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
N6112F Cessna
210H
Fixed-wing, single engine Pcb INC
Paradise, California
Standard 2020-05-19 ValidFAA registration status code V: Valid registration. All codes
N9914T Beech
E33A
Fixed-wing, single engine Withheld at owner's request
Standard 2020-05-19 ValidFAA registration status code V: Valid registration. All codes
N104BW Cessna
A185F
Fixed-wing, single engine Jurak Mike D
Kimberly, Idaho
Standard 2020-05-18 ValidFAA registration status code V: Valid registration. All codes
N2051K Beech
V35B
Fixed-wing, single engine Socio Aviation Services LLC
Benton, Kentucky
Standard 2020-05-18 ValidFAA registration status code V: Valid registration. All codes
N9450S Beech
V35
Fixed-wing, single engine Dakota Sierra LLC
Horace, North Dakota
Standard 2020-05-18 ValidFAA registration status code V: Valid registration. All codes
N4888V Bellanca
17-30
Fixed-wing, single engine Individual owner
Kansas
Standard 2020-05-14 ValidFAA registration status code V: Valid registration. All codes
N4107S Beech
V35B
Fixed-wing, single engine Annamar LLC
Wilmington, Delaware
Standard 2020-05-13 ValidFAA registration status code V: Valid registration. All codes
N13VM Beech
F33A
Fixed-wing, single engine Ahs Aero LLC
Phoenix, Arizona
Standard 2020-05-08 ValidFAA registration status code V: Valid registration. All codes
N1903L Beech
V35B
Fixed-wing, single engine N1903L LLC
Jacksonville, Florida
Standard 2020-05-07 ValidFAA registration status code V: Valid registration. All codes
N55SP Beech
V35
Fixed-wing, single engine J&D Flying LLC
Clinton, Missouri
Standard 2020-05-07 ValidFAA registration status code V: Valid registration. All codes
N7320G Cessna
U206G
Fixed-wing, single engine Delaware Aircraft Trust LLC Trustee
New Castle, Delaware
Restricted 2020-05-07 ValidFAA registration status code V: Valid registration. All codes
N96VW Beech
A36
Fixed-wing, single engine Individual owner
Texas
Standard 2020-05-06 ValidFAA registration status code V: Valid registration. All codes
N714KH Cessna
A185F
Fixed-wing, single engine Flying Moose Alaska LLC
Clear, Alaska
Restricted 2020-05-05 ValidFAA registration status code V: Valid registration. All codes
N134SM Beech
D-45
Fixed-wing, single engine Czech Six LLC
Lafayette, Louisiana
Standard 2020-05-04 ValidFAA registration status code V: Valid registration. All codes
N521KM Cessna
210N
Fixed-wing, single engine Individual owner
Texas
Standard 2020-05-04 ValidFAA registration status code V: Valid registration. All codes
N158BM Beech
58
Fixed-wing, multi-engine Chorman Spraying LLC
Milton, Delaware
Standard 2020-04-30 ValidFAA registration status code V: Valid registration. All codes
N400RC Beech
V35B
Fixed-wing, single engine Individual owner
Texas
Standard 2020-04-29 ValidFAA registration status code V: Valid registration. All codes
N866CS Cessna
A185F
Fixed-wing, single engine Global Air Concepts LLC
Anchorage, Alaska
Restricted 2020-04-29 ValidFAA registration status code V: Valid registration. All codes
N8400N Beech
V35A
Fixed-wing, single engine Individual owner
North Carolina
Standard 2020-04-28 ValidFAA registration status code V: Valid registration. All codes
N1604W Beech
58
Fixed-wing, multi-engine Steve Byrd Aviation LLC
Terrell, Texas
Standard 2020-04-27 ValidFAA registration status code V: Valid registration. All codes
N360DC Cessna
A185F
Fixed-wing, single engine Co-owned owner
Alaska
Standard 2020-04-27 ValidFAA registration status code V: Valid registration. All codes
N8564Q Cessna
U206F
Fixed-wing, single engine Envii Aviation LLC
Monroe, Washington
Standard 2020-04-27 ValidFAA registration status code V: Valid registration. All codes
N93157 Cessna
210L
Fixed-wing, single engine Individual owner
Minnesota
Standard 2020-04-27 ValidFAA registration status code V: Valid registration. All codes
N102HL Beech
A36
Fixed-wing, single engine Individual owner
Nevada
Standard 2020-04-23 ValidFAA registration status code V: Valid registration. All codes
N1717W Beech
V35B
Fixed-wing, single engine Individual owner
Alabama
Standard 2020-04-23 ValidFAA registration status code V: Valid registration. All codes
N1735E Cessna
310R
Fixed-wing, multi-engine Rsc Ventures LLC
Phoenix, Arizona
Standard 2020-04-23 ValidFAA registration status code V: Valid registration. All codes
N2778J Cessna
A185E
Fixed-wing, single engine Individual owner
Alaska
Multiple 2020-04-23 ValidFAA registration status code V: Valid registration. All codes
N3974G Cessna
U206C
Fixed-wing, single engine Individual owner
Alaska
Standard 2020-04-23 ValidFAA registration status code V: Valid registration. All codes
N567RS Beech
V35
Fixed-wing, single engine Individual owner
Georgia
Standard 2020-04-23 ValidFAA registration status code V: Valid registration. All codes
N7102N Beech
V35A
Fixed-wing, single engine Individual owner
Florida
Standard 2020-04-23 ValidFAA registration status code V: Valid registration. All codes
N3946Q Cessna
A185F
Fixed-wing, single engine Individual owner
Oregon
Standard 2020-04-22 ValidFAA registration status code V: Valid registration. All codes
N4764B Cessna
A185F
Fixed-wing, single engine Individual owner
New Hampshire
Standard 2020-04-22 ValidFAA registration status code V: Valid registration. All codes
N9142Q Beech
F33A
Fixed-wing, single engine Individual owner
Oklahoma
Standard 2020-04-22 ValidFAA registration status code V: Valid registration. All codes
N6492N Cessna
210N
Fixed-wing, single engine Co-owned owner
New Mexico
Standard 2020-04-21 ValidFAA registration status code V: Valid registration. All codes
N8276R Bellanca
17-30A
Fixed-wing, single engine Individual owner
Mississippi
Standard 2020-04-20 ValidFAA registration status code V: Valid registration. All codes
N2024A Beech
F33A
Fixed-wing, single engine New Heights Aviation LLC
Waxhaw, North Carolina
Standard 2020-04-17 ValidFAA registration status code V: Valid registration. All codes
N2640F Cessna
310R
Fixed-wing, multi-engine Laguna Verde Leasing INC
Wilmington, Delaware
Standard 2020-04-17 ValidFAA registration status code V: Valid registration. All codes
N388S Cessna
U206G
Fixed-wing, single engine Individual owner
Alaska
Standard 2020-04-17 ValidFAA registration status code V: Valid registration. All codes
N2021E Beech
V35B
Fixed-wing, single engine Eagle Home Medical CORP
Roanoke Rapids, North Carolina
Standard 2020-04-16 ValidFAA registration status code V: Valid registration. All codes
N2127F Cessna
U206
Fixed-wing, single engine Individual owner
Washington
Standard 2020-04-16 ValidFAA registration status code V: Valid registration. All codes
N9385N Cessna
A185F
Fixed-wing, single engine Individual owner
Texas
Standard 2020-04-16 ValidFAA registration status code V: Valid registration. All codes
N53006 Cessna
A185F
Fixed-wing, single engine Hemphill Holdings LLC
Hemphill, Texas
Standard 2020-04-15 ValidFAA registration status code V: Valid registration. All codes
N72PT Beech
58
Fixed-wing, multi-engine Inverted Holdings LLC
Newnan, Georgia
Standard 2020-04-15 ValidFAA registration status code V: Valid registration. All codes
N818DB Beech
A36
Fixed-wing, single engine Bluebird Holdings LLC
Morris, Minnesota
Standard 2020-04-15 ValidFAA registration status code V: Valid registration. All codes
N2597X Cessna
P206
Fixed-wing, single engine Individual owner
Alaska
Standard 2020-04-13 ValidFAA registration status code V: Valid registration. All codes
N919TP Beech
V35B
Fixed-wing, single engine Individual owner
Washington
Standard 2020-04-09 ValidFAA registration status code V: Valid registration. All codes
N4444K Beech
S35
Fixed-wing, single engine Individual owner
Florida
Standard 2020-04-08 ValidFAA registration status code V: Valid registration. All codes
N541JE Beech
58
Fixed-wing, multi-engine Individual owner
Florida
Standard 2020-04-08 ValidFAA registration status code V: Valid registration. All codes
N26FC Cessna
U206F
Fixed-wing, single engine Rwr Air INC
Tok, Alaska
Standard 2020-04-07 ValidFAA registration status code V: Valid registration. All codes
N8065Z Cessna
U206A
Fixed-wing, single engine Zulu Forty One LLC
Anchorage, Alaska
Standard 2020-04-07 ValidFAA registration status code V: Valid registration. All codes
N95AR Aero Commander
500-A
Fixed-wing, multi-engine Individual owner
Oregon
Standard 2020-04-07 ValidFAA registration status code V: Valid registration. All codes
N967V Beech
58
Fixed-wing, multi-engine Volare USA CORP
Wilmington, Delaware
Standard 2020-04-07 ValidFAA registration status code V: Valid registration. All codes
N1855S Beech
F33A
Fixed-wing, single engine 1855 Sierra LLC
Brighton, Michigan
Standard 2020-04-06 ValidFAA registration status code V: Valid registration. All codes
N5581T Beech
F33A
Fixed-wing, single engine Co-owned owner
Massachusetts
Standard 2020-04-03 ValidFAA registration status code V: Valid registration. All codes
N888S Beech
V35B
Fixed-wing, single engine K5 Aviation LLC
Las Vegas, Nevada
Standard 2020-04-03 ValidFAA registration status code V: Valid registration. All codes
N60AU Beech
E-55
Fixed-wing, multi-engine Life'S A Beech LLC
Sun Prairie, Wisconsin
Standard 2020-04-02 ValidFAA registration status code V: Valid registration. All codes
N69WS Beech
58
Fixed-wing, multi-engine Hurricane Joaquin LLC
Umatilla, Florida
Standard 2020-04-02 ValidFAA registration status code V: Valid registration. All codes
N8662Q Beech
S35
Fixed-wing, single engine Grant Aviation LLC
Cheyenne, Wyoming
Standard 2020-04-02 ValidFAA registration status code V: Valid registration. All codes
N8710Q Cessna
U206G
Fixed-wing, single engine Micro Tool INC
Idaho Falls, Idaho
Standard 2020-04-02 ValidFAA registration status code V: Valid registration. All codes
N7475N Beech
V35A
Fixed-wing, single engine N7475N LLC
Indianapolis, Indiana
Standard 2020-03-30 ValidFAA registration status code V: Valid registration. All codes
N222AT Cessna
210J
Fixed-wing, single engine Sierra 1 Tech INC
Blue Jay, California
Standard 2020-03-27 ValidFAA registration status code V: Valid registration. All codes
N35CG Beech
V35B
Fixed-wing, single engine Comesa Service Group
Middletown, Delaware
Standard 2020-03-27 ValidFAA registration status code V: Valid registration. All codes
N7900M Beech
V35
Fixed-wing, single engine Withheld at owner's request
Standard 2020-03-27 ValidFAA registration status code V: Valid registration. All codes
N720DW Beech
F33C
Fixed-wing, single engine Catalina Sierra INC
Wilmington, Delaware
Standard 2020-03-26 ValidFAA registration status code V: Valid registration. All codes
N93698 Bellanca
17-30A
Fixed-wing, single engine Individual owner
South Carolina
Standard 2020-03-26 ValidFAA registration status code V: Valid registration. All codes
N3041K Beech
F33A
Fixed-wing, single engine Dodson International Parts INC
Rantoul, Kansas
Standard 2020-03-25 ValidFAA registration status code V: Valid registration. All codes
N11CE Cessna
A185F
Fixed-wing, single engine Individual owner
Texas
Standard 2020-03-24 ValidFAA registration status code V: Valid registration. All codes
N206JL Cessna
U206C
Fixed-wing, single engine 3 Tango 3 Flight LLC
Boyceville, Wisconsin
Standard 2020-03-24 ValidFAA registration status code V: Valid registration. All codes
N25MM Cessna
A185F
Fixed-wing, single engine Fairweather Aviation Leasing LLC
Haines, Alaska
Standard 2020-03-24 ValidFAA registration status code V: Valid registration. All codes
N2029D Beech
V35B
Fixed-wing, single engine Victory Auto Sales LLC
Memphis, Tennessee
Standard 2020-03-23 ValidFAA registration status code V: Valid registration. All codes
N5910S Beech
V35
Fixed-wing, single engine Crow River Aviation LLC
Watertown, Minnesota
Standard 2020-03-23 ValidFAA registration status code V: Valid registration. All codes
N184EH Beech
F33A
Fixed-wing, single engine Ten Hi Flyers INC
Denver, Colorado
Standard 2020-03-19 ValidFAA registration status code V: Valid registration. All codes
N2556X Cessna
P206
Fixed-wing, single engine Individual owner
Minnesota
Standard 2020-03-19 ValidFAA registration status code V: Valid registration. All codes
N4497S Beech
F33A
Fixed-wing, single engine Individual owner
California
Standard 2020-03-19 ValidFAA registration status code V: Valid registration. All codes
N29164 Cessna
TU206C
Fixed-wing, single engine Individual owner
Idaho
Standard 2020-03-18 ValidFAA registration status code V: Valid registration. All codes
N807WC Cessna
210M
Fixed-wing, single engine Et Fly Home LLC
Auburn, Alabama
Standard 2020-03-18 ValidFAA registration status code V: Valid registration. All codes
N8AJ Cessna
P206B
Fixed-wing, single engine Bs Designs INC
Decatur, Texas
Standard 2020-03-17 ValidFAA registration status code V: Valid registration. All codes
N2168L Beech
A36
Fixed-wing, single engine Robbins Aviation LLC
Genoa, New York
Standard 2020-03-16 ValidFAA registration status code V: Valid registration. All codes
N5909F Cessna
210G
Fixed-wing, single engine Individual owner
Colorado
Standard 2020-03-16 ValidFAA registration status code V: Valid registration. All codes
N72288 Cessna
TU206D
Fixed-wing, single engine Co-owned owner
Idaho
Restricted 2020-03-13 ValidFAA registration status code V: Valid registration. All codes
N6008F Beech
S35
Fixed-wing, single engine Shared 08F INC
Pensacola Beach, Florida
Standard 2020-03-12 ValidFAA registration status code V: Valid registration. All codes
N7941R Beech
V35A
Fixed-wing, single engine Withheld at owner's request
Standard 2020-03-12 ValidFAA registration status code V: Valid registration. All codes
N901TC Beech
F33A
Fixed-wing, single engine Boho LLC
Lewes, Delaware
Standard 2020-03-12 ValidFAA registration status code V: Valid registration. All codes
N555V Beech
A36
Fixed-wing, single engine Rm A36 LLC
Jacksonville, Florida
Standard 2020-03-11 ValidFAA registration status code V: Valid registration. All codes
N70EE Beech
95-C55
Fixed-wing, multi-engine Co-owned owner
Kansas
Standard 2020-03-11 ValidFAA registration status code V: Valid registration. All codes
N44PB Beech
S35
Fixed-wing, single engine Individual owner
South Dakota
Standard 2020-03-10 ValidFAA registration status code V: Valid registration. All codes
N600NU Cessna
U206G
Fixed-wing, single engine N600Nu LLC
New Meadows, Idaho
Standard 2020-03-10 ValidFAA registration status code V: Valid registration. All codes
N30WG Beech
E-55
Fixed-wing, multi-engine Individual owner
California
Standard 2020-03-09 ValidFAA registration status code V: Valid registration. All codes
N1951T Cessna
A185F
Fixed-wing, single engine Individual owner
Ohio
Standard 2020-03-06 ValidFAA registration status code V: Valid registration. All codes
N3347S Cessna
210J
Fixed-wing, single engine Co-owned owner
Kansas
Standard 2020-03-06 ValidFAA registration status code V: Valid registration. All codes
N32WH Beech
A36
Fixed-wing, single engine Eagle Air Partners LLC
Bartlett, Tennessee
Standard 2020-03-05 ValidFAA registration status code V: Valid registration. All codes
N485HP Beech
F33A
Fixed-wing, single engine High Performance Aircraft LLC
El Cajon, California
Standard 2020-03-05 ValidFAA registration status code V: Valid registration. All codes
N488HP Beech
F33A
Fixed-wing, single engine High Performance Aircraft LLC
El Cajon, California
Standard 2020-03-05 ValidFAA registration status code V: Valid registration. All codes
N489HP Beech
F33A
Fixed-wing, single engine High Performance Aircraft LLC
El Cajon, California
Standard 2020-03-05 ValidFAA registration status code V: Valid registration. All codes
N618CH Beech
E-55
Fixed-wing, multi-engine Individual owner
Georgia
Standard 2020-03-05 ValidFAA registration status code V: Valid registration. All codes
N9455S Beech
V35
Fixed-wing, single engine Co-owned owner
Texas
Standard 2020-03-05 ValidFAA registration status code V: Valid registration. All codes
N9889Y Cessna
210N
Fixed-wing, single engine Individual owner
North Carolina
Standard 2020-03-05 ValidFAA registration status code V: Valid registration. All codes
N185FM Cessna
A185F
Fixed-wing, single engine Co-owned owner
Nevada
Standard 2020-03-02 ValidFAA registration status code V: Valid registration. All codes
N48FC Cessna
U206C
Fixed-wing, single engine Soarmates INC
Missoula, Montana
Standard 2020-03-02 ValidFAA registration status code V: Valid registration. All codes
N55RH Cessna
P206D
Fixed-wing, single engine Individual owner
California
Standard 2020-03-02 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.