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
N13XZ Thomas Craig E
WITTMAN W-10
Fixed-wing, single engine Individual owner
Montana
Experimental 2015-04-17 ValidFAA registration status code V: Valid registration. All codes
N234EB Beech
V35
Fixed-wing, single engine Individual owner
Nebraska
Standard 2015-04-17 ValidFAA registration status code V: Valid registration. All codes
N584CK Beech
58
Fixed-wing, multi-engine Kalitta Charters LLC
Ypsilanti, Michigan
Standard 2015-04-17 ValidFAA registration status code V: Valid registration. All codes
N585CK Beech
58
Fixed-wing, multi-engine Kalitta Charters LLC
Ypsilanti, Michigan
Standard 2015-04-17 ValidFAA registration status code V: Valid registration. All codes
N587CK Beech
58
Fixed-wing, multi-engine Kalitta Charters LLC
Ypsilanti, Michigan
Standard 2015-04-17 ValidFAA registration status code V: Valid registration. All codes
N588CK Beech
58
Fixed-wing, multi-engine Kalitta Charters LLC
Ypsilanti, Michigan
Standard 2015-04-17 ValidFAA registration status code V: Valid registration. All codes
N6686D Beech
58
Fixed-wing, multi-engine N6686D LLC
Idaho Springs, Colorado
Standard 2015-04-17 ValidFAA registration status code V: Valid registration. All codes
N4562M Beech
A36
Fixed-wing, single engine Bbt Aviation LLC
Rapid City, South Dakota
Standard 2015-04-16 ValidFAA registration status code V: Valid registration. All codes
N198V Bellanca
17-30
Fixed-wing, single engine Skrow Works INC
West Monroe, Louisiana
Standard 2015-04-15 ValidFAA registration status code V: Valid registration. All codes
N93548 Bellanca
17-30A
Fixed-wing, single engine Co-owned owner
California
Standard 2015-04-14 ValidFAA registration status code V: Valid registration. All codes
N5468E Cessna
A185F
Fixed-wing, single engine Individual owner
Nebraska
Standard 2015-04-13 ValidFAA registration status code V: Valid registration. All codes
N9095Q Beech
V35B
Fixed-wing, single engine Individual owner
Pennsylvania
Standard 2015-04-13 ValidFAA registration status code V: Valid registration. All codes
N81WR Beech
E-55
Fixed-wing, multi-engine Co-owned owner
Texas
Standard 2015-04-09 ValidFAA registration status code V: Valid registration. All codes
N39844 Bellanca
17-30A
Fixed-wing, single engine Aero-Spray INC
Kingfisher, Oklahoma
Standard 2015-04-08 ValidFAA registration status code V: Valid registration. All codes
N950V Beech
A36
Fixed-wing, single engine Willow Equipment LLC
Sharon Springs, Kansas
Standard 2015-04-08 ValidFAA registration status code V: Valid registration. All codes
N17764 Beech
A36
Fixed-wing, single engine N17764 LLC
Quincy, Washington
Standard 2015-04-06 ValidFAA registration status code V: Valid registration. All codes
N7462N Beech
V35A
Fixed-wing, single engine Co-owned owner
Florida
Standard 2015-04-06 ValidFAA registration status code V: Valid registration. All codes
N8922U Beech
S35
Fixed-wing, single engine N8922U LLC
Twin Falls, Idaho
Standard 2015-04-03 ValidFAA registration status code V: Valid registration. All codes
N9056M Cessna
210M
Fixed-wing, single engine Individual owner
North Carolina
Standard 2015-04-03 ValidFAA registration status code V: Valid registration. All codes
N1797X Cessna
210L
Fixed-wing, single engine N1797X Aero LLC
Gulf Breeze, Florida
Standard 2015-04-01 ValidFAA registration status code V: Valid registration. All codes
N4523S Beech
E-55
Fixed-wing, multi-engine Lucky92 & Associates LLC
Reno, Nevada
Standard 2015-04-01 ValidFAA registration status code V: Valid registration. All codes
N6116V Beech
S35
Fixed-wing, single engine Co-owned owner
New Mexico
Standard 2015-04-01 ValidFAA registration status code V: Valid registration. All codes
N8636Q Beech
S35
Fixed-wing, single engine Jv Aviation LLC
Lynden, Washington
Standard 2015-04-01 ValidFAA registration status code V: Valid registration. All codes
N203BN Cessna
310R
Fixed-wing, multi-engine Co-owned owner
Arizona
Standard 2015-03-27 ValidFAA registration status code V: Valid registration. All codes
N410RW Beech
A36
Fixed-wing, single engine Butler National INC
New Century, Kansas
Standard 2015-03-27 ValidFAA registration status code V: Valid registration. All codes
N12GB Beech
V35B
Fixed-wing, single engine Co-owned owner
Texas
Standard 2015-03-26 ValidFAA registration status code V: Valid registration. All codes
N281S Beech
D55
Fixed-wing, multi-engine Individual owner
Texas
Standard 2015-03-25 ValidFAA registration status code V: Valid registration. All codes
N66519 Beech
A36
Fixed-wing, single engine Individual owner
Alabama
Standard 2015-03-24 ValidFAA registration status code V: Valid registration. All codes
N956ND Beech
35-B33
Fixed-wing, single engine Individual owner
Florida
Standard 2015-03-24 ValidFAA registration status code V: Valid registration. All codes
N75EE Cessna
210L
Fixed-wing, single engine Lgc Consulting INC
Salisbury, North Carolina
Standard 2015-03-23 ValidFAA registration status code V: Valid registration. All codes
N8007V Cessna
A188
Fixed-wing, single engine Jcr AG LLC
Frederick, Oklahoma
Multiple 2015-03-23 ValidFAA registration status code V: Valid registration. All codes
N99ZX Beech
V35B
Fixed-wing, single engine Individual owner
Florida
Standard 2015-03-19 ValidFAA registration status code V: Valid registration. All codes
N59141 Cessna
210L
Fixed-wing, single engine Individual owner
Virginia
Standard 2015-03-18 ValidFAA registration status code V: Valid registration. All codes
N523Q Beech
V35
Fixed-wing, single engine Co-owned owner
Florida
Standard 2015-03-16 ValidFAA registration status code V: Valid registration. All codes
N206AY Cessna
U206B
Fixed-wing, single engine Individual owner
California
Standard 2015-03-12 ValidFAA registration status code V: Valid registration. All codes
N7233F Beech
F33A
Fixed-wing, single engine Tomlinson Avionics of Florida INC
Fort Myers, Florida
Standard 2015-03-12 ValidFAA registration status code V: Valid registration. All codes
N2747J Cessna
A185E
Fixed-wing, single engine Co-owned owner
Alaska
Standard 2015-03-10 ValidFAA registration status code V: Valid registration. All codes
N5403E Cessna
A185F
Fixed-wing, single engine Co-owned owner
Alaska
Standard 2015-03-10 ValidFAA registration status code V: Valid registration. All codes
N5062U Cessna
206
Fixed-wing, single engine Individual owner
Nevada
Standard 2015-03-06 ValidFAA registration status code V: Valid registration. All codes
N61388 Cessna
A185F
Fixed-wing, single engine Co-owned owner
Alaska
Standard 2015-03-06 ValidFAA registration status code V: Valid registration. All codes
N18GW Grumman
SCAN TYPE 30
Fixed-wing, multi-engine Individual owner
California
Standard 2015-03-05 ValidFAA registration status code V: Valid registration. All codes
N887CA Beech
A36
Fixed-wing, single engine Co-owned owner
Texas
Standard 2015-03-05 ValidFAA registration status code V: Valid registration. All codes
N518AB Beech
F33A
Fixed-wing, single engine Vickery Hawk Partners LLC
Fort Worth, Texas
Standard 2015-03-04 ValidFAA registration status code V: Valid registration. All codes
N5692K Beech
S35
Fixed-wing, single engine Co-owned owner
Minnesota
Standard 2015-03-04 ValidFAA registration status code V: Valid registration. All codes
N7765R Beech
V35A
Fixed-wing, single engine Dumbo Aviation LLC
Omaha, Nebraska
Standard 2015-03-03 ValidFAA registration status code V: Valid registration. All codes
N103AM Cessna
A185F
Fixed-wing, single engine N103Am LLC
Chehalis, Washington
Standard 2015-03-02 ValidFAA registration status code V: Valid registration. All codes
N17SR Cessna
A185F
Fixed-wing, single engine Ncsb LLC
Anchorage, Alaska
Standard 2015-03-02 ValidFAA registration status code V: Valid registration. All codes
N6600V Bellanca
17-30
Fixed-wing, single engine Individual owner
Ohio
Standard 2015-02-27 ValidFAA registration status code V: Valid registration. All codes
N330DJ Beech
F33A
Fixed-wing, single engine Precision Aviation Specialty Services LLC
Bay Minette, Alabama
Standard 2015-02-25 ValidFAA registration status code V: Valid registration. All codes
N1726R Cessna
A185F
Fixed-wing, single engine Individual owner
Alaska
Standard 2015-02-20 ValidFAA registration status code V: Valid registration. All codes
N286W Beech
V35
Fixed-wing, single engine Individual owner
Colorado
Standard 2015-02-19 ValidFAA registration status code V: Valid registration. All codes
N4896F Cessna
U206A
Fixed-wing, single engine Co-owned owner
Texas
Standard 2015-02-18 ValidFAA registration status code V: Valid registration. All codes
N120MP Beech
V35B
Fixed-wing, single engine Co-owned owner
California
Standard 2015-02-11 ValidFAA registration status code V: Valid registration. All codes
N5077J Cessna
310R
Fixed-wing, multi-engine Individual owner
New Mexico
Standard 2015-02-10 ValidFAA registration status code V: Valid registration. All codes
N1546Y Beech
F33A
Fixed-wing, single engine Individual owner
Florida
Standard 2015-02-06 ValidFAA registration status code V: Valid registration. All codes
N9446G Cessna
U206E
Fixed-wing, single engine Individual owner
Texas
Standard 2015-02-06 ValidFAA registration status code V: Valid registration. All codes
N7760R Beech
36
Fixed-wing, single engine Individual owner
North Carolina
Standard 2015-02-05 ValidFAA registration status code V: Valid registration. All codes
N185HM Cessna
A185F
Fixed-wing, single engine Individual owner
Alaska
Standard 2015-02-04 ValidFAA registration status code V: Valid registration. All codes
N236CT Beech
36
Fixed-wing, single engine Individual owner
Virginia
Standard 2015-02-04 ValidFAA registration status code V: Valid registration. All codes
N39808 Bellanca
17-30A
Fixed-wing, single engine Individual owner
Colorado
Standard 2015-02-04 ValidFAA registration status code V: Valid registration. All codes
N707WJ Cessna
U206G
Fixed-wing, single engine Co-owned owner
California
Standard 2015-02-03 ValidFAA registration status code V: Valid registration. All codes
N354DJ Beech
V35B
Fixed-wing, single engine N354Dj LLC
Gulfport, Mississippi
Standard 2015-01-30 ValidFAA registration status code V: Valid registration. All codes
N525TD Beech
A36
Fixed-wing, single engine High Sky Bonanza INC
Wilmington, Delaware
Standard 2015-01-30 ValidFAA registration status code V: Valid registration. All codes
N113K Cessna
310R
Fixed-wing, multi-engine Individual owner
Montana
Standard 2015-01-29 ValidFAA registration status code V: Valid registration. All codes
N5904F Cessna
210G
Fixed-wing, single engine Withheld at owner's request
Standard 2015-01-29 ValidFAA registration status code V: Valid registration. All codes
N777SZ Cessna
T210K
Fixed-wing, single engine Co-owned owner
Nevada
Standard 2015-01-27 ValidFAA registration status code V: Valid registration. All codes
N21818 Cessna
A188B
Fixed-wing, single engine Individual owner
Nebraska
Restricted 2015-01-26 ValidFAA registration status code V: Valid registration. All codes
N63936 Beech
A36
Fixed-wing, single engine Sea & Ski NW LLC
Portland, Oregon
Standard 2015-01-23 ValidFAA registration status code V: Valid registration. All codes
N23717 Beech
A36
Fixed-wing, single engine Advanced Helicopter Services
Woodland, California
Standard 2015-01-22 ValidFAA registration status code V: Valid registration. All codes
N804WR Windecker
A/C7
Fixed-wing, single engine Windecker Aircraft INC
Mooresville, North Carolina
Experimental 2015-01-20 ValidFAA registration status code V: Valid registration. All codes
N2072W Beech
V35
Fixed-wing, single engine Individual owner
Oklahoma
Standard 2015-01-14 ValidFAA registration status code V: Valid registration. All codes
N1234T Beech
35-C33A
Fixed-wing, single engine Bonanza LLC
Huntington, West Virginia
Standard 2015-01-12 ValidFAA registration status code V: Valid registration. All codes
N39MP Cessna
U206
Fixed-wing, single engine Mission Aviation Training Academy
Arlington, Washington
Standard 2015-01-08 ValidFAA registration status code V: Valid registration. All codes
N6645V Bellanca
17-30A
Fixed-wing, single engine Individual owner
Wyoming
Standard 2015-01-08 ValidFAA registration status code V: Valid registration. All codes
N91JT Bellanca
17-30A
Fixed-wing, single engine Individual owner
Texas
Standard 2015-01-07 ValidFAA registration status code V: Valid registration. All codes
N1825L Beech
V35B
Fixed-wing, single engine Bonanza Flying Club LLC
Ogden, Utah
Standard 2015-01-06 ValidFAA registration status code V: Valid registration. All codes
N35YR Beech
V35B
Fixed-wing, single engine Tonini Farm and Cattle CO
San Luis Obispo, California
Standard 2015-01-06 ValidFAA registration status code V: Valid registration. All codes
N20VK Cessna
310R
Fixed-wing, multi-engine Individual owner
Louisiana
Standard 2014-12-31 ValidFAA registration status code V: Valid registration. All codes
N6573K Beech
58
Fixed-wing, multi-engine Gta Air INC
Addison, Texas
Standard 2014-12-24 ValidFAA registration status code V: Valid registration. All codes
N754KC Cessna
414A
Fixed-wing, multi-engine Plane Crazy Aviation LLC
Fargo, North Dakota
Standard 2014-12-24 ValidFAA registration status code V: Valid registration. All codes
N882MT Beech
58
Fixed-wing, multi-engine Gta Air INC
Addison, Texas
Standard 2014-12-24 ValidFAA registration status code V: Valid registration. All codes
N7397R Beech
V35B
Fixed-wing, single engine Individual owner
California
Standard 2014-12-23 ValidFAA registration status code V: Valid registration. All codes
N11BX Beech
F33A
Fixed-wing, single engine Individual owner
Illinois
Standard 2014-12-22 ValidFAA registration status code V: Valid registration. All codes
N2186D Beech
D35
Fixed-wing, single engine Individual owner
New York
Standard 2014-12-12 ValidFAA registration status code V: Valid registration. All codes
N29SR Cessna
A185F
Fixed-wing, single engine Aviation USA LLC
Anchorage, Alaska
Restricted 2014-12-08 ValidFAA registration status code V: Valid registration. All codes
N7843R Beech
V35A
Fixed-wing, single engine Individual owner
New York
Standard 2014-12-08 ValidFAA registration status code V: Valid registration. All codes
N9515R Cessna
A185F
Fixed-wing, single engine Individual owner
North Carolina
Standard 2014-12-08 ValidFAA registration status code V: Valid registration. All codes
N3680R Beech
A36
Fixed-wing, single engine Yatra Global LLC
Bedford, Massachusetts
Standard 2014-12-03 ValidFAA registration status code V: Valid registration. All codes
N6690Y Beech
A36
Fixed-wing, single engine Three Green LLC
Towanda, Kansas
Standard 2014-12-03 ValidFAA registration status code V: Valid registration. All codes
N1832W Beech
E-55
Fixed-wing, multi-engine Tailwinds Aviation LLC
Beechgrove, Tennessee
Standard 2014-12-02 ValidFAA registration status code V: Valid registration. All codes
N4772Q Cessna
A185E
Fixed-wing, single engine Co-owned owner
Georgia
Standard 2014-12-02 ValidFAA registration status code V: Valid registration. All codes
N11EV Beech
58
Fixed-wing, multi-engine Bonita Beech LLC
Bonita Springs, Florida
Standard 2014-12-01 ValidFAA registration status code V: Valid registration. All codes
N3701Z Beech
A36
Fixed-wing, single engine N3701Z LLC
Athens, Georgia
Standard 2014-11-26 ValidFAA registration status code V: Valid registration. All codes
N24195 Beech
V35B
Fixed-wing, single engine Barrett Group LLC
Farwell, Texas
Standard 2014-11-25 ValidFAA registration status code V: Valid registration. All codes
N4586S Beech
V35B
Fixed-wing, single engine Ejh Teton Properties LLC
Petaluma, California
Standard 2014-11-25 ValidFAA registration status code V: Valid registration. All codes
N1870W Beech
A36
Fixed-wing, single engine Individual owner
Alabama
Standard 2014-11-21 ValidFAA registration status code V: Valid registration. All codes
N6832Y Cessna
310R
Fixed-wing, multi-engine Pro Aire Cargo & Consulting INC
Oshkosh, Wisconsin
Standard 2014-11-19 ValidFAA registration status code V: Valid registration. All codes
N5899T Cessna
185D
Fixed-wing, single engine Brignac Flying Service LLC
Columbus, Mississippi
Standard 2014-11-18 ValidFAA registration status code V: Valid registration. All codes
N3365S Cessna
210J
Fixed-wing, single engine Winger Cattle CO INC
Johnson, Kansas
Standard 2014-11-10 ValidFAA registration status code V: Valid registration. All codes
N2048W Beech
V35
Fixed-wing, single engine Individual owner
West Virginia
Standard 2014-11-07 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.