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
N7023N Beech
V35A
Fixed-wing, single engine Individual owner
Texas
Standard 2009-09-02 ValidFAA registration status code V: Valid registration. All codes
N999AK Beech
58
Fixed-wing, multi-engine Barber Aviation LLC
Wilmington, Delaware
Standard 2009-08-27 ValidFAA registration status code V: Valid registration. All codes
N185WB Cessna
185
Fixed-wing, single engine Individual owner
Michigan
Standard 2009-08-25 ValidFAA registration status code V: Valid registration. All codes
N93267 Cessna
A185F
Fixed-wing, single engine Cachorro Cattle CO
Granbury, Texas
Standard 2009-08-25 ValidFAA registration status code V: Valid registration. All codes
N4847V Bellanca
17-30
Fixed-wing, single engine Individual owner
Washington
Standard 2009-08-24 ValidFAA registration status code V: Valid registration. All codes
N4528S Beech
V35B
Fixed-wing, single engine Individual owner
Florida
Standard 2009-08-21 ValidFAA registration status code V: Valid registration. All codes
N1089W Beech
A36
Fixed-wing, single engine Individual owner
Virginia
Standard 2009-08-20 ValidFAA registration status code V: Valid registration. All codes
N3916Y Cessna
210D
Fixed-wing, single engine Individual owner
New York
Standard 2009-08-18 ValidFAA registration status code V: Valid registration. All codes
N8370Q Cessna
U206F
Fixed-wing, single engine State of Alaska Dept of Fish and Game
Palmer, Alaska
Standard 2009-08-14 ValidFAA registration status code V: Valid registration. All codes
N17863 Beech
A36
Fixed-wing, single engine Loon Song Flyers LLC
Brookside, New Jersey
Standard 2009-08-13 ValidFAA registration status code V: Valid registration. All codes
N210BJ Cessna
210L
Fixed-wing, single engine Summers Equipment Leasing INC
Wilmington, Delaware
Standard 2009-08-07 ValidFAA registration status code V: Valid registration. All codes
N4601U Cessna
210N
Fixed-wing, single engine Dixie Air Leasing LLC
Vichy, Missouri
Standard 2009-08-06 ValidFAA registration status code V: Valid registration. All codes
N3367S Cessna
A185F
Fixed-wing, single engine Sierra CO LLP
Wendell, Idaho
Standard 2009-08-04 ValidFAA registration status code V: Valid registration. All codes
N4608F Cessna
P206A
Fixed-wing, single engine Advanced Aerospace Consultants INC
Boynton Beach, Florida
Standard 2009-08-03 ValidFAA registration status code V: Valid registration. All codes
N116TW Beech
V35B
Fixed-wing, single engine Individual owner
New Hampshire
Standard 2009-07-31 ValidFAA registration status code V: Valid registration. All codes
N185KG Cessna
A185F
Fixed-wing, single engine Co-owned owner
Alaska
Standard 2009-07-31 ValidFAA registration status code V: Valid registration. All codes
N1500V Beech
V35B
Fixed-wing, single engine Individual owner
Massachusetts
Standard 2009-07-28 ValidFAA registration status code V: Valid registration. All codes
N5413U Beech
V35
Fixed-wing, single engine Individual owner
Florida
Standard 2009-07-24 ValidFAA registration status code V: Valid registration. All codes
N23SF Cessna
210L
Fixed-wing, single engine Co-owned owner
Michigan
Standard 2009-07-21 ValidFAA registration status code V: Valid registration. All codes
N56WH Beech
V35
Fixed-wing, single engine Steamboat Ridge LLC
Kaiser, Missouri
Standard 2009-07-13 ValidFAA registration status code V: Valid registration. All codes
N93023 Cessna
U206G
Fixed-wing, single engine Ward Air INC
Juneau, Alaska
Standard 2009-07-09 ValidFAA registration status code V: Valid registration. All codes
N2572X Cessna
P206
Fixed-wing, single engine C S Enterprises LLP
Morristown, Tennessee
Standard 2009-06-30 ValidFAA registration status code V: Valid registration. All codes
N930LF Cessna
210F
Fixed-wing, single engine Individual owner
Texas
Standard 2009-06-29 ValidFAA registration status code V: Valid registration. All codes
N88BV Beech
V35B
Fixed-wing, single engine Individual owner
Arizona
Standard 2009-06-16 ValidFAA registration status code V: Valid registration. All codes
N30AW Cessna
A185F
Fixed-wing, single engine Individual owner
Texas
Standard 2009-06-11 ValidFAA registration status code V: Valid registration. All codes
N8858V Bellanca
17-30A
Fixed-wing, single engine Co-owned owner
Oklahoma
Standard 2009-06-11 ValidFAA registration status code V: Valid registration. All codes
N6749V Beech
A36
Fixed-wing, single engine Usg Assets INC
Clarkesville, Georgia
Standard 2009-06-09 ValidFAA registration status code V: Valid registration. All codes
N3047J Cessna
A188B
Fixed-wing, single engine Individual owner
Missouri
Restricted 2009-06-08 ValidFAA registration status code V: Valid registration. All codes
N1743W Beech
V35B
Fixed-wing, single engine Co-owned owner
Arizona
Standard 2009-06-04 ValidFAA registration status code V: Valid registration. All codes
N3315Q Cessna
320D
Fixed-wing, multi-engine Tcf Ventures LLC
Wilmington, Delaware
Standard 2009-06-03 ValidFAA registration status code V: Valid registration. All codes
N59WA Cessna
U206F
Fixed-wing, single engine Adventist World Aviation INC
Wilson, North Carolina
Standard 2009-06-02 ValidFAA registration status code V: Valid registration. All codes
N186V Cessna
A185E
Fixed-wing, single engine Aplikowski Aviation LLC
Lino Lakes, Minnesota
Standard 2009-06-01 ValidFAA registration status code V: Valid registration. All codes
N28177 Bellanca
17-30A
Fixed-wing, single engine Individual owner
Texas
Standard 2009-05-29 ValidFAA registration status code V: Valid registration. All codes
N97WB Beech
V35
Fixed-wing, single engine Co-owned owner
Pennsylvania
Standard 2009-05-29 ValidFAA registration status code V: Valid registration. All codes
N8253N Beech
F33A
Fixed-wing, single engine Tejas Aviation Services LLC
Wilmington, Delaware
Standard 2009-05-28 ValidFAA registration status code V: Valid registration. All codes
N8999G Cessna
A188B
Fixed-wing, single engine Souther Field Aviation INC
Americus, Georgia
Restricted 2009-05-21 ValidFAA registration status code V: Valid registration. All codes
N911K Beech
V35
Fixed-wing, single engine Co-owned owner
Arizona
Standard 2009-05-21 ValidFAA registration status code V: Valid registration. All codes
N9837G Cessna
A188B
Fixed-wing, single engine Souther Field Aviation INC
Americus, Georgia
Restricted 2009-05-21 ValidFAA registration status code V: Valid registration. All codes
N5641S Beech
V35
Fixed-wing, single engine Titan Realty INC
San Diego, California
Standard 2009-05-20 ValidFAA registration status code V: Valid registration. All codes
N1767R Cessna
A185F
Fixed-wing, single engine Individual owner
Oregon
Standard 2009-05-19 ValidFAA registration status code V: Valid registration. All codes
N322HS Beech
V35B
Fixed-wing, single engine Reed Systems LTD
Ellenville, New York
Standard 2009-05-19 ValidFAA registration status code V: Valid registration. All codes
N3KN Beech
A36
Fixed-wing, single engine Individual owner
Texas
Standard 2009-05-19 ValidFAA registration status code V: Valid registration. All codes
N185HL Cessna
A185F
Fixed-wing, single engine Co-owned owner
Idaho
Standard 2009-05-18 ValidFAA registration status code V: Valid registration. All codes
N1541W Beech
A36
Fixed-wing, single engine Gobogo LLC
Fort Collins, Colorado
Standard 2009-05-14 ValidFAA registration status code V: Valid registration. All codes
N4816R Cessna
A188B
Fixed-wing, single engine A&C AG Aviation INC
Unadilla, Georgia
Restricted 2009-05-13 ValidFAA registration status code V: Valid registration. All codes
N4615X Cessna
U206G
Fixed-wing, single engine Waters Aero-Marine INC
South Thomaston, Maine
Standard 2009-05-12 ValidFAA registration status code V: Valid registration. All codes
N9068R Cessna
A188B
Fixed-wing, single engine Individual owner
South Dakota
Restricted 2009-04-15 ValidFAA registration status code V: Valid registration. All codes
N9764E Bellanca
17-30A
Fixed-wing, single engine Individual owner
Texas
Standard 2009-04-15 ValidFAA registration status code V: Valid registration. All codes
N7395H Cessna
A185F
Fixed-wing, single engine Wild Alaska Real Estate LLC
Anchorage, Alaska
Multiple 2009-04-13 ValidFAA registration status code V: Valid registration. All codes
N955DJ Beech
95-C55
Fixed-wing, multi-engine Co-owned owner
Florida
Standard 2009-04-13 ValidFAA registration status code V: Valid registration. All codes
N39TC Beech
A36
Fixed-wing, single engine Individual owner
Arizona
Standard 2009-04-10 ValidFAA registration status code V: Valid registration. All codes
N1080W Beech
F33A
Fixed-wing, single engine Individual owner
California
Standard 2009-04-09 ValidFAA registration status code V: Valid registration. All codes
N122VC Cessna
A185F
Fixed-wing, single engine Individual owner
Alaska
Standard 2009-04-06 ValidFAA registration status code V: Valid registration. All codes
N4487S Beech
A36
Fixed-wing, single engine Individual owner
California
Standard 2009-04-06 ValidFAA registration status code V: Valid registration. All codes
N2102F Cessna
U206
Fixed-wing, single engine Individual owner
South Dakota
Standard 2009-04-02 ValidFAA registration status code V: Valid registration. All codes
N31707 Beech
F33A
Fixed-wing, single engine Bankruptcy Services LLC
Wilmington, Delaware
Standard 2009-03-25 ValidFAA registration status code V: Valid registration. All codes
N5828S Beech
S35
Fixed-wing, single engine Custom AG LLC
El Centro, California
Standard 2009-03-23 ValidFAA registration status code V: Valid registration. All codes
N1203W Cessna
310R
Fixed-wing, multi-engine Pro Aire Cargo & Consulting INC
Oshkosh, Wisconsin
Standard 2009-03-19 ValidFAA registration status code V: Valid registration. All codes
N14705 Bellanca
17-30A
Fixed-wing, single engine Individual owner
Florida
Standard 2009-03-19 ValidFAA registration status code V: Valid registration. All codes
N6656W Beech
A36
Fixed-wing, single engine Bonanza Partners of Kc LLC
Shawnee, Kansas
Standard 2009-03-19 ValidFAA registration status code V: Valid registration. All codes
N8783V Bellanca
17-30A
Fixed-wing, single engine Co-owned owner
Oklahoma
Standard 2009-03-17 ValidFAA registration status code V: Valid registration. All codes
N2659S Cessna
A185F
Fixed-wing, single engine Individual owner
Idaho
Standard 2009-03-11 ValidFAA registration status code V: Valid registration. All codes
N7886L Beech
36
Fixed-wing, single engine N7886L LLC
Brighton, Colorado
Standard 2009-03-06 ValidFAA registration status code V: Valid registration. All codes
N8498A Beech
V35B
Fixed-wing, single engine Individual owner
Oregon
Standard 2009-02-23 ValidFAA registration status code V: Valid registration. All codes
N423MD Beech
S35
Fixed-wing, single engine Individual owner
Oklahoma
Standard 2009-02-17 ValidFAA registration status code V: Valid registration. All codes
N555TX Beech
V35B
Fixed-wing, single engine Individual owner
California
Standard 2009-02-12 ValidFAA registration status code V: Valid registration. All codes
N7299R Beech
A36
Fixed-wing, single engine Individual owner
Texas
Standard 2009-02-04 ValidFAA registration status code V: Valid registration. All codes
N61PT Cessna
U206G
Fixed-wing, single engine Wings of Faith Ministries INC
Tustin, California
Standard 2009-02-03 ValidFAA registration status code V: Valid registration. All codes
N761GD Cessna
210M
Fixed-wing, single engine Riesa Construction LLC
Herman, Nebraska
Standard 2009-01-23 ValidFAA registration status code V: Valid registration. All codes
N2773W Beech
V35B
Fixed-wing, single engine Individual owner
Colorado
Standard 2009-01-21 ValidFAA registration status code V: Valid registration. All codes
N8282R Bellanca
17-30A
Fixed-wing, single engine Co-owned owner
California
Standard 2009-01-16 ValidFAA registration status code V: Valid registration. All codes
N8070Z Cessna
U206A
Fixed-wing, single engine Co-owned owner
Alaska
Multiple 2009-01-15 ValidFAA registration status code V: Valid registration. All codes
N222PG Beech
E-55
Fixed-wing, multi-engine Co-owned owner
California
Standard 2009-01-12 ValidFAA registration status code V: Valid registration. All codes
N362SB Beech
A36
Fixed-wing, single engine Nilco Enterprises INC
Irving, Texas
Standard 2009-01-09 ValidFAA registration status code V: Valid registration. All codes
N3674G Beech
58
Fixed-wing, multi-engine Individual owner
Alabama
Standard 2008-12-23 ValidFAA registration status code V: Valid registration. All codes
N2626K Cessna
180K
Fixed-wing, single engine Upwind Floats LLC
Seattle, Washington
Standard 2008-12-22 ValidFAA registration status code V: Valid registration. All codes
N8795Q Cessna
U206G
Fixed-wing, single engine Wright Air Service INC
Fairbanks, Alaska
Standard 2008-12-22 ValidFAA registration status code V: Valid registration. All codes
N2017P Beech
V35B
Fixed-wing, single engine Individual owner
Illinois
Standard 2008-12-18 ValidFAA registration status code V: Valid registration. All codes
N61405 Cessna
A185F
Fixed-wing, single engine Individual owner
Oregon
Standard 2008-12-18 ValidFAA registration status code V: Valid registration. All codes
N716RJ Beech
F33A
Fixed-wing, single engine Individual owner
Texas
Standard 2008-12-18 ValidFAA registration status code V: Valid registration. All codes
N236JP Beech
A36
Fixed-wing, single engine Individual owner
Missouri
Standard 2008-12-17 ValidFAA registration status code V: Valid registration. All codes
N27DQ Beech
58
Fixed-wing, multi-engine Ohio University
Albany, Ohio
Experimental 2008-12-09 ValidFAA registration status code V: Valid registration. All codes
N354D Beech
S35
Fixed-wing, single engine Air Repair INC
Deadwood, South Dakota
Standard 2008-12-01 ValidFAA registration status code V: Valid registration. All codes
N4927U Cessna
210E
Fixed-wing, single engine Individual owner
Ohio
Standard 2008-11-20 ValidFAA registration status code V: Valid registration. All codes
N70CW Cessna
P206
Fixed-wing, single engine Heartland Travel LLC
Columbia, Missouri
Standard 2008-11-19 ValidFAA registration status code V: Valid registration. All codes
N21618 Cessna
A188B
Fixed-wing, single engine Individual owner
Montana
Restricted 2008-11-06 ValidFAA registration status code V: Valid registration. All codes
N3720G Cessna
310R
Fixed-wing, multi-engine Personal Space Aviation LLC
Nokomis, Florida
Standard 2008-11-05 ValidFAA registration status code V: Valid registration. All codes
N2537T Navion
NAVION H
Fixed-wing, single engine Business Air Ventures LLC
Georgetown, Delaware
Standard 2008-11-04 ValidFAA registration status code V: Valid registration. All codes
N28056 Bellanca
17-30A
Fixed-wing, single engine Individual owner
Texas
Standard 2008-10-29 ValidFAA registration status code V: Valid registration. All codes
N50958 Cessna
U206F
Fixed-wing, single engine Co-owned owner
Oregon
Standard 2008-10-28 ValidFAA registration status code V: Valid registration. All codes
N5518E Cessna
A185F
Fixed-wing, single engine Romeo Charley LLC
Boulder, Colorado
Standard 2008-10-27 ValidFAA registration status code V: Valid registration. All codes
N5948F Cessna
210H
Fixed-wing, single engine 5C1 LTD
Boerne, Texas
Standard 2008-10-27 ValidFAA registration status code V: Valid registration. All codes
N7218R Beech
A36
Fixed-wing, single engine Individual owner
California
Standard 2008-10-22 ValidFAA registration status code V: Valid registration. All codes
N1912L Beech
A36
Fixed-wing, single engine Withheld at owner's request
Standard 2008-10-17 ValidFAA registration status code V: Valid registration. All codes
N2364F Cessna
210E
Fixed-wing, single engine Individual owner
Missouri
Standard 2008-10-17 ValidFAA registration status code V: Valid registration. All codes
N2185U Cessna
U206F
Fixed-wing, single engine Co-owned owner
Alaska
Standard 2008-10-16 ValidFAA registration status code V: Valid registration. All codes
N8021A Beech
F33A
Fixed-wing, single engine Encompass Partners
Goodwell, Oklahoma
Standard 2008-10-15 ValidFAA registration status code V: Valid registration. All codes
N414SW Beech
58
Fixed-wing, multi-engine Rmi Air LLC
Ocilla, Georgia
Standard 2008-10-14 ValidFAA registration status code V: Valid registration. All codes
N18496 Beech
A36
Fixed-wing, single engine Willy P Air LLC
Fort Myers, Florida
Standard 2008-10-07 ValidFAA registration status code V: Valid registration. All codes
N434RS Beech
D55
Fixed-wing, multi-engine Co-owned owner
Wisconsin
Standard 2008-10-06 ValidFAA registration status code V: Valid registration. All codes

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.