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

Continental IO-520 series

9,484 aircraft on the U.S. register carry a Continental IO-520 series engine, rated at about 285 horsepower. The Beechcraft V35 Bonanza is the model most often fitted with it (1,496 aircraft). The aircraft carrying it were built between 1963 and 2017.

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 IO-520 series. FAA spelling: IO 520 SERIES.

When the aircraft were built by decade

By decade built, as a table
aircraft
194012
195037
19602,627
19704,534
19801,114
1990189
20005
20102

What the FAA has certified, ordered and been told about the Continental IO-520 series the component layer

The design is held under 1 type certificate (E5CE, held by Continental Aerospace Technologies, INC.). The FAA has issued 30 airworthiness directives (orders that owners must comply with) that name this engine series. Operators and repair shops have filed 465 failure reports with the FAA since 1995, 26 of them in the last ten years.

FAA orders 30 airworthiness directives · newest first

2023-10-262023-17-04 · Reciprocating Engine Oil System · engine
2023-03-152023-05-16 · Reciprocating Engine Power Section · engine
2023-02-232023-04-08 · Reciprocating Engine Power Section · engine
2023-02-172023-02-12 · Engine Air Intake System · engine
2022-08-152022-16-03 · Engine (RECIPROCATING) · engine
2022-03-292022-04-04 · Reciprocating Engine Oil System · engine

All orders naming the Continental IO-520 series

Failure reports 465 since · what operators and shops told the FAA

016314662950005101520224
Failure reports by year, as a table
reports
9515
962
971
981
995
0037
0148
0258
0346
0435
0562
0617
0718
0817
0910
1020
1115
1213
139
1410
1512
164
172
181
192
202
221
242

Parts most often reported as the reports name them

Cylinder26Cylinder Head25Relay20Hub14Circuit Breaker13Antenna12Line12Bolt10Bracket9Control Cable9
Parts most reported, as a table
reports
Cylinder26
Cylinder Head25
Relay20
Hub14
Circuit Breaker13
Antenna12
Line12
Bolt10
Bracket9
Control Cable9

Latest reports

2024-04-06Engine: power loss
2024-04-06Engine: power loss
2022-01-21None: none
2020-07-10Rod: broken
2020-01-15Turnbuckle: corroded

Certificates and bulletins

E5CEType certificate held by Continental Aerospace Technologies, INC. · 18 models listed · revised March 8, 2022

Safety bulletins 11 · advice, not orders

2020-04-06NE-20-05 · POWERPLANT - Engine Camshaft Gear Tooth Fracture
2018-06-20NE-18-16 · POWERPLANT Alternator Drive Coupling
2017-05-10NE-17-11 · POWERPLANT Engine damage as a result of kickback
2016-03-08NE-16-13 · Powerplant - Prohibited use of sealant
2013-02-08NE-13-15 · Engine Controls: Continental Motors, Inc. (CMI) Throttle and Mixture Control Levers

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

These connections as data: /graph/engine/continental-io-520-series.json · about the eFlight graph.

Aircraft newest certificates first · 9,484

Tail no.Maker and modelGroupOwner and baseCertificateRegisteredStatus
N93546 Bellanca
17-30A
Fixed-wing, single engine Individual owner
Texas
Standard 2022-04-06 ValidFAA registration status code V: Valid registration. All codes
N210JZ Cessna
210N
Fixed-wing, single engine D & B Innovations LLC
Amarillo, Texas
Standard 2022-04-04 ValidFAA registration status code V: Valid registration. All codes
N4661M Beech
A36
Fixed-wing, single engine F & W Aviation CO LLC
Wilmington, Delaware
Standard 2022-04-04 ValidFAA registration status code V: Valid registration. All codes
N4931R Cessna
A188B
Fixed-wing, single engine Individual owner
Nebraska
Restricted 2022-04-04 ValidFAA registration status code V: Valid registration. All codes
N4957F Cessna
U206B
Fixed-wing, single engine Bravo Hotel LLC
Lewes, Delaware
Standard 2022-04-02 ValidFAA registration status code V: Valid registration. All codes
N8466Q Cessna
A185F
Fixed-wing, single engine Airtime LLC
Dayton, Idaho
Standard 2022-04-02 ValidFAA registration status code V: Valid registration. All codes
N185ZM Cessna
A185F
Fixed-wing, single engine Dragon Wagon LLC
Clackamas, Oregon
Standard 2022-04-01 ValidFAA registration status code V: Valid registration. All codes
N2220S Cessna
210L
Fixed-wing, single engine Sb Meridian LLC
Heber, California
Standard 2022-04-01 ValidFAA registration status code V: Valid registration. All codes
N2825X Cessna
P206
Fixed-wing, single engine James Ray INC
Twin Falls, Idaho
Standard 2022-04-01 ValidFAA registration status code V: Valid registration. All codes
N4468S Beech
A36
Fixed-wing, single engine Co-owned owner
Mississippi
Standard 2022-04-01 ValidFAA registration status code V: Valid registration. All codes
N551JB Cessna
210L
Fixed-wing, single engine Oc Aircraft Sales INC
Newport Beach, California
Standard 2022-04-01 ValidFAA registration status code V: Valid registration. All codes
N8275M Cessna
210K
Fixed-wing, single engine Valiair Limited Company Trustee
Casper, Wyoming
Standard 2022-04-01 ValidFAA registration status code V: Valid registration. All codes
N119DS Cessna
A185F
Fixed-wing, single engine Deltasierra LLC
Staunton, Virginia
Standard 2022-03-31 ValidFAA registration status code V: Valid registration. All codes
N1740W Beech
G33
Fixed-wing, single engine Carlsbad Raceway CORP
Hemet, California
Standard 2022-03-31 ValidFAA registration status code V: Valid registration. All codes
N7239R Beech
58
Fixed-wing, multi-engine Co-owned owner
Florida
Standard 2022-03-31 ValidFAA registration status code V: Valid registration. All codes
N8337N Beech
V35A
Fixed-wing, single engine Individual owner
Texas
Standard 2022-03-31 ValidFAA registration status code V: Valid registration. All codes
N5618S Beech
95-C55
Fixed-wing, multi-engine Co-owned owner
California
Standard 2022-03-30 ValidFAA registration status code V: Valid registration. All codes
N4102S Beech
E-55
Fixed-wing, multi-engine Flying Drahthaar LLC
Billings, Montana
Standard 2022-03-28 ValidFAA registration status code V: Valid registration. All codes
N611W Beech
D55
Fixed-wing, multi-engine Fly Whiskey LLC
Fitzgerald, Georgia
Standard 2022-03-28 ValidFAA registration status code V: Valid registration. All codes
N73JW Beech
E-55
Fixed-wing, multi-engine Individual owner
California
Standard 2022-03-28 ValidFAA registration status code V: Valid registration. All codes
N1298R Bellanca
17-30A
Fixed-wing, single engine Southern Utah University
Cedar City, Utah
Standard 2022-03-26 ValidFAA registration status code V: Valid registration. All codes
N3750Y Cessna
210D
Fixed-wing, single engine Individual owner
Florida
Standard 2022-03-26 ValidFAA registration status code V: Valid registration. All codes
N6416N Beech
A36
Fixed-wing, single engine Individual owner
Florida
Standard 2022-03-26 ValidFAA registration status code V: Valid registration. All codes
N70TP Beech
F33A
Fixed-wing, single engine Black Eagle Aviation LLC
Livonia, Michigan
Standard 2022-03-26 ValidFAA registration status code V: Valid registration. All codes
N61155 Cessna
A185F
Fixed-wing, single engine Individual owner
Alaska
Multiple 2022-03-25 ValidFAA registration status code V: Valid registration. All codes
N7185N Beech
V35A
Fixed-wing, single engine Novac Consulting Group LLC
Scottsdale, Arizona
Standard 2022-03-24 ValidFAA registration status code V: Valid registration. All codes
N77UP Beech
E33A
Fixed-wing, single engine 423 LLC
Mankato, Minnesota
Standard 2022-03-24 ValidFAA registration status code V: Valid registration. All codes
N8951M Beech
S35
Fixed-wing, single engine Co-owned owner
Kentucky
Standard 2022-03-24 ValidFAA registration status code V: Valid registration. All codes
N748WP Cessna
A185E
Fixed-wing, single engine Individual owner
Alaska
Standard 2022-03-23 ValidFAA registration status code V: Valid registration. All codes
N7762R Beech
D55
Fixed-wing, multi-engine Possumtown Alleycats LLC
Midland, Texas
Standard 2022-03-23 ValidFAA registration status code V: Valid registration. All codes
N125BE Beech
58
Fixed-wing, multi-engine Individual owner
Florida
Standard 2022-03-22 ValidFAA registration status code V: Valid registration. All codes
N33FC Cessna
A185E
Fixed-wing, single engine Reece Trucking and Excavating INC
Marysville, Washington
Standard 2022-03-22 ValidFAA registration status code V: Valid registration. All codes
N9720E Bellanca
17-30A
Fixed-wing, single engine Individual owner
Virginia
Standard 2022-03-22 ValidFAA registration status code V: Valid registration. All codes
N67JW Beech
A36
Fixed-wing, single engine Individual owner
Texas
Standard 2022-03-21 ValidFAA registration status code V: Valid registration. All codes
N202J Beech
S35
Fixed-wing, single engine Riche Aviation LLC
Baton Rouge, Louisiana
Standard 2022-03-19 ValidFAA registration status code V: Valid registration. All codes
N8WF Cessna
A185F
Fixed-wing, single engine Withheld at owner's request
Standard 2022-03-18 ValidFAA registration status code V: Valid registration. All codes
N6198A Beech
A36
Fixed-wing, single engine Co-owned owner
Tennessee
Standard 2022-03-16 ValidFAA registration status code V: Valid registration. All codes
N62RJ Beech
F33A
Fixed-wing, single engine B e Hassett Millwrights INC
Harrods Creek, Kentucky
Standard 2022-03-15 ValidFAA registration status code V: Valid registration. All codes
N8332N Beech
V35A
Fixed-wing, single engine Moon Kai LLC
Laguna Niguel, California
Standard 2022-03-15 ValidFAA registration status code V: Valid registration. All codes
N5875J Beech
S35
Fixed-wing, single engine Co-owned owner
Texas
Standard 2022-03-14 ValidFAA registration status code V: Valid registration. All codes
N778RW Beech
F33A
Fixed-wing, single engine Southerly Winds LLC
Rogers, Arkansas
Standard 2022-03-14 ValidFAA registration status code V: Valid registration. All codes
N89PD Beech
A36
Fixed-wing, single engine Caleta Ventures LLC
Richmond, Texas
Standard 2022-03-14 ValidFAA registration status code V: Valid registration. All codes
N3109W Beech
E-55
Fixed-wing, multi-engine III Per LLC
Lewes, Delaware
Standard 2022-03-12 ValidFAA registration status code V: Valid registration. All codes
N5707K Beech
S35
Fixed-wing, single engine Individual owner
Alabama
Standard 2022-03-12 ValidFAA registration status code V: Valid registration. All codes
N6034N Cessna
A185F
Fixed-wing, single engine Circle Airtrails LLC
Anchorage, Alaska
Standard 2022-03-12 ValidFAA registration status code V: Valid registration. All codes
N635V Beech
V35
Fixed-wing, single engine Sun Up Farm LLC
Nacogdoches, Texas
Standard 2022-03-12 ValidFAA registration status code V: Valid registration. All codes
N881S Beech
F33A
Fixed-wing, single engine Turney Michael L
Amador City, California
Standard 2022-03-12 ValidFAA registration status code V: Valid registration. All codes
N4572S Beech
A36
Fixed-wing, single engine Individual owner
Minnesota
Standard 2022-03-11 ValidFAA registration status code V: Valid registration. All codes
N3012H Beech
F33A
Fixed-wing, single engine Bonanza Two USA INC Trustee
Wilmington, Delaware
Standard 2022-03-10 ValidFAA registration status code V: Valid registration. All codes
N778VK Cessna
210M
Fixed-wing, single engine Puerto Rico Management Services INC
Coral Gables, Florida
Standard 2022-03-09 ValidFAA registration status code V: Valid registration. All codes
N93MT Beech
A36
Fixed-wing, single engine J2 Sky LLC
Encinitas, California
Standard 2022-03-09 ValidFAA registration status code V: Valid registration. All codes
N9475S Beech
35-C33A
Fixed-wing, single engine Individual owner
Washington
Standard 2022-03-08 ValidFAA registration status code V: Valid registration. All codes
N191BF Beech
F33A
Fixed-wing, single engine Individual owner
Illinois
Standard 2022-03-05 ValidFAA registration status code V: Valid registration. All codes
N382CB Bellanca
17-30A
Fixed-wing, single engine Individual owner
Kentucky
Standard 2022-03-05 ValidFAA registration status code V: Valid registration. All codes
N7653N Beech
V35A
Fixed-wing, single engine Individual owner
Tennessee
Standard 2022-03-05 ValidFAA registration status code V: Valid registration. All codes
N8101C Beech
F33A
Fixed-wing, single engine Individual owner
Nevada
Standard 2022-03-02 ValidFAA registration status code V: Valid registration. All codes
N136CD Beech
A36
Fixed-wing, single engine Co-owned owner
Indiana
Standard 2022-03-01 ValidFAA registration status code V: Valid registration. All codes
N4948Q Cessna
A185F
Fixed-wing, single engine Individual owner
Alaska
Multiple 2022-03-01 ValidFAA registration status code V: Valid registration. All codes
N5442U Beech
V35
Fixed-wing, single engine Individual owner
Florida
Standard 2022-02-26 ValidFAA registration status code V: Valid registration. All codes
N7017N Beech
D55
Fixed-wing, multi-engine Salinas Nursery INC
Fresno, California
Standard 2022-02-26 ValidFAA registration status code V: Valid registration. All codes
N519R Beech
F33A
Fixed-wing, single engine Rothacker Aviation LLC
Wilmington, Delaware
Standard 2022-02-25 ValidFAA registration status code V: Valid registration. All codes
N581BV Beech
F33A
Fixed-wing, single engine Co-owned owner
Texas
Standard 2022-02-25 ValidFAA registration status code V: Valid registration. All codes
N8233J Beech
F33A
Fixed-wing, single engine Munstead Hollow Farm LLC
Downington, Pennsylvania
Standard 2022-02-25 ValidFAA registration status code V: Valid registration. All codes
N2030K Beech
A36
Fixed-wing, single engine Individual owner
Georgia
Standard 2022-02-24 ValidFAA registration status code V: Valid registration. All codes
N2643Y Cessna
310R
Fixed-wing, multi-engine Company Plane LLC
Wisconsin Rapids, Wisconsin
Standard 2022-02-24 ValidFAA registration status code V: Valid registration. All codes
N368JE Beech
58
Fixed-wing, multi-engine Jones Enterprises
Nacogdoches, Texas
Standard 2022-02-24 ValidFAA registration status code V: Valid registration. All codes
N3868U Beech
V35B
Fixed-wing, single engine Withheld at owner's request
Standard 2022-02-24 ValidFAA registration status code V: Valid registration. All codes
N4905U Cessna
210E
Fixed-wing, single engine Performance AG Indiana
Frankfort, Indiana
Standard 2022-02-24 ValidFAA registration status code V: Valid registration. All codes
N2513X Cessna
P206
Fixed-wing, single engine Individual owner
North Dakota
Standard 2022-02-23 ValidFAA registration status code V: Valid registration. All codes
N185DM Cessna
A185F
Fixed-wing, single engine Co-owned owner
Arizona
Standard 2022-02-22 ValidFAA registration status code V: Valid registration. All codes
N24BF Beech
A36
Fixed-wing, single engine Wright Aviation INC
Pikeville, Kentucky
Standard 2022-02-22 ValidFAA registration status code V: Valid registration. All codes
N25625 Beech
A36
Fixed-wing, single engine Individual owner
California
Standard 2022-02-19 ValidFAA registration status code V: Valid registration. All codes
N2902T Aero Commander
200D
Fixed-wing, single engine Individual owner
Florida
Standard 2022-02-19 ValidFAA registration status code V: Valid registration. All codes
N328B Beech
V35
Fixed-wing, single engine Nothing Wasted LLC
Bunker Hill, Indiana
Standard 2022-02-19 ValidFAA registration status code V: Valid registration. All codes
N61TT Beech
F33A
Fixed-wing, single engine Gilbert Greg P
Bend, Oregon
Standard 2022-02-19 ValidFAA registration status code V: Valid registration. All codes
N9260Q Beech
F33A
Fixed-wing, single engine Individual owner
California
Standard 2022-02-19 ValidFAA registration status code V: Valid registration. All codes
N4874Q Cessna
A185F
Fixed-wing, single engine Sutton Aircraft Salvage LLC
Palmer, Alaska
Standard 2022-02-18 ValidFAA registration status code V: Valid registration. All codes
N5110U Cessna
206
Fixed-wing, single engine Co-owned owner
Alaska
Standard 2022-02-18 ValidFAA registration status code V: Valid registration. All codes
N9233Q Beech
V35B
Fixed-wing, single engine Mid America Aviation LLC
Wilmington, Delaware
Standard 2022-02-18 ValidFAA registration status code V: Valid registration. All codes
N23822 Beech
A36
Fixed-wing, single engine Individual owner
Florida
Standard 2022-02-17 ValidFAA registration status code V: Valid registration. All codes
N333X Beech
95-C55
Fixed-wing, multi-engine Jpg Aviation LLC
Wilmington, Delaware
Standard 2022-02-17 ValidFAA registration status code V: Valid registration. All codes
N7740R Beech
V35A
Fixed-wing, single engine Withheld at owner's request
Standard 2022-02-17 ValidFAA registration status code V: Valid registration. All codes
N2015V Beech
K35
Fixed-wing, single engine Individual owner
California
Experimental 2022-02-16 ValidFAA registration status code V: Valid registration. All codes
N8583R Beech
F33A
Fixed-wing, single engine Fresa Oro INC
Carlsbad, California
Standard 2022-02-16 ValidFAA registration status code V: Valid registration. All codes
N23674 Beech
V35B
Fixed-wing, single engine Co-owned owner
California
Standard 2022-02-15 ValidFAA registration status code V: Valid registration. All codes
N3349A Beech
F33A
Fixed-wing, single engine Individual owner
Minnesota
Standard 2022-02-15 ValidFAA registration status code V: Valid registration. All codes
N53252 Cessna
310R
Fixed-wing, multi-engine Co-owned owner
Georgia
Standard 2022-02-15 ValidFAA registration status code V: Valid registration. All codes
N6617N Beech
58
Fixed-wing, multi-engine Individual owner
Idaho
Standard 2022-02-15 ValidFAA registration status code V: Valid registration. All codes
N407T Beech
95-C55
Fixed-wing, multi-engine Volunteer Aerials LLC
Stanley, North Carolina
Standard 2022-02-14 ValidFAA registration status code V: Valid registration. All codes
N6075S Beech
A36
Fixed-wing, single engine Individual owner
Texas
Standard 2022-02-12 ValidFAA registration status code V: Valid registration. All codes
N9086S Beech
F33A
Fixed-wing, single engine Kats Ventures LLC
Byron, Minnesota
Standard 2022-02-12 ValidFAA registration status code V: Valid registration. All codes
N9371Q Beech
V35B
Fixed-wing, single engine Ashe Industries LLC
Murrieta, California
Standard 2022-02-12 ValidFAA registration status code V: Valid registration. All codes
N4358Q Cessna
A185F
Fixed-wing, single engine Individual owner
Alaska
Standard 2022-02-11 ValidFAA registration status code V: Valid registration. All codes
N4977U Cessna
210E
Fixed-wing, single engine Individual owner
California
Standard 2022-02-10 ValidFAA registration status code V: Valid registration. All codes
N24CS Bellanca
17-30A
Fixed-wing, single engine Individual owner
Minnesota
Standard 2022-02-09 ValidFAA registration status code V: Valid registration. All codes
N3194C Beech
V35
Fixed-wing, single engine Individual owner
North Carolina
Standard 2022-02-09 ValidFAA registration status code V: Valid registration. All codes
N66916 Beech
V35B
Fixed-wing, single engine Technet Aviation LLC
Charlotte, Michigan
Standard 2022-02-08 ValidFAA registration status code V: Valid registration. All codes
N7358B Beech
58
Fixed-wing, multi-engine Hinkle Aviation LLC
Moro, Arkansas
Standard 2022-02-08 ValidFAA registration status code V: Valid registration. All codes
N90EB Beech
58
Fixed-wing, multi-engine Jet Set Aircraft INC
Van Nuys, California
Standard 2022-02-08 ValidFAA registration status code V: Valid registration. All codes
N185RR Cessna
A185F
Fixed-wing, single engine Air Flite INC
Shawnee, Oklahoma
Standard 2022-02-04 ValidFAA registration status code V: Valid registration. All codes
Previous Page 33 of 95 Next

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.