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
N21616 Cessna
A188B
Fixed-wing, single engine Individual owner
Kansas
Restricted 2008-09-29 ValidFAA registration status code V: Valid registration. All codes
N2921B Beech
S35
Fixed-wing, single engine Individual owner
California
Standard 2008-09-29 ValidFAA registration status code V: Valid registration. All codes
N4668M Beech
A36
Fixed-wing, single engine Beechcraft Heritage Museum
Tullahoma, Tennessee
Standard 2008-09-29 ValidFAA registration status code V: Valid registration. All codes
N17BR Beech
58
Fixed-wing, multi-engine Jds Management CO LLC
Warner Robins, Georgia
Standard 2008-09-24 ValidFAA registration status code V: Valid registration. All codes
N624DR Cessna
207A
Fixed-wing, single engine Ryan Air INC
Anchorage, Alaska
Standard 2008-09-17 ValidFAA registration status code V: Valid registration. All codes
N185S Cessna
A185F
Fixed-wing, single engine Co-owned owner
Michigan
Standard 2008-09-16 ValidFAA registration status code V: Valid registration. All codes
N222DR Beech
V35A
Fixed-wing, single engine Individual owner
California
Standard 2008-09-11 ValidFAA registration status code V: Valid registration. All codes
N81TP Cessna
210N
Fixed-wing, single engine Individual owner
Mississippi
Standard 2008-09-09 ValidFAA registration status code V: Valid registration. All codes
N8378N Beech
V35A
Fixed-wing, single engine Individual owner
Florida
Standard 2008-09-05 ValidFAA registration status code V: Valid registration. All codes
N1965S Beech
S35
Fixed-wing, single engine N1965S LLC
Williamstown, New Jersey
Standard 2008-09-04 ValidFAA registration status code V: Valid registration. All codes
N3806L Beech
A36
Fixed-wing, single engine Individual owner
Minnesota
Standard 2008-09-04 ValidFAA registration status code V: Valid registration. All codes
N1701R Cessna
A185F
Fixed-wing, single engine M R Planes LLC
Redmond, Washington
Standard 2008-09-03 ValidFAA registration status code V: Valid registration. All codes
N426DD Beech
58
Fixed-wing, multi-engine Rare Air Aviation Services LLC
Santa Rosa, California
Standard 2008-09-03 ValidFAA registration status code V: Valid registration. All codes
N61811 Cessna
A185F
Fixed-wing, single engine Individual owner
Alaska
Multiple 2008-09-02 ValidFAA registration status code V: Valid registration. All codes
N6356T Beech
F33A
Fixed-wing, single engine Tangoair LLC
Birmingham, Alabama
Standard 2008-09-02 ValidFAA registration status code V: Valid registration. All codes
N7BW Beech
A36
Fixed-wing, single engine 7Bw LLC
Lewes, Delaware
Standard 2008-08-26 ValidFAA registration status code V: Valid registration. All codes
N11JQ Beech
S35
Fixed-wing, single engine Individual owner
Tennessee
Standard 2008-08-22 ValidFAA registration status code V: Valid registration. All codes
N223D Beech
F33A
Fixed-wing, single engine Burch Construction CO INC
Ramona, California
Standard 2008-08-22 ValidFAA registration status code V: Valid registration. All codes
N37BC Cessna
A185F
Fixed-wing, single engine Individual owner
Alaska
Standard 2008-08-18 ValidFAA registration status code V: Valid registration. All codes
N404LF Beech
A36
Fixed-wing, single engine Individual owner
Texas
Standard 2008-08-07 ValidFAA registration status code V: Valid registration. All codes
N44CM Beech
V35A
Fixed-wing, single engine Individual owner
Vermont
Standard 2008-08-04 ValidFAA registration status code V: Valid registration. All codes
N881FD Cessna
A185F
Fixed-wing, single engine Daneco LLC
Houma, Louisiana
Standard 2008-08-01 ValidFAA registration status code V: Valid registration. All codes
N310FA Cessna
310R
Fixed-wing, multi-engine Co-owned owner
Missouri
Standard 2008-07-30 ValidFAA registration status code V: Valid registration. All codes
N318U Cessna
310R
Fixed-wing, multi-engine Traffic Law LLC
Tampa, Florida
Standard 2008-07-28 ValidFAA registration status code V: Valid registration. All codes
N4775M Beech
V35B
Fixed-wing, single engine J and J Consulting LLC
South Jamesport, New York
Standard 2008-07-21 ValidFAA registration status code V: Valid registration. All codes
N9655G Cessna
U206F
Fixed-wing, single engine Middle Fork Aviation INC
Challis, Idaho
Standard 2008-07-18 ValidFAA registration status code V: Valid registration. All codes
N888SH Beech
V35A
Fixed-wing, single engine Individual owner
Ohio
Standard 2008-07-16 ValidFAA registration status code V: Valid registration. All codes
N382MG Cessna
U206G
Fixed-wing, single engine Missionary Air Group INC
Burlington, North Carolina
Standard 2008-07-15 ValidFAA registration status code V: Valid registration. All codes
N185KM Cessna
A185F
Fixed-wing, single engine Individual owner
Massachusetts
Standard 2008-07-09 ValidFAA registration status code V: Valid registration. All codes
N2203L Beech
F33A
Fixed-wing, single engine Co-owned owner
Illinois
Standard 2008-07-09 ValidFAA registration status code V: Valid registration. All codes
N4466Q Cessna
A188B
Fixed-wing, single engine Individual owner
Montana
Standard 2008-07-09 ValidFAA registration status code V: Valid registration. All codes
N246WB Beech
V35A
Fixed-wing, single engine Individual owner
Montana
Standard 2008-07-08 ValidFAA registration status code V: Valid registration. All codes
N459JD Beech
A36
Fixed-wing, single engine Individual owner
California
Standard 2008-07-08 ValidFAA registration status code V: Valid registration. All codes
N7147N Beech
V35A
Fixed-wing, single engine Individual owner
California
Standard 2008-07-08 ValidFAA registration status code V: Valid registration. All codes
N318D Beech
95-C55
Fixed-wing, multi-engine Individual owner
Massachusetts
Standard 2008-07-07 ValidFAA registration status code V: Valid registration. All codes
N95AJ Beech
A36
Fixed-wing, single engine Avnuts LLC
Pawleys Island, South Carolina
Standard 2008-07-03 ValidFAA registration status code V: Valid registration. All codes
N969SB Cessna
U206F
Fixed-wing, single engine Individual owner
Minnesota
Standard 2008-07-02 ValidFAA registration status code V: Valid registration. All codes
N259J Beech
V35B
Fixed-wing, single engine Individual owner
Montana
Standard 2008-07-01 ValidFAA registration status code V: Valid registration. All codes
N6050T Beech
A36
Fixed-wing, single engine Gullett Aviation LLC
Palatka, Florida
Standard 2008-06-30 ValidFAA registration status code V: Valid registration. All codes
N80DF Beech
V35B
Fixed-wing, single engine Beadazzled LLC
Holland, Michigan
Standard 2008-06-27 ValidFAA registration status code V: Valid registration. All codes
N314U Cessna
310R
Fixed-wing, multi-engine Pro Aire Cargo & Consulting INC
Oshkosh, Wisconsin
Standard 2008-06-24 ValidFAA registration status code V: Valid registration. All codes
N756ET Cessna
A185E
Fixed-wing, single engine F&W Construction CO INC
Anchorage, Alaska
Standard 2008-06-24 ValidFAA registration status code V: Valid registration. All codes
N29173 Cessna
U206C
Fixed-wing, single engine Aerial Transport LLC
Wilmington, Delaware
Standard 2008-06-23 ValidFAA registration status code V: Valid registration. All codes
N50HW Cessna
U206G
Fixed-wing, single engine Individual owner
Florida
Standard 2008-06-20 ValidFAA registration status code V: Valid registration. All codes
N66719 Beech
A36
Fixed-wing, single engine Co-owned owner
North Carolina
Standard 2008-06-10 ValidFAA registration status code V: Valid registration. All codes
N7896S Cessna
U206B
Fixed-wing, single engine Individual owner
Louisiana
Standard 2008-06-10 ValidFAA registration status code V: Valid registration. All codes
N206SK Cessna
206
Fixed-wing, single engine Individual owner
Oklahoma
Standard 2008-05-28 ValidFAA registration status code V: Valid registration. All codes
N734CX Cessna
U206G
Fixed-wing, single engine Mount Crillon LLC
Juneau, Alaska
Standard 2008-05-28 ValidFAA registration status code V: Valid registration. All codes
N114PL Beech
F33A
Fixed-wing, single engine Individual owner
Maryland
Standard 2008-05-27 ValidFAA registration status code V: Valid registration. All codes
N707GB Cessna
310R
Fixed-wing, multi-engine Individual owner
Arizona
Standard 2008-05-27 ValidFAA registration status code V: Valid registration. All codes
N996V Beech
A36
Fixed-wing, single engine Individual owner
New Hampshire
Standard 2008-05-27 ValidFAA registration status code V: Valid registration. All codes
N57DY Bellanca
17-30A
Fixed-wing, single engine Individual owner
Wyoming
Standard 2008-05-22 ValidFAA registration status code V: Valid registration. All codes
N7639N Beech
36
Fixed-wing, single engine Individual owner
Texas
Standard 2008-05-21 ValidFAA registration status code V: Valid registration. All codes
N28128 Bellanca
17-30A
Fixed-wing, single engine Individual owner
Texas
Standard 2008-05-19 ValidFAA registration status code V: Valid registration. All codes
N5831R Beech
A36
Fixed-wing, single engine Individual owner
North Carolina
Standard 2008-05-16 ValidFAA registration status code V: Valid registration. All codes
N9553E Bellanca
17-30A
Fixed-wing, single engine Individual owner
California
Standard 2008-05-16 ValidFAA registration status code V: Valid registration. All codes
N69457 Cessna
340
Fixed-wing, multi-engine Individual owner
Texas
Standard 2008-05-15 ValidFAA registration status code V: Valid registration. All codes
N7493N Beech
D55
Fixed-wing, multi-engine Bdm Air LLC
Keller, Texas
Standard 2008-05-14 ValidFAA registration status code V: Valid registration. All codes
N8847V Bellanca
17-30A
Fixed-wing, single engine Individual owner
Texas
Standard 2008-05-13 ValidFAA registration status code V: Valid registration. All codes
N811PB Beech
58
Fixed-wing, multi-engine Mathis Timber LLC
Corinth, Mississippi
Standard 2008-05-09 ValidFAA registration status code V: Valid registration. All codes
N93035 Cessna
210L
Fixed-wing, single engine Des Aircraft LLC
Marianna, Arkansas
Standard 2008-05-09 ValidFAA registration status code V: Valid registration. All codes
N88TJ Beech
F33A
Fixed-wing, single engine Individual owner
Washington
Standard 2008-05-08 ValidFAA registration status code V: Valid registration. All codes
N815V Cessna
A185F
Fixed-wing, single engine Nordic Air LLC
Petersburg, Alaska
Standard 2008-05-02 ValidFAA registration status code V: Valid registration. All codes
N35EK Beech
V35B
Fixed-wing, single engine Individual owner
Massachusetts
Standard 2008-04-30 ValidFAA registration status code V: Valid registration. All codes
N9039V Beech
A36
Fixed-wing, single engine Individual owner
Texas
Standard 2008-04-25 ValidFAA registration status code V: Valid registration. All codes
N4091S Beech
F33A
Fixed-wing, single engine Beechcraft Heritage Museum
Tullahoma, Tennessee
Standard 2008-04-24 ValidFAA registration status code V: Valid registration. All codes
N1574P Cessna
210L
Fixed-wing, single engine Southern Seaplane INC
Belle Chasse, Louisiana
Standard 2008-04-18 ValidFAA registration status code V: Valid registration. All codes
N321RR Beech
D55
Fixed-wing, multi-engine 321 RR LP
Wimberley, Texas
Standard 2008-04-08 ValidFAA registration status code V: Valid registration. All codes
N1598W Beech
V35B
Fixed-wing, single engine Canvasback Investments LLC
Kerrville, Texas
Standard 2008-04-03 ValidFAA registration status code V: Valid registration. All codes
N206JJ Cessna
U206C
Fixed-wing, single engine Individual owner
Idaho
Standard 2008-03-19 ValidFAA registration status code V: Valid registration. All codes
N1530W Beech
V35B
Fixed-wing, single engine Mather Aviation LLC
Rancho Cordova, California
Standard 2008-03-07 ValidFAA registration status code V: Valid registration. All codes
N34EM Beech
A45
Fixed-wing, single engine Spirit Rotorcraft LLC
Phoenix, Arizona
Standard 2008-03-07 ValidFAA registration status code V: Valid registration. All codes
N3994Y Cessna
210D
Fixed-wing, single engine Crosco LLC
Canton, Ohio
Standard 2008-03-03 ValidFAA registration status code V: Valid registration. All codes
N6486N Beech
F33A
Fixed-wing, single engine Tennessee Aviation CO LLC
Knoxville, Tennessee
Standard 2008-03-03 ValidFAA registration status code V: Valid registration. All codes
N1097W Beech
A36
Fixed-wing, single engine Fred Wacker Agency INC
Miles City, Montana
Standard 2008-02-26 ValidFAA registration status code V: Valid registration. All codes
N4484W Beech
V35B
Fixed-wing, single engine Withheld at owner's request
Standard 2008-02-21 ValidFAA registration status code V: Valid registration. All codes
N526MP Cessna
210E
Fixed-wing, single engine S Brown INC
Durant, Oklahoma
Standard 2008-02-21 ValidFAA registration status code V: Valid registration. All codes
N731FP Cessna
A188B
Fixed-wing, single engine Individual owner
Iowa
Restricted 2008-02-20 ValidFAA registration status code V: Valid registration. All codes
N6332S Beech
E-55
Fixed-wing, multi-engine Co-owned owner
New Mexico
Standard 2008-02-19 ValidFAA registration status code V: Valid registration. All codes
N1859P Beech
A36
Fixed-wing, single engine 1859P LLC
Fulton, Missouri
Standard 2008-02-15 ValidFAA registration status code V: Valid registration. All codes
N242FF Beech
V35B
Fixed-wing, single engine Individual owner
Texas
Standard 2008-02-01 ValidFAA registration status code V: Valid registration. All codes
N933A Beech
F33A
Fixed-wing, single engine Rah Aviation INC
Fort Myers, Florida
Standard 2008-01-25 ValidFAA registration status code V: Valid registration. All codes
N67352 Beech
58
Fixed-wing, multi-engine Ascension Aviation LLC
Gaylord, Michigan
Standard 2008-01-24 ValidFAA registration status code V: Valid registration. All codes
N414DC Cessna
414
Fixed-wing, multi-engine Daddys Three LLC
Farmington, West Virginia
Standard 2008-01-22 ValidFAA registration status code V: Valid registration. All codes
N5815F Cessna
210F
Fixed-wing, single engine Individual owner
Minnesota
Standard 2008-01-22 ValidFAA registration status code V: Valid registration. All codes
N4724Q Cessna
A185F
Fixed-wing, single engine Individual owner
Washington
Standard 2008-01-17 ValidFAA registration status code V: Valid registration. All codes
N774BD Beech
A36
Fixed-wing, single engine Individual owner
Texas
Standard 2008-01-16 ValidFAA registration status code V: Valid registration. All codes
N103LH Beech
58
Fixed-wing, multi-engine Kavalair LLC Series D
Marion, Montana
Standard 2008-01-14 ValidFAA registration status code V: Valid registration. All codes
N25642 Beech
F33A
Fixed-wing, single engine Co-owned owner
Montana
Standard 2008-01-10 ValidFAA registration status code V: Valid registration. All codes
N357CE Meyers Industries Inc
200B
Fixed-wing, single engine Individual owner
California
Standard 2008-01-10 ValidFAA registration status code V: Valid registration. All codes
N3827Y Cessna
210D
Fixed-wing, single engine Individual owner
California
Standard 2008-01-09 ValidFAA registration status code V: Valid registration. All codes
N74SK Beech
V35
Fixed-wing, single engine Koontz Construction INC
Livingston, Montana
Standard 2008-01-07 ValidFAA registration status code V: Valid registration. All codes
N9170Q Beech
F33A
Fixed-wing, single engine King Air Properties LLC
Huntington Beach, California
Standard 2008-01-07 ValidFAA registration status code V: Valid registration. All codes
N6322A Beech
F33A
Fixed-wing, single engine Individual owner
Colorado
Standard 2008-01-04 ValidFAA registration status code V: Valid registration. All codes
N9035Q Beech
F33A
Fixed-wing, single engine Brown Vintage Airlines LLC
Mansfield, Ohio
Standard 2007-12-28 ValidFAA registration status code V: Valid registration. All codes
N367BC Beech
F33A
Fixed-wing, single engine Vc Air LLC
Midland, Texas
Standard 2007-12-26 ValidFAA registration status code V: Valid registration. All codes
N6525 Beech
A36
Fixed-wing, single engine Sacramento Computer Power INC
Sacramento, California
Standard 2007-12-21 ValidFAA registration status code V: Valid registration. All codes
N17FE Beech
V35B
Fixed-wing, single engine Co-owned owner
Indiana
Standard 2007-12-07 ValidFAA registration status code V: Valid registration. All codes
N222SM Beech
V35B
Fixed-wing, single engine Co-owned owner
California
Standard 2007-12-05 ValidFAA registration status code V: Valid registration. All codes
N2763T Beech
V35
Fixed-wing, single engine Individual owner
Ohio
Standard 2007-12-04 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.