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
N36417 Bellanca
7GCBC
Fixed-wing, single engine Individual owner
South Dakota
Standard 2022-08-10 ValidFAA registration status code V: Valid registration. All codes
N453HZ Danford Gary R
HATZ CB-1
Fixed-wing, single engine Individual owner
Wisconsin
Experimental 2022-08-10 ValidFAA registration status code V: Valid registration. All codes
N734XD Cessna
172N
Fixed-wing, single engine Individual owner
Michigan
Standard 2022-08-10 ValidFAA registration status code V: Valid registration. All codes
N79531 Cessna
172K
Fixed-wing, single engine Individual owner
California
Standard 2022-08-10 ValidFAA registration status code V: Valid registration. All codes
N8866Y Piper
PA-28-140
Fixed-wing, single engine Individual owner
New Mexico
Standard 2022-08-10 ValidFAA registration status code V: Valid registration. All codes
N13391 Cessna
172M
Fixed-wing, single engine Brazos Valley Flight Services LLC
College Station, Texas
Standard 2022-08-09 ValidFAA registration status code V: Valid registration. All codes
N172GC Cessna
172K
Fixed-wing, single engine Dairy Air INC
Wyoming, Pennsylvania
Standard 2022-08-09 ValidFAA registration status code V: Valid registration. All codes
N52FS Bellanca
7GCBC
Fixed-wing, single engine Individual owner
Minnesota
Standard 2022-08-09 ValidFAA registration status code V: Valid registration. All codes
N6823H Cessna
172M
Fixed-wing, single engine Individual owner
California
Standard 2022-08-09 ValidFAA registration status code V: Valid registration. All codes
N3914Q Cessna
172L
Fixed-wing, single engine American Patrol INC
Midland, Texas
Standard 2022-08-08 ValidFAA registration status code V: Valid registration. All codes
N57412 Bellanca
7GCBC
Fixed-wing, single engine North County Flight Training INC
Carlsbad, California
Standard 2022-08-08 ValidFAA registration status code V: Valid registration. All codes
N6517D Cessna
172N
Fixed-wing, single engine Individual owner
Illinois
Standard 2022-08-08 ValidFAA registration status code V: Valid registration. All codes
N722FL Piper
PA-28-140
Fixed-wing, single engine Individual owner
New Hampshire
Standard 2022-08-08 ValidFAA registration status code V: Valid registration. All codes
N78441 Cessna
172K
Fixed-wing, single engine 444.Com LLC
Wilmington, Delaware
Standard 2022-08-08 ValidFAA registration status code V: Valid registration. All codes
N93WP Piper
PA-28-140
Fixed-wing, single engine Hbfc INC
Tehachapi, California
Standard 2022-08-08 ValidFAA registration status code V: Valid registration. All codes
N494FL Piper
PA-28-140
Fixed-wing, single engine Williams Mark J
Ojai, California
Standard 2022-08-06 ValidFAA registration status code V: Valid registration. All codes
N5144W Piper
PA-28
Fixed-wing, single engine Hub City Aviation Academy LLC
Lubbock, Texas
Standard 2022-08-06 ValidFAA registration status code V: Valid registration. All codes
N5569W Piper
PA-28-160
Fixed-wing, single engine Co-owned owner
New Mexico
Standard 2022-08-06 ValidFAA registration status code V: Valid registration. All codes
N5878W Piper
PA-28-150
Fixed-wing, single engine Individual owner
Kentucky
Standard 2022-08-06 ValidFAA registration status code V: Valid registration. All codes
N6852H Cessna
172M
Fixed-wing, single engine Individual owner
Utah
Standard 2022-08-06 ValidFAA registration status code V: Valid registration. All codes
N6861W Piper
PA-28-140
Fixed-wing, single engine Individual owner
California
Standard 2022-08-06 ValidFAA registration status code V: Valid registration. All codes
N73172 Cessna
172M
Fixed-wing, single engine American Patrols INC
Midland, Texas
Standard 2022-08-06 ValidFAA registration status code V: Valid registration. All codes
N7431D Piper
PA-22-150
Fixed-wing, single engine Individual owner
Alaska
Standard 2022-08-06 ValidFAA registration status code V: Valid registration. All codes
N83038 Piper
PA-28-161
Fixed-wing, single engine Zimin Transportation LLC
South Naknek, Alaska
Standard 2022-08-06 ValidFAA registration status code V: Valid registration. All codes
N831AK Voss Albert
GLASAIR I
Fixed-wing, single engine Individual owner
Michigan
Experimental 2022-08-06 ValidFAA registration status code V: Valid registration. All codes
N92704 Cessna
172M
Fixed-wing, single engine Individual owner
North Carolina
Standard 2022-08-06 ValidFAA registration status code V: Valid registration. All codes
N2396Z Beech
23
Fixed-wing, single engine Individual owner
Kentucky
Standard 2022-08-05 ValidFAA registration status code V: Valid registration. All codes
N26718 Gulfstream American Corp
AA-5A
Fixed-wing, single engine Co-owned owner
Oklahoma
Standard 2022-08-05 ValidFAA registration status code V: Valid registration. All codes
N311HB Cessna
172N
Fixed-wing, single engine Christiansen Aviation LLC
Wilmington, Delaware
Standard 2022-08-05 ValidFAA registration status code V: Valid registration. All codes
N52279 Cessna
172P
Fixed-wing, single engine Co-owned owner
Texas
Standard 2022-08-05 ValidFAA registration status code V: Valid registration. All codes
N6507C Piper
PA-28-161
Fixed-wing, single engine Individual owner
Maryland
Standard 2022-08-05 ValidFAA registration status code V: Valid registration. All codes
N727AJ Piper
PA-28-140
Fixed-wing, single engine Individual owner
Ohio
Standard 2022-08-05 ValidFAA registration status code V: Valid registration. All codes
N80454 Cessna
172M
Fixed-wing, single engine Tadao LLC
Tucson, Arizona
Standard 2022-08-05 ValidFAA registration status code V: Valid registration. All codes
N8RR Bellanca
7GCBC
Fixed-wing, single engine Co-owned owner
California
Standard 2022-08-05 ValidFAA registration status code V: Valid registration. All codes
N2391Y Cessna
177
Fixed-wing, single engine Individual owner
New York
Standard 2022-08-04 ValidFAA registration status code V: Valid registration. All codes
N26872 Gulfstream American Corp
AA-5A
Fixed-wing, single engine Hughes Tool & Die LLC
Norfolk, Virginia
Standard 2022-08-04 ValidFAA registration status code V: Valid registration. All codes
N41510 Maule
MX-7-160
Fixed-wing, single engine Clemente Motor INC
Wilmington, Delaware
Standard 2022-08-04 ValidFAA registration status code V: Valid registration. All codes
N7062G Cessna
172K
Fixed-wing, single engine Northwoods Aviation LLC
Eagle River, Wisconsin
Standard 2022-08-04 ValidFAA registration status code V: Valid registration. All codes
N75744 Cessna
172N
Fixed-wing, single engine Blue River Aviation LLC
Palmer, Alaska
Standard 2022-08-04 ValidFAA registration status code V: Valid registration. All codes
N913LK Richard W Witt
AVID MAGNUM
Fixed-wing, single engine Co-owned owner
Oregon
Experimental 2022-08-04 ValidFAA registration status code V: Valid registration. All codes
N13HA Anderson Howard Herbert
RV-4
Fixed-wing, single engine Individual owner
Florida
Experimental 2022-08-03 ValidFAA registration status code V: Valid registration. All codes
N1755P Piper
PA-18-150
Fixed-wing, single engine Individual owner
Alaska
Standard 2022-08-03 ValidFAA registration status code V: Valid registration. All codes
N2937P Piper
PA-22-150
Fixed-wing, single engine Individual owner
Alaska
Standard 2022-08-03 ValidFAA registration status code V: Valid registration. All codes
N4360J Piper
PA-28-140
Fixed-wing, single engine Individual owner
Utah
Standard 2022-08-03 ValidFAA registration status code V: Valid registration. All codes
N733HT Cessna
172N
Fixed-wing, single engine Brazos Valley Flight Services LLC
College Station, Texas
Standard 2022-08-03 ValidFAA registration status code V: Valid registration. All codes
N21841 Cessna
172M
Fixed-wing, single engine Individual owner
Arizona
Standard 2022-08-02 ValidFAA registration status code V: Valid registration. All codes
N421PT Thomas Fitzgerald P
VANS AIRCRAFT RV-6A
Fixed-wing, single engine Co-owned owner
Oklahoma
Experimental 2022-08-02 ValidFAA registration status code V: Valid registration. All codes
N4301J Piper
PA-28-140
Fixed-wing, single engine Individual owner
New York
Standard 2022-08-02 ValidFAA registration status code V: Valid registration. All codes
N73605 Cessna
172M
Fixed-wing, single engine Jkg LLC
Murfreesboro, Tennessee
Multiple 2022-08-02 ValidFAA registration status code V: Valid registration. All codes
N75615 Cessna
172N
Fixed-wing, single engine Star Av8R LLC
Austell, Georgia
Standard 2022-08-02 ValidFAA registration status code V: Valid registration. All codes
N8640V Bellanca
7GCBC
Fixed-wing, single engine Co-owned owner
Nebraska
Standard 2022-08-02 ValidFAA registration status code V: Valid registration. All codes
N9596H Cessna
172M
Fixed-wing, single engine Co-owned owner
California
Standard 2022-08-02 ValidFAA registration status code V: Valid registration. All codes
N3115 Eaa Biplane
P
Fixed-wing, single engine Bravo Charlie LLC
Johnston, Iowa
Experimental 2022-08-01 ValidFAA registration status code V: Valid registration. All codes
N444PP Cessna
172K
Fixed-wing, single engine Individual owner
Texas
Restricted 2022-08-01 ValidFAA registration status code V: Valid registration. All codes
N648SA Symphony Aircraft Ind Inc
SA 160
Fixed-wing, single engine Four Delta Tango LLC
Wilmington, Delaware
Standard 2022-08-01 ValidFAA registration status code V: Valid registration. All codes
N775TA Piper
PA-28-151
Fixed-wing, single engine Individual owner
Illinois
Standard 2022-08-01 ValidFAA registration status code V: Valid registration. All codes
N9091D Piper
PA-18-150
Fixed-wing, single engine Individual owner
Alaska
Restricted 2022-08-01 ValidFAA registration status code V: Valid registration. All codes
N953DY Grumman American Avn. Corp.
AA-5A
Fixed-wing, single engine Individual owner
Oregon
Standard 2022-08-01 ValidFAA registration status code V: Valid registration. All codes
N7541R Piper
PA-28-140
Fixed-wing, single engine Individual owner
Tennessee
Standard 2022-07-31 ValidFAA registration status code V: Valid registration. All codes
N150ND Socata
TB 9 TAMPICO
Fixed-wing, single engine Clear Skies Avionics INC
Clearwater, Florida
Standard 2022-07-30 ValidFAA registration status code V: Valid registration. All codes
N20018 Cessna
172M
Fixed-wing, single engine Aerofeather Aviation INC
Suffolk, Virginia
Standard 2022-07-30 ValidFAA registration status code V: Valid registration. All codes
N20MU Cessna
172N
Fixed-wing, single engine Oracle Aviation LLC
Omaha, Nebraska
Standard 2022-07-30 ValidFAA registration status code V: Valid registration. All codes
N4276J Piper
PA-28-140
Fixed-wing, single engine Individual owner
Florida
Standard 2022-07-30 ValidFAA registration status code V: Valid registration. All codes
N5462L Grumman American Avn. Corp.
AA-5
Fixed-wing, single engine Individual owner
Maine
Standard 2022-07-30 ValidFAA registration status code V: Valid registration. All codes
N7053G Cessna
172K
Fixed-wing, single engine Spare Change Enterprises LLC
Atlantic, Iowa
Standard 2022-07-30 ValidFAA registration status code V: Valid registration. All codes
N8275J Varga Aircraft Corp.
2150A
Fixed-wing, single engine Flabob Airport LLC
Riverside, California
Standard 2022-07-30 ValidFAA registration status code V: Valid registration. All codes
N87621 Monocoupe
90AL-115
Fixed-wing, single engine Individual owner
Florida
Standard 2022-07-30 ValidFAA registration status code V: Valid registration. All codes
N9366H Cessna
172M
Fixed-wing, single engine Individual owner
Arkansas
Standard 2022-07-30 ValidFAA registration status code V: Valid registration. All codes
N916AV Cessna
172N
Fixed-wing, single engine Individual owner
Texas
Standard 2022-07-29 ValidFAA registration status code V: Valid registration. All codes
N2926T Aero Commander
100
Fixed-wing, single engine R and L Aero LLC
Dyersburg, Tennessee
Standard 2022-07-28 ValidFAA registration status code V: Valid registration. All codes
N3287Q Piper
PA-28-140
Fixed-wing, single engine Jase Aircraft Leasing LLC
Lenexa, Kansas
Standard 2022-07-28 ValidFAA registration status code V: Valid registration. All codes
N392EC Edmond Compton
BEARHAWK 4-2
Fixed-wing, single engine Individual owner
Virginia
Experimental 2022-07-28 ValidFAA registration status code V: Valid registration. All codes
N4561X Piper
PA-28-140
Fixed-wing, single engine Air Bhnb LLC
Statesboro, Georgia
Standard 2022-07-28 ValidFAA registration status code V: Valid registration. All codes
N6140W Piper
PA-28-140
Fixed-wing, single engine Individual owner
Michigan
Standard 2022-07-28 ValidFAA registration status code V: Valid registration. All codes
N64493 Cessna
172P
Fixed-wing, single engine Neron II LLC
Lewes, Delaware
Standard 2022-07-28 ValidFAA registration status code V: Valid registration. All codes
N739KF Cessna
172N
Fixed-wing, single engine Five Two Investments LLC
Oconomowoc, Wisconsin
Standard 2022-07-28 ValidFAA registration status code V: Valid registration. All codes
N7569G Cessna
172L
Fixed-wing, single engine Airborne LLC
Wilmington, Delaware
Standard 2022-07-28 ValidFAA registration status code V: Valid registration. All codes
N75845 Cessna
172N
Fixed-wing, single engine Individual owner
Wisconsin
Standard 2022-07-28 ValidFAA registration status code V: Valid registration. All codes
N9702U Grumman American Avn. Corp.
AA-5A
Fixed-wing, single engine Individual owner
Colorado
Standard 2022-07-28 ValidFAA registration status code V: Valid registration. All codes
N75JW Wayne John K
PITTS SPECIAL S-1
Fixed-wing, single engine Individual owner
Virginia
Experimental 2022-07-27 ValidFAA registration status code V: Valid registration. All codes
N78221 Cessna
172K
Fixed-wing, single engine Individual owner
Illinois
Standard 2022-07-27 ValidFAA registration status code V: Valid registration. All codes
N9051F Piper
PA-18
Fixed-wing, single engine Individual owner
California
Multiple 2022-07-27 ValidFAA registration status code V: Valid registration. All codes
N951KC Robinson Helicopter
R22 BETA
Helicopter N951Kc LLC
Rehoboth Beach, Delaware
Standard 2022-07-27 ValidFAA registration status code V: Valid registration. All codes
N2651Z Bellanca
7GCBC
Fixed-wing, single engine Individual owner
Montana
Standard 2022-07-26 ValidFAA registration status code V: Valid registration. All codes
N678JW Piper
PA-28-161
Fixed-wing, single engine Individual owner
Iowa
Standard 2022-07-26 ValidFAA registration status code V: Valid registration. All codes
N7872G Cessna
172L
Fixed-wing, single engine American Classic Flying Club LLC
Waterville, Maine
Standard 2022-07-26 ValidFAA registration status code V: Valid registration. All codes
N3986X Piper
PA-28-151
Fixed-wing, single engine Individual owner
Missouri
Standard 2022-07-25 ValidFAA registration status code V: Valid registration. All codes
N5365Q Cessna
172M
Fixed-wing, single engine Individual owner
North Carolina
Standard 2022-07-25 ValidFAA registration status code V: Valid registration. All codes
N200MB Bellanca
7GCBC
Fixed-wing, single engine Purple Plane LLC
Granbury, Texas
Standard 2022-07-23 ValidFAA registration status code V: Valid registration. All codes
N3293V Gray David M
COZY
Fixed-wing, single engine Individual owner
Minnesota
Experimental 2022-07-23 ValidFAA registration status code V: Valid registration. All codes
N5221R Cessna
172M
Fixed-wing, single engine Individual owner
Washington
Standard 2022-07-23 ValidFAA registration status code V: Valid registration. All codes
N53977 Bellanca
7GCBC
Fixed-wing, single engine Co-owned owner
Alaska
Standard 2022-07-23 ValidFAA registration status code V: Valid registration. All codes
N56996 Piper
PA-28-140
Fixed-wing, single engine Individual owner
Minnesota
Standard 2022-07-23 ValidFAA registration status code V: Valid registration. All codes
N6412D Cessna
172N
Fixed-wing, single engine Port Aero Club INC
Gold River, California
Standard 2022-07-23 ValidFAA registration status code V: Valid registration. All codes
N91246 Piper
PA-18-150
Fixed-wing, single engine Individual owner
Texas
Standard 2022-07-23 ValidFAA registration status code V: Valid registration. All codes
N9805W Piper
PA-28-140
Fixed-wing, single engine Individual owner
Florida
Standard 2022-07-23 ValidFAA registration status code V: Valid registration. All codes
N54947 Cessna
172P
Fixed-wing, single engine Christiansen Aviation LLC
Wilmington, Delaware
Standard 2022-07-22 ValidFAA registration status code V: Valid registration. All codes
N121CR Heisdorffer Roger
GLASAIR
Fixed-wing, single engine Individual owner
Arizona
Experimental 2022-07-21 ValidFAA registration status code V: Valid registration. All codes
N131FR Cessna
172P
Fixed-wing, single engine Optic Air LLC
Sioux Center, Iowa
Standard 2022-07-21 ValidFAA registration status code V: Valid registration. All codes
N64129 Cessna
172P
Fixed-wing, single engine Atlanta Aviation Academy INC
Lawrenceville, Georgia
Standard 2022-07-21 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.