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
N6130V Beech
S35
Fixed-wing, single engine Individual owner
Connecticut
Standard 2021-02-18 ValidFAA registration status code V: Valid registration. All codes
N777SG Beech
58
Fixed-wing, multi-engine Claw LLC
Lake Saint Louis, Missouri
Standard 2021-02-18 ValidFAA registration status code V: Valid registration. All codes
N900JB Cessna
A185F
Fixed-wing, single engine Pumpkin Eater LLC
Tavares, Florida
Standard 2021-02-18 ValidFAA registration status code V: Valid registration. All codes
N2838W Beech
F33A
Fixed-wing, single engine Freebird LLC
Leawood, Kansas
Standard 2021-02-17 ValidFAA registration status code V: Valid registration. All codes
N4868J Beech
95-C55
Fixed-wing, multi-engine Individual owner
Georgia
Standard 2021-02-17 ValidFAA registration status code V: Valid registration. All codes
N4215S Beech
F33A
Fixed-wing, single engine Co-owned owner
Texas
Standard 2021-02-13 ValidFAA registration status code V: Valid registration. All codes
N6027F Beech
S35
Fixed-wing, single engine Individual owner
California
Standard 2021-02-13 ValidFAA registration status code V: Valid registration. All codes
N731TB Cessna
A188B
Fixed-wing, single engine Eastern Flying Service INC
Middletown, Delaware
Restricted 2021-02-13 ValidFAA registration status code V: Valid registration. All codes
N9554E Bellanca
17-30A
Fixed-wing, single engine Individual owner
Montana
Standard 2021-02-12 ValidFAA registration status code V: Valid registration. All codes
N17WF Beech
V35B
Fixed-wing, single engine Individual owner
California
Standard 2021-02-11 ValidFAA registration status code V: Valid registration. All codes
N84TM Cessna
A185F
Fixed-wing, single engine Realm Group Transport INC
Las Vegas, Nevada
Standard 2021-02-11 ValidFAA registration status code V: Valid registration. All codes
N93563 Bellanca
17-30A
Fixed-wing, single engine Co-owned owner
Montana
Standard 2021-02-11 ValidFAA registration status code V: Valid registration. All codes
N17CB Beech
V35
Fixed-wing, single engine Cygnet Aerospace CORP
Los Osos, California
Standard 2021-02-10 ValidFAA registration status code V: Valid registration. All codes
N112S Beech
S35
Fixed-wing, single engine Individual owner
California
Standard 2021-02-09 ValidFAA registration status code V: Valid registration. All codes
N186RD Cessna
210F
Fixed-wing, single engine Wayson Air LLC
Mount Auburn, Iowa
Standard 2021-02-09 ValidFAA registration status code V: Valid registration. All codes
N572BP Beech
F33A
Fixed-wing, single engine Individual owner
North Carolina
Standard 2021-02-08 ValidFAA registration status code V: Valid registration. All codes
N6658S Beech
58
Fixed-wing, multi-engine Kgb58 Aviation LLC
Gibsonia, Pennsylvania
Standard 2021-02-06 ValidFAA registration status code V: Valid registration. All codes
N823PC Beech
F33A
Fixed-wing, single engine Individual owner
Ohio
Standard 2021-02-06 ValidFAA registration status code V: Valid registration. All codes
N25667 Beech
A36
Fixed-wing, single engine Individual owner
California
Standard 2021-02-04 ValidFAA registration status code V: Valid registration. All codes
N300PM Cessna
310R
Fixed-wing, multi-engine 300Pm LLC
Bloomington, Indiana
Standard 2021-02-04 ValidFAA registration status code V: Valid registration. All codes
N480H Beech
V35
Fixed-wing, single engine Individual owner
Iowa
Standard 2021-02-04 ValidFAA registration status code V: Valid registration. All codes
N1690R Cessna
A185F
Fixed-wing, single engine Federal Aerial Applicators LLC
Wilmington, Delaware
Multiple 2021-02-03 ValidFAA registration status code V: Valid registration. All codes
N3102C Beech
F33A
Fixed-wing, single engine D & D Motors LLC
Georgetown, Texas
Standard 2021-02-02 ValidFAA registration status code V: Valid registration. All codes
N4624Q Cessna
210L
Fixed-wing, single engine Co-owned owner
California
Standard 2021-02-02 ValidFAA registration status code V: Valid registration. All codes
N74TW Cessna
A185F
Fixed-wing, single engine Individual owner
Nevada
Standard 2021-02-02 ValidFAA registration status code V: Valid registration. All codes
N1525W Beech
A36
Fixed-wing, single engine Co-owned owner
Kentucky
Standard 2021-02-01 ValidFAA registration status code V: Valid registration. All codes
N1861M Beech
A36
Fixed-wing, single engine Lightspeed Enterprises LLC
Virginia Beach, Virginia
Standard 2021-02-01 ValidFAA registration status code V: Valid registration. All codes
N5969F Cessna
210H
Fixed-wing, single engine Individual owner
Florida
Standard 2021-02-01 ValidFAA registration status code V: Valid registration. All codes
N7733A Beech
F33A
Fixed-wing, single engine Dvb Enterprises INC
Colcord, Oklahoma
Standard 2021-02-01 ValidFAA registration status code V: Valid registration. All codes
N39880 Bellanca
17-30A
Fixed-wing, single engine Balloon Promotions INC
Greenwood, Mississippi
Standard 2021-01-29 ValidFAA registration status code V: Valid registration. All codes
N35MV Beech
V35A
Fixed-wing, single engine Individual owner
Michigan
Standard 2021-01-28 ValidFAA registration status code V: Valid registration. All codes
N36VH Beech
A36
Fixed-wing, single engine Individual owner
Tennessee
Standard 2021-01-28 ValidFAA registration status code V: Valid registration. All codes
N492TC Bellanca
17-30A
Fixed-wing, single engine Individual owner
Michigan
Standard 2021-01-28 ValidFAA registration status code V: Valid registration. All codes
N853T Beech
V35B
Fixed-wing, single engine Co-owned owner
California
Standard 2021-01-28 ValidFAA registration status code V: Valid registration. All codes
N7PK Beech
V35B
Fixed-wing, single engine Individual owner
Georgia
Standard 2021-01-27 ValidFAA registration status code V: Valid registration. All codes
N1707W Beech
A36
Fixed-wing, single engine Co-owned owner
California
Standard 2021-01-26 ValidFAA registration status code V: Valid registration. All codes
N1856L Beech
V35B
Fixed-wing, single engine R J Fuselier & Associates LLC
Eunice, Louisiana
Standard 2021-01-26 ValidFAA registration status code V: Valid registration. All codes
N7018N Beech
V35A
Fixed-wing, single engine Co-owned owner
North Carolina
Standard 2021-01-26 ValidFAA registration status code V: Valid registration. All codes
N284JW Beech
V35B
Fixed-wing, single engine Individual owner
New York
Standard 2021-01-25 ValidFAA registration status code V: Valid registration. All codes
N4321S Beech
S35
Fixed-wing, single engine Beech Peak Aviation LLC
Boulder, Colorado
Standard 2021-01-23 ValidFAA registration status code V: Valid registration. All codes
N6016F Beech
S35
Fixed-wing, single engine Hanson Enterprises INC
Hamel, Minnesota
Standard 2021-01-23 ValidFAA registration status code V: Valid registration. All codes
N6310C Beech
A36
Fixed-wing, single engine Individual owner
Arizona
Standard 2021-01-23 ValidFAA registration status code V: Valid registration. All codes
N9855X Cessna
185
Fixed-wing, single engine Individual owner
Alaska
Multiple 2021-01-23 ValidFAA registration status code V: Valid registration. All codes
N5843F Cessna
210G
Fixed-wing, single engine U3 Aviation LLC
Little Rock, Arkansas
Standard 2021-01-22 ValidFAA registration status code V: Valid registration. All codes
N2070K Cessna
206
Fixed-wing, single engine Individual owner
Texas
Standard 2021-01-21 ValidFAA registration status code V: Valid registration. All codes
N5699K Beech
S35
Fixed-wing, single engine Moore Joseph M
Santa Barbara, California
Standard 2021-01-21 ValidFAA registration status code V: Valid registration. All codes
N11114 Beech
V35A
Fixed-wing, single engine Individual owner
Texas
Standard 2021-01-20 ValidFAA registration status code V: Valid registration. All codes
N4065S Beech
E-55
Fixed-wing, multi-engine Alpha 3 LLC
Newcastle, Oklahoma
Standard 2021-01-20 ValidFAA registration status code V: Valid registration. All codes
N4871J Beech
V35
Fixed-wing, single engine Co-owned owner
Texas
Standard 2021-01-20 ValidFAA registration status code V: Valid registration. All codes
N678J Beech
58
Fixed-wing, multi-engine International Air Services INC Trustee
Carson City, Nevada
Standard 2021-01-19 ValidFAA registration status code V: Valid registration. All codes
N30MT Cessna
U206G
Fixed-wing, single engine Co-owned owner
Idaho
Standard 2021-01-16 ValidFAA registration status code V: Valid registration. All codes
N967DG Cessna
182
Fixed-wing, single engine Individual owner
Alaska
Standard 2021-01-16 ValidFAA registration status code V: Valid registration. All codes
N1523F Cessna
185D
Fixed-wing, single engine Gray Rex Lee
Palmer, Alaska
Multiple 2021-01-14 ValidFAA registration status code V: Valid registration. All codes
N205AG Beech
58
Fixed-wing, multi-engine Wing Men LLC
Cleveland, Ohio
Standard 2021-01-14 ValidFAA registration status code V: Valid registration. All codes
N35RC Beech
S35
Fixed-wing, single engine G5 Aviation INC
Englewood, Colorado
Standard 2021-01-14 ValidFAA registration status code V: Valid registration. All codes
N4412Q Cessna
A188A
Fixed-wing, single engine Woods Flying Service LLC
Memphis, Missouri
Multiple 2021-01-14 ValidFAA registration status code V: Valid registration. All codes
N696SC Cessna
310R
Fixed-wing, multi-engine Weber Henry II
Victoria, Texas
Standard 2021-01-14 ValidFAA registration status code V: Valid registration. All codes
N77SV Bellanca
17-30A
Fixed-wing, single engine Individual owner
Texas
Standard 2021-01-14 ValidFAA registration status code V: Valid registration. All codes
N4443R Cessna
A185F
Fixed-wing, single engine Cold Region Air LLC
Fairbanks, Alaska
Standard 2021-01-13 ValidFAA registration status code V: Valid registration. All codes
N185JR Cessna
A185F
Fixed-wing, single engine Co-owned owner
Maine
Standard 2021-01-12 ValidFAA registration status code V: Valid registration. All codes
N364WP Beech
A36
Fixed-wing, single engine Porter Flying Service
Durham, California
Standard 2021-01-12 ValidFAA registration status code V: Valid registration. All codes
N4962F Cessna
U206B
Fixed-wing, single engine Individual owner
California
Standard 2021-01-12 ValidFAA registration status code V: Valid registration. All codes
N60766 Cessna
U206F
Fixed-wing, single engine Individual owner
Alaska
Standard 2021-01-12 ValidFAA registration status code V: Valid registration. All codes
N6778M Cessna
210M
Fixed-wing, single engine Individual owner
Tennessee
Standard 2021-01-12 ValidFAA registration status code V: Valid registration. All codes
N19SA Beech
A36
Fixed-wing, single engine Sierra Aviation LLC
Hendersonville, Tennessee
Standard 2021-01-09 ValidFAA registration status code V: Valid registration. All codes
N28091 Bellanca
17-30A
Fixed-wing, single engine Individual owner
Texas
Standard 2021-01-08 ValidFAA registration status code V: Valid registration. All codes
N30TB Beech
58
Fixed-wing, multi-engine Albert Lea Airport INC
Albert Lea, Minnesota
Standard 2021-01-07 ValidFAA registration status code V: Valid registration. All codes
N4976U Cessna
210E
Fixed-wing, single engine Individual owner
Florida
Standard 2021-01-07 ValidFAA registration status code V: Valid registration. All codes
N2144L Beech
A36
Fixed-wing, single engine Private Paws LLC
Colorado Springs, Colorado
Standard 2021-01-06 ValidFAA registration status code V: Valid registration. All codes
N2722A Beech
V35A
Fixed-wing, single engine Individual owner
Texas
Standard 2021-01-06 ValidFAA registration status code V: Valid registration. All codes
N354LC Beech
V35
Fixed-wing, single engine Delos Anesthesia Services PC
Barstow, California
Standard 2021-01-06 ValidFAA registration status code V: Valid registration. All codes
N211EB Beech
D55
Fixed-wing, multi-engine Individual owner
Nevada
Standard 2021-01-05 ValidFAA registration status code V: Valid registration. All codes
N274S Beech
V35
Fixed-wing, single engine Individual owner
Florida
Standard 2021-01-05 ValidFAA registration status code V: Valid registration. All codes
N4547M Beech
58
Fixed-wing, multi-engine Oxly Aviation LLC
Wilmington, Delaware
Standard 2021-01-04 ValidFAA registration status code V: Valid registration. All codes
N702DL Beech
95-C55
Fixed-wing, multi-engine Bohlke LLC
Kingshill, U.S. Virgin Islands
Standard 2021-01-04 ValidFAA registration status code V: Valid registration. All codes
N7487Q Cessna
U206F
Fixed-wing, single engine 206 LLC
Anchorage, Alaska
Standard 2021-01-04 ValidFAA registration status code V: Valid registration. All codes
N8328N Beech
V35A
Fixed-wing, single engine 789 Aviation LLC
Medina, Ohio
Standard 2021-01-04 ValidFAA registration status code V: Valid registration. All codes
N310DS Cessna
310R
Fixed-wing, multi-engine World Marketing Syndicate I
Wilmington, Delaware
Standard 2020-12-28 ValidFAA registration status code V: Valid registration. All codes
N3726L Beech
F33A
Fixed-wing, single engine 8S1-51 LLC
Polson, Montana
Standard 2020-12-28 ValidFAA registration status code V: Valid registration. All codes
N5071J Cessna
310R
Fixed-wing, multi-engine Sol Aerial Surveys LLC
Las Vegas, Nevada
Standard 2020-12-28 ValidFAA registration status code V: Valid registration. All codes
N9412S Beech
V35
Fixed-wing, single engine Individual owner
California
Standard 2020-12-23 ValidFAA registration status code V: Valid registration. All codes
N104HE Cessna
A185F
Fixed-wing, single engine Dixie Sand and Gravel LLC
Edisto Island, South Carolina
Standard 2020-12-21 ValidFAA registration status code V: Valid registration. All codes
N2037Z Beech
A36
Fixed-wing, single engine Individual owner
Texas
Standard 2020-12-19 ValidFAA registration status code V: Valid registration. All codes
N7347R Beech
58
Fixed-wing, multi-engine N145Ta LLC
Carson City, Nevada
Standard 2020-12-18 ValidFAA registration status code V: Valid registration. All codes
N169RR Beech
58
Fixed-wing, multi-engine Gerlach & Associates LLC
Valparaiso, Indiana
Standard 2020-12-17 ValidFAA registration status code V: Valid registration. All codes
N6707R Cessna
T210F
Fixed-wing, single engine Co-owned owner
New Mexico
Standard 2020-12-17 ValidFAA registration status code V: Valid registration. All codes
N922HB Beech
58
Fixed-wing, multi-engine Individual owner
Texas
Standard 2020-12-17 ValidFAA registration status code V: Valid registration. All codes
N5715K Beech
S35
Fixed-wing, single engine Individual owner
Kansas
Standard 2020-12-16 ValidFAA registration status code V: Valid registration. All codes
N358TC Beech
95-B55 (T42A)
Fixed-wing, multi-engine Eclipse Air Works LLC
Harker Heights, Texas
Standard 2020-12-15 ValidFAA registration status code V: Valid registration. All codes
N77100 Beech
E-55
Fixed-wing, multi-engine Individual owner
North Carolina
Standard 2020-12-15 ValidFAA registration status code V: Valid registration. All codes
N712GD Beech
58
Fixed-wing, multi-engine Individual owner
Arkansas
Standard 2020-12-14 ValidFAA registration status code V: Valid registration. All codes
N104WW Beech
A36
Fixed-wing, single engine Individual owner
Indiana
Standard 2020-12-12 ValidFAA registration status code V: Valid registration. All codes
N1296A Beech
V35A
Fixed-wing, single engine N1296A LLC
Asheville, North Carolina
Standard 2020-12-12 ValidFAA registration status code V: Valid registration. All codes
N140S Beech
58
Fixed-wing, multi-engine Gta Air INC
Addison, Texas
Standard 2020-12-12 ValidFAA registration status code V: Valid registration. All codes
N2064V Beech
58
Fixed-wing, multi-engine Gta Air INC
Addison, Texas
Standard 2020-12-12 ValidFAA registration status code V: Valid registration. All codes
N245JC Beech
F33A
Fixed-wing, single engine Individual owner
New York
Standard 2020-12-12 ValidFAA registration status code V: Valid registration. All codes
N731GT Cessna
A188B
Fixed-wing, single engine Digger Dougs Crop Dusting Services INC
Hollandale, Wisconsin
Restricted 2020-12-12 ValidFAA registration status code V: Valid registration. All codes
N9TC Beech
A36
Fixed-wing, single engine Southwestern Aviation LLC
Pueblo, Colorado
Standard 2020-12-12 ValidFAA registration status code V: Valid registration. All codes
N35TB Beech
V35B
Fixed-wing, single engine Cencalcom INC
Santa Barbara, California
Standard 2020-12-11 ValidFAA registration status code V: Valid registration. All codes
N627KC Beech
F33A
Fixed-wing, single engine Horsehead LLC
Ada, Michigan
Standard 2020-12-11 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.