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
N9137S Beech
A36
Fixed-wing, single engine Individual owner
California
Standard 2019-04-19 ValidFAA registration status code V: Valid registration. All codes
N664T Beech
V35B
Fixed-wing, single engine Individual owner
California
Standard 2019-04-18 ValidFAA registration status code V: Valid registration. All codes
N2776T Beech
V35
Fixed-wing, single engine Individual owner
New Mexico
Standard 2019-04-16 ValidFAA registration status code V: Valid registration. All codes
N853 Beech
V35B
Fixed-wing, single engine Cameo Marketing INC
Ellsworth, Maine
Standard 2019-04-16 ValidFAA registration status code V: Valid registration. All codes
N18463 Beech
A36
Fixed-wing, single engine Individual owner
Kentucky
Standard 2019-04-15 ValidFAA registration status code V: Valid registration. All codes
N3802X Beech
F33A
Fixed-wing, single engine Individual owner
North Carolina
Standard 2019-04-12 ValidFAA registration status code V: Valid registration. All codes
N3847Y Cessna
210D
Fixed-wing, single engine Individual owner
Texas
Standard 2019-04-11 ValidFAA registration status code V: Valid registration. All codes
N3SV Beech
V35
Fixed-wing, single engine Co-owned owner
Ohio
Standard 2019-04-11 ValidFAA registration status code V: Valid registration. All codes
N1750R Cessna
A185F
Fixed-wing, single engine Individual owner
Alaska
Multiple 2019-04-10 ValidFAA registration status code V: Valid registration. All codes
N3177V Cessna
150M
Fixed-wing, single engine Individual owner
Utah
Standard 2019-04-10 ValidFAA registration status code V: Valid registration. All codes
N9644G Cessna
U206F
Fixed-wing, single engine Katmai Air LLC
Anchorage, Alaska
Restricted 2019-04-10 ValidFAA registration status code V: Valid registration. All codes
N13WS Cessna
A185F
Fixed-wing, single engine Individual owner
Texas
Standard 2019-04-09 ValidFAA registration status code V: Valid registration. All codes
N36DE Beech
A36
Fixed-wing, single engine Major Tom LLC
Grottoes, Virginia
Standard 2019-04-09 ValidFAA registration status code V: Valid registration. All codes
N8719Z Cessna
TP206C
Fixed-wing, single engine Individual owner
Wisconsin
Standard 2019-04-09 ValidFAA registration status code V: Valid registration. All codes
N9626G Cessna
U206F
Fixed-wing, single engine Fly 2 Crp LLC
Cleveland, Texas
Standard 2019-04-09 ValidFAA registration status code V: Valid registration. All codes
N71ES Cessna
U206D
Fixed-wing, single engine Big Tex LLC
Reedsburg, Wisconsin
Standard 2019-04-08 ValidFAA registration status code V: Valid registration. All codes
N23523 Beech
A36
Fixed-wing, single engine Fox & Bear Air Charters LLC
South Padre Island, Texas
Standard 2019-04-05 ValidFAA registration status code V: Valid registration. All codes
N8219M Cessna
210K
Fixed-wing, single engine Fair Winds Group LLC
Portage, Michigan
Standard 2019-04-05 ValidFAA registration status code V: Valid registration. All codes
N1129T Beech
V35B
Fixed-wing, single engine Individual owner
Indiana
Standard 2019-04-04 ValidFAA registration status code V: Valid registration. All codes
N1815F Beech
A36
Fixed-wing, single engine Iss Holdings LLC
Lady Lake, Florida
Standard 2019-04-04 ValidFAA registration status code V: Valid registration. All codes
N55WR Beech
S35
Fixed-wing, single engine Neumann Capital Holdings LLC
Bossier City, Louisiana
Standard 2019-04-04 ValidFAA registration status code V: Valid registration. All codes
N71994 Cessna
U206D
Fixed-wing, single engine Skydive Buckeye LLC
Goodyear, Arizona
Standard 2019-04-04 ValidFAA registration status code V: Valid registration. All codes
N136JW Beech
A36
Fixed-wing, single engine Three Mayhoods LLC
Bonita Springs, Florida
Standard 2019-04-03 ValidFAA registration status code V: Valid registration. All codes
N185NH Cessna
A185E
Fixed-wing, single engine Equinox Air LLC
Thorne Bay, Alaska
Standard 2019-04-03 ValidFAA registration status code V: Valid registration. All codes
N1279R Bellanca
17-30A
Fixed-wing, single engine Sedona Aviation LLC
Sedona, Arizona
Standard 2019-04-02 ValidFAA registration status code V: Valid registration. All codes
N851K Beech
F33C
Fixed-wing, single engine Protac Aviation LLC
Jackson, Wyoming
Standard 2019-04-02 ValidFAA registration status code V: Valid registration. All codes
N8NG Beech
58
Fixed-wing, multi-engine Retail Contracting Group INC
Oakdale, Minnesota
Standard 2019-04-02 ValidFAA registration status code V: Valid registration. All codes
N72045 Beech
F33A
Fixed-wing, single engine Pembroke Flyers LLC
Pembroke, New Hampshire
Standard 2019-04-01 ValidFAA registration status code V: Valid registration. All codes
N8397Q Cessna
U206F
Fixed-wing, single engine Seattle Seaplanes LLC
Seattle, Washington
Standard 2019-04-01 ValidFAA registration status code V: Valid registration. All codes
N17HS Cessna
210G
Fixed-wing, single engine Red Oak Centurion LLC
Red Oak, Iowa
Standard 2019-03-30 ValidFAA registration status code V: Valid registration. All codes
N72222 Cessna
U206D
Fixed-wing, single engine Individual owner
Alaska
Standard 2019-03-29 ValidFAA registration status code V: Valid registration. All codes
N9186Q Beech
F33A
Fixed-wing, single engine Individual owner
California
Standard 2019-03-29 ValidFAA registration status code V: Valid registration. All codes
N53044 Cessna
A185F
Fixed-wing, single engine Trophy Down LLC
Punta Gorda, Florida
Standard 2019-03-27 ValidFAA registration status code V: Valid registration. All codes
N552B Beech
V35
Fixed-wing, single engine Individual owner
Arizona
Standard 2019-03-27 ValidFAA registration status code V: Valid registration. All codes
N1797R Cessna
U206G
Fixed-wing, single engine Northstar Holdings LLC
Anchorage, Alaska
Standard 2019-03-26 ValidFAA registration status code V: Valid registration. All codes
N2292L Beech
V35B
Fixed-wing, single engine Individual owner
California
Standard 2019-03-26 ValidFAA registration status code V: Valid registration. All codes
N25632 Beech
V35B
Fixed-wing, single engine Individual owner
Nevada
Standard 2019-03-26 ValidFAA registration status code V: Valid registration. All codes
N2771T Beech
V35
Fixed-wing, single engine Individual owner
Michigan
Standard 2019-03-26 ValidFAA registration status code V: Valid registration. All codes
N6652Y Beech
A36
Fixed-wing, single engine Individual owner
Oregon
Standard 2019-03-26 ValidFAA registration status code V: Valid registration. All codes
N11FF Beech
D55
Fixed-wing, multi-engine Jet Speed Aviation INC
Las Vegas, Nevada
Standard 2019-03-25 ValidFAA registration status code V: Valid registration. All codes
N3921Y Cessna
210D
Fixed-wing, single engine Co-owned owner
Texas
Standard 2019-03-25 ValidFAA registration status code V: Valid registration. All codes
N4494S Beech
A36
Fixed-wing, single engine Individual owner
Florida
Standard 2019-03-25 ValidFAA registration status code V: Valid registration. All codes
N6051M Beech
A36
Fixed-wing, single engine Ebe INC
East Moline, Illinois
Standard 2019-03-25 ValidFAA registration status code V: Valid registration. All codes
N4272Q Cessna
U206F
Fixed-wing, single engine Co-owned owner
Alaska
Multiple 2019-03-23 ValidFAA registration status code V: Valid registration. All codes
N5661K Beech
S35
Fixed-wing, single engine Individual owner
Florida
Standard 2019-03-23 ValidFAA registration status code V: Valid registration. All codes
N7951R Beech
36
Fixed-wing, single engine Individual owner
Tennessee
Standard 2019-03-23 ValidFAA registration status code V: Valid registration. All codes
N1044W Beech
V35B
Fixed-wing, single engine Angier 66 LLC
Durham, North Carolina
Standard 2019-03-20 ValidFAA registration status code V: Valid registration. All codes
N535VB Beech
V35B
Fixed-wing, single engine Individual owner
Florida
Standard 2019-03-20 ValidFAA registration status code V: Valid registration. All codes
N210TH Cessna
210M
Fixed-wing, single engine Co-owned owner
Texas
Standard 2019-03-19 ValidFAA registration status code V: Valid registration. All codes
N2163L Beech
A36
Fixed-wing, single engine S & S Southern Group INC
Port Orange, Florida
Standard 2019-03-19 ValidFAA registration status code V: Valid registration. All codes
N4141A Cessna
310R
Fixed-wing, multi-engine Lady Bird of Rhinebeck LLC
Rhinebeck, New York
Standard 2019-03-19 ValidFAA registration status code V: Valid registration. All codes
N5745K Beech
S35
Fixed-wing, single engine Green Mountain Avionics INC
Middlebury, Vermont
Standard 2019-03-19 ValidFAA registration status code V: Valid registration. All codes
N756MP Cessna
U206G
Fixed-wing, single engine Co-owned owner
Alaska
Standard 2019-03-18 ValidFAA registration status code V: Valid registration. All codes
N3707Q Beech
V35
Fixed-wing, single engine Individual owner
Kansas
Standard 2019-03-16 ValidFAA registration status code V: Valid registration. All codes
N427PW Beech
V35B
Fixed-wing, single engine Individual owner
South Carolina
Standard 2019-03-16 ValidFAA registration status code V: Valid registration. All codes
N9463Q Beech
V35B
Fixed-wing, single engine Ccf Ventures INC
Bangor, Maine
Standard 2019-03-16 ValidFAA registration status code V: Valid registration. All codes
N194A Beech
F33A
Fixed-wing, single engine Individual owner
Florida
Standard 2019-03-15 ValidFAA registration status code V: Valid registration. All codes
N2429E Cessna
A185E
Fixed-wing, single engine Individual owner
Alaska
Standard 2019-03-15 ValidFAA registration status code V: Valid registration. All codes
N4764M Beech
F33A
Fixed-wing, single engine Individual owner
Pennsylvania
Standard 2019-03-15 ValidFAA registration status code V: Valid registration. All codes
N75AM Beech
E-55
Fixed-wing, multi-engine Airjohn LLC
Cheyenne, Wyoming
Standard 2019-03-15 ValidFAA registration status code V: Valid registration. All codes
N9421S Beech
V35
Fixed-wing, single engine Individual owner
Missouri
Standard 2019-03-15 ValidFAA registration status code V: Valid registration. All codes
N14908 Bellanca
17-30A
Fixed-wing, single engine Individual owner
Virginia
Standard 2019-03-13 ValidFAA registration status code V: Valid registration. All codes
N2980A Beech
V35B
Fixed-wing, single engine Individual owner
Oklahoma
Standard 2019-03-13 ValidFAA registration status code V: Valid registration. All codes
N7343V Bellanca
17-30
Fixed-wing, single engine Individual owner
Texas
Standard 2019-03-13 ValidFAA registration status code V: Valid registration. All codes
N142S Beech
58
Fixed-wing, multi-engine Med Care INC
Grand Island, Nebraska
Standard 2019-03-12 ValidFAA registration status code V: Valid registration. All codes
N228Q Beech
V35
Fixed-wing, single engine Dodson International Parts INC
Rantoul, Kansas
Standard 2019-03-11 ValidFAA registration status code V: Valid registration. All codes
N5631S Beech
35-C33A
Fixed-wing, single engine Co-owned owner
Oklahoma
Standard 2019-03-11 ValidFAA registration status code V: Valid registration. All codes
N21WP Beech
A36
Fixed-wing, single engine Air Dryden LLC
Dothan, Alabama
Standard 2019-03-09 ValidFAA registration status code V: Valid registration. All codes
N3738Y Cessna
210D
Fixed-wing, single engine Airborne Solutions Group LLC
Dayton, Ohio
Standard 2019-03-09 ValidFAA registration status code V: Valid registration. All codes
N4302W Beech
V35B
Fixed-wing, single engine Individual owner
Ohio
Standard 2019-03-08 ValidFAA registration status code V: Valid registration. All codes
N6311Z Beech
F33A
Fixed-wing, single engine Individual owner
South Carolina
Standard 2019-03-08 ValidFAA registration status code V: Valid registration. All codes
N6684D Beech
A36
Fixed-wing, single engine Downey Leasing LLC
Lexington, Nebraska
Standard 2019-03-08 ValidFAA registration status code V: Valid registration. All codes
N10RV Cessna
210D
Fixed-wing, single engine Individual owner
Mississippi
Standard 2019-03-07 ValidFAA registration status code V: Valid registration. All codes
N9AP Piper
PA-23-250
Fixed-wing, multi-engine Wellsville Flying Service INC
Wellsville, New York
Standard 2019-03-07 ValidFAA registration status code V: Valid registration. All codes
N1564A Beech
F33A
Fixed-wing, single engine Individual owner
Indiana
Standard 2019-03-06 ValidFAA registration status code V: Valid registration. All codes
N700DC Beech
A36
Fixed-wing, single engine Co-owned owner
Minnesota
Standard 2019-03-06 ValidFAA registration status code V: Valid registration. All codes
N2632B Cessna
310R
Fixed-wing, multi-engine Heubeck Associates INC
New York, New York
Standard 2019-03-05 ValidFAA registration status code V: Valid registration. All codes
N48LE Beech
36
Fixed-wing, single engine Co-owned owner
Tennessee
Standard 2019-03-05 ValidFAA registration status code V: Valid registration. All codes
N310DF Cessna
310R
Fixed-wing, multi-engine Jordan Air INC
Hugoton, Kansas
Standard 2019-03-04 ValidFAA registration status code V: Valid registration. All codes
N1816F Cessna
210F
Fixed-wing, single engine Co-owned owner
Washington
Standard 2019-03-02 ValidFAA registration status code V: Valid registration. All codes
N222CB Beech
V35A
Fixed-wing, single engine Niki Hankins Consulting LLC
Colorado Springs, Colorado
Standard 2019-03-02 ValidFAA registration status code V: Valid registration. All codes
N6735M Cessna
210M
Fixed-wing, single engine Individual owner
New Jersey
Standard 2019-03-02 ValidFAA registration status code V: Valid registration. All codes
N4605M Beech
A36
Fixed-wing, single engine Johnson Plane Services LLC
Greenbrier, Tennessee
Standard 2019-03-01 ValidFAA registration status code V: Valid registration. All codes
N911NK Beech
V35A
Fixed-wing, single engine Co-owned owner
California
Standard 2019-02-28 ValidFAA registration status code V: Valid registration. All codes
N9361Q Beech
F33A
Fixed-wing, single engine 61Q LLC
Brookfield, Wisconsin
Standard 2019-02-26 ValidFAA registration status code V: Valid registration. All codes
N4090A Cessna
310R
Fixed-wing, multi-engine Top Gun Aviation Group INC
Santa Monica, California
Special flight permit 2019-02-25 ValidFAA registration status code V: Valid registration. All codes
N58EL Beech
58
Fixed-wing, multi-engine N1107U LLC
Lewisville, North Carolina
Standard 2019-02-25 ValidFAA registration status code V: Valid registration. All codes
N4566S Beech
V35B
Fixed-wing, single engine Individual owner
Florida
Standard 2019-02-23 ValidFAA registration status code V: Valid registration. All codes
N7044N Beech
D55
Fixed-wing, multi-engine Explore Lake Lure LLC
Miami, Florida
Standard 2019-02-23 ValidFAA registration status code V: Valid registration. All codes
N2051X Beech
A36
Fixed-wing, single engine Individual owner
Texas
Standard 2019-02-14 ValidFAA registration status code V: Valid registration. All codes
N533KA Cessna
207
Fixed-wing, single engine Kamaka Air LLC
Honolulu, Hawaii
Standard 2019-02-14 ValidFAA registration status code V: Valid registration. All codes
N1922U Cessna
A185E
Fixed-wing, single engine Individual owner
Connecticut
Standard 2019-02-12 ValidFAA registration status code V: Valid registration. All codes
N185AB Cessna
A185F
Fixed-wing, single engine Individual owner
Alaska
Standard 2019-02-11 ValidFAA registration status code V: Valid registration. All codes
N5724V Beech
V35
Fixed-wing, single engine N5724V LLC
Kalispell, Montana
Standard 2019-02-09 ValidFAA registration status code V: Valid registration. All codes
N193DC Cessna
310R
Fixed-wing, multi-engine 310 Charter LLC
Zanesville, Ohio
Standard 2019-02-08 ValidFAA registration status code V: Valid registration. All codes
N2435A Beech
V35A
Fixed-wing, single engine Individual owner
Texas
Standard 2019-02-07 ValidFAA registration status code V: Valid registration. All codes
N6243Z Cessna
U206G
Fixed-wing, single engine Seattle Seaplanes LLC
Seattle, Washington
Standard 2019-02-06 ValidFAA registration status code V: Valid registration. All codes
N19MN Beech
A36
Fixed-wing, single engine Co-owned owner
Illinois
Standard 2019-02-05 ValidFAA registration status code V: Valid registration. All codes
N2124L Beech
V35B
Fixed-wing, single engine Max D Watkins PC
Tulsa, Oklahoma
Standard 2019-02-05 ValidFAA registration status code V: Valid registration. All codes
N7650N Beech
36
Fixed-wing, single engine Individual owner
Michigan
Standard 2019-02-05 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.