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
N25681 Beech
F33A
Fixed-wing, single engine Heli-Ventures INC
Wilmington, Delaware
Standard 2017-07-21 ValidFAA registration status code V: Valid registration. All codes
N2894W Beech
V35B
Fixed-wing, single engine Individual owner
Texas
Standard 2017-07-21 ValidFAA registration status code V: Valid registration. All codes
N5562Z Beech
F33A
Fixed-wing, single engine Individual owner
Texas
Standard 2017-07-21 ValidFAA registration status code V: Valid registration. All codes
N8404N Beech
V35A
Fixed-wing, single engine Individual owner
Nebraska
Standard 2017-07-21 ValidFAA registration status code V: Valid registration. All codes
N9476S Beech
35-C33A
Fixed-wing, single engine Individual owner
Arizona
Standard 2017-07-21 ValidFAA registration status code V: Valid registration. All codes
N2136W Beech
A36
Fixed-wing, single engine Individual owner
Michigan
Standard 2017-07-20 ValidFAA registration status code V: Valid registration. All codes
N4015A Beech
F33A
Fixed-wing, single engine Individual owner
Maryland
Standard 2017-07-20 ValidFAA registration status code V: Valid registration. All codes
N8687Q Beech
S35
Fixed-wing, single engine Individual owner
California
Standard 2017-07-20 ValidFAA registration status code V: Valid registration. All codes
N18TU Beech
V35
Fixed-wing, single engine Check Seven LLC
Champaign, Illinois
Standard 2017-07-19 ValidFAA registration status code V: Valid registration. All codes
N38282 Beech
A36
Fixed-wing, single engine Individual owner
Connecticut
Standard 2017-07-19 ValidFAA registration status code V: Valid registration. All codes
N2714T Beech
V35
Fixed-wing, single engine Vertical Flight Leasing LLC
Wilmington, Delaware
Standard 2017-07-18 ValidFAA registration status code V: Valid registration. All codes
N5511M Aero Commander
200D
Fixed-wing, single engine Individual owner
Indiana
Standard 2017-07-14 ValidFAA registration status code V: Valid registration. All codes
N7379V Bellanca
17-30
Fixed-wing, single engine Individual owner
California
Standard 2017-07-13 ValidFAA registration status code V: Valid registration. All codes
N8699Z Cessna
P206C
Fixed-wing, single engine Edaero LLC
Bangor, Maine
Standard 2017-07-13 ValidFAA registration status code V: Valid registration. All codes
N910EJ Bellanca
17-30A
Fixed-wing, single engine Individual owner
Virginia
Standard 2017-07-13 ValidFAA registration status code V: Valid registration. All codes
N2134L Beech
A36
Fixed-wing, single engine Co-owned owner
Illinois
Standard 2017-07-11 ValidFAA registration status code V: Valid registration. All codes
N4734M Beech
A36
Fixed-wing, single engine Individual owner
California
Standard 2017-07-11 ValidFAA registration status code V: Valid registration. All codes
N7355V Bellanca
17-30
Fixed-wing, single engine Individual owner
Texas
Standard 2017-07-10 ValidFAA registration status code V: Valid registration. All codes
N1124A Beech
36
Fixed-wing, single engine Willhope Aviation LLC
Mckinney, Texas
Standard 2017-07-07 ValidFAA registration status code V: Valid registration. All codes
N28047 Bellanca
17-30A
Fixed-wing, single engine Individual owner
Arizona
Standard 2017-07-07 ValidFAA registration status code V: Valid registration. All codes
N732UW Cessna
210M
Fixed-wing, single engine Centurion Cats LLC
Manhattan, Kansas
Restricted 2017-07-07 ValidFAA registration status code V: Valid registration. All codes
N8665Q Beech
S35
Fixed-wing, single engine Mojo Aerospace LLC
Wilmington, Delaware
Standard 2017-07-07 ValidFAA registration status code V: Valid registration. All codes
N1208F Cessna
A185F
Fixed-wing, single engine Yukon Air Service INC
Fairbanks, Alaska
Standard 2017-07-03 ValidFAA registration status code V: Valid registration. All codes
N3983Y Cessna
210D
Fixed-wing, single engine Individual owner
Louisiana
Standard 2017-07-03 ValidFAA registration status code V: Valid registration. All codes
N4948R Cessna
A188B
Fixed-wing, single engine Individual owner
Montana
Restricted 2017-06-29 ValidFAA registration status code V: Valid registration. All codes
N592SM Beech
V35B
Fixed-wing, single engine Individual owner
Colorado
Standard 2017-06-29 ValidFAA registration status code V: Valid registration. All codes
N6636X Cessna
210A
Fixed-wing, single engine Individual owner
Wyoming
Standard 2017-06-29 ValidFAA registration status code V: Valid registration. All codes
N9531E Bellanca
17-30A
Fixed-wing, single engine Individual owner
Illinois
Standard 2017-06-29 ValidFAA registration status code V: Valid registration. All codes
N6544V Beech
A36
Fixed-wing, single engine Individual owner
Pennsylvania
Standard 2017-06-28 ValidFAA registration status code V: Valid registration. All codes
N9486G Cessna
U206E
Fixed-wing, single engine Individual owner
Alaska
Standard 2017-06-28 ValidFAA registration status code V: Valid registration. All codes
N382S Beech
95-C55
Fixed-wing, multi-engine Individual owner
Texas
Standard 2017-06-23 ValidFAA registration status code V: Valid registration. All codes
N14745 Bellanca
17-30A
Fixed-wing, single engine Individual owner
Texas
Standard 2017-06-22 ValidFAA registration status code V: Valid registration. All codes
N2607S Cessna
210L
Fixed-wing, single engine Individual owner
Indiana
Standard 2017-06-21 ValidFAA registration status code V: Valid registration. All codes
N26K Beech
A45
Fixed-wing, single engine Individual owner
Georgia
Standard 2017-06-21 ValidFAA registration status code V: Valid registration. All codes
N5471G Beech
A36
Fixed-wing, single engine Individual owner
South Carolina
Standard 2017-06-21 ValidFAA registration status code V: Valid registration. All codes
N4733V Bellanca
17-30
Fixed-wing, single engine Individual owner
Colorado
Standard 2017-06-20 ValidFAA registration status code V: Valid registration. All codes
N53032 Cessna
A185F
Fixed-wing, single engine Sutton Aircraft Salvage LLC
Palmer, Alaska
Restricted 2017-06-20 ValidFAA registration status code V: Valid registration. All codes
N7671G Beech
A36
Fixed-wing, single engine Premier Aviation LLC
Philadelphia, Mississippi
Standard 2017-06-20 ValidFAA registration status code V: Valid registration. All codes
N951DS Beech
58
Fixed-wing, multi-engine Derrick Schmidt Enterprises INC
Vinita, Oklahoma
Standard 2017-06-20 ValidFAA registration status code V: Valid registration. All codes
N5V Beech
V35A
Fixed-wing, single engine Thompson James A
Fleming Island, Florida
Standard 2017-06-19 ValidFAA registration status code V: Valid registration. All codes
N7485C Cessna
A185F
Fixed-wing, single engine Individual owner
Michigan
Standard 2017-06-19 ValidFAA registration status code V: Valid registration. All codes
N858D Beech
V35
Fixed-wing, single engine Individual owner
California
Standard 2017-06-19 ValidFAA registration status code V: Valid registration. All codes
N764RB Cessna
210N
Fixed-wing, single engine Reo & Bpo LLC
Lewes, Delaware
Standard 2017-06-16 ValidFAA registration status code V: Valid registration. All codes
N323U Beech
V35
Fixed-wing, single engine Co-owned owner
Texas
Standard 2017-06-15 ValidFAA registration status code V: Valid registration. All codes
N8019Z Cessna
U206
Fixed-wing, single engine Golden Eagle Outfitters INC
Delta Junction, Alaska
Standard 2017-06-15 ValidFAA registration status code V: Valid registration. All codes
N5GK Beech
V35B
Fixed-wing, single engine Pacific Air Investments LLC
Paso Robles, California
Standard 2017-06-12 ValidFAA registration status code V: Valid registration. All codes
N80070 Cessna
A185F
Fixed-wing, single engine Co-owned owner
Alaska
Standard 2017-06-12 ValidFAA registration status code V: Valid registration. All codes
N14740 Bellanca
17-30A
Fixed-wing, single engine Individual owner
California
Standard 2017-06-07 ValidFAA registration status code V: Valid registration. All codes
N404BN Cessna
210E
Fixed-wing, single engine Individual owner
Texas
Standard 2017-06-07 ValidFAA registration status code V: Valid registration. All codes
N310GJ Cessna
310R
Fixed-wing, multi-engine Rocket City Aero LLC
Huntsville, Alabama
Standard 2017-06-02 ValidFAA registration status code V: Valid registration. All codes
N5172R Cessna
A185F
Fixed-wing, single engine Waterhouse Roy Todd
Mccall, Idaho
Multiple 2017-06-02 ValidFAA registration status code V: Valid registration. All codes
N52TZ Beech
F33A
Fixed-wing, single engine Co-owned owner
California
Standard 2017-06-01 ValidFAA registration status code V: Valid registration. All codes
N732RM Cessna
210M
Fixed-wing, single engine Individual owner
Delaware
Standard 2017-06-01 ValidFAA registration status code V: Valid registration. All codes
N93189 Cessna
A185F
Fixed-wing, single engine Co-owned owner
Alaska
Standard 2017-06-01 ValidFAA registration status code V: Valid registration. All codes
N185MM Cessna
A185E
Fixed-wing, single engine Co-owned owner
Arizona
Multiple 2017-05-31 ValidFAA registration status code V: Valid registration. All codes
N206HC Cessna
U206G
Fixed-wing, single engine Individual owner
New York
Standard 2017-05-26 ValidFAA registration status code V: Valid registration. All codes
N6586E Cessna
A185F
Fixed-wing, single engine Co-owned owner
Alaska
Standard 2017-05-26 ValidFAA registration status code V: Valid registration. All codes
N12EM Beech
35-C33A
Fixed-wing, single engine Individual owner
Arizona
Standard 2017-05-25 ValidFAA registration status code V: Valid registration. All codes
N8171R Beech
V35B
Fixed-wing, single engine Yankee Air Pirate LLC
Memphis, Tennessee
Standard 2017-05-24 ValidFAA registration status code V: Valid registration. All codes
N226B Cessna
210M
Fixed-wing, single engine Individual owner
New York
Standard 2017-05-23 ValidFAA registration status code V: Valid registration. All codes
N24LK Beech
A36
Fixed-wing, single engine Prime Rib Aviation LLC
Nowata, Oklahoma
Standard 2017-05-23 ValidFAA registration status code V: Valid registration. All codes
N715CT Ryan
NAVION A
Fixed-wing, single engine Individual owner
Florida
Standard 2017-05-23 ValidFAA registration status code V: Valid registration. All codes
N9446Q Beech
58
Fixed-wing, multi-engine Galt Gulch LLC
Ann Arbor, Michigan
Standard 2017-05-23 ValidFAA registration status code V: Valid registration. All codes
N4314B Beech
F33A
Fixed-wing, single engine Jab Aviation LLC
Houston, Texas
Standard 2017-05-22 ValidFAA registration status code V: Valid registration. All codes
N4463S Beech
F33A
Fixed-wing, single engine J&J Aviation LLC
Hendersonville, Tennessee
Standard 2017-05-22 ValidFAA registration status code V: Valid registration. All codes
N685S Cessna
207
Fixed-wing, single engine Second Wind Aviation CORP
Friday Harbor, Washington
Standard 2017-05-22 ValidFAA registration status code V: Valid registration. All codes
N9428G Cessna
U206E
Fixed-wing, single engine Second Wind Aviation CORP
Friday Harbor, Washington
Standard 2017-05-22 ValidFAA registration status code V: Valid registration. All codes
N1267R Bellanca
17-30A
Fixed-wing, single engine Individual owner
Arizona
Standard 2017-05-19 ValidFAA registration status code V: Valid registration. All codes
N400P Beech
V35B
Fixed-wing, single engine Bonanza V35 LLC
Bakersfield, California
Standard 2017-05-19 ValidFAA registration status code V: Valid registration. All codes
N4534S Beech
A36
Fixed-wing, single engine Co-owned owner
Pennsylvania
Standard 2017-05-17 ValidFAA registration status code V: Valid registration. All codes
N8826V Bellanca
17-30A
Fixed-wing, single engine Bush Edward L
Bainbridge, Georgia
Standard 2017-05-17 ValidFAA registration status code V: Valid registration. All codes
N20654 Beech
V35B
Fixed-wing, single engine Co-owned owner
Texas
Standard 2017-05-16 ValidFAA registration status code V: Valid registration. All codes
N8128L Cessna
210L
Fixed-wing, single engine Sayco Aviation LLC
Fayetteville, Georgia
Standard 2017-05-16 ValidFAA registration status code V: Valid registration. All codes
N5317R Cessna
A185F
Fixed-wing, single engine Individual owner
Washington
Standard 2017-05-15 ValidFAA registration status code V: Valid registration. All codes
N1803W Beech
V35B
Fixed-wing, single engine Cooper Properties INC
Denver, Colorado
Standard 2017-05-11 ValidFAA registration status code V: Valid registration. All codes
N234AP Beech
F33A
Fixed-wing, single engine Individual owner
Ohio
Standard 2017-05-11 ValidFAA registration status code V: Valid registration. All codes
N4147S Beech
F33A
Fixed-wing, single engine Co-owned owner
Oklahoma
Standard 2017-05-11 ValidFAA registration status code V: Valid registration. All codes
N3779Y Cessna
210D
Fixed-wing, single engine Individual owner
Georgia
Standard 2017-05-10 ValidFAA registration status code V: Valid registration. All codes
N21651 Cessna
A188B
Fixed-wing, single engine Individual owner
Minnesota
Restricted 2017-05-09 ValidFAA registration status code V: Valid registration. All codes
N7709R Beech
36
Fixed-wing, single engine Bonanza Angels LLC
Springfield, Virginia
Standard 2017-05-09 ValidFAA registration status code V: Valid registration. All codes
N211AT Cessna
A188B
Fixed-wing, single engine George'S Aerial Spraying Service INC
Sutton, Nebraska
Restricted 2017-05-08 ValidFAA registration status code V: Valid registration. All codes
N61025 Cessna
A185F
Fixed-wing, single engine Withheld at owner's request
Standard 2017-05-08 ValidFAA registration status code V: Valid registration. All codes
N6855Q Beech
S35
Fixed-wing, single engine Individual owner
Nevada
Standard 2017-05-08 ValidFAA registration status code V: Valid registration. All codes
N912LF Beech
V35B
Fixed-wing, single engine Individual owner
Texas
Standard 2017-05-08 ValidFAA registration status code V: Valid registration. All codes
N93018 Cessna
A185F
Fixed-wing, single engine Co-owned owner
Alaska
Standard 2017-05-08 ValidFAA registration status code V: Valid registration. All codes
N14783 Bellanca
17-30A
Fixed-wing, single engine Individual owner
South Carolina
Standard 2017-05-05 ValidFAA registration status code V: Valid registration. All codes
N1849S Beech
F33A
Fixed-wing, single engine Onedown LLC
Kalispell, Montana
Standard 2017-05-05 ValidFAA registration status code V: Valid registration. All codes
N355DJ Cessna
A185F
Fixed-wing, single engine Individual owner
Alaska
Standard 2017-05-05 ValidFAA registration status code V: Valid registration. All codes
N2316F Cessna
210E
Fixed-wing, single engine Tip of the Tusk Aviation LLC
Siloam Springs, Arkansas
Standard 2017-05-04 ValidFAA registration status code V: Valid registration. All codes
N3857Y Cessna
210D
Fixed-wing, single engine Individual owner
Tennessee
Standard 2017-05-04 ValidFAA registration status code V: Valid registration. All codes
N5680J Cessna
A188A
Fixed-wing, single engine Individual owner
North Dakota
Multiple 2017-05-04 ValidFAA registration status code V: Valid registration. All codes
N66HS Bellanca
17-30A
Fixed-wing, single engine Individual owner
Montana
Standard 2017-05-04 ValidFAA registration status code V: Valid registration. All codes
N4836Q Cessna
A185F
Fixed-wing, single engine Co-owned owner
Alaska
Standard 2017-05-03 ValidFAA registration status code V: Valid registration. All codes
N48LF Beech
S35
Fixed-wing, single engine Co-owned owner
Iowa
Standard 2017-05-03 ValidFAA registration status code V: Valid registration. All codes
N1849F Cessna
210F
Fixed-wing, single engine Co-owned owner
Idaho
Standard 2017-05-01 ValidFAA registration status code V: Valid registration. All codes
N2047N Beech
A36
Fixed-wing, single engine Awa Aviation LLC
Sacramento, California
Standard 2017-05-01 ValidFAA registration status code V: Valid registration. All codes
N510AA Cessna
210N
Fixed-wing, single engine Sky West Aviation INC Trustee
Albuquerque, New Mexico
Standard 2017-04-25 ValidFAA registration status code V: Valid registration. All codes
N93260 Cessna
210L
Fixed-wing, single engine Individual owner
Texas
Standard 2017-04-24 ValidFAA registration status code V: Valid registration. All codes
N60529 Cessna
U206F
Fixed-wing, single engine My Holdings INC
Anchorage, Alaska
Standard 2017-04-20 ValidFAA registration status code V: Valid registration. All codes
N866PH Cessna
A185F
Fixed-wing, single engine Phobos 185 LLC
Cody, Wyoming
Standard 2017-04-19 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.