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
N1083W Beech
58
Fixed-wing, multi-engine Aeolus Aircraft LLC
Seminole, Oklahoma
Standard 2021-09-16 ValidFAA registration status code V: Valid registration. All codes
N307GR Cessna
A185F
Fixed-wing, single engine J & D Flying LLC
Sand Point, Alaska
Standard 2021-09-16 ValidFAA registration status code V: Valid registration. All codes
N48MH Beech
V35B
Fixed-wing, single engine Seventh North Hangar LLC
Bolton, Massachusetts
Standard 2021-09-16 ValidFAA registration status code V: Valid registration. All codes
N8734Z Cessna
P206D
Fixed-wing, single engine Individual owner
California
Standard 2021-09-16 ValidFAA registration status code V: Valid registration. All codes
N2983T Aero Commander
200D
Fixed-wing, single engine Individual owner
Idaho
Standard 2021-09-15 ValidFAA registration status code V: Valid registration. All codes
N2039V Beech
A36
Fixed-wing, single engine Individual owner
Florida
Standard 2021-09-14 ValidFAA registration status code V: Valid registration. All codes
N925T Beech
S35
Fixed-wing, single engine Preserve Land Company LLC
Franklin Lakes, New Jersey
Standard 2021-09-14 ValidFAA registration status code V: Valid registration. All codes
N217Q Beech
S35
Fixed-wing, single engine Lasc Aviation INC
Callaway, Florida
Standard 2021-09-13 ValidFAA registration status code V: Valid registration. All codes
N28022 Bellanca
17-30A
Fixed-wing, single engine Individual owner
District of Columbia
Standard 2021-09-11 ValidFAA registration status code V: Valid registration. All codes
N5840K Beech
S35
Fixed-wing, single engine Frogmore V-Tail LLC
Beaufort, South Carolina
Standard 2021-09-11 ValidFAA registration status code V: Valid registration. All codes
N6646V Bellanca
17-30A
Fixed-wing, single engine Individual owner
Indiana
Standard 2021-09-11 ValidFAA registration status code V: Valid registration. All codes
N301P Beech
58
Fixed-wing, multi-engine Individual owner
Texas
Standard 2021-09-09 ValidFAA registration status code V: Valid registration. All codes
N589C Beech
F33A
Fixed-wing, single engine Springville Flying Club
Spanish Fork, Utah
Standard 2021-09-09 ValidFAA registration status code V: Valid registration. All codes
N181AC Beech
F33A
Fixed-wing, single engine Two Tall Tamaracks LLC
Ovando, Montana
Standard 2021-09-08 ValidFAA registration status code V: Valid registration. All codes
N2241T Cessna
A185E
Fixed-wing, single engine Individual owner
Alaska
Standard 2021-09-08 ValidFAA registration status code V: Valid registration. All codes
N727P Beech
F33A
Fixed-wing, single engine Leading Edge Flight Academy LLC
Bend, Oregon
Standard 2021-09-08 ValidFAA registration status code V: Valid registration. All codes
N135CE Beech
F33A
Fixed-wing, single engine Bell Strategic Investments INC
Escondido, California
Standard 2021-09-02 ValidFAA registration status code V: Valid registration. All codes
N389MC Beech
V35B
Fixed-wing, single engine Co-owned owner
Washington
Standard 2021-09-02 ValidFAA registration status code V: Valid registration. All codes
N732K Cessna
A185F
Fixed-wing, single engine United States Department of the Interior
Boise, Idaho
Standard 2021-09-02 ValidFAA registration status code V: Valid registration. All codes
N185PX Cessna
A185F
Fixed-wing, single engine Individual owner
California
Standard 2021-08-31 ValidFAA registration status code V: Valid registration. All codes
N2044W Beech
A36
Fixed-wing, single engine Individual owner
Vermont
Standard 2021-08-30 ValidFAA registration status code V: Valid registration. All codes
N288SV Bellanca
17-30A
Fixed-wing, single engine Individual owner
Missouri
Standard 2021-08-30 ValidFAA registration status code V: Valid registration. All codes
N3304Q Cessna
320D
Fixed-wing, multi-engine Individual owner
California
Standard 2021-08-30 ValidFAA registration status code V: Valid registration. All codes
N4994R Cessna
A188B
Fixed-wing, single engine Country Air Service INC
Hecla, South Dakota
Restricted 2021-08-30 ValidFAA registration status code V: Valid registration. All codes
N6298U Beech
F33A
Fixed-wing, single engine Red Roadrunner LLC
Richmond, Kentucky
Standard 2021-08-27 ValidFAA registration status code V: Valid registration. All codes
N661KB Cessna
210L
Fixed-wing, single engine Individual owner
New York
Standard 2021-08-27 ValidFAA registration status code V: Valid registration. All codes
N17836 Beech
A36
Fixed-wing, single engine Individual owner
Ohio
Standard 2021-08-26 ValidFAA registration status code V: Valid registration. All codes
N8812V Bellanca
17-30A
Fixed-wing, single engine Individual owner
Ohio
Standard 2021-08-26 ValidFAA registration status code V: Valid registration. All codes
N1520V Beech
V35
Fixed-wing, single engine Individual owner
Delaware
Standard 2021-08-25 ValidFAA registration status code V: Valid registration. All codes
N39882 Bellanca
17-30A
Fixed-wing, single engine Individual owner
Iowa
Standard 2021-08-25 ValidFAA registration status code V: Valid registration. All codes
N6167N Cessna
A185F
Fixed-wing, single engine Millhorn Farms INC
Worley, Idaho
Standard 2021-08-25 ValidFAA registration status code V: Valid registration. All codes
N9563H Cessna
A185F
Fixed-wing, single engine Individual owner
Alaska
Standard 2021-08-25 ValidFAA registration status code V: Valid registration. All codes
N34SC Beech
58
Fixed-wing, multi-engine Tbhb Logistics LLC
Amarillo, Texas
Standard 2021-08-24 ValidFAA registration status code V: Valid registration. All codes
N5902F Cessna
210G
Fixed-wing, single engine Individual owner
Illinois
Standard 2021-08-24 ValidFAA registration status code V: Valid registration. All codes
N76VC Beech
58
Fixed-wing, multi-engine Bel Air Holdings INC
Wilmington, Delaware
Standard 2021-08-24 ValidFAA registration status code V: Valid registration. All codes
N8281R Bellanca
17-30A
Fixed-wing, single engine Individual owner
Washington
Standard 2021-08-24 ValidFAA registration status code V: Valid registration. All codes
N9420R Cessna
U206G
Fixed-wing, single engine Individual owner
Alaska
Standard 2021-08-24 ValidFAA registration status code V: Valid registration. All codes
N3082K Beech
F33A
Fixed-wing, single engine Tecair INC
Ventura, California
Standard 2021-08-23 ValidFAA registration status code V: Valid registration. All codes
N329JH Beech
A36
Fixed-wing, single engine Alliance Aircraft Sales INC
Pierre, South Dakota
Standard 2021-08-23 ValidFAA registration status code V: Valid registration. All codes
N4969U Cessna
210E
Fixed-wing, single engine Tallgrass Aviation LLC
Sharon Springs, Kansas
Standard 2021-08-23 ValidFAA registration status code V: Valid registration. All codes
N7946K Beech
S35
Fixed-wing, single engine Co-owned owner
California
Standard 2021-08-23 ValidFAA registration status code V: Valid registration. All codes
N8491N Beech
D55
Fixed-wing, multi-engine Marius Aviation LLC
Northport, Alabama
Standard 2021-08-23 ValidFAA registration status code V: Valid registration. All codes
N45EE Beech
58
Fixed-wing, multi-engine Co-owned owner
Massachusetts
Standard 2021-08-21 ValidFAA registration status code V: Valid registration. All codes
N4931C Cessna
A185F
Fixed-wing, single engine Einstein INC
Price, Utah
Standard 2021-08-21 ValidFAA registration status code V: Valid registration. All codes
N9044V Beech
58
Fixed-wing, multi-engine Individual owner
Florida
Standard 2021-08-21 ValidFAA registration status code V: Valid registration. All codes
N9412M Cessna
210K
Fixed-wing, single engine Fly-N-High LLC
Riverton, Wyoming
Standard 2021-08-21 ValidFAA registration status code V: Valid registration. All codes
N185LT Cessna
A185F
Fixed-wing, single engine Individual owner
Oregon
Standard 2021-08-20 ValidFAA registration status code V: Valid registration. All codes
N8722Q Cessna
A185F
Fixed-wing, single engine Individual owner
Oregon
Standard 2021-08-20 ValidFAA registration status code V: Valid registration. All codes
N224HP Beech
S35
Fixed-wing, single engine Individual owner
California
Standard 2021-08-19 ValidFAA registration status code V: Valid registration. All codes
N2583X Cessna
P206
Fixed-wing, single engine N2583X LLC
Oklahoma City, Oklahoma
Standard 2021-08-19 ValidFAA registration status code V: Valid registration. All codes
N531H Cessna
A185E
Fixed-wing, single engine Acadian Aircraft Leasing LLC
Rangeley, Maine
Standard 2021-08-19 ValidFAA registration status code V: Valid registration. All codes
N711NC Beech
V35B
Fixed-wing, single engine Hussey Aviation LLC
Clear Lake, Iowa
Standard 2021-08-19 ValidFAA registration status code V: Valid registration. All codes
N185SF Cessna
A185F
Fixed-wing, single engine Upside Down Aero LLC
Aberdeen, Idaho
Standard 2021-08-18 ValidFAA registration status code V: Valid registration. All codes
N2553T Navion
NAVION H
Fixed-wing, single engine Individual owner
Illinois
Standard 2021-08-18 ValidFAA registration status code V: Valid registration. All codes
N25J Beech
F33A
Fixed-wing, single engine Co-owned owner
California
Standard 2021-08-18 ValidFAA registration status code V: Valid registration. All codes
N40AB Beech
F33A
Fixed-wing, single engine Individual owner
Arkansas
Standard 2021-08-18 ValidFAA registration status code V: Valid registration. All codes
N11JB Beech
V35B
Fixed-wing, single engine Flight Risk Ventures LLC
Missoula, Montana
Standard 2021-08-17 ValidFAA registration status code V: Valid registration. All codes
N28028 Bellanca
17-30A
Fixed-wing, single engine Mitzoom Enterprises LLC
Minneapolis, Minnesota
Standard 2021-08-16 ValidFAA registration status code V: Valid registration. All codes
N30ED Beech
V35B
Fixed-wing, single engine N30Ed LLC
Carpinteria, California
Standard 2021-08-16 ValidFAA registration status code V: Valid registration. All codes
N7527N Beech
36
Fixed-wing, single engine Paradise Prop LLC
Cedarburg, Wisconsin
Standard 2021-08-16 ValidFAA registration status code V: Valid registration. All codes
N3944Y Cessna
210D
Fixed-wing, single engine Brown Pelican Aviation LLC
Ralston, Nebraska
Standard 2021-08-14 ValidFAA registration status code V: Valid registration. All codes
N977V Beech
95-C55
Fixed-wing, multi-engine Individual owner
Indiana
Standard 2021-08-14 ValidFAA registration status code V: Valid registration. All codes
N24WW Cessna
210L
Fixed-wing, single engine Park Avenue Group INC
Stuart, Florida
Standard 2021-08-13 ValidFAA registration status code V: Valid registration. All codes
N5799J Cessna
210K
Fixed-wing, single engine Britt Demolition and Recycling INC
Hanceville, Alabama
Standard 2021-08-13 ValidFAA registration status code V: Valid registration. All codes
N111AL Beech
58
Fixed-wing, multi-engine Bc Builders INC
Temecula, California
Standard 2021-08-12 ValidFAA registration status code V: Valid registration. All codes
N244HE Cessna
210H
Fixed-wing, single engine Individual owner
Arizona
Standard 2021-08-12 ValidFAA registration status code V: Valid registration. All codes
N60ML Beech
V35B
Fixed-wing, single engine Individual owner
Texas
Standard 2021-08-12 ValidFAA registration status code V: Valid registration. All codes
N7525N Beech
36
Fixed-wing, single engine Fityfityink LLC
Troy, Ohio
Standard 2021-08-12 ValidFAA registration status code V: Valid registration. All codes
N93202 Cessna
A185F
Fixed-wing, single engine Nature State LLC
Portland, Oregon
Standard 2021-08-12 ValidFAA registration status code V: Valid registration. All codes
N4354R Cessna
A185F
Fixed-wing, single engine Co-owned owner
Colorado
Standard 2021-08-11 ValidFAA registration status code V: Valid registration. All codes
N210ZP Cessna
210L
Fixed-wing, single engine Thaggard Aviation LLC
Leesburg, Georgia
Standard 2021-08-10 ValidFAA registration status code V: Valid registration. All codes
N387JK Beech
A36
Fixed-wing, single engine Individual owner
Texas
Standard 2021-08-10 ValidFAA registration status code V: Valid registration. All codes
N4988F Cessna
U206B
Fixed-wing, single engine Co-owned owner
Alaska
Standard 2021-08-10 ValidFAA registration status code V: Valid registration. All codes
N625M Beech
58
Fixed-wing, multi-engine Co-owned owner
Michigan
Standard 2021-08-10 ValidFAA registration status code V: Valid registration. All codes
N8204M Beech
A36
Fixed-wing, single engine Blue Sky Flying Club LLC
Granger, Iowa
Standard 2021-08-10 ValidFAA registration status code V: Valid registration. All codes
N8686Q Cessna
U206F
Fixed-wing, single engine Waters & Associates INC
Bellaire, Texas
Standard 2021-08-10 ValidFAA registration status code V: Valid registration. All codes
N3113N Beech
F33A
Fixed-wing, single engine Individual owner
Washington
Standard 2021-08-09 ValidFAA registration status code V: Valid registration. All codes
N3927Y Cessna
210D
Fixed-wing, single engine Co-owned owner
Texas
Standard 2021-08-09 ValidFAA registration status code V: Valid registration. All codes
N74JS Cessna
A185F
Fixed-wing, single engine Hoots Husky LLC
Helena, Montana
Standard 2021-08-09 ValidFAA registration status code V: Valid registration. All codes
N3961Y Cessna
210D
Fixed-wing, single engine Individual owner
Kansas
Standard 2021-08-07 ValidFAA registration status code V: Valid registration. All codes
N9551E Bellanca
17-30A
Fixed-wing, single engine Co-owned owner
Maryland
Standard 2021-08-07 ValidFAA registration status code V: Valid registration. All codes
N177AB Beech
E-55
Fixed-wing, multi-engine Individual owner
Arizona
Standard 2021-08-05 ValidFAA registration status code V: Valid registration. All codes
N570E Cessna
310R
Fixed-wing, multi-engine K & D Air LLC
Morgan City, Louisiana
Standard 2021-08-05 ValidFAA registration status code V: Valid registration. All codes
N670GC Beech
58
Fixed-wing, multi-engine Individual owner
Nevada
Standard 2021-08-05 ValidFAA registration status code V: Valid registration. All codes
N8131N Beech
F33A
Fixed-wing, single engine Individual owner
New Jersey
Standard 2021-08-05 ValidFAA registration status code V: Valid registration. All codes
N2568X Cessna
P206
Fixed-wing, single engine Co-owned owner
Idaho
Standard 2021-08-04 ValidFAA registration status code V: Valid registration. All codes
N7894R Beech
V35A
Fixed-wing, single engine Individual owner
Illinois
Standard 2021-08-04 ValidFAA registration status code V: Valid registration. All codes
N210WV Cessna
210M
Fixed-wing, single engine Hiservant Ministries INC
Mont Belvieu, Texas
Standard 2021-08-03 ValidFAA registration status code V: Valid registration. All codes
N6706R Cessna
T210F
Fixed-wing, single engine Individual owner
Wisconsin
Standard 2021-08-03 ValidFAA registration status code V: Valid registration. All codes
N921MJ Beech
F33A
Fixed-wing, single engine Individual owner
Texas
Standard 2021-08-03 ValidFAA registration status code V: Valid registration. All codes
N707T Beech
A36
Fixed-wing, single engine Individual owner
Ohio
Standard 2021-08-02 ValidFAA registration status code V: Valid registration. All codes
N3881Y Cessna
210D
Fixed-wing, single engine Individual owner
Virginia
Standard 2021-07-31 ValidFAA registration status code V: Valid registration. All codes
N78BE Beech
A36
Fixed-wing, single engine Happy Planes LLC
Boyertown, Pennsylvania
Standard 2021-07-31 ValidFAA registration status code V: Valid registration. All codes
N161KC Beech
A36
Fixed-wing, single engine Ck Aviation LLC
Melbourne, Arkansas
Standard 2021-07-30 ValidFAA registration status code V: Valid registration. All codes
N1863F Cessna
210F
Fixed-wing, single engine Individual owner
Oregon
Standard 2021-07-30 ValidFAA registration status code V: Valid registration. All codes
N22BY Beech
S35
Fixed-wing, single engine Delton LLC
Pembroke Pines, Florida
Standard 2021-07-30 ValidFAA registration status code V: Valid registration. All codes
N9422S Beech
V35
Fixed-wing, single engine Windwalker Adventures LLC
Scottsdale, Arizona
Standard 2021-07-30 ValidFAA registration status code V: Valid registration. All codes
N117KA Beech
E-55
Fixed-wing, multi-engine Southern Latitude LLC
Alabaster, Alabama
Standard 2021-07-29 ValidFAA registration status code V: Valid registration. All codes
N43Y Beech
A36
Fixed-wing, single engine Individual owner
Texas
Standard 2021-07-29 ValidFAA registration status code V: Valid registration. All codes
N33SC Bellanca
17-30A
Fixed-wing, single engine Withheld at owner's request
Standard 2021-07-28 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.