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
N81SC Cessna
210K
Fixed-wing, single engine Gl Aircraft Enterprise LLC
Wilmington, Delaware
Standard 2014-11-07 ValidFAA registration status code V: Valid registration. All codes
N900CF Beech
F33A
Fixed-wing, single engine Axio Aviation LLC
Elmira, New York
Standard 2014-11-07 ValidFAA registration status code V: Valid registration. All codes
N8548Q Cessna
A185F
Fixed-wing, single engine Klein Flying Service INC
Lawrenceville, Illinois
Standard 2014-11-05 ValidFAA registration status code V: Valid registration. All codes
N2063G Beech
58
Fixed-wing, multi-engine Individual owner
Tennessee
Standard 2014-11-04 ValidFAA registration status code V: Valid registration. All codes
N4451W Beech
F33A
Fixed-wing, single engine Flying On Edge LLC
Redmond, Washington
Standard 2014-11-04 ValidFAA registration status code V: Valid registration. All codes
N909GB Cessna
A185F
Fixed-wing, single engine Head West Lake Operations LLC
Dubois, Wyoming
Standard 2014-11-04 ValidFAA registration status code V: Valid registration. All codes
N77ES Cessna
210D
Fixed-wing, single engine Withheld at owner's request
Standard 2014-10-30 ValidFAA registration status code V: Valid registration. All codes
N1520G Beech
F33A
Fixed-wing, single engine Individual owner
Connecticut
Standard 2014-10-28 ValidFAA registration status code V: Valid registration. All codes
N185BS Cessna
A185F
Fixed-wing, single engine Individual owner
Colorado
Standard 2014-10-28 ValidFAA registration status code V: Valid registration. All codes
N215Y Beech
V35
Fixed-wing, single engine Individual owner
Wisconsin
Standard 2014-10-28 ValidFAA registration status code V: Valid registration. All codes
N29018 Cessna
U206C
Fixed-wing, single engine Pacific Rim Energy INC
Henderson, Nevada
Standard 2014-10-28 ValidFAA registration status code V: Valid registration. All codes
N3108L Beech
F33A
Fixed-wing, single engine Individual owner
Iowa
Standard 2014-10-28 ValidFAA registration status code V: Valid registration. All codes
N4853J Beech
V35
Fixed-wing, single engine Naca 130 LLC
Cameron Park, California
Standard 2014-10-28 ValidFAA registration status code V: Valid registration. All codes
N48RK Beech
F33A
Fixed-wing, single engine Individual owner
North Dakota
Standard 2014-10-27 ValidFAA registration status code V: Valid registration. All codes
N88CJ Beech
A36
Fixed-wing, single engine Individual owner
Oregon
Standard 2014-10-27 ValidFAA registration status code V: Valid registration. All codes
N3789Q Beech
V35
Fixed-wing, single engine Individual owner
Tennessee
Standard 2014-10-24 ValidFAA registration status code V: Valid registration. All codes
N6318S Beech
V35B
Fixed-wing, single engine Individual owner
Minnesota
Standard 2014-10-23 ValidFAA registration status code V: Valid registration. All codes
N855DS Beech
V35
Fixed-wing, single engine Aerolutions LLC
Preston, Idaho
Standard 2014-10-22 ValidFAA registration status code V: Valid registration. All codes
N33JL Beech
V35A
Fixed-wing, single engine J L Flyers LLC
Orinda, California
Standard 2014-10-17 ValidFAA registration status code V: Valid registration. All codes
N25BT Beech
V35B
Fixed-wing, single engine Individual owner
Florida
Standard 2014-10-15 ValidFAA registration status code V: Valid registration. All codes
N6307B Cessna
A185F
Fixed-wing, single engine Individual owner
Alaska
Standard 2014-10-15 ValidFAA registration status code V: Valid registration. All codes
N716SL Bellanca
17-30A
Fixed-wing, single engine Individual owner
Texas
Standard 2014-10-15 ValidFAA registration status code V: Valid registration. All codes
N3211L Beech
V35B
Fixed-wing, single engine Individual owner
Montana
Standard 2014-10-09 ValidFAA registration status code V: Valid registration. All codes
N7945K Beech
S35
Fixed-wing, single engine Co-owned owner
California
Standard 2014-10-09 ValidFAA registration status code V: Valid registration. All codes
N406MH Beech
35-C33A
Fixed-wing, single engine Juliet Yankee Aviation LLC
Greenwich, Connecticut
Standard 2014-10-07 ValidFAA registration status code V: Valid registration. All codes
N917SD Beech
V35B
Fixed-wing, single engine Tj Air Holdings INC Trustee
Wilmington, Delaware
Standard 2014-10-07 ValidFAA registration status code V: Valid registration. All codes
N2106L Beech
A36
Fixed-wing, single engine Cht CORP
Lake Forest, California
Standard 2014-10-06 ValidFAA registration status code V: Valid registration. All codes
N2092W Beech
V35
Fixed-wing, single engine Earthcirc08 LLC
Chagrin Falls, Ohio
Standard 2014-10-03 ValidFAA registration status code V: Valid registration. All codes
N875DB Beech
58
Fixed-wing, multi-engine Dbco LLC
Greenwood Village, Colorado
Standard 2014-10-03 ValidFAA registration status code V: Valid registration. All codes
N259M Aero Commander
200D
Fixed-wing, single engine Ridgerunner 51 LLC
Springdale, Arkansas
Standard 2014-10-02 ValidFAA registration status code V: Valid registration. All codes
N77206 Cessna
U206G
Fixed-wing, single engine Venture Alaska LLC
Homer, Alaska
None on file 2014-10-02 ValidFAA registration status code V: Valid registration. All codes
N7973M Beech
95-C55
Fixed-wing, multi-engine 7973M LLC
Broomfield, Colorado
Standard 2014-10-01 ValidFAA registration status code V: Valid registration. All codes
N206MG Cessna
U206G
Fixed-wing, single engine Independence Aviation INC
La Porte City, Iowa
Standard 2014-09-29 ValidFAA registration status code V: Valid registration. All codes
N8715Z Cessna
P206C
Fixed-wing, single engine Individual owner
Ohio
Standard 2014-09-29 ValidFAA registration status code V: Valid registration. All codes
N60NE Beech
A36
Fixed-wing, single engine Cub Crafters Resale LLC
Yakima, Washington
Standard 2014-09-25 ValidFAA registration status code V: Valid registration. All codes
N7866R Beech
V35A
Fixed-wing, single engine N7866R Leasing LLC
Linden, Michigan
Standard 2014-09-24 ValidFAA registration status code V: Valid registration. All codes
N6233X Beech
A36
Fixed-wing, single engine Rdm Ventures LLC
Buckhead, Georgia
Standard 2014-09-22 ValidFAA registration status code V: Valid registration. All codes
N8643Z Cessna
P206C
Fixed-wing, single engine Vitatoe Industries INC
Chillicothe, Ohio
Standard 2014-09-22 ValidFAA registration status code V: Valid registration. All codes
N6181U Beech
A36
Fixed-wing, single engine Andrew Investment Company LLC
Atoka, Oklahoma
Standard 2014-09-18 ValidFAA registration status code V: Valid registration. All codes
N93033 Cessna
A185F
Fixed-wing, single engine Kaval John P JR
Duxbury, Massachusetts
Standard 2014-09-18 ValidFAA registration status code V: Valid registration. All codes
N274LE Aero Commander
500-A
Fixed-wing, multi-engine Individual owner
California
Standard 2014-09-17 ValidFAA registration status code V: Valid registration. All codes
N714LS Cessna
A185F
Fixed-wing, single engine Hard Luck Aviation LLC
Tok, Alaska
Restricted 2014-09-16 ValidFAA registration status code V: Valid registration. All codes
N2191F Cessna
U206
Fixed-wing, single engine Individual owner
Texas
Standard 2014-09-15 ValidFAA registration status code V: Valid registration. All codes
N8813V Bellanca
17-30A
Fixed-wing, single engine Individual owner
Maryland
Standard 2014-09-15 ValidFAA registration status code V: Valid registration. All codes
N1362F Cessna
A185F
Fixed-wing, single engine Co-owned owner
Alaska
Standard 2014-09-12 ValidFAA registration status code V: Valid registration. All codes
N5833F Cessna
210G
Fixed-wing, single engine Vermillion Fc-1 LLC
Crystal City, Texas
Standard 2014-09-12 ValidFAA registration status code V: Valid registration. All codes
N310MC Cessna
310R
Fixed-wing, multi-engine Ecolift CORP
San Juan, Puerto Rico
Standard 2014-09-10 ValidFAA registration status code V: Valid registration. All codes
N3495L Cessna
U206B
Fixed-wing, single engine Saqul'Aq Air LLC
Coupeville, Washington
Restricted 2014-09-10 ValidFAA registration status code V: Valid registration. All codes
N2502T Navion
NAVION H
Fixed-wing, single engine Individual owner
California
Standard 2014-09-09 ValidFAA registration status code V: Valid registration. All codes
N666MS Beech
V35A
Fixed-wing, single engine Sandy Bayou Planting CO
Osceola, Arkansas
Standard 2014-09-08 ValidFAA registration status code V: Valid registration. All codes
N70488 Cessna
A185F
Fixed-wing, single engine Individual owner
Alaska
Standard 2014-09-08 ValidFAA registration status code V: Valid registration. All codes
N1889W Beech
58
Fixed-wing, multi-engine Sabre 65 LLC
Helena, Montana
Standard 2014-09-05 ValidFAA registration status code V: Valid registration. All codes
N1859C Beech
F33A
Fixed-wing, single engine Hadley Aviation LLC
Kent, Connecticut
Standard 2014-09-04 ValidFAA registration status code V: Valid registration. All codes
N9141S Beech
F33A
Fixed-wing, single engine Individual owner
California
Standard 2014-09-03 ValidFAA registration status code V: Valid registration. All codes
N119MS Cessna
210J
Fixed-wing, single engine Aeronorth LLC
Ann Arbor, Michigan
Standard 2014-08-29 ValidFAA registration status code V: Valid registration. All codes
N7369R Beech
V35B
Fixed-wing, single engine Individual owner
Michigan
Standard 2014-08-27 ValidFAA registration status code V: Valid registration. All codes
N9900G Cessna
A188A
Fixed-wing, single engine Skyline Agrinautics INC
Osage, Iowa
Multiple 2014-08-27 ValidFAA registration status code V: Valid registration. All codes
N5BZ Beech
58
Fixed-wing, multi-engine Bad Bird LLC
Elon, North Carolina
Standard 2014-08-25 ValidFAA registration status code V: Valid registration. All codes
N5490J Cessna
310R
Fixed-wing, multi-engine Individual owner
Connecticut
Standard 2014-08-22 ValidFAA registration status code V: Valid registration. All codes
N7983K Beech
S35
Fixed-wing, single engine Individual owner
Texas
Standard 2014-08-22 ValidFAA registration status code V: Valid registration. All codes
N55ZZ Beech
95-C55
Fixed-wing, multi-engine Individual owner
Arizona
Standard 2014-08-21 ValidFAA registration status code V: Valid registration. All codes
N60LP Beech
A36
Fixed-wing, single engine Lowpass Aviation Services LLC
Germantown, Tennessee
Standard 2014-08-20 ValidFAA registration status code V: Valid registration. All codes
N578U Beech
V35B
Fixed-wing, single engine Individual owner
Texas
Standard 2014-08-19 ValidFAA registration status code V: Valid registration. All codes
N310WH Cessna
310R
Fixed-wing, multi-engine Lexington Air Services LLC
Greenwood, Mississippi
Standard 2014-08-18 ValidFAA registration status code V: Valid registration. All codes
N5448R Cessna
172F
Fixed-wing, single engine Co-owned owner
West Virginia
Standard 2014-08-18 ValidFAA registration status code V: Valid registration. All codes
N275ZZ Cessna
A185F
Fixed-wing, single engine Individual owner
Standard 2014-08-13 Reports overdueFAA registration status code N: Non-citizen corporation that has not returned its flight-hour reports. All codes
N404V Beech
P35
Fixed-wing, single engine Individual owner
California
Standard 2014-08-12 ValidFAA registration status code V: Valid registration. All codes
N88CL Beech
F33A
Fixed-wing, single engine Individual owner
Texas
Standard 2014-08-12 ValidFAA registration status code V: Valid registration. All codes
N502TJ Beech
F33A
Fixed-wing, single engine Individual owner
Texas
Standard 2014-08-11 ValidFAA registration status code V: Valid registration. All codes
N64793 Beech
A36
Fixed-wing, single engine N64793 LLC
Naples, Florida
Standard 2014-08-11 ValidFAA registration status code V: Valid registration. All codes
N8425Q Cessna
A185F
Fixed-wing, single engine Perrycook Flight Services LLC
Gig Harbor, Washington
Standard 2014-08-11 ValidFAA registration status code V: Valid registration. All codes
N1673T Beech
A36
Fixed-wing, single engine Individual owner
Texas
Standard 2014-08-08 ValidFAA registration status code V: Valid registration. All codes
N1823R Cessna
A185F
Fixed-wing, single engine Individual owner
Pennsylvania
Standard 2014-08-08 ValidFAA registration status code V: Valid registration. All codes
N4057B Bellanca
17-30A
Fixed-wing, single engine Co-owned owner
New York
Standard 2014-08-08 ValidFAA registration status code V: Valid registration. All codes
N5433X Cessna
U206G
Fixed-wing, single engine Mk Air LLC
Lewistown, Montana
Standard 2014-08-08 ValidFAA registration status code V: Valid registration. All codes
N169DK Cessna
310R
Fixed-wing, multi-engine Individual owner
Illinois
Standard 2014-08-07 ValidFAA registration status code V: Valid registration. All codes
N5924S Beech
35-C33A
Fixed-wing, single engine N5924S LLC
Fayetteville, Georgia
Standard 2014-08-07 ValidFAA registration status code V: Valid registration. All codes
N76185 Cessna
A185F
Fixed-wing, single engine Individual owner
Texas
Standard 2014-08-07 ValidFAA registration status code V: Valid registration. All codes
N2045C Beech
A36
Fixed-wing, single engine Co-owned owner
California
Standard 2014-08-05 ValidFAA registration status code V: Valid registration. All codes
N9041C Beech
V35B
Fixed-wing, single engine Individual owner
Texas
Standard 2014-08-05 ValidFAA registration status code V: Valid registration. All codes
N2582K Cessna
180K
Fixed-wing, single engine Individual owner
Maine
Standard 2014-08-04 ValidFAA registration status code V: Valid registration. All codes
N28035 Bellanca
17-30A
Fixed-wing, single engine Individual owner
Texas
Standard 2014-08-04 ValidFAA registration status code V: Valid registration. All codes
N521BW Cessna
210L
Fixed-wing, single engine Bilmar Avionics INC
Kissimmee, Florida
Standard 2014-08-04 ValidFAA registration status code V: Valid registration. All codes
N702DZ Cessna
P206
Fixed-wing, single engine Skydive Fargo INC
West Fargo, North Dakota
Standard 2014-08-04 ValidFAA registration status code V: Valid registration. All codes
N9523Q Beech
35-C33A
Fixed-wing, single engine Individual owner
Colorado
Standard 2014-08-04 ValidFAA registration status code V: Valid registration. All codes
N8069G Beech
F33A
Fixed-wing, single engine R B Hanson Equipment LLC
Clancy, Montana
Standard 2014-07-31 ValidFAA registration status code V: Valid registration. All codes
N8419N Beech
V35A
Fixed-wing, single engine Individual owner
Kansas
Standard 2014-07-31 ValidFAA registration status code V: Valid registration. All codes
N367D Beech
A36
Fixed-wing, single engine Individual owner
Georgia
Standard 2014-07-30 ValidFAA registration status code V: Valid registration. All codes
N204LP Beech
F33A
Fixed-wing, single engine Individual owner
California
Standard 2014-07-25 ValidFAA registration status code V: Valid registration. All codes
N113PS Paul Seales
PT3
Fixed-wing, single engine Individual owner
Texas
Experimental 2014-07-24 ValidFAA registration status code V: Valid registration. All codes
N712VT Cessna
U206C
Fixed-wing, single engine Middle Fork Aviation INC
Challis, Idaho
Standard 2014-07-23 ValidFAA registration status code V: Valid registration. All codes
N3084N Beech
F33A
Fixed-wing, single engine Individual owner
New Mexico
Standard 2014-07-22 ValidFAA registration status code V: Valid registration. All codes
N4384T Piper
PA-46-310P
Fixed-wing, single engine Taw Development INC
Raleigh, North Carolina
Standard 2014-07-22 ValidFAA registration status code V: Valid registration. All codes
N3437Q Cessna
320E
Fixed-wing, multi-engine Individual owner
Texas
Standard 2014-07-21 ValidFAA registration status code V: Valid registration. All codes
N2764J Cessna
A185E
Fixed-wing, single engine Individual owner
Alaska
Standard 2014-07-18 ValidFAA registration status code V: Valid registration. All codes
N7371V Bellanca
17-30
Fixed-wing, single engine Individual owner
Texas
Standard 2014-07-17 ValidFAA registration status code V: Valid registration. All codes
N1743R Cessna
A185F
Fixed-wing, single engine Chronicle Aerospace INC
Wilmington, Delaware
Standard 2014-07-16 ValidFAA registration status code V: Valid registration. All codes
N1169Q Cessna
A185F
Fixed-wing, single engine Individual owner
Alaska
Standard 2014-07-15 ValidFAA registration status code V: Valid registration. All codes
N6831M Cessna
210M
Fixed-wing, single engine South Beach Adventure Sports LLC
Bald Head Island, North Carolina
Standard 2014-07-15 ValidFAA registration status code V: Valid registration. All codes
N30797 Beech
F33A
Fixed-wing, single engine Co-owned owner
Kentucky
Standard 2014-07-14 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.