engine Pray Aviation INC
Augusta, Kansas
Standard 2024-04-06 ValidFAA registration status code V: Valid registration. All codes
N8362P Piper
PA-18-150
Fixed-wing, single engine Individual owner
South Dakota
Multiple 2024-04-06 ValidFAA registration status code V: Valid registration. All codes
N859T Piper
PA-28-140
Fixed-wing, single engine Raven Aviation LLC
Lexington, Kentucky
Standard 2024-04-06 ValidFAA registration status code V: Valid registration. All codes
N9671K Piper
PA-28-151
Fixed-wing, single engine Pray Aviation INC
Augusta, Kansas
Standard 2024-04-06 ValidFAA registration status code V: Valid registration. All codes
N227MD Dalrymple Mark J
COZY
Fixed-wing, single engine Afd Solutions INC
Dekalb, Illinois
Experimental 2024-04-05 ValidFAA registration status code V: Valid registration. All codes
N5304E Cessna
172N
Fixed-wing, single engine Dornink Farms LLC
Freeport, Illinois
Standard 2024-04-05 ValidFAA registration status code V: Valid registration. All codes
N5873W Piper
PA-28-150
Fixed-wing, single engine Individual owner
West Virginia
Standard 2024-04-05 ValidFAA registration status code V: Valid registration. All codes
N8376L Piper
PA-28-161
Fixed-wing, single engine Pray Aviation INC
Augusta, Kansas
Standard 2024-04-05 ValidFAA registration status code V: Valid registration. All codes
N8900D Piper
PA-22-160
Fixed-wing, single engine Individual owner
Alaska
Standard 2024-04-05 ValidFAA registration status code V: Valid registration. All codes
N928TA Piper
PA-28-161
Fixed-wing, single engine Pray Aviation INC
Augusta, Kansas
Standard 2024-04-05 ValidFAA registration status code V: Valid registration. All codes
N144DR Reed Derek
RV-6A
Fixed-wing, single engine Individual owner
Tennessee
Experimental 2024-04-04 ValidFAA registration status code V: Valid registration. All codes
N20039 Cessna
172M
Fixed-wing, single engine Kcsi Aerial Patrol INC
Bakersfield, California
Standard 2024-04-04 ValidFAA registration status code V: Valid registration. All codes
N20648 Cessna
172M
Fixed-wing, single engine Jones Farm Fresh LLC
Bartlett, Tennessee
Standard 2024-04-04 ValidFAA registration status code V: Valid registration. All codes
N3308Z Piper
PA-22-150
Fixed-wing, single engine Individual owner
Florida
Standard 2024-04-04 ValidFAA registration status code V: Valid registration. All codes
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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.