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
N54781 Cessna
172P
Fixed-wing, single engine Kingsky Flight Academy LLC
Lakeland, Florida
Standard 2019-09-16 ValidFAA registration status code V: Valid registration. All codes
N79549 Cessna
172K
Fixed-wing, single engine Triad Aviation Academy LLC
Greensboro, North Carolina
Standard 2019-09-16 ValidFAA registration status code V: Valid registration. All codes
N5237T Piper
PA-28-140
Fixed-wing, single engine Co-owned owner
Florida
Standard 2019-09-14 ValidFAA registration status code V: Valid registration. All codes
N556PS Carter David R
CHRISTAVIA MK4
Fixed-wing, single engine Individual owner
Oregon
Experimental 2019-09-14 ValidFAA registration status code V: Valid registration. All codes
N95238 Piper
PA-28-140
Fixed-wing, single engine Individual owner
Washington
Standard 2019-09-14 ValidFAA registration status code V: Valid registration. All codes
N521RL Robinson Helicopter
R22
Helicopter Cherry Creek School District No 5
Greenwood Village, Colorado
Standard 2019-09-13 ValidFAA registration status code V: Valid registration. All codes
N5734U Piper
PA-28-140
Fixed-wing, single engine Individual owner
Kansas
Standard 2019-09-13 ValidFAA registration status code V: Valid registration. All codes
N6149J Piper
PA-28-151
Fixed-wing, single engine Aeroventures Flying Club INC
Lilburn, Georgia
Standard 2019-09-13 ValidFAA registration status code V: Valid registration. All codes
N7091G Cessna
172K
Fixed-wing, single engine Skylark Flight Training LLC
Wilmington, Delaware
Standard 2019-09-13 ValidFAA registration status code V: Valid registration. All codes
N12MP Piper
PA-30
Fixed-wing, multi-engine Individual owner
Texas
Standard 2019-09-12 ValidFAA registration status code V: Valid registration. All codes
N172FX Cessna
172N
Fixed-wing, single engine Flexjet LLC
Cleveland, Ohio
Standard 2019-09-12 ValidFAA registration status code V: Valid registration. All codes
N21123 Piper
PA-28-161
Fixed-wing, single engine Paris Air INC
Vero Beach, Florida
Standard 2019-09-12 ValidFAA registration status code V: Valid registration. All codes
N46640 Cessna
172K
Fixed-wing, single engine Individual owner
Virginia
Standard 2019-09-12 ValidFAA registration status code V: Valid registration. All codes
N5768F Piper
PA-28-140
Fixed-wing, single engine Collum Aviation LLC
Milton, Florida
Standard 2019-09-12 ValidFAA registration status code V: Valid registration. All codes
N64199 Cessna
172M
Fixed-wing, single engine Individual owner
Colorado
Standard 2019-09-12 ValidFAA registration status code V: Valid registration. All codes
N7303J Piper
PA-28-140
Fixed-wing, single engine Individual owner
Michigan
Standard 2019-09-12 ValidFAA registration status code V: Valid registration. All codes
N75714 Cessna
172N
Fixed-wing, single engine Lincoln Skyways INC
Lincoln, California
Standard 2019-09-12 ValidFAA registration status code V: Valid registration. All codes
N8262N Piper
PA-28-140
Fixed-wing, single engine 40 Flight LLC
Fernandina Beach, Florida
Standard 2019-09-12 ValidFAA registration status code V: Valid registration. All codes
N8513D Piper
PA-22-160
Fixed-wing, single engine Individual owner
Tennessee
Standard 2019-09-12 ValidFAA registration status code V: Valid registration. All codes
N116FL Piper
PA-18-150
Fixed-wing, single engine Individual owner
Texas
Standard 2019-09-11 ValidFAA registration status code V: Valid registration. All codes
N5039R Cessna
172M
Fixed-wing, single engine Smooth Landings INC
Cary, Illinois
Standard 2019-09-11 ValidFAA registration status code V: Valid registration. All codes
N7052G Cessna
172K
Fixed-wing, single engine G&H Aviation
Louisville, Kentucky
Standard 2019-09-11 ValidFAA registration status code V: Valid registration. All codes
N733VH Cessna
172N
Fixed-wing, single engine Aerospace Testing Engineering & Certification INC
Seattle, Washington
Standard 2019-09-11 ValidFAA registration status code V: Valid registration. All codes
N7860G Cessna
172L
Fixed-wing, single engine Individual owner
Texas
Standard 2019-09-11 ValidFAA registration status code V: Valid registration. All codes
N786ES Joe Salomone
RV-9A
Fixed-wing, single engine Individual owner
Virginia
Experimental 2019-09-11 ValidFAA registration status code V: Valid registration. All codes
N8840N Piper
PA-28-140
Fixed-wing, single engine Individual owner
Massachusetts
Standard 2019-09-11 ValidFAA registration status code V: Valid registration. All codes
N11JW American Champion Aircraft
7GCBC
Fixed-wing, single engine Individual owner
Virginia
Standard 2019-09-10 ValidFAA registration status code V: Valid registration. All codes
N2DT Mercer Donald C
STARDUSTER II
Fixed-wing, single engine Individual owner
New York
Experimental 2019-09-10 ValidFAA registration status code V: Valid registration. All codes
N3112Z Piper
PA-22-160
Fixed-wing, single engine Individual owner
New York
Standard 2019-09-10 ValidFAA registration status code V: Valid registration. All codes
N341SL Robinson Helicopter
R22 BETA
Helicopter Individual owner
Kentucky
Standard 2019-09-10 ValidFAA registration status code V: Valid registration. All codes
N4237T Piper
PA-28-140
Fixed-wing, single engine Peak 2 Peak Enterprises LLC
Sebring, Florida
Standard 2019-09-10 ValidFAA registration status code V: Valid registration. All codes
N7264Q Cessna
172L
Fixed-wing, single engine Co-owned owner
Washington
Standard 2019-09-10 ValidFAA registration status code V: Valid registration. All codes
N737UK Cessna
172N
Fixed-wing, single engine Alternate Air INC
Seattle, Washington
Standard 2019-09-10 ValidFAA registration status code V: Valid registration. All codes
N8399L Cessna
172I
Fixed-wing, single engine Individual owner
Indiana
Standard 2019-09-10 ValidFAA registration status code V: Valid registration. All codes
N41535 Piper
PA-28-151
Fixed-wing, single engine Mjh Aviation INC
Houston, Texas
Standard 2019-09-09 ValidFAA registration status code V: Valid registration. All codes
N6198W Piper
PA-28-140
Fixed-wing, single engine Cherry Creek School District No 5
Greenwood Village, Colorado
Standard 2019-09-09 ValidFAA registration status code V: Valid registration. All codes
N6499R Piper
PA-28-140
Fixed-wing, single engine Individual owner
Florida
Standard 2019-09-09 ValidFAA registration status code V: Valid registration. All codes
N738ZR Cessna
172N
Fixed-wing, single engine Ficus Point Aviation Corporation INC
Middletown, Delaware
Standard 2019-09-09 ValidFAA registration status code V: Valid registration. All codes
N8120M Piper
PA-28-161
Fixed-wing, single engine Individual owner
Maryland
Standard 2019-09-09 ValidFAA registration status code V: Valid registration. All codes
N12503 Cessna
172M
Fixed-wing, single engine Co-owned owner
Oklahoma
Standard 2019-09-06 ValidFAA registration status code V: Valid registration. All codes
N2846Q Cessna
172L
Fixed-wing, single engine Individual owner
New York
Standard 2019-09-06 ValidFAA registration status code V: Valid registration. All codes
N461RK Krips Ray
RK1
Fixed-wing, single engine Co-owned owner
Alaska
Experimental 2019-09-06 ValidFAA registration status code V: Valid registration. All codes
N5364W Piper
PA-28
Fixed-wing, single engine Individual owner
Oklahoma
Standard 2019-09-06 ValidFAA registration status code V: Valid registration. All codes
N83FP Cessna
172N
Fixed-wing, single engine Individual owner
Texas
Standard 2019-09-06 ValidFAA registration status code V: Valid registration. All codes
N9120R Piper
PA-18
Fixed-wing, single engine Individual owner
Alaska
Standard 2019-09-06 ValidFAA registration status code V: Valid registration. All codes
N1884P Piper
PA-18-150
Fixed-wing, single engine Individual owner
Ohio
Standard 2019-09-05 ValidFAA registration status code V: Valid registration. All codes
N46221 Cessna
172I
Fixed-wing, single engine Individual owner
Michigan
Standard 2019-09-05 ValidFAA registration status code V: Valid registration. All codes
N51960 Cessna
172P
Fixed-wing, single engine Xin Han Aviation LLC
Atwater, California
Standard 2019-09-05 ValidFAA registration status code V: Valid registration. All codes
N5745U Piper
PA-28-140
Fixed-wing, single engine Individual owner
Iowa
Standard 2019-09-05 ValidFAA registration status code V: Valid registration. All codes
N6570W Piper
PA-28-140
Fixed-wing, single engine Individual owner
California
Standard 2019-09-05 ValidFAA registration status code V: Valid registration. All codes
N1476U Cessna
172M
Fixed-wing, single engine Tampa Bay Aviation INC
Clearwater, Florida
Standard 2019-09-04 ValidFAA registration status code V: Valid registration. All codes
N1950F Cessna
172N
Fixed-wing, single engine Ace of Spades Aviation LLC
Las Vegas, Nevada
Standard 2019-09-04 ValidFAA registration status code V: Valid registration. All codes
N81391 Gibney Frank A
ACRO SPORT II
Fixed-wing, single engine Individual owner
Vermont
Experimental 2019-09-04 ValidFAA registration status code V: Valid registration. All codes
N8922V Cessna
172M
Fixed-wing, single engine Tampa Bay Aviation INC
Clearwater, Florida
Standard 2019-09-04 ValidFAA registration status code V: Valid registration. All codes
N1346E Cessna
172N
Fixed-wing, single engine Individual owner
California
Standard 2019-09-03 ValidFAA registration status code V: Valid registration. All codes
N168D Piper
PA-18-150
Fixed-wing, single engine Individual owner
Alaska
Restricted 2019-09-03 ValidFAA registration status code V: Valid registration. All codes
N199AV Piper
PA-28-161
Fixed-wing, single engine Echo Mike LLC
Baldwin, New York
Standard 2019-09-03 ValidFAA registration status code V: Valid registration. All codes
N4114Y Bellanca
7GCBC
Fixed-wing, single engine Light & Variable LLC
Arlington, Virginia
Standard 2019-09-03 ValidFAA registration status code V: Valid registration. All codes
N4386R Cessna
172M
Fixed-wing, single engine Flying H LLC
Lake Placid, Florida
Standard 2019-09-03 ValidFAA registration status code V: Valid registration. All codes
N6902D Piper
PA-22-150
Fixed-wing, single engine Individual owner
Ohio
Standard 2019-09-03 ValidFAA registration status code V: Valid registration. All codes
N9921W Piper
PA-28-140
Fixed-wing, single engine Phoenix Composite Solutions LLC
Oscoda, Michigan
Standard 2019-09-03 ValidFAA registration status code V: Valid registration. All codes
N2939X Cessna
177
Fixed-wing, single engine Co-owned owner
Washington
Standard 2019-08-30 ValidFAA registration status code V: Valid registration. All codes
N3223P Baker Curtis L
LONG EZE
Fixed-wing, single engine Prestige Tech Consulting INC
Carrollton, Texas
Experimental 2019-08-30 ValidFAA registration status code V: Valid registration. All codes
N4088M Piper
PA-12
Fixed-wing, single engine Ram Aviation LLC
Palmer, Alaska
Standard 2019-08-30 ValidFAA registration status code V: Valid registration. All codes
N4807Y Piper
PA-25-235
Fixed-wing, single engine Individual owner
California
Multiple 2019-08-30 ValidFAA registration status code V: Valid registration. All codes
N4928E Cessna
172N
Fixed-wing, single engine Ace of Spades Aviation LLC
Las Vegas, Nevada
Standard 2019-08-30 ValidFAA registration status code V: Valid registration. All codes
N733LL Cessna
172N
Fixed-wing, single engine Lavalley Asset Management INC
Potsdam, New York
Standard 2019-08-30 ValidFAA registration status code V: Valid registration. All codes
N773RF Pratt Robert V
RV-4
Fixed-wing, single engine Individual owner
Texas
Experimental 2019-08-30 ValidFAA registration status code V: Valid registration. All codes
N9560V Cessna
172M
Fixed-wing, single engine Mike Smith Aviation International
Napa, California
Standard 2019-08-30 ValidFAA registration status code V: Valid registration. All codes
N32267 Piper
PA-28-151
Fixed-wing, single engine Top Flight Aviation LLC
Reedsburg, Wisconsin
Standard 2019-08-29 ValidFAA registration status code V: Valid registration. All codes
N34DV Vaughan Don K
RV 4
Fixed-wing, single engine Individual owner
Oregon
Experimental 2019-08-29 ValidFAA registration status code V: Valid registration. All codes
N3560Z Piper
PA-22-160
Fixed-wing, single engine Individual owner
Arizona
Standard 2019-08-29 ValidFAA registration status code V: Valid registration. All codes
N5834W Piper
PA-28-150
Fixed-wing, single engine Individual owner
Virginia
Standard 2019-08-29 ValidFAA registration status code V: Valid registration. All codes
N6476R Piper
PA-28-140
Fixed-wing, single engine Individual owner
Michigan
Standard 2019-08-29 ValidFAA registration status code V: Valid registration. All codes
N6814B Piper
PA-22-150
Fixed-wing, single engine Individual owner
Illinois
Standard 2019-08-29 ValidFAA registration status code V: Valid registration. All codes
N733VL Cessna
172N
Fixed-wing, single engine Yuma AG Service INC
Yuma, Colorado
Standard 2019-08-29 ValidFAA registration status code V: Valid registration. All codes
N8767D Piper
PA-22-160
Fixed-wing, single engine Individual owner
Georgia
Standard 2019-08-29 ValidFAA registration status code V: Valid registration. All codes
N9150D Piper
PA-18A 150
Fixed-wing, single engine Individual owner
Alaska
Standard 2019-08-29 ValidFAA registration status code V: Valid registration. All codes
N95285 Piper
PA-28-140
Fixed-wing, single engine Individual owner
Florida
Standard 2019-08-29 ValidFAA registration status code V: Valid registration. All codes
N172Z Cessna
172K
Fixed-wing, single engine Co-owned owner
California
Standard 2019-08-28 ValidFAA registration status code V: Valid registration. All codes
N61925 Cessna
172M
Fixed-wing, single engine St Pete Aviation Services LLC
Saint Petersburg, Florida
Standard 2019-08-28 ValidFAA registration status code V: Valid registration. All codes
N7623G Cessna
172L
Fixed-wing, single engine Plane Sane Aero LLC
Cary, North Carolina
Standard 2019-08-28 ValidFAA registration status code V: Valid registration. All codes
N3921K Piper
PA-28-140
Fixed-wing, single engine Individual owner
Alabama
Standard 2019-08-27 ValidFAA registration status code V: Valid registration. All codes
N73728 Cessna
172N
Fixed-wing, single engine Co-owned owner
Texas
Standard 2019-08-27 ValidFAA registration status code V: Valid registration. All codes
N13143 Cessna
172M
Fixed-wing, single engine Individual owner
Kansas
Standard 2019-08-26 ValidFAA registration status code V: Valid registration. All codes
N2312Z Beech
23
Fixed-wing, single engine Dfr LLC
Giltner, Nebraska
Standard 2019-08-26 ValidFAA registration status code V: Valid registration. All codes
N3767P Piper
PA-18A
Fixed-wing, single engine Co-owned owner
Arizona
Standard 2019-08-26 ValidFAA registration status code V: Valid registration. All codes
N50036 Lauritsen Ralph M
RV 4
Fixed-wing, single engine Individual owner
South Dakota
Experimental 2019-08-26 ValidFAA registration status code V: Valid registration. All codes
N5025C Bellanca
7GCBC
Fixed-wing, single engine Individual owner
Alaska
Standard 2019-08-26 ValidFAA registration status code V: Valid registration. All codes
N5610U Piper
PA-28-140
Fixed-wing, single engine Anderson Aviation LLC
Bulverde, Texas
Standard 2019-08-26 ValidFAA registration status code V: Valid registration. All codes
N73103 Cessna
172M
Fixed-wing, single engine Bfl Aviation LLC
Bakersfield, California
Standard 2019-08-26 ValidFAA registration status code V: Valid registration. All codes
N82600 Piper
PA-18-150
Fixed-wing, single engine Individual owner
Utah
Standard 2019-08-26 ValidFAA registration status code V: Valid registration. All codes
N9189T Piper
PA-18-150
Fixed-wing, single engine Individual owner
Alaska
Standard 2019-08-26 ValidFAA registration status code V: Valid registration. All codes
N35371 Cessna
172I
Fixed-wing, single engine Individual owner
Nevada
Standard 2019-08-23 ValidFAA registration status code V: Valid registration. All codes
N3856X Aero Commander
100
Fixed-wing, single engine Co-owned owner
Missouri
Standard 2019-08-23 ValidFAA registration status code V: Valid registration. All codes
N7266J Piper
PA-28-140
Fixed-wing, single engine Individual owner
Oregon
Standard 2019-08-23 ValidFAA registration status code V: Valid registration. All codes
N7454G Cessna
172K
Fixed-wing, single engine Individual owner
Florida
Standard 2019-08-23 ValidFAA registration status code V: Valid registration. All codes
N80332 Cessna
172M
Fixed-wing, single engine Individual owner
Arkansas
Standard 2019-08-23 ValidFAA registration status code V: Valid registration. All codes
N141J Stocks Judy K
RV-6A
Fixed-wing, single engine Individual owner
Texas
Experimental 2019-08-22 ValidFAA registration status code V: Valid registration. All codes
N1424T Piper
PA-28-140
Fixed-wing, single engine Individual owner
Texas
Standard 2019-08-22 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.