The U.S. aircraft register, updated daily
Engines · piston (reciprocating) · data as of October 9, 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
N4955Y Cessna
210N
Fixed-wing, single engine Individual owner
North Carolina
Standard 2001-07-31 ValidFAA registration status code V: Valid registration. All codes
N756JG Cessna
U206G
Fixed-wing, single engine Neal J Mckenny CORP INC
Fortuna, California
Standard 2001-07-31 ValidFAA registration status code V: Valid registration. All codes
N999FB Beech
A36
Fixed-wing, single engine Individual owner
New York
Standard 2001-07-30 ValidFAA registration status code V: Valid registration. All codes
N5844S Beech
S35
Fixed-wing, single engine Individual owner
Nebraska
Standard 2001-07-27 ValidFAA registration status code V: Valid registration. All codes
N8253C Beech
F33A
Fixed-wing, single engine Al Stevens Construction LLC
Overland Park, Kansas
Standard 2001-07-27 ValidFAA registration status code V: Valid registration. All codes
N17RE Beech
F33A
Fixed-wing, single engine Individual owner
Virginia
Standard 2001-07-25 ValidFAA registration status code V: Valid registration. All codes
N61298 Cessna
A185F
Fixed-wing, single engine Arizona Game and Fish Department
Phoenix, Arizona
Standard 2001-07-24 ValidFAA registration status code V: Valid registration. All codes
N7792R Beech
E33A
Fixed-wing, single engine Individual owner
Florida
Standard 2001-07-20 ValidFAA registration status code V: Valid registration. All codes
N85AJ Cessna
A185F
Fixed-wing, single engine Bha Leasing INC
South Portland, Maine
Standard 2001-07-11 ValidFAA registration status code V: Valid registration. All codes
N49MD Beech
95-C55
Fixed-wing, multi-engine Individual owner
Arizona
Standard 2001-07-10 ValidFAA registration status code V: Valid registration. All codes
N8229M Cessna
210K
Fixed-wing, single engine Individual owner
Georgia
Standard 2001-06-27 ValidFAA registration status code V: Valid registration. All codes
N66849 Beech
58
Fixed-wing, multi-engine Hawk Aircraft Sales and Leasing LLC
Sterling Heights, Michigan
Standard 2001-06-20 ValidFAA registration status code V: Valid registration. All codes
N1338G Cessna
310R
Fixed-wing, multi-engine Wings Air Charter LLC
Wisconsin Rapids, Wisconsin
Standard 2001-06-15 ValidFAA registration status code V: Valid registration. All codes
N375PW Cessna
A185F
Fixed-wing, single engine Co-owned owner
Alaska
Standard 2001-06-13 ValidFAA registration status code V: Valid registration. All codes
N1748U Cessna
207
Fixed-wing, single engine Iliamna Air Taxi INC
Iliamna, Alaska
Standard 2001-06-11 ValidFAA registration status code V: Valid registration. All codes
N587PD Beech
F33A
Fixed-wing, single engine Turbulence INC
Wilmington, Delaware
Standard 2001-06-07 ValidFAA registration status code V: Valid registration. All codes
N11179 Cessna
A185F
Fixed-wing, single engine Individual owner
California
Standard 2001-06-01 ValidFAA registration status code V: Valid registration. All codes
N7392R Beech
A36
Fixed-wing, single engine Individual owner
Texas
Standard 2001-05-31 ValidFAA registration status code V: Valid registration. All codes
N7888S Beech
F33A
Fixed-wing, single engine Hangar One Lc
Clear Lake, Iowa
Standard 2001-05-24 ValidFAA registration status code V: Valid registration. All codes
N17US Beech
A36
Fixed-wing, single engine Marmac INC
Hellertown, Pennsylvania
Standard 2001-05-23 ValidFAA registration status code V: Valid registration. All codes
N983GT Beech
F33A
Fixed-wing, single engine One Echo Romeo INC
Sandy Springs, Georgia
Standard 2001-05-19 ValidFAA registration status code V: Valid registration. All codes
N9288Q Beech
A36
Fixed-wing, single engine Individual owner
California
Standard 2001-05-17 ValidFAA registration status code V: Valid registration. All codes
N4417W Beech
A36
Fixed-wing, single engine Individual owner
Montana
Standard 2001-05-15 ValidFAA registration status code V: Valid registration. All codes
N24BE Beech
A36
Fixed-wing, single engine Mystic Knights of the Air Lodge INC
Canton, Mississippi
Standard 2001-05-10 ValidFAA registration status code V: Valid registration. All codes
N8216J Cessna
A185F
Fixed-wing, single engine Individual owner
Alaska
Standard 2001-05-10 ValidFAA registration status code V: Valid registration. All codes
N66WC Beech
V35B
Fixed-wing, single engine Individual owner
Tennessee
Standard 2001-05-02 ValidFAA registration status code V: Valid registration. All codes
N234JE Beech
F33A
Fixed-wing, single engine Aimrich Enterprises
Wilmington, Delaware
Standard 2001-04-27 ValidFAA registration status code V: Valid registration. All codes
N511JB Cessna
A185F
Fixed-wing, single engine Plp Aircraft Classics LLC
Wilmington, Delaware
Standard 2001-04-27 ValidFAA registration status code V: Valid registration. All codes
N1373F Cessna
A185F
Fixed-wing, single engine Individual owner
Texas
Standard 2001-04-23 ValidFAA registration status code V: Valid registration. All codes
N3685Y Cessna
210C
Fixed-wing, single engine Individual owner
California
Experimental 2001-04-19 ValidFAA registration status code V: Valid registration. All codes
N60617 Cessna
210L
Fixed-wing, single engine Individual owner
New York
Standard 2001-04-19 ValidFAA registration status code V: Valid registration. All codes
N111MA Beech
E-55
Fixed-wing, multi-engine Aero Quest INC
Brooklyn, New York
Standard 2001-04-14 ValidFAA registration status code V: Valid registration. All codes
N142CT Cessna
310R
Fixed-wing, multi-engine Individual owner
Indiana
Standard 2001-03-22 ValidFAA registration status code V: Valid registration. All codes
N1687W Beech
A36
Fixed-wing, single engine Airway Management INC
Wilmington, Delaware
Standard 2001-03-14 ValidFAA registration status code V: Valid registration. All codes
N4685F Cessna
P206A
Fixed-wing, single engine Individual owner
Michigan
Standard 2001-03-01 ValidFAA registration status code V: Valid registration. All codes
N777CZ Beech
E-55
Fixed-wing, multi-engine Individual owner
Mississippi
Standard 2001-03-01 ValidFAA registration status code V: Valid registration. All codes
N9045Q Beech
A36
Fixed-wing, single engine Individual owner
Texas
Standard 2001-02-22 ValidFAA registration status code V: Valid registration. All codes
N206PB Cessna
U206G
Fixed-wing, single engine Individual owner
Florida
Standard 2001-02-16 ValidFAA registration status code V: Valid registration. All codes
N9405R Cessna
U206G
Fixed-wing, single engine Individual owner
Oklahoma
Standard 2001-02-14 ValidFAA registration status code V: Valid registration. All codes
N113JL Beech
V35
Fixed-wing, single engine Individual owner
Michigan
Standard 2001-02-01 ValidFAA registration status code V: Valid registration. All codes
N3358A Beech
V35A
Fixed-wing, single engine Individual owner
Texas
Standard 2001-01-31 ValidFAA registration status code V: Valid registration. All codes
N1285F Cessna
A185F
Fixed-wing, single engine Individual owner
Tennessee
Standard 2001-01-25 ValidFAA registration status code V: Valid registration. All codes
N9020V Beech
E-55
Fixed-wing, multi-engine Individual owner
Wisconsin
Standard 2001-01-23 ValidFAA registration status code V: Valid registration. All codes
N281RC Bellanca
17-30A
Fixed-wing, single engine Individual owner
North Dakota
Standard 2001-01-22 ValidFAA registration status code V: Valid registration. All codes
N8602Q Beech
S35
Fixed-wing, single engine Co-owned owner
California
Standard 2001-01-05 ValidFAA registration status code V: Valid registration. All codes
N754P Beech
A36
Fixed-wing, single engine Mid Continent Harley Davidson INC
Wichita, Kansas
Standard 2000-12-16 ValidFAA registration status code V: Valid registration. All codes
N4133B Bellanca
17-30A
Fixed-wing, single engine Machinerywatch.Com INC
Louisa, Virginia
Standard 2000-12-12 ValidFAA registration status code V: Valid registration. All codes
N6555Y Cessna
210N
Fixed-wing, single engine Individual owner
Texas
Standard 2000-12-08 ValidFAA registration status code V: Valid registration. All codes
N6840Q Beech
S35
Fixed-wing, single engine Idell Enterprises LLC
Wilmington, Delaware
Standard 2000-12-04 ValidFAA registration status code V: Valid registration. All codes
N61919 Cessna
A185F
Fixed-wing, single engine Tailspin LLC
Belle Chasse, Louisiana
Standard 2000-11-28 ValidFAA registration status code V: Valid registration. All codes
N2061A Beech
A36
Fixed-wing, single engine Individual owner
Montana
Standard 2000-11-27 ValidFAA registration status code V: Valid registration. All codes
N85FS Beech
58
Fixed-wing, multi-engine 7353R CO Partnership
Pottstown, Pennsylvania
Standard 2000-11-27 ValidFAA registration status code V: Valid registration. All codes
N178Q Beech
S35
Fixed-wing, single engine Rega Consulting INC
Port Orange, Florida
Standard 2000-11-15 ValidFAA registration status code V: Valid registration. All codes
N3868Q Cessna
A185F
Fixed-wing, single engine Libbys Sporting Camps INC
Chapman, Maine
Standard 2000-11-06 ValidFAA registration status code V: Valid registration. All codes
N6067S Beech
F33A
Fixed-wing, single engine Canterbury Ventures LLC
Litchfield Park, Arizona
Standard 2000-11-03 ValidFAA registration status code V: Valid registration. All codes
N6745M Beech
58
Fixed-wing, multi-engine Perkins Communication LLC
Northport, Alabama
Standard 2000-10-30 ValidFAA registration status code V: Valid registration. All codes
N70341 Cessna
A185F
Fixed-wing, single engine Michels LLC
Wasilla, Alaska
Standard 2000-10-27 ValidFAA registration status code V: Valid registration. All codes
N70091 Cessna
A185E
Fixed-wing, single engine Individual owner
Alaska
Multiple 2000-10-26 ValidFAA registration status code V: Valid registration. All codes
N1926Q Cessna
A185F
Fixed-wing, single engine Co-owned owner
Alaska
Standard 2000-10-25 ValidFAA registration status code V: Valid registration. All codes
N334JD Beech
F33A
Fixed-wing, single engine Golden Bear Properties LLC
Lakeside, Arizona
Standard 2000-10-20 ValidFAA registration status code V: Valid registration. All codes
N20AC Beech
V35B
Fixed-wing, single engine Owen Ray L
Los Gatos, California
Standard 2000-09-28 ValidFAA registration status code V: Valid registration. All codes
N4830V Bellanca
17-30
Fixed-wing, single engine Individual owner
Texas
Standard 2000-09-27 ValidFAA registration status code V: Valid registration. All codes
N123RL Aero Commander
200D
Fixed-wing, single engine Individual owner
New York
Standard 2000-09-22 ValidFAA registration status code V: Valid registration. All codes
N5494E Cessna
A185F
Fixed-wing, single engine Bloom William K
Wrangell, Alaska
Standard 2000-09-21 ValidFAA registration status code V: Valid registration. All codes
N70DW Beech
S35
Fixed-wing, single engine Clear Skies LLC
Jacksonville, Florida
Standard 2000-09-21 ValidFAA registration status code V: Valid registration. All codes
N178VV Cessna
A185E
Fixed-wing, single engine Co-owned owner
California
Standard 2000-09-19 ValidFAA registration status code V: Valid registration. All codes
N3838G Cessna
U206B
Fixed-wing, single engine Golden Eagle Outfitters INC
Delta Junction, Alaska
Standard 2000-09-14 ValidFAA registration status code V: Valid registration. All codes
N54TC Beech
F33A
Fixed-wing, single engine Co-owned owner
Illinois
Standard 2000-09-14 ValidFAA registration status code V: Valid registration. All codes
N6238V Beech
V35
Fixed-wing, single engine Individual owner
Washington
Standard 2000-09-13 ValidFAA registration status code V: Valid registration. All codes
N84735 Cessna
A185F
Fixed-wing, single engine Individual owner
Alaska
Standard 2000-09-12 ValidFAA registration status code V: Valid registration. All codes
N1541F Cessna
185D
Fixed-wing, single engine Rwr Air INC
Tok, Alaska
Multiple 2000-09-11 ValidFAA registration status code V: Valid registration. All codes
N826RS Beech
V35B
Fixed-wing, single engine Individual owner
Texas
Standard 2000-08-31 ValidFAA registration status code V: Valid registration. All codes
N31074 Beech
F33A
Fixed-wing, single engine Hale Aviation INC
Saint Augustine, Florida
Standard 2000-08-29 ValidFAA registration status code V: Valid registration. All codes
N731KW Cessna
A188B
Fixed-wing, single engine Individual owner
North Carolina
Restricted 2000-08-28 ValidFAA registration status code V: Valid registration. All codes
N14XM Beech
58
Fixed-wing, multi-engine Medical Diagnostic Imaging INC
Sacramento, California
Standard 2000-08-25 ValidFAA registration status code V: Valid registration. All codes
N82JT Beech
S35
Fixed-wing, single engine Withheld at owner's request
Standard 2000-08-17 ValidFAA registration status code V: Valid registration. All codes
N45PT Beech
58
Fixed-wing, multi-engine Individual owner
Colorado
Standard 2000-08-16 ValidFAA registration status code V: Valid registration. All codes
N12Q Cessna
401
Fixed-wing, multi-engine Individual owner
Texas
Standard 2000-08-11 ValidFAA registration status code V: Valid registration. All codes
N78DB Beech
58
Fixed-wing, multi-engine Greenbrier Aviation LLC
Sevierville, Tennessee
Standard 2000-08-10 ValidFAA registration status code V: Valid registration. All codes
N88KS Beech
35-C33A
Fixed-wing, single engine Individual owner
Texas
Standard 2000-08-10 ValidFAA registration status code V: Valid registration. All codes
N468MS Cessna
210N
Fixed-wing, single engine Individual owner
Mississippi
Standard 2000-08-07 ValidFAA registration status code V: Valid registration. All codes
N4819Q Cessna
A188B
Fixed-wing, single engine Individual owner
Texas
Restricted 2000-08-04 ValidFAA registration status code V: Valid registration. All codes
N112MH Beech
A36
Fixed-wing, single engine Jsi Contractors INC
San Antonio, Texas
Standard 2000-07-26 ValidFAA registration status code V: Valid registration. All codes
N18MJ Beech
A36
Fixed-wing, single engine Co-owned owner
California
Standard 2000-07-24 ValidFAA registration status code V: Valid registration. All codes
N1688W Beech
V35B
Fixed-wing, single engine Djm Investments INC
Menno, South Dakota
Standard 2000-07-18 ValidFAA registration status code V: Valid registration. All codes
N33EJ Beech
F33A
Fixed-wing, single engine Individual owner
Mississippi
Standard 2000-07-18 ValidFAA registration status code V: Valid registration. All codes
N4878Q Cessna
A185F
Fixed-wing, single engine Co-owned owner
Alaska
Standard 2000-07-18 ValidFAA registration status code V: Valid registration. All codes
N6180C Cessna
310R
Fixed-wing, multi-engine Board of Trustees of Southern Illinois University
Murphysboro, Illinois
Standard 2000-07-18 ValidFAA registration status code V: Valid registration. All codes
N975QC Beech
V35B
Fixed-wing, single engine Individual owner
Texas
Standard 2000-07-17 ValidFAA registration status code V: Valid registration. All codes
N1234Y Cessna
A185F
Fixed-wing, single engine Individual owner
Arizona
Standard 2000-07-06 ValidFAA registration status code V: Valid registration. All codes
N4934E Cessna
A185F
Fixed-wing, single engine Individual owner
Illinois
Standard 2000-06-30 ValidFAA registration status code V: Valid registration. All codes
N222RZ Beech
58
Fixed-wing, multi-engine P & M Reis Trucking INC
Nantucket, Massachusetts
Standard 2000-06-28 ValidFAA registration status code V: Valid registration. All codes
N72395 Cessna
U206D
Fixed-wing, single engine Orion Works LTD
Denali Park, Alaska
Restricted 2000-06-26 ValidFAA registration status code V: Valid registration. All codes
N5277V Cessna
210L
Fixed-wing, single engine Co-owned owner
Illinois
Standard 2000-06-22 ValidFAA registration status code V: Valid registration. All codes
N957DF Cessna
A185F
Fixed-wing, single engine Northern Flight Expeditions LLC
Hopkins, Minnesota
Standard 2000-06-22 ValidFAA registration status code V: Valid registration. All codes
N2359F Cessna
210E
Fixed-wing, single engine Co-owned owner
Idaho
Standard 2000-06-21 ValidFAA registration status code V: Valid registration. All codes
N896SA Cessna
210K
Fixed-wing, single engine Switlik Aviation Maintenance INC
Fort Myers, Florida
Standard 2000-06-19 ValidFAA registration status code V: Valid registration. All codes
N8KW Beech
V35B
Fixed-wing, single engine Individual owner
Minnesota
Standard 2000-06-09 ValidFAA registration status code V: Valid registration. All codes
N7543N Beech
36
Fixed-wing, single engine Individual owner
Nebraska
Standard 2000-06-07 ValidFAA registration status code V: Valid registration. All codes
N17TC Cessna
210D
Fixed-wing, single engine Co-owned owner
Arkansas
Standard 2000-06-06 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 9, 2026. Horsepower and thrust are the FAA's figures for the series, not for a particular aircraft.