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
N310HC Cessna
310R
Fixed-wing, multi-engine Individual owner
Pennsylvania
Standard 2021-04-10 ValidFAA registration status code V: Valid registration. All codes
N40GM Beech
S35
Fixed-wing, single engine Individual owner
Oregon
Standard 2021-04-10 ValidFAA registration status code V: Valid registration. All codes
N435MC Beech
95-C55
Fixed-wing, multi-engine Smoketown Flight Center LLC
Smoketown, Pennsylvania
Standard 2021-04-10 ValidFAA registration status code V: Valid registration. All codes
N4757F Cessna
P206B
Fixed-wing, single engine Co-owned owner
Arizona
Standard 2021-04-10 ValidFAA registration status code V: Valid registration. All codes
N74AZ Beech
A36
Fixed-wing, single engine Hmaair LLC
Gilbert, Arizona
Standard 2021-04-10 ValidFAA registration status code V: Valid registration. All codes
N1968D Beech
D55
Fixed-wing, multi-engine Bellamy INC
Three Forks, Montana
Standard 2021-04-08 ValidFAA registration status code V: Valid registration. All codes
N7154D Cessna
210L
Fixed-wing, single engine Co-owned owner
North Dakota
Standard 2021-04-08 ValidFAA registration status code V: Valid registration. All codes
N7231R Beech
A36
Fixed-wing, single engine
Standard 2021-04-08 ValidFAA registration status code V: Valid registration. All codes
N2038X Beech
F33A
Fixed-wing, single engine Individual owner
West Virginia
Standard 2021-04-07 ValidFAA registration status code V: Valid registration. All codes
N210PZ Cessna
210L
Fixed-wing, single engine Kmz Centurion LLC
San Mateo, California
Standard 2021-04-07 ValidFAA registration status code V: Valid registration. All codes
N707RD Beech
V35B
Fixed-wing, single engine Individual owner
California
Standard 2021-04-07 ValidFAA registration status code V: Valid registration. All codes
N7995M Beech
35-C33A
Fixed-wing, single engine Individual owner
Georgia
Standard 2021-04-07 ValidFAA registration status code V: Valid registration. All codes
N48458 Beech
V35B
Fixed-wing, single engine Individual owner
Colorado
Standard 2021-04-06 ValidFAA registration status code V: Valid registration. All codes
N5621Z Beech
F33A
Fixed-wing, single engine Jon Air LLC
Dover, Delaware
Standard 2021-04-06 ValidFAA registration status code V: Valid registration. All codes
N67L Beech
E-55
Fixed-wing, multi-engine Road Kill Aviation INC
Wilmington, Delaware
Standard 2021-04-06 ValidFAA registration status code V: Valid registration. All codes
N327CP Bellanca
17-30A
Fixed-wing, single engine Su Farms Transportation LLC
Hale Center, Texas
Standard 2021-04-05 ValidFAA registration status code V: Valid registration. All codes
N8133R Beech
F33A
Fixed-wing, single engine Aero Tex LLC
Jacksonville, Florida
Standard 2021-04-05 ValidFAA registration status code V: Valid registration. All codes
N6683D Beech
V35B
Fixed-wing, single engine Regional Consultants LLC
Wilmington, Delaware
Standard 2021-04-02 ValidFAA registration status code V: Valid registration. All codes
N17577 Beech
E-55
Fixed-wing, multi-engine Individual owner
Arkansas
Standard 2021-04-01 ValidFAA registration status code V: Valid registration. All codes
N183Q Beech
S35
Fixed-wing, single engine Individual owner
Wisconsin
Standard 2021-04-01 ValidFAA registration status code V: Valid registration. All codes
N3138W Beech
V35B
Fixed-wing, single engine Individual owner
Kentucky
Standard 2021-04-01 ValidFAA registration status code V: Valid registration. All codes
N333JW Cessna
210L
Fixed-wing, single engine Individual owner
Georgia
Standard 2021-04-01 ValidFAA registration status code V: Valid registration. All codes
N4952E Cessna
A185F
Fixed-wing, single engine Co-owned owner
Alaska
Standard 2021-04-01 ValidFAA registration status code V: Valid registration. All codes
N8725Z Cessna
P206D
Fixed-wing, single engine Co-owned owner
Arizona
Standard 2021-04-01 ValidFAA registration status code V: Valid registration. All codes
N235E Beech
P35
Fixed-wing, single engine Individual owner
Pennsylvania
Standard 2021-03-31 ValidFAA registration status code V: Valid registration. All codes
N2550T Navion
NAVION H
Fixed-wing, single engine Tropical Airways LLC
West Palm Beach, Florida
Standard 2021-03-31 ValidFAA registration status code V: Valid registration. All codes
N555BC Beech
V35
Fixed-wing, single engine Individual owner
Mississippi
Standard 2021-03-31 ValidFAA registration status code V: Valid registration. All codes
N36WF Beech
A36
Fixed-wing, single engine Longboat Key Aviation LLC
Wooster, Ohio
Standard 2021-03-30 ValidFAA registration status code V: Valid registration. All codes
N7225R Beech
58
Fixed-wing, multi-engine Individual owner
Montana
Standard 2021-03-30 ValidFAA registration status code V: Valid registration. All codes
N825EG Beech
F33A
Fixed-wing, single engine Flying Eagle LLC
Wilmington, Delaware
Standard 2021-03-30 ValidFAA registration status code V: Valid registration. All codes
N15RR Aero Commander
200D
Fixed-wing, single engine Individual owner
Alabama
Standard 2021-03-26 ValidFAA registration status code V: Valid registration. All codes
N1565T Cessna
310R
Fixed-wing, multi-engine Forbes Consolidated INC
New Smyrna Beach, Florida
Standard 2021-03-23 ValidFAA registration status code V: Valid registration. All codes
N310CT Cessna
310R
Fixed-wing, multi-engine Icp Aviation LLC
Melbourne, Arkansas
Standard 2021-03-23 ValidFAA registration status code V: Valid registration. All codes
N354M Beech
S35
Fixed-wing, single engine Mission Aviation LLC
Billings, Montana
Standard 2021-03-23 ValidFAA registration status code V: Valid registration. All codes
N4080S Beech
V35B
Fixed-wing, single engine Co-owned owner
Kansas
Standard 2021-03-23 ValidFAA registration status code V: Valid registration. All codes
N10AK Beech
D55
Fixed-wing, multi-engine Cygnus Holdings LLC
Ballwin, Missouri
Standard 2021-03-22 ValidFAA registration status code V: Valid registration. All codes
N2183L Beech
A36
Fixed-wing, single engine Individual owner
California
Standard 2021-03-22 ValidFAA registration status code V: Valid registration. All codes
N84BB Beech
V35A
Fixed-wing, single engine Kauffman Concrete LLC
Wilmington, Delaware
Standard 2021-03-20 ValidFAA registration status code V: Valid registration. All codes
N146FC Cessna
P206A
Fixed-wing, single engine Usda Forest Service Fepp
Malvern, Arkansas
Standard 2021-03-19 ValidFAA registration status code V: Valid registration. All codes
N3819Y Cessna
210D
Fixed-wing, single engine Individual owner
Tennessee
Standard 2021-03-18 ValidFAA registration status code V: Valid registration. All codes
N4061S Beech
A36
Fixed-wing, single engine Individual owner
California
Standard 2021-03-18 ValidFAA registration status code V: Valid registration. All codes
N1061Y Navion
NAVION H
Fixed-wing, single engine Individual owner
Washington
Standard 2021-03-17 ValidFAA registration status code V: Valid registration. All codes
N2229X Cessna
A185E
Fixed-wing, single engine Co-owned owner
Alaska
Standard 2021-03-17 ValidFAA registration status code V: Valid registration. All codes
N28021 Bellanca
17-30A
Fixed-wing, single engine Individual owner
New Jersey
Standard 2021-03-17 ValidFAA registration status code V: Valid registration. All codes
N300MS Beech
D55
Fixed-wing, multi-engine Co-owned owner
California
Standard 2021-03-17 ValidFAA registration status code V: Valid registration. All codes
N6072S Beech
V35B
Fixed-wing, single engine Co-owned owner
Nevada
Standard 2021-03-17 ValidFAA registration status code V: Valid registration. All codes
N73KP Bellanca
17-31A
Fixed-wing, single engine Co-owned owner
Florida
Standard 2021-03-17 ValidFAA registration status code V: Valid registration. All codes
N777KW Beech
V35A
Fixed-wing, single engine Co-owned owner
Montana
Standard 2021-03-17 ValidFAA registration status code V: Valid registration. All codes
N788CF Beech
58
Fixed-wing, multi-engine 3W Group INC
Hot Springs, Arkansas
Standard 2021-03-17 ValidFAA registration status code V: Valid registration. All codes
N1576H Cessna
A185F
Fixed-wing, single engine Individual owner
Alaska
Standard 2021-03-16 ValidFAA registration status code V: Valid registration. All codes
N392S Beech
V35A
Fixed-wing, single engine Co-owned owner
Washington
Standard 2021-03-16 ValidFAA registration status code V: Valid registration. All codes
N5872F Cessna
210G
Fixed-wing, single engine Individual owner
Arizona
Standard 2021-03-16 ValidFAA registration status code V: Valid registration. All codes
N756NG Cessna
U206G
Fixed-wing, single engine Perrigue Thomas e
Bishop, Texas
Standard 2021-03-16 ValidFAA registration status code V: Valid registration. All codes
N1515M Beech
F33A
Fixed-wing, single engine Surecraft LLC
Dover, Delaware
Standard 2021-03-15 ValidFAA registration status code V: Valid registration. All codes
N20224 Beech
V35B
Fixed-wing, single engine Obie Aviation LLC
Rogers, Arkansas
Standard 2021-03-15 ValidFAA registration status code V: Valid registration. All codes
N242R Beech
F33A
Fixed-wing, single engine Individual owner
Texas
Standard 2021-03-15 ValidFAA registration status code V: Valid registration. All codes
N3128W Beech
V35B
Fixed-wing, single engine Individual owner
North Carolina
Standard 2021-03-15 ValidFAA registration status code V: Valid registration. All codes
N99LG Beech
F33A
Fixed-wing, single engine Washington Enterprises LLC
Little Rock, Arkansas
Standard 2021-03-15 ValidFAA registration status code V: Valid registration. All codes
N3412Q Cessna
320E
Fixed-wing, multi-engine Individual owner
Utah
Standard 2021-03-13 ValidFAA registration status code V: Valid registration. All codes
N5806S Beech
S35
Fixed-wing, single engine AG Solutions of West Texas LLC
Roby, Texas
Standard 2021-03-13 ValidFAA registration status code V: Valid registration. All codes
N80GA Beech
E-55
Fixed-wing, multi-engine Individual owner
North Dakota
Standard 2021-03-13 ValidFAA registration status code V: Valid registration. All codes
N33TD Beech
F33A
Fixed-wing, single engine Lightning 35 Aviation LLC
Wilmington, Delaware
Standard 2021-03-12 ValidFAA registration status code V: Valid registration. All codes
N5046R Cessna
A185F
Fixed-wing, single engine Sandpoint Aviation LLC
Sandpoint, Idaho
Standard 2021-03-11 ValidFAA registration status code V: Valid registration. All codes
N6495N Cessna
210N
Fixed-wing, single engine Business Trip CORP INC
Cape Coral, Florida
Standard 2021-03-11 ValidFAA registration status code V: Valid registration. All codes
N6761R Cessna
T210F
Fixed-wing, single engine Individual owner
Idaho
Standard 2021-03-11 ValidFAA registration status code V: Valid registration. All codes
N58441 Cessna
U206F
Fixed-wing, single engine Tall Timber Flying Service LLC
Kalispell, Montana
Standard 2021-03-10 ValidFAA registration status code V: Valid registration. All codes
N208LH Cessna
U206F
Fixed-wing, single engine Ott Grosvenor LLC
Dillingham, Alaska
Multiple 2021-03-09 ValidFAA registration status code V: Valid registration. All codes
N88MB Beech
E-55
Fixed-wing, multi-engine Lebanon Aviation INC
Mount Juliet, Tennessee
Standard 2021-03-09 ValidFAA registration status code V: Valid registration. All codes
N9585Q Beech
V35A
Fixed-wing, single engine Tarheel Aircraft INC
Richlands, North Carolina
Standard 2021-03-09 ValidFAA registration status code V: Valid registration. All codes
N621SP Cessna
310R
Fixed-wing, multi-engine Individual owner
Florida
Standard 2021-03-08 ValidFAA registration status code V: Valid registration. All codes
N723MB Beech
E-55
Fixed-wing, multi-engine Terra Air LLC
Flippin, Arkansas
Standard 2021-03-08 ValidFAA registration status code V: Valid registration. All codes
N506YZ Cessna
210J
Fixed-wing, single engine R&R Gray Equipment & Cattle LLC
Enid, Oklahoma
Standard 2021-03-06 ValidFAA registration status code V: Valid registration. All codes
N1849P Beech
F33A
Fixed-wing, single engine Daedalus LLC
Bozeman, Montana
Standard 2021-03-05 ValidFAA registration status code V: Valid registration. All codes
N6759G Beech
A36
Fixed-wing, single engine Trademark Services LLC
Vineyard Haven, Massachusetts
Standard 2021-03-05 ValidFAA registration status code V: Valid registration. All codes
N13EJ Beech
F33A
Fixed-wing, single engine Avidash LLC
Cape Coral, Florida
Standard 2021-03-04 ValidFAA registration status code V: Valid registration. All codes
N449T Beech
V35B
Fixed-wing, single engine Co-owned owner
Tennessee
Standard 2021-03-04 ValidFAA registration status code V: Valid registration. All codes
N60EC Cessna
A185F
Fixed-wing, single engine Individual owner
Texas
Standard 2021-03-04 ValidFAA registration status code V: Valid registration. All codes
N6833L Cessna
310R
Fixed-wing, multi-engine Individual owner
Kentucky
Standard 2021-03-04 ValidFAA registration status code V: Valid registration. All codes
N70084 Cessna
A185E
Fixed-wing, single engine Individual owner
Maine
Standard 2021-03-04 ValidFAA registration status code V: Valid registration. All codes
N7853R Beech
E33C
Fixed-wing, single engine Individual owner
Arizona
Standard 2021-03-04 ValidFAA registration status code V: Valid registration. All codes
N2788T Beech
35-C33A
Fixed-wing, single engine Co-owned owner
Florida
Standard 2021-03-01 ValidFAA registration status code V: Valid registration. All codes
N961WW Beech
F33A
Fixed-wing, single engine Meacham Electric INC
Marathon, Florida
Standard 2021-02-27 ValidFAA registration status code V: Valid registration. All codes
N41HC Beech
A36
Fixed-wing, single engine Dkh Air LLC
Shady Shores, Texas
Standard 2021-02-26 ValidFAA registration status code V: Valid registration. All codes
N5757J Cessna
210K
Fixed-wing, single engine Individual owner
Oklahoma
Restricted 2021-02-26 ValidFAA registration status code V: Valid registration. All codes
N1619W Beech
E-55
Fixed-wing, multi-engine Executive Aircraft Management LLC
Northport, Alabama
Standard 2021-02-25 ValidFAA registration status code V: Valid registration. All codes
N455RB Beech
E-55
Fixed-wing, multi-engine Gh Enterprises INC
Baton Rouge, Louisiana
Standard 2021-02-25 ValidFAA registration status code V: Valid registration. All codes
N533C Beech
F33C
Fixed-wing, single engine 71Sq INC
Wilmington, Delaware
Standard 2021-02-25 ValidFAA registration status code V: Valid registration. All codes
N206BL Cessna
U206G
Fixed-wing, single engine Individual owner
Alaska
Standard 2021-02-24 ValidFAA registration status code V: Valid registration. All codes
N230Q Beech
95-C55
Fixed-wing, multi-engine Individual owner
Texas
Standard 2021-02-23 ValidFAA registration status code V: Valid registration. All codes
N7175N Beech
E33A
Fixed-wing, single engine Individual owner
Tennessee
Standard 2021-02-23 ValidFAA registration status code V: Valid registration. All codes
N162N Beech
95-C55
Fixed-wing, multi-engine Individual owner
Missouri
Standard 2021-02-22 ValidFAA registration status code V: Valid registration. All codes
N81VB Beech
V35B
Fixed-wing, single engine Neal Foster Trucking INC
Merrill, Oregon
Standard 2021-02-22 ValidFAA registration status code V: Valid registration. All codes
N19LL Beech
A36
Fixed-wing, single engine Dsr-Cherokee 180 LLC
Dallas, Texas
Standard 2021-02-20 ValidFAA registration status code V: Valid registration. All codes
N1550W Beech
A36
Fixed-wing, single engine Co-owned owner
Colorado
Standard 2021-02-19 ValidFAA registration status code V: Valid registration. All codes
N225TA Beech
58
Fixed-wing, multi-engine N225Ta LLC
Loganville, Georgia
Standard 2021-02-19 ValidFAA registration status code V: Valid registration. All codes
N3835Y Cessna
210D
Fixed-wing, single engine Individual owner
Montana
Standard 2021-02-19 ValidFAA registration status code V: Valid registration. All codes
N63361 Beech
E-55
Fixed-wing, multi-engine Apollo Aviation Group LLC
Saint Petersburg, Florida
Standard 2021-02-19 ValidFAA registration status code V: Valid registration. All codes
N7072N Beech
V35A
Fixed-wing, single engine Individual owner
New Jersey
Standard 2021-02-19 ValidFAA registration status code V: Valid registration. All codes
N1706W Beech
A36
Fixed-wing, single engine Hinton Bay Management LLC
Jackson, Wyoming
Standard 2021-02-18 ValidFAA registration status code V: Valid registration. All codes
N3629A Beech
V35B
Fixed-wing, single engine Co-owned owner
Washington
Standard 2021-02-18 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.