The U.S. aircraft register, updated daily
Engines · piston (reciprocating) · data as of October 7, 2026

Continental O-300 series

6,623 aircraft on the U.S. register carry a Continental O-300 series engine, rated at about 145 horsepower. The Cessna 172 Skyhawk is the model most often fitted with it (6,073 aircraft). The aircraft carrying it were built between 1949 and 2021.

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 Continental O-300 series. FAA spelling: 0-300 SER.

When the aircraft were built by decade

By decade built, as a table
aircraft
194062
19501,889
19603,524
197014
19803
19902
20003
20201

What the FAA has certified, ordered and been told about the Continental O-300 series the component layer

The design is held under 1 type certificate (E-253, held by Continental Aerospace Technologies, INC.). The FAA has issued 7 airworthiness directives (orders that owners must comply with) that name this engine series. Operators and repair shops have filed 38 failure reports with the FAA since 1995, 5 of them in the last ten years.

FAA orders 7 airworthiness directives · newest first

2023-10-262023-17-04 · Reciprocating Engine Oil System · engine
2022-03-292022-04-04 · Reciprocating Engine Oil System · engine
2012-01-242011-26-07 · Engine · engine
2002-07-122002-13-04 · Magneto impulse coupling stop pin · engine
1996-02-1394-05-05 R1 · Cylinder Rocker · engine
1993-08-1293-10-02 · Missing Cylinder Valve Retainer Key · engine

All orders naming the Continental O-300 series

Failure reports 38 since · what operators and shops told the FAA

025810960511219
Failure reports by year, as a table
reports
961
013
024
0310
043
052
062
075
082
091
111
121
131
192

Parts most often reported as the reports name them

Baffle4Cylinder3Bulkhead2Connecting Rod2Stringer2Wheel2Adapter1Axle1Battery1Bearing Cage1
Parts most reported, as a table
reports
Baffle4
Cylinder3
Bulkhead2
Connecting Rod2
Stringer2
Wheel2
Adapter1
Axle1
Battery1
Bearing Cage1

Latest reports

2019-11-19Line: broken
2019-05-10Cylinder: cracked
2013-02-22Counterweight: loose
2012-07-10Cylinder: cracked
2011-08-08Cylinder: broken

Certificates and bulletins

E-253Type certificate held by Continental Aerospace Technologies, INC. · 8 models listed · revised September 19, 2022

Safety bulletins 3 · advice, not orders

2018-09-10NE-18-27 · POWERPLANT Rocker Shaft Boss Inspection
2016-03-08NE-16-13 · Powerplant - Prohibited use of sealant
2012-10-31NE-13-04 · Continental Motors, Inc. (CMI) Connecting Rod Piston Pin Bushing Inspection

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/continental-o-300-series.json.

Aircraft newest certificates first · 6,623

Tail no.Maker and modelGroupOwner and baseCertificateRegisteredStatus
N3933S Cessna
172E
Fixed-wing, single engine Frontline Aviation LLC
Blackshear, Georgia
Standard 2025-05-22 ValidFAA registration status code V: Valid registration. All codes
N8134B Cessna
172
Fixed-wing, single engine Treefo Bravo LLC
Hawkins, Texas
Standard 2025-05-22 ValidFAA registration status code V: Valid registration. All codes
N3907R Cessna
172H
Fixed-wing, single engine Nexgen Aviation LLC
Ennis, Texas
Standard 2025-05-21 ValidFAA registration status code V: Valid registration. All codes
N6041A Cessna
172
Fixed-wing, single engine Klosterman Aviation LLC
Celina, Ohio
Standard 2025-05-21 ValidFAA registration status code V: Valid registration. All codes
N6812X Cessna
172A
Fixed-wing, single engine Big Sky Aviation INC
Wilmington, Delaware
Standard 2025-05-20 ValidFAA registration status code V: Valid registration. All codes
N7415A Cessna
172
Fixed-wing, single engine Individual owner
Georgia
Standard 2025-05-20 ValidFAA registration status code V: Valid registration. All codes
N8003X Cessna
172B
Fixed-wing, single engine Individual owner
Minnesota
Standard 2025-05-20 ValidFAA registration status code V: Valid registration. All codes
N1342F Cessna
172G
Fixed-wing, single engine Co-owned owner
California
Standard 2025-05-19 ValidFAA registration status code V: Valid registration. All codes
N4693L Cessna
172G
Fixed-wing, single engine Emerald Air LLC
Snohomish, Washington
Standard 2025-05-19 ValidFAA registration status code V: Valid registration. All codes
N6610A Cessna
172
Fixed-wing, single engine Individual owner
Oregon
Standard 2025-05-19 ValidFAA registration status code V: Valid registration. All codes
N8301U Cessna
172F
Fixed-wing, single engine N8301U LLC
White Springs, Florida
Standard 2025-05-19 ValidFAA registration status code V: Valid registration. All codes
N5972A Cessna
172
Fixed-wing, single engine Individual owner
Texas
Standard 2025-05-16 ValidFAA registration status code V: Valid registration. All codes
N8804U Cessna
172F
Fixed-wing, single engine Paradox Investments Pacnw LLC
San Antonio, Texas
Standard 2025-05-16 ValidFAA registration status code V: Valid registration. All codes
N8527B Cessna
172
Fixed-wing, single engine Individual owner
Alaska
Standard 2025-05-15 ValidFAA registration status code V: Valid registration. All codes
N3883R Cessna
172H
Fixed-wing, single engine Individual owner
Colorado
Standard 2025-05-14 ValidFAA registration status code V: Valid registration. All codes
N8813U Cessna
172F
Fixed-wing, single engine Aerios Air LLC
Midland, Texas
Standard 2025-05-14 ValidFAA registration status code V: Valid registration. All codes
N1902Z Cessna
150C
Fixed-wing, single engine 1St Stop Aviation Services and Consulting LLC
Tulsa, Oklahoma
Standard 2025-05-13 ValidFAA registration status code V: Valid registration. All codes
N7445X Cessna
172B
Fixed-wing, single engine Individual owner
Arizona
Standard 2025-05-13 ValidFAA registration status code V: Valid registration. All codes
N8167L Cessna
172H
Fixed-wing, single engine Co-owned owner
Washington
Standard 2025-05-13 ValidFAA registration status code V: Valid registration. All codes
N1307Y Cessna
172C
Fixed-wing, single engine Orange County Flight Center INC
Santa Ana, California
Standard 2025-05-09 ValidFAA registration status code V: Valid registration. All codes
N8044B Cessna
172
Fixed-wing, single engine Individual owner
North Carolina
Standard 2025-05-09 ValidFAA registration status code V: Valid registration. All codes
N3889R Cessna
172H
Fixed-wing, single engine Individual owner
North Carolina
Standard 2025-05-08 ValidFAA registration status code V: Valid registration. All codes
N7105A Cessna
172
Fixed-wing, single engine Individual owner
Ohio
Restricted 2025-05-08 ValidFAA registration status code V: Valid registration. All codes
N9163B Cessna
172
Fixed-wing, single engine Individual owner
North Carolina
Standard 2025-05-08 ValidFAA registration status code V: Valid registration. All codes
N2675U Cessna
172D
Fixed-wing, single engine Av Hawk Aviation LLC
Montclair, New Jersey
Standard 2025-05-07 ValidFAA registration status code V: Valid registration. All codes
N3720F Cessna
172H
Fixed-wing, single engine Individual owner
Virginia
Standard 2025-05-07 ValidFAA registration status code V: Valid registration. All codes
N75E Cessna
172H
Fixed-wing, single engine Aero Techniques INC
Portage, Michigan
Standard 2025-05-07 ValidFAA registration status code V: Valid registration. All codes
N9144B Cessna
172
Fixed-wing, single engine Individual owner
Illinois
Standard 2025-05-07 ValidFAA registration status code V: Valid registration. All codes
N5504T Cessna
172E
Fixed-wing, single engine Individual owner
California
Standard 2025-05-06 ValidFAA registration status code V: Valid registration. All codes
N7587T Cessna
172A
Fixed-wing, single engine Individual owner
Florida
Standard 2025-05-06 ValidFAA registration status code V: Valid registration. All codes
N7742T Cessna
172A
Fixed-wing, single engine Individual owner
Oregon
Standard 2025-05-06 ValidFAA registration status code V: Valid registration. All codes
N5723R Cessna
172F
Fixed-wing, single engine Individual owner
Alaska
Standard 2025-05-02 ValidFAA registration status code V: Valid registration. All codes
N7470A Cessna
172
Fixed-wing, single engine Individual owner
Georgia
Standard 2025-05-02 ValidFAA registration status code V: Valid registration. All codes
N5821A Cessna
172
Fixed-wing, single engine Individual owner
Texas
Standard 2025-05-01 ValidFAA registration status code V: Valid registration. All codes
N7173T Cessna
172A
Fixed-wing, single engine Individual owner
Wisconsin
Standard 2025-05-01 ValidFAA registration status code V: Valid registration. All codes
N3748R Cessna
172H
Fixed-wing, single engine Rotormate LLC
Royse City, Texas
Standard 2025-04-29 ValidFAA registration status code V: Valid registration. All codes
N2488U Cessna
172D
Fixed-wing, single engine Individual owner
Alaska
Standard 2025-04-28 ValidFAA registration status code V: Valid registration. All codes
N2890C Cessna
170B
Fixed-wing, single engine Spenchen Holdings LLC
Arnaudville, Louisiana
Standard 2025-04-22 ValidFAA registration status code V: Valid registration. All codes
N5428T Cessna
172E
Fixed-wing, single engine Co-owned owner
California
Standard 2025-04-22 ValidFAA registration status code V: Valid registration. All codes
N7656X Cessna
172B
Fixed-wing, single engine Individual owner
California
Standard 2025-04-22 ValidFAA registration status code V: Valid registration. All codes
N7886U Cessna
172F
Fixed-wing, single engine Individual owner
Virginia
Standard 2025-04-22 ValidFAA registration status code V: Valid registration. All codes
N7000T Cessna
172
Fixed-wing, single engine Individual owner
Tennessee
Multiple 2025-04-21 ValidFAA registration status code V: Valid registration. All codes
N7446T Cessna
172A
Fixed-wing, single engine Got Wings LLC
Woodbury, New York
Standard 2025-04-21 ValidFAA registration status code V: Valid registration. All codes
N9804T Cessna
172A
Fixed-wing, single engine Co-owned owner
New York
Standard 2025-04-18 ValidFAA registration status code V: Valid registration. All codes
N2401L Cessna
172H
Fixed-wing, single engine Delta Ridge Farms LLC
Oak Grove, Louisiana
Standard 2025-04-17 ValidFAA registration status code V: Valid registration. All codes
N380LA Cessna
172G
Fixed-wing, single engine Individual owner
Texas
Standard 2025-04-17 ValidFAA registration status code V: Valid registration. All codes
N3963S Cessna
172E
Fixed-wing, single engine Individual owner
Ohio
Standard 2025-04-17 ValidFAA registration status code V: Valid registration. All codes
N7934U Cessna
172F
Fixed-wing, single engine Greene County Holdings LLC
Cohoes, New York
Standard 2025-04-17 ValidFAA registration status code V: Valid registration. All codes
N8024B Cessna
172
Fixed-wing, single engine Hatchie River Aviation LLC
Kalispell, Montana
Standard 2025-04-17 ValidFAA registration status code V: Valid registration. All codes
N8640U Cessna
172F
Fixed-wing, single engine Sunnyside Aviation Pllc
Theodosia, Missouri
Standard 2025-04-17 ValidFAA registration status code V: Valid registration. All codes
N7906X Cessna
172B
Fixed-wing, single engine Co-owned owner
Colorado
Standard 2025-04-16 ValidFAA registration status code V: Valid registration. All codes
N8969B Cessna
172
Fixed-wing, single engine Individual owner
Indiana
Standard 2025-04-16 ValidFAA registration status code V: Valid registration. All codes
N8291X Cessna
172C
Fixed-wing, single engine Individual owner
New York
Standard 2025-04-15 ValidFAA registration status code V: Valid registration. All codes
N8335U Cessna
172F
Fixed-wing, single engine Individual owner
Georgia
Standard 2025-04-15 ValidFAA registration status code V: Valid registration. All codes
N8842U Cessna
172F
Fixed-wing, single engine Hwa LLC
Charleston, South Carolina
Standard 2025-04-15 ValidFAA registration status code V: Valid registration. All codes
N1173F Cessna
172G
Fixed-wing, single engine True Course LLC
West Monroe, New York
Standard 2025-04-14 ValidFAA registration status code V: Valid registration. All codes
N1443F Cessna
172H
Fixed-wing, single engine Co-owned owner
Oregon
Standard 2025-04-14 ValidFAA registration status code V: Valid registration. All codes
N8076L Cessna
172H
Fixed-wing, single engine Way Properties LLC
Tumbling Shoals, Arkansas
Standard 2025-04-14 ValidFAA registration status code V: Valid registration. All codes
N123PY Cessna
172G
Fixed-wing, single engine Individual owner
Mississippi
Standard 2025-04-12 ValidFAA registration status code V: Valid registration. All codes
N6458B Cessna
172
Fixed-wing, single engine Co-owned owner
New Mexico
Standard 2025-04-11 ValidFAA registration status code V: Valid registration. All codes
N2372U Cessna
172D
Fixed-wing, single engine Sky View Aviation LLC
Lenoir, North Carolina
Standard 2025-04-09 ValidFAA registration status code V: Valid registration. All codes
N8709U Cessna
172F
Fixed-wing, single engine Co-owned owner
New Mexico
Standard 2025-04-09 ValidFAA registration status code V: Valid registration. All codes
N9187B Cessna
172
Fixed-wing, single engine Individual owner
Texas
Multiple 2025-04-09 ValidFAA registration status code V: Valid registration. All codes
N8040X Cessna
172B
Fixed-wing, single engine Mj Coop LLC
Sylva, North Carolina
Standard 2025-04-08 ValidFAA registration status code V: Valid registration. All codes
N3814S Cessna
172E
Fixed-wing, single engine Withheld at owner's request
Standard 2025-04-07 ValidFAA registration status code V: Valid registration. All codes
N8936B Cessna
172
Fixed-wing, single engine Individual owner
Oklahoma
Standard 2025-04-07 ValidFAA registration status code V: Valid registration. All codes
N9869T Cessna
172A
Fixed-wing, single engine Individual owner
Texas
Standard 2025-04-04 ValidFAA registration status code V: Valid registration. All codes
N2414Y Cessna
172D
Fixed-wing, single engine High Flight LLC
Casey, Illinois
Standard 2025-04-03 ValidFAA registration status code V: Valid registration. All codes
N2923U Cessna
172D
Fixed-wing, single engine Co-owned owner
Wisconsin
Standard 2025-04-03 ValidFAA registration status code V: Valid registration. All codes
N3735F Cessna
172H
Fixed-wing, single engine Eb Flight Training LLC
Daytona Beach, Florida
Standard 2025-04-03 ValidFAA registration status code V: Valid registration. All codes
N6065A Cessna
172
Fixed-wing, single engine Mam Air LLC
Stone Creek, Ohio
Standard 2025-04-03 ValidFAA registration status code V: Valid registration. All codes
N8037L Cessna
172H
Fixed-wing, single engine Skyglide LLC
St George, Utah
Standard 2025-04-03 ValidFAA registration status code V: Valid registration. All codes
N8110U Cessna
172F
Fixed-wing, single engine Individual owner
Arkansas
Standard 2025-04-03 ValidFAA registration status code V: Valid registration. All codes
N8146U Cessna
172F
Fixed-wing, single engine Individual owner
Arizona
Standard 2025-04-03 ValidFAA registration status code V: Valid registration. All codes
N170KW Cessna
170B
Fixed-wing, single engine Co-owned owner
Texas
Standard 2025-04-02 ValidFAA registration status code V: Valid registration. All codes
N5057A Cessna
172
Fixed-wing, single engine Soar Above Flight Solutions LLC
Englewood, Tennessee
Standard 2025-04-02 ValidFAA registration status code V: Valid registration. All codes
N7126A Cessna
172
Fixed-wing, single engine Individual owner
Indiana
Standard 2025-04-02 ValidFAA registration status code V: Valid registration. All codes
N7933B Cessna
172
Fixed-wing, single engine Individual owner
Mississippi
Standard 2025-04-02 ValidFAA registration status code V: Valid registration. All codes
N8246L Cessna
172H
Fixed-wing, single engine Individual owner
Texas
Standard 2025-04-02 ValidFAA registration status code V: Valid registration. All codes
N5720C Cessna
170A
Fixed-wing, single engine Individual owner
Nebraska
Standard 2025-04-01 ValidFAA registration status code V: Valid registration. All codes
N7207T Cessna
172A
Fixed-wing, single engine Individual owner
Alaska
Standard 2025-04-01 ValidFAA registration status code V: Valid registration. All codes
N3758F Cessna
172H
Fixed-wing, single engine Tvpx Aircraft Solutions Inctrustee
North Salt Lake, Utah
Standard 2025-03-31 ValidFAA registration status code V: Valid registration. All codes
N4263L Cessna
172G
Fixed-wing, single engine Individual owner
Texas
Standard 2025-03-31 ValidFAA registration status code V: Valid registration. All codes
N5016A Cessna
172
Fixed-wing, single engine Individual owner
Texas
Standard 2025-03-31 ValidFAA registration status code V: Valid registration. All codes
N1759F Cessna
172H
Fixed-wing, single engine Oklahoma Flight Academy LLC
Owasso, Oklahoma
Standard 2025-03-29 ValidFAA registration status code V: Valid registration. All codes
N7778U Cessna
172E
Fixed-wing, single engine Angel del Mar LLC
Park City, Utah
Standard 2025-03-28 ValidFAA registration status code V: Valid registration. All codes
N3741F Cessna
172H
Fixed-wing, single engine Individual owner
Virginia
Standard 2025-03-27 ValidFAA registration status code V: Valid registration. All codes
N3901L Cessna
172G
Fixed-wing, single engine San Fernando Aviation LLC
Van Nuys, California
Standard 2025-03-27 ValidFAA registration status code V: Valid registration. All codes
N8466X Cessna
172C
Fixed-wing, single engine Eagle East Aviation INC
North Andover, Massachusetts
Standard 2025-03-27 ValidFAA registration status code V: Valid registration. All codes
N112N Cessna
172
Fixed-wing, single engine Individual owner
Texas
Standard 2025-03-26 ValidFAA registration status code V: Valid registration. All codes
N3829L Cessna
172G
Fixed-wing, single engine Mustang Aviation LLC
Waterville, Maine
Standard 2025-03-26 ValidFAA registration status code V: Valid registration. All codes
N8254X Cessna
172C
Fixed-wing, single engine Hd Security Systems INC
Watertown, Tennessee
Standard 2025-03-25 ValidFAA registration status code V: Valid registration. All codes
N3255L Cessna
172H
Fixed-wing, single engine Individual owner
Arkansas
Standard 2025-03-24 ValidFAA registration status code V: Valid registration. All codes
N4237F Cessna
172
Fixed-wing, single engine Individual owner
North Dakota
Standard 2025-03-24 ValidFAA registration status code V: Valid registration. All codes
N5503T Cessna
172E
Fixed-wing, single engine Aivia Aviation LLC
Estes Park, Colorado
Standard 2025-03-24 ValidFAA registration status code V: Valid registration. All codes
N78314 Temco
GC-1B
Fixed-wing, single engine Individual owner
Florida
Standard 2025-03-24 ValidFAA registration status code V: Valid registration. All codes
N6423B Cessna
172
Fixed-wing, single engine Co-owned owner
Virginia
Standard 2025-03-23 ValidFAA registration status code V: Valid registration. All codes
N7019A Cessna
172
Fixed-wing, single engine Individual owner
Texas
Standard 2025-03-23 ValidFAA registration status code V: Valid registration. All codes
N7115A Cessna
172
Fixed-wing, single engine Individual owner
Florida
Standard 2025-03-22 ValidFAA registration status code V: Valid registration. All codes
N5333T Cessna
172H
Fixed-wing, single engine Individual owner
Washington
Standard 2025-03-21 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 7, 2026. Horsepower and thrust are the FAA's figures for the series, not for a particular aircraft.