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
N65VB Beech
S35
Fixed-wing, single engine Co-owned owner
California
Standard 2018-05-04 ValidFAA registration status code V: Valid registration. All codes
N8373N Beech
D55
Fixed-wing, multi-engine Individual owner
California
Standard 2018-05-04 ValidFAA registration status code V: Valid registration. All codes
N1671R Cessna
A185F
Fixed-wing, single engine Co-owned owner
Alaska
Standard 2018-05-03 ValidFAA registration status code V: Valid registration. All codes
N252V Beech
F33A
Fixed-wing, single engine Co-owned owner
California
Standard 2018-05-03 ValidFAA registration status code V: Valid registration. All codes
N3813G Cessna
310R
Fixed-wing, multi-engine One Three Golf LLC
Cleghorn, Iowa
Standard 2018-05-03 ValidFAA registration status code V: Valid registration. All codes
N550CB Beech
E-55
Fixed-wing, multi-engine Individual owner
Florida
Standard 2018-05-01 ValidFAA registration status code V: Valid registration. All codes
N6733B Beech
F33A
Fixed-wing, single engine Co-owned owner
California
Standard 2018-05-01 ValidFAA registration status code V: Valid registration. All codes
N8064M Beech
F33A
Fixed-wing, single engine Team Financial INC
Birmingham, Alabama
Standard 2018-04-30 ValidFAA registration status code V: Valid registration. All codes
N48JG Cessna
A185F
Fixed-wing, single engine Individual owner
Alaska
Multiple 2018-04-26 ValidFAA registration status code V: Valid registration. All codes
N18368 Beech
V35B
Fixed-wing, single engine Olaf LLC
Bellbrook, Ohio
Standard 2018-04-24 ValidFAA registration status code V: Valid registration. All codes
N8028J Beech
F33A
Fixed-wing, single engine Vintage Aircraft Sales LLC
Radnor, Ohio
Standard 2018-04-23 ValidFAA registration status code V: Valid registration. All codes
N762CA Cessna
421C
Fixed-wing, multi-engine Cullum Transportation LLC
North Charleston, South Carolina
Standard 2018-04-20 ValidFAA registration status code V: Valid registration. All codes
N9401G Cessna
U206E
Fixed-wing, single engine Individual owner
Oklahoma
Standard 2018-04-20 ValidFAA registration status code V: Valid registration. All codes
N4486A Beech
E-55
Fixed-wing, multi-engine Aerro LLC
Argyle, Texas
Standard 2018-04-18 ValidFAA registration status code V: Valid registration. All codes
N7293R Beech
58
Fixed-wing, multi-engine Air New England LLC
Portsmouth, New Hampshire
Standard 2018-04-17 ValidFAA registration status code V: Valid registration. All codes
N5182H Cessna
A185F
Fixed-wing, single engine Co-owned owner
Alaska
Standard 2018-04-13 ValidFAA registration status code V: Valid registration. All codes
N841RQ Cessna
U206F
Fixed-wing, single engine Individual owner
Wisconsin
Standard 2018-04-13 ValidFAA registration status code V: Valid registration. All codes
N185W Cessna
A185F
Fixed-wing, single engine Co-owned owner
Oregon
Multiple 2018-04-12 ValidFAA registration status code V: Valid registration. All codes
N1905U Cessna
U206F
Fixed-wing, single engine Co-owned owner
Arizona
Standard 2018-04-12 ValidFAA registration status code V: Valid registration. All codes
N7AW Beech
S35
Fixed-wing, single engine Individual owner
Oregon
Standard 2018-04-12 ValidFAA registration status code V: Valid registration. All codes
N9217Q Beech
F33A
Fixed-wing, single engine Co-owned owner
California
Standard 2018-04-11 ValidFAA registration status code V: Valid registration. All codes
N1795E Cessna
310R
Fixed-wing, multi-engine Rb Aviation LLC
Tyler, Texas
Standard 2018-04-10 ValidFAA registration status code V: Valid registration. All codes
N555DB Beech
F33A
Fixed-wing, single engine Individual owner
California
Standard 2018-04-10 ValidFAA registration status code V: Valid registration. All codes
N9692Y Cessna
210N
Fixed-wing, single engine A Viation INC
Bennettsville, South Carolina
Standard 2018-04-10 ValidFAA registration status code V: Valid registration. All codes
N111NJ Cessna
U206
Fixed-wing, single engine New Jersey Forest Fire Service
Trenton, New Jersey
Standard 2018-04-09 ValidFAA registration status code V: Valid registration. All codes
N964HB Beech
S35
Fixed-wing, single engine Hubbard Aviators LLC
Harrison, Arkansas
Standard 2018-04-05 ValidFAA registration status code V: Valid registration. All codes
N2241S Cessna
210L
Fixed-wing, single engine Individual owner
California
Standard 2018-04-04 ValidFAA registration status code V: Valid registration. All codes
N33MU Beech
F33A
Fixed-wing, single engine Kteg LLC
Bridgeport, Texas
Standard 2018-04-04 ValidFAA registration status code V: Valid registration. All codes
N7349R Beech
F33A
Fixed-wing, single engine Individual owner
Nevada
Standard 2018-04-04 ValidFAA registration status code V: Valid registration. All codes
N9841Y Cessna
210N
Fixed-wing, single engine Individual owner
Kansas
Standard 2018-04-04 ValidFAA registration status code V: Valid registration. All codes
N190P Cessna
P206
Fixed-wing, single engine 98 Mike LLC
Hayden, Idaho
Standard 2018-04-03 ValidFAA registration status code V: Valid registration. All codes
N27HB Beech
A36
Fixed-wing, single engine Co-owned owner
Washington
Standard 2018-04-03 ValidFAA registration status code V: Valid registration. All codes
N658DG Beech
58
Fixed-wing, multi-engine Individual owner
Nebraska
Standard 2018-04-03 ValidFAA registration status code V: Valid registration. All codes
N6939R Cessna
T210H
Fixed-wing, single engine Individual owner
Nebraska
Standard 2018-04-03 ValidFAA registration status code V: Valid registration. All codes
N93L Cessna
A185E
Fixed-wing, single engine Sutton Aircraft Salvage LLC
Palmer, Alaska
Standard 2018-04-03 ValidFAA registration status code V: Valid registration. All codes
N70112 Cessna
A185E
Fixed-wing, single engine Piper Meridian LLC
Mesa, Arizona
Standard 2018-04-02 ValidFAA registration status code V: Valid registration. All codes
N94DM Cessna
A185F
Fixed-wing, single engine Lad Salvage LLC
Morgan City, Louisiana
Standard 2018-04-02 ValidFAA registration status code V: Valid registration. All codes
N4639Q Cessna
210L
Fixed-wing, single engine Individual owner
Virginia
Standard 2018-03-30 ValidFAA registration status code V: Valid registration. All codes
N3844G Beech
A36
Fixed-wing, single engine Landvalue Management LLC
Fresno, California
Standard 2018-03-28 ValidFAA registration status code V: Valid registration. All codes
N581KB Beech
A36
Fixed-wing, single engine Fenn Farms INC
Durham, California
Standard 2018-03-28 ValidFAA registration status code V: Valid registration. All codes
N7016N Beech
V35A
Fixed-wing, single engine N7016N LLC
Columbia, Missouri
Standard 2018-03-28 ValidFAA registration status code V: Valid registration. All codes
N732ZU Cessna
210M
Fixed-wing, single engine Map Enterprises INC
Mayfield, Kentucky
Standard 2018-03-28 ValidFAA registration status code V: Valid registration. All codes
N750DR Cessna
310R
Fixed-wing, multi-engine Individual owner
Florida
Standard 2018-03-28 ValidFAA registration status code V: Valid registration. All codes
N2312F Cessna
210E
Fixed-wing, single engine Co-owned owner
Oklahoma
Standard 2018-03-27 ValidFAA registration status code V: Valid registration. All codes
N3976G Cessna
U206C
Fixed-wing, single engine Individual owner
New Hampshire
Standard 2018-03-27 ValidFAA registration status code V: Valid registration. All codes
N59292 Cessna
210L
Fixed-wing, single engine Cloud Busters LLC
Goodrich, Michigan
Standard 2018-03-27 ValidFAA registration status code V: Valid registration. All codes
N7865R Beech
V35A
Fixed-wing, single engine Spangler Bryan G
Manteno, Illinois
Standard 2018-03-26 ValidFAA registration status code V: Valid registration. All codes
N1815R Cessna
A185F
Fixed-wing, single engine Osprey Island Lodge INC
Eagle River, Alaska
Standard 2018-03-23 ValidFAA registration status code V: Valid registration. All codes
N3793Q Beech
V35
Fixed-wing, single engine Co-owned owner
Texas
Standard 2018-03-23 ValidFAA registration status code V: Valid registration. All codes
N4492S Beech
A36
Fixed-wing, single engine D K Boyer LLC
Melbourne, Florida
Standard 2018-03-23 ValidFAA registration status code V: Valid registration. All codes
N4527M Beech
F33A
Fixed-wing, single engine F33 Air LLC
Selinsgrove, Pennsylvania
Standard 2018-03-22 ValidFAA registration status code V: Valid registration. All codes
N60527 Beech
V35B
Fixed-wing, single engine Co-owned owner
California
Standard 2018-03-22 ValidFAA registration status code V: Valid registration. All codes
N7AE Cessna
320D
Fixed-wing, multi-engine Individual owner
Oklahoma
Standard 2018-03-22 ValidFAA registration status code V: Valid registration. All codes
N4561V Cessna
U206F
Fixed-wing, single engine Orca Wealth Management LLC
New Port Richey, Florida
Standard 2018-03-20 ValidFAA registration status code V: Valid registration. All codes
N9016V Beech
A36
Fixed-wing, single engine Individual owner
Kentucky
Standard 2018-03-20 ValidFAA registration status code V: Valid registration. All codes
N9909Z Cessna
U206G
Fixed-wing, single engine Lake and Peninsula Airlines INC
Port Alsworth, Alaska
Standard 2018-03-20 ValidFAA registration status code V: Valid registration. All codes
N5529D Beech
F33A
Fixed-wing, single engine Individual owner
Connecticut
Standard 2018-03-19 ValidFAA registration status code V: Valid registration. All codes
N2720T Beech
V35
Fixed-wing, single engine Individual owner
Washington
Standard 2018-03-15 ValidFAA registration status code V: Valid registration. All codes
N72BR Beech
A36
Fixed-wing, single engine Prestige Air Travel
Middletown, Delaware
Standard 2018-03-15 ValidFAA registration status code V: Valid registration. All codes
N8133V Beech
F33A
Fixed-wing, single engine N8133V LLC
Greenville, North Carolina
Standard 2018-03-15 ValidFAA registration status code V: Valid registration. All codes
N535Q Beech
D55
Fixed-wing, multi-engine Geaux Fly LLC
Bossier City, Louisiana
Standard 2018-03-14 ValidFAA registration status code V: Valid registration. All codes
N33WH Beech
A36
Fixed-wing, single engine Co-owned owner
Texas
Standard 2018-03-13 ValidFAA registration status code V: Valid registration. All codes
N819B Beech
V35B
Fixed-wing, single engine Individual owner
Kansas
Standard 2018-03-13 ValidFAA registration status code V: Valid registration. All codes
N3770Q Beech
V35
Fixed-wing, single engine Individual owner
Oklahoma
Standard 2018-03-12 ValidFAA registration status code V: Valid registration. All codes
N4WZ Beech
58
Fixed-wing, multi-engine Individual owner
Texas
Standard 2018-03-12 ValidFAA registration status code V: Valid registration. All codes
N2606X Cessna
P206
Fixed-wing, single engine Smith and Cherry Aviation LLC
Knoxville, Tennessee
Standard 2018-03-08 ValidFAA registration status code V: Valid registration. All codes
N2563Z Cessna
185B
Fixed-wing, single engine Individual owner
Alaska
Multiple 2018-03-07 ValidFAA registration status code V: Valid registration. All codes
N221WS Beech
F33A
Fixed-wing, single engine Chaz LLC
Wilmington, Delaware
Standard 2018-03-06 ValidFAA registration status code V: Valid registration. All codes
N789JH Beech
36
Fixed-wing, single engine Co-owned owner
Colorado
Standard 2018-03-06 ValidFAA registration status code V: Valid registration. All codes
N7998M Beech
V35
Fixed-wing, single engine Individual owner
South Carolina
Standard 2018-03-06 ValidFAA registration status code V: Valid registration. All codes
N95PJ Beech
58
Fixed-wing, multi-engine Individual owner
Louisiana
Standard 2018-03-06 ValidFAA registration status code V: Valid registration. All codes
N311CT Beech
A36
Fixed-wing, single engine Individual owner
California
Standard 2018-03-05 ValidFAA registration status code V: Valid registration. All codes
N45FM Beech
58
Fixed-wing, multi-engine Co-owned owner
Michigan
Standard 2018-03-05 ValidFAA registration status code V: Valid registration. All codes
N6204V Beech
V35
Fixed-wing, single engine Avcraft INC
Columbus, Nebraska
Standard 2018-03-05 ValidFAA registration status code V: Valid registration. All codes
N1871F Cessna
210F
Fixed-wing, single engine Individual owner
Tennessee
Standard 2018-02-28 ValidFAA registration status code V: Valid registration. All codes
N2032E Beech
V35B
Fixed-wing, single engine Ohio Air Partners LLC
Chardon, Ohio
Standard 2018-02-28 ValidFAA registration status code V: Valid registration. All codes
N2354B Beech
V35A
Fixed-wing, single engine High Sky LLC
Rogers, Arkansas
Standard 2018-02-28 ValidFAA registration status code V: Valid registration. All codes
N1500B Beech
F33A
Fixed-wing, single engine Electrical Field Services INC
Huffman, Texas
Standard 2018-02-27 ValidFAA registration status code V: Valid registration. All codes
N201JH Beech
V35
Fixed-wing, single engine Co-owned owner
California
Standard 2018-02-27 ValidFAA registration status code V: Valid registration. All codes
N369M Bellanca
17-30A
Fixed-wing, single engine Individual owner
Arizona
Standard 2018-02-27 ValidFAA registration status code V: Valid registration. All codes
N454J Beech
A36
Fixed-wing, single engine Individual owner
Texas
Standard 2018-02-27 ValidFAA registration status code V: Valid registration. All codes
N804MM Cessna
185F
Fixed-wing, single engine Van Treese Kole S
Anchorage, Alaska
Standard 2018-02-26 ValidFAA registration status code V: Valid registration. All codes
N17668 Beech
A36
Fixed-wing, single engine Individual owner
Louisiana
Standard 2018-02-20 ValidFAA registration status code V: Valid registration. All codes
N70810 Cessna
U206F
Fixed-wing, single engine Wrangell Mountain Air INC
Palmer, Alaska
Standard 2018-02-20 ValidFAA registration status code V: Valid registration. All codes
N71DW Cessna
310R
Fixed-wing, multi-engine Individual owner
Michigan
Standard 2018-02-16 ValidFAA registration status code V: Valid registration. All codes
N38WG Beech
E-55
Fixed-wing, multi-engine Individual owner
Florida
Standard 2018-02-15 ValidFAA registration status code V: Valid registration. All codes
N78KJ Cessna
310R
Fixed-wing, multi-engine Individual owner
Texas
Standard 2018-02-15 ValidFAA registration status code V: Valid registration. All codes
N6420N Cessna
A185F
Fixed-wing, single engine South Aero LLC
Albuquerque, New Mexico
Standard 2018-02-14 ValidFAA registration status code V: Valid registration. All codes
N2962T Aero Commander
200D
Fixed-wing, single engine Aviation Days LLC
Ridgefield, Connecticut
Standard 2018-02-13 ValidFAA registration status code V: Valid registration. All codes
N43BB Beech
F33A
Fixed-wing, single engine Individual owner
Washington
Standard 2018-02-13 ValidFAA registration status code V: Valid registration. All codes
N8946U Beech
S35
Fixed-wing, single engine Individual owner
Washington
Experimental 2018-02-13 ValidFAA registration status code V: Valid registration. All codes
N7975R Beech
V35A
Fixed-wing, single engine Co-owned owner
Oklahoma
Standard 2018-02-12 ValidFAA registration status code V: Valid registration. All codes
N6607B Cessna
A188B
Fixed-wing, single engine Individual owner
Maryland
Restricted 2018-02-09 ValidFAA registration status code V: Valid registration. All codes
N6632V Bellanca
17-30A
Fixed-wing, single engine Individual owner
Arizona
Standard 2018-02-08 ValidFAA registration status code V: Valid registration. All codes
N81BB Beech
F33A
Fixed-wing, single engine Individual owner
Michigan
Standard 2018-02-08 ValidFAA registration status code V: Valid registration. All codes
N21861 Cessna
A188B
Fixed-wing, single engine Round Engine Aero
Nashville, Michigan
Restricted 2018-02-05 ValidFAA registration status code V: Valid registration. All codes
N46PK Cessna
U206G
Fixed-wing, single engine Tensas Taildraggers LLC
Saint Joseph, Louisiana
Standard 2018-02-05 ValidFAA registration status code V: Valid registration. All codes
N734HX Cessna
U206G
Fixed-wing, single engine Waters Aero- Marine INC DBA
South Thomaston, Maine
Standard 2018-02-05 ValidFAA registration status code V: Valid registration. All codes
N14798 Bellanca
17-30A
Fixed-wing, single engine Individual owner
Ohio
Standard 2018-01-30 ValidFAA registration status code V: Valid registration. All codes
N2295W Cessna
T207A
Fixed-wing, single engine Individual owner
Alaska
Standard 2018-01-30 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.