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
N8485N Beech
V35A
Fixed-wing, single engine Co-owned owner
Texas
Standard 2013-11-21 ValidFAA registration status code V: Valid registration. All codes
N185CS Cessna
A185F
Fixed-wing, single engine Individual owner
Virginia
Standard 2013-11-14 ValidFAA registration status code V: Valid registration. All codes
N28169 Bellanca
17-30A
Fixed-wing, single engine Individual owner
Texas
Standard 2013-11-14 ValidFAA registration status code V: Valid registration. All codes
N5191U Cessna
206
Fixed-wing, single engine Co-owned owner
Arizona
Standard 2013-11-12 ValidFAA registration status code V: Valid registration. All codes
N179MC Beech
F33A
Fixed-wing, single engine Individual owner
Texas
Standard 2013-11-07 ValidFAA registration status code V: Valid registration. All codes
N4604A Beech
A36
Fixed-wing, single engine Individual owner
Pennsylvania
Standard 2013-11-06 ValidFAA registration status code V: Valid registration. All codes
N25JK Beech
D55
Fixed-wing, multi-engine Coastal Slr Corperation
Port Orange, Florida
Standard 2013-11-05 ValidFAA registration status code V: Valid registration. All codes
N897T Beech
V35B
Fixed-wing, single engine Withheld at owner's request
Standard 2013-11-05 ValidFAA registration status code V: Valid registration. All codes
N350TB Beech
A36
Fixed-wing, single engine Individual owner
Illinois
Standard 2013-11-04 ValidFAA registration status code V: Valid registration. All codes
N5203U Cessna
206
Fixed-wing, single engine Co-owned owner
Colorado
Standard 2013-11-04 ValidFAA registration status code V: Valid registration. All codes
N7244R Beech
58
Fixed-wing, multi-engine Contract Fabricators INC
Holly Springs, Mississippi
Standard 2013-11-04 ValidFAA registration status code V: Valid registration. All codes
N3907Y Cessna
210D
Fixed-wing, single engine Individual owner
Texas
Standard 2013-10-31 ValidFAA registration status code V: Valid registration. All codes
N95PY Cessna
210E
Fixed-wing, single engine Jayviation INC
Lake City, Florida
Standard 2013-10-31 ValidFAA registration status code V: Valid registration. All codes
N717KH Beech
F33A
Fixed-wing, single engine Individual owner
Pennsylvania
Standard 2013-10-30 ValidFAA registration status code V: Valid registration. All codes
N36QM Beech
A36
Fixed-wing, single engine Flight Solutions LLC
Columbia, Missouri
Standard 2013-10-29 ValidFAA registration status code V: Valid registration. All codes
N5436A Cessna
210N
Fixed-wing, single engine Jls Investments INC
Lafayette, Louisiana
Standard 2013-10-29 ValidFAA registration status code V: Valid registration. All codes
N18271 Beech
A36
Fixed-wing, single engine Individual owner
Texas
Standard 2013-10-28 ValidFAA registration status code V: Valid registration. All codes
N310KC Cessna
310R
Fixed-wing, multi-engine Co-owned owner
Texas
Standard 2013-10-25 ValidFAA registration status code V: Valid registration. All codes
N113TW Beech
V35B
Fixed-wing, single engine Individual owner
Texas
Standard 2013-10-23 ValidFAA registration status code V: Valid registration. All codes
N5642W Beech
F33A
Fixed-wing, single engine Co-owned owner
California
Standard 2013-10-22 ValidFAA registration status code V: Valid registration. All codes
N2JX Beech
S35
Fixed-wing, single engine Brookeash INC
Waxahachie, Texas
Standard 2013-10-21 ValidFAA registration status code V: Valid registration. All codes
N87SP Beech
V35A
Fixed-wing, single engine Borabora LLC
Tampa, Florida
Standard 2013-10-21 ValidFAA registration status code V: Valid registration. All codes
N7367R Beech
V35B
Fixed-wing, single engine Mockingbird Aviation LLC
Wilmington, North Carolina
Standard 2013-10-18 ValidFAA registration status code V: Valid registration. All codes
N6671X Beech
58
Fixed-wing, multi-engine Dairy Air LLC
Mount Crawford, Virginia
Standard 2013-10-17 ValidFAA registration status code V: Valid registration. All codes
N176TC Cessna
A185F
Fixed-wing, single engine Redtail Cirrus LLC
Boise, Idaho
Standard 2013-09-30 ValidFAA registration status code V: Valid registration. All codes
N29217 Cessna
U206C
Fixed-wing, single engine Individual owner
Minnesota
Standard 2013-09-25 ValidFAA registration status code V: Valid registration. All codes
N5026U Cessna
206
Fixed-wing, single engine Borders Nowell Equipment G P INC
Edinburg, Texas
Standard 2013-09-25 ValidFAA registration status code V: Valid registration. All codes
N7341C Cessna
210N
Fixed-wing, single engine T Cole Holdings I LLC
Paint Rock, Texas
Standard 2013-09-25 ValidFAA registration status code V: Valid registration. All codes
N29142 Cessna
U206C
Fixed-wing, single engine Individual owner
Alaska
Standard 2013-09-24 ValidFAA registration status code V: Valid registration. All codes
N761NT Cessna
210M
Fixed-wing, single engine Co-owned owner
Colorado
Standard 2013-09-24 ValidFAA registration status code V: Valid registration. All codes
N5878F Cessna
210G
Fixed-wing, single engine Individual owner
Illinois
Standard 2013-09-23 ValidFAA registration status code V: Valid registration. All codes
N777Z Beech
S35
Fixed-wing, single engine Individual owner
Illinois
Standard 2013-09-23 ValidFAA registration status code V: Valid registration. All codes
N6746B Beech
V35B
Fixed-wing, single engine Individual owner
Washington
Standard 2013-09-18 ValidFAA registration status code V: Valid registration. All codes
N937WB Beech
F33A
Fixed-wing, single engine 7Wb LLC
Middletown, Delaware
Standard 2013-09-18 ValidFAA registration status code V: Valid registration. All codes
N616 Cessna
U206B
Fixed-wing, single engine U S D A Forest Service Fepp
Columbia, South Carolina
Multiple 2013-09-16 ValidFAA registration status code V: Valid registration. All codes
N761TE Cessna
210M
Fixed-wing, single engine Draegerweb Aviation LLC
Linden, Michigan
Standard 2013-09-16 ValidFAA registration status code V: Valid registration. All codes
N27T Beech
A36
Fixed-wing, single engine Individual owner
Texas
Standard 2013-09-13 ValidFAA registration status code V: Valid registration. All codes
N7357R Beech
A36
Fixed-wing, single engine Co-owned owner
Florida
Standard 2013-09-11 ValidFAA registration status code V: Valid registration. All codes
N8121G Cessna
210K
Fixed-wing, single engine Two One Golf LTD
Waterloo, Iowa
Standard 2013-09-10 ValidFAA registration status code V: Valid registration. All codes
N9780V Cessna
A188
Fixed-wing, single engine Country Aero LLC
Darwin, Minnesota
Restricted 2013-09-06 ValidFAA registration status code V: Valid registration. All codes
N2496T Navion
NAVION G
Fixed-wing, single engine Individual owner
Alaska
Standard 2013-09-05 ValidFAA registration status code V: Valid registration. All codes
N6746T Beech
A36
Fixed-wing, single engine Flying Wolf LLC
Lomita, California
Standard 2013-09-05 ValidFAA registration status code V: Valid registration. All codes
N7993M Beech
35-C33A
Fixed-wing, single engine Individual owner
Ohio
Standard 2013-09-05 ValidFAA registration status code V: Valid registration. All codes
N3992Q Cessna
A185F
Fixed-wing, single engine Co-owned owner
Idaho
Standard 2013-09-03 ValidFAA registration status code V: Valid registration. All codes
N4718F Cessna
P206B
Fixed-wing, single engine Pbar INC
Joseph, Oregon
Standard 2013-08-30 ValidFAA registration status code V: Valid registration. All codes
N3675T Beech
A36
Fixed-wing, single engine Individual owner
Indiana
Standard 2013-08-28 ValidFAA registration status code V: Valid registration. All codes
N661SB Beech
V35
Fixed-wing, single engine Individual owner
Tennessee
Standard 2013-08-26 ValidFAA registration status code V: Valid registration. All codes
N234GT Cessna
210M
Fixed-wing, single engine Any Border LLC
Yankton, South Dakota
Standard 2013-08-21 ValidFAA registration status code V: Valid registration. All codes
N206CW Beech
F33A
Fixed-wing, single engine Agri Med LLC
Belgrade, Montana
Standard 2013-08-19 ValidFAA registration status code V: Valid registration. All codes
N41LL Beech
A36
Fixed-wing, single engine Notjets LLC
Paradise Valley, Arizona
Standard 2013-08-15 ValidFAA registration status code V: Valid registration. All codes
N4761C Cessna
210N
Fixed-wing, single engine Forbis Aviation LLC
Calera, Oklahoma
Standard 2013-08-15 ValidFAA registration status code V: Valid registration. All codes
N5697K Beech
S35
Fixed-wing, single engine Merimont Aviation LLC
Dyersburg, Tennessee
Standard 2013-08-14 ValidFAA registration status code V: Valid registration. All codes
N78HF Beech
F33A
Fixed-wing, single engine Individual owner
Illinois
Standard 2013-08-14 ValidFAA registration status code V: Valid registration. All codes
N2777P Beech
V35
Fixed-wing, single engine Individual owner
Tennessee
Standard 2013-08-09 ValidFAA registration status code V: Valid registration. All codes
N181PJ Beech
V35B
Fixed-wing, single engine Co-owned owner
Texas
Standard 2013-08-08 ValidFAA registration status code V: Valid registration. All codes
N3078H Beech
F33A
Fixed-wing, single engine Co-owned owner
Iowa
Standard 2013-08-05 ValidFAA registration status code V: Valid registration. All codes
N4939R Cessna
A188B
Fixed-wing, single engine Miller Farms Jv
Opheim, Montana
Restricted 2013-08-05 ValidFAA registration status code V: Valid registration. All codes
N933TM Beech
F33A
Fixed-wing, single engine Planet Aviation LLC
Pinehurst, North Carolina
Standard 2013-08-05 ValidFAA registration status code V: Valid registration. All codes
N352RH Beech
S35
Fixed-wing, single engine Individual owner
California
Standard 2013-08-02 ValidFAA registration status code V: Valid registration. All codes
N8367Q Cessna
A185F
Fixed-wing, single engine Individual owner
Washington
Standard 2013-08-02 ValidFAA registration status code V: Valid registration. All codes
N2998T Aero Commander
200D
Fixed-wing, single engine Individual owner
Arizona
Standard 2013-07-31 ValidFAA registration status code V: Valid registration. All codes
N702JK Beech
58
Fixed-wing, multi-engine Alpha Whiskey Air Company LLC
Richardton, North Dakota
Standard 2013-07-30 ValidFAA registration status code V: Valid registration. All codes
N4393A Beech
F33A
Fixed-wing, single engine Individual owner
Colorado
Standard 2013-07-29 ValidFAA registration status code V: Valid registration. All codes
N9798R Beech
M35
Fixed-wing, single engine Marine Aviation Museum INC
Wilmington, Delaware
Standard 2013-07-29 ValidFAA registration status code V: Valid registration. All codes
N29970 Cessna
185
Fixed-wing, single engine Co-owned owner
Alaska
Standard 2013-07-26 ValidFAA registration status code V: Valid registration. All codes
N6603V Bellanca
17-30A
Fixed-wing, single engine Cmbb Enterprises LLC
Plainview, Texas
Standard 2013-07-26 ValidFAA registration status code V: Valid registration. All codes
N881PR Cessna
A185F
Fixed-wing, single engine Individual owner
Alaska
Standard 2013-07-26 ValidFAA registration status code V: Valid registration. All codes
N233SC Beech
V35B
Fixed-wing, single engine Individual owner
Texas
Standard 2013-07-24 ValidFAA registration status code V: Valid registration. All codes
N33UB Beech
F33A
Fixed-wing, single engine Individual owner
Tennessee
Standard 2013-07-24 ValidFAA registration status code V: Valid registration. All codes
N2037L Beech
F33A
Fixed-wing, single engine Individual owner
Alabama
Standard 2013-07-22 ValidFAA registration status code V: Valid registration. All codes
N4698C Cessna
A185F
Fixed-wing, single engine 98 Charlie LLC
Anchorage, Alaska
Multiple 2013-07-22 ValidFAA registration status code V: Valid registration. All codes
N622DC Cessna
A185F
Fixed-wing, single engine Carter Aviation LLC
Denver, Colorado
Standard 2013-07-17 ValidFAA registration status code V: Valid registration. All codes
N232N Beech
F33A
Fixed-wing, single engine Individual owner
Texas
Standard 2013-07-16 ValidFAA registration status code V: Valid registration. All codes
N80520 Cessna
A185F
Fixed-wing, single engine Individual owner
Florida
Standard 2013-07-16 ValidFAA registration status code V: Valid registration. All codes
N7517N Beech
V35A
Fixed-wing, single engine Eagle Squadron INC
The Villages, Florida
Standard 2013-07-15 ValidFAA registration status code V: Valid registration. All codes
N888JN Cessna
U206F
Fixed-wing, single engine Co-owned owner
Ohio
Standard 2013-07-15 ValidFAA registration status code V: Valid registration. All codes
N2717T Beech
95-C55
Fixed-wing, multi-engine Individual owner
Wyoming
Standard 2013-07-11 ValidFAA registration status code V: Valid registration. All codes
N9823V Cessna
A188
Fixed-wing, single engine Sundance Aviation INC
Moriarty, New Mexico
Multiple 2013-07-10 ValidFAA registration status code V: Valid registration. All codes
N7868L Beech
V35
Fixed-wing, single engine Individual owner
California
Standard 2013-07-09 ValidFAA registration status code V: Valid registration. All codes
N2624X Cessna
P206
Fixed-wing, single engine Co-owned owner
Alaska
Standard 2013-07-08 ValidFAA registration status code V: Valid registration. All codes
N4529M Beech
V35B
Fixed-wing, single engine Individual owner
Colorado
Standard 2013-07-08 ValidFAA registration status code V: Valid registration. All codes
N2019K Beech
F33A
Fixed-wing, single engine Individual owner
Georgia
Standard 2013-07-03 ValidFAA registration status code V: Valid registration. All codes
N325SR Beech
95-C55
Fixed-wing, multi-engine Co-owned owner
Texas
Standard 2013-07-03 ValidFAA registration status code V: Valid registration. All codes
N2895W Beech
A36
Fixed-wing, single engine N2895W LLC
Mount Airy, Maryland
Standard 2013-07-01 ValidFAA registration status code V: Valid registration. All codes
N5804K Beech
S35
Fixed-wing, single engine Individual owner
Texas
Standard 2013-07-01 ValidFAA registration status code V: Valid registration. All codes
N9034S Beech
S35
Fixed-wing, single engine Co-owned owner
Arizona
Standard 2013-06-28 ValidFAA registration status code V: Valid registration. All codes
N25FG Cessna
A185F
Fixed-wing, single engine State of California Department of Fish and Game
Sacramento, California
Standard 2013-06-25 ValidFAA registration status code V: Valid registration. All codes
N16HT Cessna
206
Fixed-wing, single engine Aviation Specialties Unlimited INC
Boise, Idaho
Standard 2013-06-24 ValidFAA registration status code V: Valid registration. All codes
N28082 Bellanca
17-30A
Fixed-wing, single engine Individual owner
California
Standard 2013-06-24 ValidFAA registration status code V: Valid registration. All codes
N4483R Cessna
A185F
Fixed-wing, single engine Individual owner
Alaska
Standard 2013-06-21 ValidFAA registration status code V: Valid registration. All codes
N555PZ Beech
V35B
Fixed-wing, single engine Lada Aviation LLC
Alpine, Utah
Standard 2013-06-21 ValidFAA registration status code V: Valid registration. All codes
N2135W Beech
V35B
Fixed-wing, single engine Individual owner
Texas
Standard 2013-06-18 ValidFAA registration status code V: Valid registration. All codes
N3051A Beech
V35A
Fixed-wing, single engine Individual owner
Colorado
Standard 2013-06-18 ValidFAA registration status code V: Valid registration. All codes
N3300G Beech
58
Fixed-wing, multi-engine Air Amg LLC
Greensboro, North Carolina
Standard 2013-06-18 ValidFAA registration status code V: Valid registration. All codes
N4144S Beech
A36
Fixed-wing, single engine Jlh Ent LLC
Wilmington, Delaware
Standard 2013-06-13 ValidFAA registration status code V: Valid registration. All codes
N4794F Cessna
P206B
Fixed-wing, single engine Get Out Aviation LLC
Palmer, Alaska
Standard 2013-06-12 ValidFAA registration status code V: Valid registration. All codes
N481TR Cessna
U206G
Fixed-wing, single engine Individual owner
Texas
Standard 2013-06-04 ValidFAA registration status code V: Valid registration. All codes
N758F Cessna
U206G
Fixed-wing, single engine Capital Aircraft LLC
Juneau, Alaska
Standard 2013-05-29 ValidFAA registration status code V: Valid registration. All codes
N133MD Beech
F33A
Fixed-wing, single engine Individual owner
Colorado
Standard 2013-05-28 ValidFAA registration status code V: Valid registration. All codes
N4915C Cessna
A185F
Fixed-wing, single engine Individual owner
Texas
Standard 2013-05-28 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.