The U.S. aircraft register, updated daily
Engines · piston (reciprocating) · data as of October 7, 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

These connections as data: /graph/engine/continental-io-520-series.json · about the eFlight graph.

Aircraft newest certificates first · 9,484

Tail no.Maker and modelGroupOwner and baseCertificateRegisteredStatus
N585PM Cessna
A185F
Fixed-wing, single engine N585Pm LLC
Worthington, Ohio
Standard 2022-02-04 ValidFAA registration status code V: Valid registration. All codes
N94059 Cessna
A185F
Fixed-wing, single engine Individual owner
Alaska
Standard 2022-02-04 ValidFAA registration status code V: Valid registration. All codes
N11TJ Cessna
310R
Fixed-wing, multi-engine Individual owner
North Carolina
Standard 2022-02-03 ValidFAA registration status code V: Valid registration. All codes
N31CC Aero Commander
200D
Fixed-wing, single engine Withheld at owner's request
Standard 2022-02-03 ValidFAA registration status code V: Valid registration. All codes
N17785 Beech
A36
Fixed-wing, single engine
Standard 2022-02-01 ValidFAA registration status code V: Valid registration. All codes
N185BM Cessna
A185F
Fixed-wing, single engine Wallitner Aviation INC
Renton, Washington
Standard 2022-01-31 ValidFAA registration status code V: Valid registration. All codes
N258BB Beech
58
Fixed-wing, multi-engine Individual owner
California
Standard 2022-01-31 ValidFAA registration status code V: Valid registration. All codes
N4478S Beech
A36
Fixed-wing, single engine Individual owner
Massachusetts
Standard 2022-01-31 ValidFAA registration status code V: Valid registration. All codes
N3828Y Cessna
210D
Fixed-wing, single engine Individual owner
Washington
Standard 2022-01-29 ValidFAA registration status code V: Valid registration. All codes
N3942Y Cessna
210D
Fixed-wing, single engine Individual owner
New York
Standard 2022-01-29 ValidFAA registration status code V: Valid registration. All codes
N409SS Beech
S35
Fixed-wing, single engine Blackwell Aviation INC
Bell Vernon, Pennsylvania
Standard 2022-01-29 ValidFAA registration status code V: Valid registration. All codes
N66DH Cessna
320E
Fixed-wing, multi-engine Co-owned owner
Minnesota
Standard 2022-01-29 ValidFAA registration status code V: Valid registration. All codes
N7952R Beech
D55
Fixed-wing, multi-engine Victory Lane Aviation LLC
Concord, North Carolina
Standard 2022-01-29 ValidFAA registration status code V: Valid registration. All codes
N9793E Bellanca
17-30A
Fixed-wing, single engine Co-owned owner
Arizona
Standard 2022-01-29 ValidFAA registration status code V: Valid registration. All codes
N1556M Cessna
A188A
Fixed-wing, single engine C-Fleet LLC
Missoula, Montana
Multiple 2022-01-28 ValidFAA registration status code V: Valid registration. All codes
N25719 Beech
V35B
Fixed-wing, single engine Co-owned owner
Oregon
Standard 2022-01-28 ValidFAA registration status code V: Valid registration. All codes
N3264Q Cessna
401
Fixed-wing, multi-engine Individual owner
Hawaii
Standard 2022-01-28 ValidFAA registration status code V: Valid registration. All codes
N327BL Beech
E-55
Fixed-wing, multi-engine Bnb LLC
Bensenville, Illinois
Standard 2022-01-28 ValidFAA registration status code V: Valid registration. All codes
N416MK Beech
95-C55
Fixed-wing, multi-engine Individual owner
Texas
Standard 2022-01-28 ValidFAA registration status code V: Valid registration. All codes
N9019S Beech
S35
Fixed-wing, single engine Sky Master LLC
Blue Earth, Minnesota
Standard 2022-01-28 ValidFAA registration status code V: Valid registration. All codes
N1978S Beech
F33A
Fixed-wing, single engine Co-owned owner
Colorado
Standard 2022-01-27 ValidFAA registration status code V: Valid registration. All codes
N1798R Cessna
A185F
Fixed-wing, single engine Individual owner
Alaska
Standard 2022-01-26 ValidFAA registration status code V: Valid registration. All codes
N334 Beech
V35
Fixed-wing, single engine Individual owner
Michigan
Standard 2022-01-26 ValidFAA registration status code V: Valid registration. All codes
N59210 Cessna
210L
Fixed-wing, single engine Safe Pilots Group LLC
Nyack, New York
Standard 2022-01-26 ValidFAA registration status code V: Valid registration. All codes
N123US Beech
58
Fixed-wing, multi-engine Individual owner
Arkansas
Standard 2022-01-24 ValidFAA registration status code V: Valid registration. All codes
N494P Beech
F33A
Fixed-wing, single engine Individual owner
Missouri
Standard 2022-01-24 ValidFAA registration status code V: Valid registration. All codes
N200Q Beech
F33A
Fixed-wing, single engine Individual owner
New York
Standard 2022-01-20 ValidFAA registration status code V: Valid registration. All codes
N4WR Beech
V35
Fixed-wing, single engine Individual owner
California
Standard 2022-01-20 ValidFAA registration status code V: Valid registration. All codes
N898WP Beech
F33A
Fixed-wing, single engine Triple B Aviation INC
Idabel, Oklahoma
Standard 2022-01-20 ValidFAA registration status code V: Valid registration. All codes
N98DC Beech
E-55
Fixed-wing, multi-engine Cayuga Copters INC
Cynthiana, Kentucky
Standard 2022-01-19 ValidFAA registration status code V: Valid registration. All codes
N1136A Beech
A36
Fixed-wing, single engine Withheld at owner's request
Standard 2022-01-15 ValidFAA registration status code V: Valid registration. All codes
N63TC Beech
A36
Fixed-wing, single engine
Standard 2022-01-15 ValidFAA registration status code V: Valid registration. All codes
N78KK Beech
V35B
Fixed-wing, single engine Jim Heck Investments LLC
Findlay, Ohio
Standard 2022-01-15 ValidFAA registration status code V: Valid registration. All codes
N1204F Cessna
A185F
Fixed-wing, single engine Moroney Aviation LLC
Chugiak, Alaska
Standard 2022-01-14 ValidFAA registration status code V: Valid registration. All codes
N64PK Beech
S35
Fixed-wing, single engine Tom Eaton Consulting LLC
West Sacramento, California
Standard 2022-01-14 ValidFAA registration status code V: Valid registration. All codes
N7471N Beech
36
Fixed-wing, single engine Individual owner
California
Standard 2022-01-13 ValidFAA registration status code V: Valid registration. All codes
N771T Beech
V35B
Fixed-wing, single engine Individual owner
Texas
Standard 2022-01-13 ValidFAA registration status code V: Valid registration. All codes
N777TL Beech
V35
Fixed-wing, single engine Individual owner
North Carolina
Standard 2022-01-13 ValidFAA registration status code V: Valid registration. All codes
N99914 Beech
V35B
Fixed-wing, single engine Roof Management LTD
Marysville, Ohio
Standard 2022-01-13 ValidFAA registration status code V: Valid registration. All codes
N310MN Cessna
310R
Fixed-wing, multi-engine Mid-Continental Aviation LLC
Wilmington, Delaware
Standard 2022-01-12 ValidFAA registration status code V: Valid registration. All codes
N2554X Cessna
P206
Fixed-wing, single engine Individual owner
Nevada
Standard 2022-01-11 ValidFAA registration status code V: Valid registration. All codes
N17794 Beech
A36
Fixed-wing, single engine Individual owner
Iowa
Standard 2022-01-10 ValidFAA registration status code V: Valid registration. All codes
N2018A Beech
A36
Fixed-wing, single engine Diamond B Farms Trucking INC
Gamaliel, Kentucky
Standard 2022-01-10 ValidFAA registration status code V: Valid registration. All codes
N23642 Beech
F33A
Fixed-wing, single engine Samson Motors INC
Redmond, Oregon
Standard 2022-01-08 ValidFAA registration status code V: Valid registration. All codes
N24183 Beech
V35B
Fixed-wing, single engine Individual owner
Georgia
Standard 2022-01-08 ValidFAA registration status code V: Valid registration. All codes
N9472N Cessna
A185F
Fixed-wing, single engine Individual owner
Washington
Standard 2022-01-08 ValidFAA registration status code V: Valid registration. All codes
N2031P Beech
A36
Fixed-wing, single engine Individual owner
Michigan
Standard 2022-01-06 ValidFAA registration status code V: Valid registration. All codes
N6652R Beech
A36
Fixed-wing, single engine Individual owner
Indiana
Standard 2022-01-06 ValidFAA registration status code V: Valid registration. All codes
N7954Q Cessna
310R
Fixed-wing, multi-engine Frankenstein Aviation LLC
Hollywood, Florida
Standard 2022-01-06 ValidFAA registration status code V: Valid registration. All codes
N2573Q Cessna
210J
Fixed-wing, single engine Jayviation INC
Lake City, Florida
Standard 2022-01-05 ValidFAA registration status code V: Valid registration. All codes
N624DK Beech
V35B
Fixed-wing, single engine Fw Cielo LLC
Canton, Ohio
Standard 2022-01-05 ValidFAA registration status code V: Valid registration. All codes
N872T Beech
S35
Fixed-wing, single engine Individual owner
Delaware
Standard 2022-01-05 ValidFAA registration status code V: Valid registration. All codes
N989BM Beech
A36
Fixed-wing, single engine Individual owner
Ohio
Standard 2022-01-05 ValidFAA registration status code V: Valid registration. All codes
N133VM Beech
F33A
Fixed-wing, single engine Co-owned owner
California
Standard 2022-01-04 ValidFAA registration status code V: Valid registration. All codes
N1197F Cessna
A185F
Fixed-wing, single engine Co-owned owner
Idaho
Standard 2022-01-03 ValidFAA registration status code V: Valid registration. All codes
N4023B Bellanca
17-30A
Fixed-wing, single engine Individual owner
Florida
Standard 2022-01-03 ValidFAA registration status code V: Valid registration. All codes
N458SS Beech
58
Fixed-wing, multi-engine Sos Ranch LLC
Humble, Texas
Standard 2022-01-03 ValidFAA registration status code V: Valid registration. All codes
N1822N Beech
V35B
Fixed-wing, single engine Co-owned owner
Tennessee
Standard 2021-12-29 ValidFAA registration status code V: Valid registration. All codes
N732ST Cessna
210M
Fixed-wing, single engine Individual owner
Montana
Standard 2021-12-29 ValidFAA registration status code V: Valid registration. All codes
N8740Q Cessna
U206F
Fixed-wing, single engine Individual owner
Montana
Standard 2021-12-28 ValidFAA registration status code V: Valid registration. All codes
N954R Beech
F33A
Fixed-wing, single engine Individual owner
Texas
Standard 2021-12-28 ValidFAA registration status code V: Valid registration. All codes
N36AB Beech
A36
Fixed-wing, single engine Ng Turf LLC
Whitesburg, Georgia
Standard 2021-12-27 ValidFAA registration status code V: Valid registration. All codes
N133GM Beech
F33A
Fixed-wing, single engine Bem Holdings LLC
Nashville, Tennessee
Standard 2021-12-23 ValidFAA registration status code V: Valid registration. All codes
N3375L Cessna
A185E
Fixed-wing, single engine Co-owned owner
Connecticut
Standard 2021-12-21 ValidFAA registration status code V: Valid registration. All codes
N29EA Beech
F33A
Fixed-wing, single engine Co-owned owner
Iowa
Standard 2021-12-20 ValidFAA registration status code V: Valid registration. All codes
N4194S Beech
A36
Fixed-wing, single engine Individual owner
California
Standard 2021-12-18 ValidFAA registration status code V: Valid registration. All codes
N79SD Cessna
310R
Fixed-wing, multi-engine Easi Aircraft LLC
Mount Pleasant, Arkansas
Standard 2021-12-17 ValidFAA registration status code V: Valid registration. All codes
N1832B Beech
A36
Fixed-wing, single engine R&S Acquisitions LLC
Weatherford, Texas
Standard 2021-12-16 ValidFAA registration status code V: Valid registration. All codes
N2991T Aero Commander
200D
Fixed-wing, single engine Individual owner
Oregon
Standard 2021-12-16 ValidFAA registration status code V: Valid registration. All codes
N828V Beech
A36
Fixed-wing, single engine Individual owner
Kansas
Standard 2021-12-16 ValidFAA registration status code V: Valid registration. All codes
N8682Q Beech
S35
Fixed-wing, single engine Individual owner
Texas
Standard 2021-12-16 ValidFAA registration status code V: Valid registration. All codes
N8779V Bellanca
17-30A
Fixed-wing, single engine Co-owned owner
New Mexico
Standard 2021-12-16 ValidFAA registration status code V: Valid registration. All codes
N6039Z Beech
A36
Fixed-wing, single engine Individual owner
Colorado
Standard 2021-12-15 ValidFAA registration status code V: Valid registration. All codes
N158BD Beech
58
Fixed-wing, multi-engine J L Aviation LLC
Jonesboro, Arkansas
Standard 2021-12-14 ValidFAA registration status code V: Valid registration. All codes
N300EW Cessna
210L
Fixed-wing, single engine 2F Trade LLC
Collinsville, Texas
Standard 2021-12-13 ValidFAA registration status code V: Valid registration. All codes
N10HL Cessna
210L
Fixed-wing, single engine Individual owner
Oregon
Standard 2021-12-11 ValidFAA registration status code V: Valid registration. All codes
N4780R Cessna
A188B
Fixed-wing, single engine R&R Flight Services INC
Mendota, Illinois
Restricted 2021-12-11 ValidFAA registration status code V: Valid registration. All codes
N123JT Cessna
T210F
Fixed-wing, single engine Individual owner
Texas
Standard 2021-12-10 ValidFAA registration status code V: Valid registration. All codes
N334CH Beech
V35B
Fixed-wing, single engine Little River Aviation LLC
Tifton, Georgia
Standard 2021-12-10 ValidFAA registration status code V: Valid registration. All codes
N521E Beech
F33A
Fixed-wing, single engine Angels Ten LLC
Norfolk, Virginia
Standard 2021-12-10 ValidFAA registration status code V: Valid registration. All codes
N956WB Cessna
210N
Fixed-wing, single engine Ed Payne Motors INC
Weslaco, Texas
Standard 2021-12-10 ValidFAA registration status code V: Valid registration. All codes
N3885Q Cessna
A185F
Fixed-wing, single engine Co-owned owner
Minnesota
Standard 2021-12-09 ValidFAA registration status code V: Valid registration. All codes
N46JJ Beech
V35B
Fixed-wing, single engine Individual owner
Iowa
Standard 2021-12-09 ValidFAA registration status code V: Valid registration. All codes
N4948U Cessna
210E
Fixed-wing, single engine Withheld at owner's request
Standard 2021-12-09 ValidFAA registration status code V: Valid registration. All codes
N5915F Cessna
210G
Fixed-wing, single engine Co-owned owner
West Virginia
Standard 2021-12-09 ValidFAA registration status code V: Valid registration. All codes
N74CB Beech
V35B
Fixed-wing, single engine Co-owned owner
California
Standard 2021-12-09 ValidFAA registration status code V: Valid registration. All codes
N8844M Beech
S35
Fixed-wing, single engine Individual owner
Tennessee
Standard 2021-12-09 ValidFAA registration status code V: Valid registration. All codes
N115CA Beech
V35B
Fixed-wing, single engine 8K Entertainment INC
Wells, Maine
Standard 2021-12-07 ValidFAA registration status code V: Valid registration. All codes
N2231T Cessna
A185E
Fixed-wing, single engine Co-owned owner
Maine
Standard 2021-12-07 ValidFAA registration status code V: Valid registration. All codes
N67290 Beech
58
Fixed-wing, multi-engine Co-owned owner
North Carolina
Standard 2021-12-07 ValidFAA registration status code V: Valid registration. All codes
N36SR Beech
A36
Fixed-wing, single engine Co-owned owner
Florida
Standard 2021-12-06 ValidFAA registration status code V: Valid registration. All codes
N4291Q Cessna
U206F
Fixed-wing, single engine Withheld at owner's request
Multiple 2021-12-04 ValidFAA registration status code V: Valid registration. All codes
N335TB Beech
F33A
Fixed-wing, single engine Jkh Enterprises LLC
Westfield, Indiana
Standard 2021-12-03 ValidFAA registration status code V: Valid registration. All codes
N8198G Cessna
U206G
Fixed-wing, single engine Sky Wagon LLC
Phoenix, Arizona
Standard 2021-12-03 ValidFAA registration status code V: Valid registration. All codes
N1694M Cessna
A185E
Fixed-wing, single engine Individual owner
Alaska
Standard 2021-12-02 ValidFAA registration status code V: Valid registration. All codes
N30RM Beech
E-55
Fixed-wing, multi-engine Individual owner
Florida
Standard 2021-12-02 ValidFAA registration status code V: Valid registration. All codes
N5859J Cessna
A185E
Fixed-wing, single engine Co-owned owner
Alaska
Restricted 2021-12-02 ValidFAA registration status code V: Valid registration. All codes
N1877L Beech
A36
Fixed-wing, single engine Individual owner
Kansas
Standard 2021-11-30 ValidFAA registration status code V: Valid registration. All codes
N955LS Cessna
A185F
Fixed-wing, single engine Somd Seaplanes LLC
Lexington Park, Maryland
Standard 2021-11-30 ValidFAA registration status code V: Valid registration. All codes
N185WW Cessna
A185F
Fixed-wing, single engine Individual owner
Idaho
Standard 2021-11-29 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 7, 2026. Horsepower and thrust are the FAA's figures for the series, not for a particular aircraft.