The U.S. aircraft register, updated daily
Engines · piston (reciprocating) · data as of October 8, 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

The whole map of how records connect · these connections as data: /graph/engine/continental-io-520-series.json.

Aircraft newest certificates first · 9,484

Tail no.Maker and modelGroupOwner and baseCertificateRegisteredStatus
N7340U Cessna
207A
Fixed-wing, single engine Yr-Aircraft Leasing LLC
Bethel, Alaska
Standard 2020-10-01 ValidFAA registration status code V: Valid registration. All codes
N7373U Cessna
207A
Fixed-wing, single engine Yr-Aircraft Leasing LLC
Bethel, Alaska
Standard 2020-10-01 ValidFAA registration status code V: Valid registration. All codes
N7389U Cessna
207A
Fixed-wing, single engine Yr-Aircraft Leasing LLC
Bethel, Alaska
Standard 2020-10-01 ValidFAA registration status code V: Valid registration. All codes
N91002 Cessna
207
Fixed-wing, single engine Yr-Aircraft Leasing LLC
Bethel, Alaska
Standard 2020-10-01 ValidFAA registration status code V: Valid registration. All codes
N916AC Cessna
207
Fixed-wing, single engine Yr-Aircraft Leasing LLC
Bethel, Alaska
Standard 2020-10-01 ValidFAA registration status code V: Valid registration. All codes
N3332S Cessna
A185F
Fixed-wing, single engine Individual owner
Alaska
Standard 2020-09-29 ValidFAA registration status code V: Valid registration. All codes
N406NW Cessna
A185F
Fixed-wing, single engine Johnson Aeronautics LLC
Billings, Montana
Standard 2020-09-29 ValidFAA registration status code V: Valid registration. All codes
N300AB Beech
V35
Fixed-wing, single engine Delaware Aircraft Trust LLC Trustee
New Castle, Delaware
Standard 2020-09-28 ValidFAA registration status code V: Valid registration. All codes
N686FR Beech
58
Fixed-wing, multi-engine Von Syke Orchards LLC
Anderson, South Carolina
Standard 2020-09-28 ValidFAA registration status code V: Valid registration. All codes
N33196 Cessna
U206F
Fixed-wing, single engine One Niner Six Aviation LLC
Anchorage, Alaska
Standard 2020-09-24 ValidFAA registration status code V: Valid registration. All codes
N7149N Beech
V35A
Fixed-wing, single engine Individual owner
Pennsylvania
Standard 2020-09-24 ValidFAA registration status code V: Valid registration. All codes
N6932R Cessna
T210H
Fixed-wing, single engine Boxwell Avionics
Green Cove Springs, Florida
Standard 2020-09-23 ValidFAA registration status code V: Valid registration. All codes
N73BJ Cessna
A185F
Fixed-wing, single engine Individual owner
Colorado
Restricted 2020-09-22 ValidFAA registration status code V: Valid registration. All codes
N9312X Cessna
182E
Fixed-wing, single engine Individual owner
Illinois
Multiple 2020-09-22 ValidFAA registration status code V: Valid registration. All codes
N121CE Cessna
210L
Fixed-wing, single engine Advanced Flight Instruction LLC
Greenwood, Delaware
Standard 2020-09-21 ValidFAA registration status code V: Valid registration. All codes
N185NU Cessna
A185E
Fixed-wing, single engine Individual owner
District of Columbia
Standard 2020-09-21 ValidFAA registration status code V: Valid registration. All codes
N7141N Beech
V35A
Fixed-wing, single engine Individual owner
Florida
Standard 2020-09-21 ValidFAA registration status code V: Valid registration. All codes
N1592L Beech
A36
Fixed-wing, single engine Lwcr Transportation INC
Minot, North Dakota
Standard 2020-09-18 ValidFAA registration status code V: Valid registration. All codes
N2170S Cessna
210L
Fixed-wing, single engine Aboveallphoto.Com INC
Indianapolis, Indiana
Standard 2020-09-18 ValidFAA registration status code V: Valid registration. All codes
N33VE Cessna
A185F
Fixed-wing, single engine Co-owned owner
Alaska
Multiple 2020-09-17 ValidFAA registration status code V: Valid registration. All codes
N6019F Beech
S35
Fixed-wing, single engine Flying R LLC
Apison, Tennessee
Standard 2020-09-16 ValidFAA registration status code V: Valid registration. All codes
N3675R Beech
A36
Fixed-wing, single engine Cl1 LLC
Baton Rouge, Louisiana
Standard 2020-09-15 ValidFAA registration status code V: Valid registration. All codes
N3989Y Cessna
210D
Fixed-wing, single engine Individual owner
Texas
Standard 2020-09-15 ValidFAA registration status code V: Valid registration. All codes
N52MB Beech
95-C55
Fixed-wing, multi-engine Individual owner
Oklahoma
Standard 2020-09-15 ValidFAA registration status code V: Valid registration. All codes
N544M Beech
35-C33A
Fixed-wing, single engine Trim Tab LLC
Fort Collins, Colorado
Standard 2020-09-15 ValidFAA registration status code V: Valid registration. All codes
N6747Y Beech
A36
Fixed-wing, single engine Z2B Aviation LLC
San Antonio, Texas
Standard 2020-09-15 ValidFAA registration status code V: Valid registration. All codes
N18327 Beech
A36
Fixed-wing, single engine Individual owner
California
Standard 2020-09-14 ValidFAA registration status code V: Valid registration. All codes
N24RC Beech
E-55
Fixed-wing, multi-engine Individual owner
Missouri
Standard 2020-09-14 ValidFAA registration status code V: Valid registration. All codes
N3664Y Beech
A36
Fixed-wing, single engine Windswept Aviation LLC
North Canton, Ohio
Standard 2020-09-14 ValidFAA registration status code V: Valid registration. All codes
N917TR Beech
58
Fixed-wing, multi-engine Try Trying Management and Promotions LLC
Indianapolis, Indiana
Standard 2020-09-11 ValidFAA registration status code V: Valid registration. All codes
N134D Beech
A45
Fixed-wing, single engine Vac Sys Holdings LLC
Roseville, California
Standard 2020-09-10 ValidFAA registration status code V: Valid registration. All codes
N2724T Beech
95-C55
Fixed-wing, multi-engine Individual owner
Pennsylvania
Standard 2020-09-09 ValidFAA registration status code V: Valid registration. All codes
N407RS Beech
58
Fixed-wing, multi-engine Individual owner
Missouri
Standard 2020-09-09 ValidFAA registration status code V: Valid registration. All codes
N4702V Bellanca
17-30
Fixed-wing, single engine Co-owned owner
California
Standard 2020-09-09 ValidFAA registration status code V: Valid registration. All codes
N4714V Bellanca
17-30
Fixed-wing, single engine Individual owner
Oregon
Standard 2020-09-09 ValidFAA registration status code V: Valid registration. All codes
N6100V Beech
S35
Fixed-wing, single engine Individual owner
Oregon
Standard 2020-09-09 ValidFAA registration status code V: Valid registration. All codes
N7659N Beech
36
Fixed-wing, single engine Pintail Investment Properties LLC
New Bern, North Carolina
Standard 2020-09-09 ValidFAA registration status code V: Valid registration. All codes
N728V Beech
A36
Fixed-wing, single engine Aero Research LLC
Kalispell, Montana
Standard 2020-09-04 ValidFAA registration status code V: Valid registration. All codes
N8216R Bellanca
17-30A
Fixed-wing, single engine Individual owner
Kansas
Standard 2020-09-04 ValidFAA registration status code V: Valid registration. All codes
N3VY Beech
D-45
Fixed-wing, single engine Individual owner
New Jersey
Standard 2020-09-02 ValidFAA registration status code V: Valid registration. All codes
N6025T Beech
V35B
Fixed-wing, single engine Vtales LLC
Urbana, Illinois
Standard 2020-09-02 ValidFAA registration status code V: Valid registration. All codes
N6671D Beech
A36
Fixed-wing, single engine Individual owner
Oklahoma
Standard 2020-09-02 ValidFAA registration status code V: Valid registration. All codes
N9750C Beech
V35B
Fixed-wing, single engine Jv Aviation LLC
Johnston, Rhode Island
Standard 2020-09-02 ValidFAA registration status code V: Valid registration. All codes
N432DL Beech
58
Fixed-wing, multi-engine Individual owner
Maryland
Standard 2020-08-31 ValidFAA registration status code V: Valid registration. All codes
N99RF Beech
58
Fixed-wing, multi-engine Echo Bravo Aviation LLC
Nashville, Tennessee
Standard 2020-08-31 ValidFAA registration status code V: Valid registration. All codes
N5655N Beech
F33A
Fixed-wing, single engine Wiley Aviation LLC
Saint Augustine, Florida
Standard 2020-08-29 ValidFAA registration status code V: Valid registration. All codes
N4894J Beech
V35
Fixed-wing, single engine Capri Blue Aviation LLC
Norcross, Georgia
Standard 2020-08-28 ValidFAA registration status code V: Valid registration. All codes
N1052F Cessna
A185F
Fixed-wing, single engine Glb Farms INC
Pasco, Washington
Standard 2020-08-27 ValidFAA registration status code V: Valid registration. All codes
N10AA Cessna
320E
Fixed-wing, multi-engine Individual owner
Kentucky
Standard 2020-08-27 ValidFAA registration status code V: Valid registration. All codes
N135FB Beech
58
Fixed-wing, multi-engine Sky West Aviation INC Trustee
Albuquerque, New Mexico
Standard 2020-08-27 ValidFAA registration status code V: Valid registration. All codes
N72311 Beech
F33A
Fixed-wing, single engine Qualitair LLC Trustee
Michelstadt,
Standard 2020-08-27 ValidFAA registration status code V: Valid registration. All codes
N58KE Beech
58
Fixed-wing, multi-engine Racego CORP
San Juan, Puerto Rico
Standard 2020-08-26 ValidFAA registration status code V: Valid registration. All codes
N38FG Cessna
A185F
Fixed-wing, single engine Individual owner
Alaska
Standard 2020-08-25 ValidFAA registration status code V: Valid registration. All codes
N6243V Beech
V35
Fixed-wing, single engine Co-owned owner
North Carolina
Standard 2020-08-25 ValidFAA registration status code V: Valid registration. All codes
N7251R Beech
F33A
Fixed-wing, single engine Co-owned owner
Connecticut
Standard 2020-08-25 ValidFAA registration status code V: Valid registration. All codes
N7958R Beech
D55
Fixed-wing, multi-engine Individual owner
Illinois
Standard 2020-08-22 ValidFAA registration status code V: Valid registration. All codes
N301JF Beech
A36
Fixed-wing, single engine Individual owner
Georgia
Standard 2020-08-21 ValidFAA registration status code V: Valid registration. All codes
N507DG Cessna
U206G
Fixed-wing, single engine Individual owner
Alaska
Standard 2020-08-21 ValidFAA registration status code V: Valid registration. All codes
N3680U Beech
A36
Fixed-wing, single engine Co-owned owner
Florida
Standard 2020-08-20 ValidFAA registration status code V: Valid registration. All codes
N5585K Beech
F33A
Fixed-wing, single engine Macias Aviation LLC
Canadian, Texas
Standard 2020-08-20 ValidFAA registration status code V: Valid registration. All codes
N7157N Beech
V35A
Fixed-wing, single engine Co-owned owner
North Carolina
Standard 2020-08-20 ValidFAA registration status code V: Valid registration. All codes
N789RP Cessna
421C
Fixed-wing, multi-engine Brindle Concepts LLC
Hanover, Pennsylvania
Standard 2020-08-20 ValidFAA registration status code V: Valid registration. All codes
N7MW Beech
58
Fixed-wing, multi-engine Seven Aces LLC
Chesterfield, New Jersey
Standard 2020-08-19 ValidFAA registration status code V: Valid registration. All codes
N830SU Beech
E-55
Fixed-wing, multi-engine Individual owner
Oklahoma
Standard 2020-08-19 ValidFAA registration status code V: Valid registration. All codes
N9620G Cessna
A188B
Fixed-wing, single engine Individual owner
Montana
Restricted 2020-08-19 ValidFAA registration status code V: Valid registration. All codes
N222FN Beech
F33A
Fixed-wing, single engine Withheld at owner's request
Standard 2020-08-18 ValidFAA registration status code V: Valid registration. All codes
N5835K Beech
S35
Fixed-wing, single engine Individual owner
South Dakota
Standard 2020-08-18 ValidFAA registration status code V: Valid registration. All codes
N8389N Beech
V35A
Fixed-wing, single engine Sav Aviation LLC
Jacksonville, Texas
Standard 2020-08-18 ValidFAA registration status code V: Valid registration. All codes
N2797A Beech
V35A
Fixed-wing, single engine Blue Line Aviation LLC
Vidalia, Georgia
Standard 2020-08-17 ValidFAA registration status code V: Valid registration. All codes
N3929Y Cessna
210D
Fixed-wing, single engine Individual owner
New Mexico
Standard 2020-08-17 ValidFAA registration status code V: Valid registration. All codes
N61441 Cessna
A185F
Fixed-wing, single engine Individual owner
Alaska
Standard 2020-08-17 ValidFAA registration status code V: Valid registration. All codes
N80391 Cessna
A185F
Fixed-wing, single engine Individual owner
Utah
Standard 2020-08-17 ValidFAA registration status code V: Valid registration. All codes
N25RX Beech
E-55
Fixed-wing, multi-engine Olde Same Place LLC
Thiensville, Wisconsin
Standard 2020-08-15 ValidFAA registration status code V: Valid registration. All codes
N4532S Beech
F33A
Fixed-wing, single engine Elite Aviation Partners LLC
Blacklick, Ohio
Standard 2020-08-15 ValidFAA registration status code V: Valid registration. All codes
N4892V Bellanca
17-30
Fixed-wing, single engine Individual owner
New Mexico
Standard 2020-08-15 ValidFAA registration status code V: Valid registration. All codes
N364EM Beech
36
Fixed-wing, single engine Safeco Leasing LLC
Port Alsworth, Alaska
Standard 2020-08-14 ValidFAA registration status code V: Valid registration. All codes
N59164 Cessna
U206F
Fixed-wing, single engine Marine Electrical & Refrigeration of Kodiak LLC
Kodiak, Alaska
Standard 2020-08-14 ValidFAA registration status code V: Valid registration. All codes
N601UJ Beech
V35
Fixed-wing, single engine Individual owner
North Carolina
Standard 2020-08-14 ValidFAA registration status code V: Valid registration. All codes
N1077F Cessna
A185F
Fixed-wing, single engine Individual owner
Georgia
Standard 2020-08-13 ValidFAA registration status code V: Valid registration. All codes
N18284 Beech
A36
Fixed-wing, single engine Condor Aviation LLC
Bethlehem, Pennsylvania
Standard 2020-08-13 ValidFAA registration status code V: Valid registration. All codes
N1LV Beech
35-C33A
Fixed-wing, single engine Individual owner
Maryland
Standard 2020-08-12 ValidFAA registration status code V: Valid registration. All codes
N7607N Beech
36
Fixed-wing, single engine Bonn Aire LLC
Henderson, Nevada
Standard 2020-08-12 ValidFAA registration status code V: Valid registration. All codes
N950Q Beech
35-B33
Fixed-wing, single engine Dodson International Parts INC
Rantoul, Kansas
Experimental 2020-08-12 ValidFAA registration status code V: Valid registration. All codes
N1578L Beech
A36
Fixed-wing, single engine Baloian Packing CO INC
Fresno, California
Standard 2020-08-11 ValidFAA registration status code V: Valid registration. All codes
N185VM Cessna
A185F
Fixed-wing, single engine Individual owner
Texas
Standard 2020-08-11 ValidFAA registration status code V: Valid registration. All codes
N5805J Cessna
A185E
Fixed-wing, single engine Individual owner
Alaska
Standard 2020-08-11 ValidFAA registration status code V: Valid registration. All codes
N5888C Cessna
U206G
Fixed-wing, single engine Cwf Enterprises INC
Grove, Oklahoma
Standard 2020-08-11 ValidFAA registration status code V: Valid registration. All codes
N28CN Beech-Nogle
D-45
Fixed-wing, single engine Co-owned owner
Minnesota
Standard 2020-08-10 ValidFAA registration status code V: Valid registration. All codes
N334KW Beech
F33A
Fixed-wing, single engine Co-owned owner
Wyoming
Standard 2020-08-10 ValidFAA registration status code V: Valid registration. All codes
N3824X Beech
F33A
Fixed-wing, single engine Individual owner
Washington
Standard 2020-08-10 ValidFAA registration status code V: Valid registration. All codes
N154EF Cessna
210J
Fixed-wing, single engine Individual owner
North Carolina
Standard 2020-08-07 ValidFAA registration status code V: Valid registration. All codes
N7832R Beech
V35A
Fixed-wing, single engine Individual owner
Tennessee
Standard 2020-08-07 ValidFAA registration status code V: Valid registration. All codes
N74TR Bellanca
17-30A
Fixed-wing, single engine Individual owner
Maryland
Standard 2020-08-06 ValidFAA registration status code V: Valid registration. All codes
N1095F Cessna
A185F
Fixed-wing, single engine Co-owned owner
Alaska
Standard 2020-08-05 ValidFAA registration status code V: Valid registration. All codes
N1848X Beech
A36
Fixed-wing, single engine Teo Steel INC
Ramer, Tennessee
Standard 2020-08-05 ValidFAA registration status code V: Valid registration. All codes
N8YZ Beech
A36
Fixed-wing, single engine Co-owned owner
North Carolina
Standard 2020-08-05 ValidFAA registration status code V: Valid registration. All codes
N9574G Cessna
U206F
Fixed-wing, single engine Individual owner
California
Standard 2020-08-05 ValidFAA registration status code V: Valid registration. All codes
N23607 Beech
V35B
Fixed-wing, single engine Individual owner
Colorado
Standard 2020-08-04 ValidFAA registration status code V: Valid registration. All codes
N2703T Beech
95-C55
Fixed-wing, multi-engine Individual owner
Alaska
Standard 2020-08-04 ValidFAA registration status code V: Valid registration. All codes
N45DW Beech
V35B
Fixed-wing, single engine Co-owned owner
Maine
Standard 2020-08-03 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 8, 2026. Horsepower and thrust are the FAA's figures for the series, not for a particular aircraft.