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
N8KJ Cessna
310R
Fixed-wing, multi-engine Benjabr INC
Fresno, California
Standard 2022-06-28 Reports overdueFAA registration status code N: Non-citizen corporation that has not returned its flight-hour reports. All codes
N925C Beech
A36
Fixed-wing, single engine Individual owner
California
Standard 2022-06-28 ValidFAA registration status code V: Valid registration. All codes
N436JB Beech
V35B
Fixed-wing, single engine 700P LLC
Lewes, Delaware
Standard 2022-06-27 ValidFAA registration status code V: Valid registration. All codes
N18RB Beech
F33A
Fixed-wing, single engine Individual owner
Texas
Standard 2022-06-25 ValidFAA registration status code V: Valid registration. All codes
N80449 Cessna
A185F
Fixed-wing, single engine Individual owner
Alaska
Standard 2022-06-24 ValidFAA registration status code V: Valid registration. All codes
N233WR Cessna
U206G
Fixed-wing, single engine Venture Alaska LLC
Homer, Alaska
Standard 2022-06-23 ValidFAA registration status code V: Valid registration. All codes
N515MA Cessna
A185E
Fixed-wing, single engine Co-owned owner
Texas
Standard 2022-06-23 ValidFAA registration status code V: Valid registration. All codes
N80633 Cessna
A185F
Fixed-wing, single engine Rockalong Holdings LLC
Stanton, Texas
Standard 2022-06-23 ValidFAA registration status code V: Valid registration. All codes
N644CT Cessna
210M
Fixed-wing, single engine C323 Holdings LLC
La Grange, Texas
Standard 2022-06-21 ValidFAA registration status code V: Valid registration. All codes
N54MM Cessna
210N
Fixed-wing, single engine Individual owner
North Carolina
Standard 2022-06-18 ValidFAA registration status code V: Valid registration. All codes
N5732V Beech
V35
Fixed-wing, single engine Individual owner
Missouri
Standard 2022-06-18 ValidFAA registration status code V: Valid registration. All codes
N7772R Beech
V35A
Fixed-wing, single engine Bpk Ventures LLC
Jupiter, Florida
Standard 2022-06-18 ValidFAA registration status code V: Valid registration. All codes
N8151R Beech
58
Fixed-wing, multi-engine Enterprise Aviation Holdings LLC
Wilmington, Delaware
Standard 2022-06-18 ValidFAA registration status code V: Valid registration. All codes
N91152 Cessna
A188B
Fixed-wing, single engine Dt Pralle Enterprise INC
Hampton, Iowa
Restricted 2022-06-18 ValidFAA registration status code V: Valid registration. All codes
N93671 Bellanca
17-30A
Fixed-wing, single engine Co-owned owner
District of Columbia
Standard 2022-06-18 ValidFAA registration status code V: Valid registration. All codes
N29972 Cessna
185
Fixed-wing, single engine Windblown Ranch INC
Echo, Oregon
Standard 2022-06-17 ValidFAA registration status code V: Valid registration. All codes
N9010V Beech
F33A
Fixed-wing, single engine Individual owner
Georgia
Standard 2022-06-17 ValidFAA registration status code V: Valid registration. All codes
N922R Beech
95-C55
Fixed-wing, multi-engine Pink Ibis Air LLC
Vero Beach, Florida
Standard 2022-06-17 ValidFAA registration status code V: Valid registration. All codes
N126H Beech
V35
Fixed-wing, single engine Bockman LTD
Milford, Iowa
Standard 2022-06-16 ValidFAA registration status code V: Valid registration. All codes
N6036G Beech
V35B
Fixed-wing, single engine Bulldawg Aviation LLC
Helena, Montana
Standard 2022-06-15 ValidFAA registration status code V: Valid registration. All codes
N23251 Cessna
A185F
Fixed-wing, single engine Individual owner
Alaska
Standard 2022-06-14 ValidFAA registration status code V: Valid registration. All codes
N91060 Cessna
T207
Fixed-wing, single engine Second Wind Aviation CORP
Friday Harbor, Washington
Standard 2022-06-14 ValidFAA registration status code V: Valid registration. All codes
N3681G Beech
58
Fixed-wing, multi-engine Red Wolf Aviation LLC
Wilmington, Delaware
Standard 2022-06-13 ValidFAA registration status code V: Valid registration. All codes
N612TN Beech
58
Fixed-wing, multi-engine Clear Spot INC
New Smyma Beach, Florida
Standard 2022-06-13 ValidFAA registration status code V: Valid registration. All codes
N1891D Beech
C35
Fixed-wing, single engine Individual owner
Texas
Standard 2022-06-11 ValidFAA registration status code V: Valid registration. All codes
N222AS Beech
D55
Fixed-wing, multi-engine Benham Properties LLC
Sullivan, Indiana
Standard 2022-06-11 ValidFAA registration status code V: Valid registration. All codes
N2531T Navion
NAVION H
Fixed-wing, single engine Co-owned owner
Mississippi
Standard 2022-06-11 ValidFAA registration status code V: Valid registration. All codes
N4DX Cessna
210L
Fixed-wing, single engine Co-owned owner
Georgia
Standard 2022-06-11 ValidFAA registration status code V: Valid registration. All codes
N1183A Beech
V35A
Fixed-wing, single engine Bronson NW INC
Redmond, Oregon
Standard 2022-06-10 ValidFAA registration status code V: Valid registration. All codes
N664DM Beech
V35A
Fixed-wing, single engine Star Air Group LLC
Anchorage, Alaska
Standard 2022-06-10 ValidFAA registration status code V: Valid registration. All codes
N22FB Cessna
210L
Fixed-wing, single engine Individual owner
Kentucky
Standard 2022-06-02 ValidFAA registration status code V: Valid registration. All codes
N52MM Cessna
210N
Fixed-wing, single engine Happy Sky LLC
Brooklyn, New York
Standard 2022-06-01 ValidFAA registration status code V: Valid registration. All codes
N6678S Beech
F33A
Fixed-wing, single engine Co-owned owner
Iowa
Standard 2022-06-01 ValidFAA registration status code V: Valid registration. All codes
N17LG Beech
95-C55
Fixed-wing, multi-engine Green & Green Construction of Grenada INC
Grenada, Mississippi
Standard 2022-05-28 ValidFAA registration status code V: Valid registration. All codes
N9050S Beech
V35
Fixed-wing, single engine Individual owner
Oklahoma
Standard 2022-05-28 ValidFAA registration status code V: Valid registration. All codes
N1821R Cessna
A185F
Fixed-wing, single engine Individual owner
Minnesota
Standard 2022-05-27 ValidFAA registration status code V: Valid registration. All codes
N4784F Cessna
P206B
Fixed-wing, single engine Individual owner
California
Standard 2022-05-27 ValidFAA registration status code V: Valid registration. All codes
N111CV Beech
S35
Fixed-wing, single engine N2Xt LLC
Austin, Texas
Standard 2022-05-26 ValidFAA registration status code V: Valid registration. All codes
N22XG Beech
V35
Fixed-wing, single engine Individual owner
Nevada
Standard 2022-05-26 ValidFAA registration status code V: Valid registration. All codes
N37RF Cessna
A185F
Fixed-wing, single engine Adams Aviation Services INC Trustee
Wilmington, Delaware
Experimental 2022-05-26 ValidFAA registration status code V: Valid registration. All codes
N1043F Cessna
A185F
Fixed-wing, single engine Co-owned owner
Alaska
Standard 2022-05-25 ValidFAA registration status code V: Valid registration. All codes
N561 Beech
E-55
Fixed-wing, multi-engine Individual owner
Arizona
Standard 2022-05-25 ValidFAA registration status code V: Valid registration. All codes
N140NL Beech
35-C33A
Fixed-wing, single engine N140Nl LLC
Maumelle, Arkansas
Standard 2022-05-24 ValidFAA registration status code V: Valid registration. All codes
N5713V Beech
95-C55
Fixed-wing, multi-engine Caribbean Dental Lab LLC
St Thomas, U.S. Virgin Islands
Standard 2022-05-24 ValidFAA registration status code V: Valid registration. All codes
N598AB Cessna
A185F
Fixed-wing, single engine Co-owned owner
Minnesota
Standard 2022-05-24 ValidFAA registration status code V: Valid registration. All codes
N761AL Cessna
210M
Fixed-wing, single engine Pacific Valley Aviation INC
Arbuckle, California
Standard 2022-05-24 ValidFAA registration status code V: Valid registration. All codes
N333W Beech
E-55
Fixed-wing, multi-engine Danarich LLC
Rancho Mirage, California
Standard 2022-05-23 ValidFAA registration status code V: Valid registration. All codes
N756QP Cessna
U206G
Fixed-wing, single engine Kako Retreat Center INC
Russian Mission, Alaska
Standard 2022-05-23 ValidFAA registration status code V: Valid registration. All codes
N100AN Beech
V35B
Fixed-wing, single engine Watson Family Investments LLC
Houston, Texas
Standard 2022-05-21 ValidFAA registration status code V: Valid registration. All codes
N2318F Cessna
210E
Fixed-wing, single engine Be Dozer LLC
Guy, Arkansas
Standard 2022-05-21 ValidFAA registration status code V: Valid registration. All codes
N861D Beech
E-55
Fixed-wing, multi-engine Airtipp LLC
Tipp City, Ohio
Standard 2022-05-20 ValidFAA registration status code V: Valid registration. All codes
N133AG Beech
F33A
Fixed-wing, single engine Raritan Valley Flying School
Princeton, New Jersey
Standard 2022-05-19 ValidFAA registration status code V: Valid registration. All codes
N8198B Beech
F33A
Fixed-wing, single engine Individual owner
New York
Standard 2022-05-19 ValidFAA registration status code V: Valid registration. All codes
N2964T Aero Commander
200D
Fixed-wing, single engine Mallard Aviation LLC
Manchester, New Hampshire
Standard 2022-05-18 ValidFAA registration status code V: Valid registration. All codes
N99BD Beech
A36
Fixed-wing, single engine Ocm Aviation LLC
Garner, North Carolina
Standard 2022-05-18 ValidFAA registration status code V: Valid registration. All codes
N2107F Cessna
U206
Fixed-wing, single engine Co-owned owner
Colorado
Standard 2022-05-17 ValidFAA registration status code V: Valid registration. All codes
N6030Z Beech
F33A
Fixed-wing, single engine Beeline Aero LLC
Scottsdale, Arizona
Standard 2022-05-17 ValidFAA registration status code V: Valid registration. All codes
N6131F Cessna
210H
Fixed-wing, single engine Individual owner
Colorado
Standard 2022-05-17 ValidFAA registration status code V: Valid registration. All codes
N9289Q Beech
V35B
Fixed-wing, single engine Individual owner
Texas
Standard 2022-05-17 ValidFAA registration status code V: Valid registration. All codes
N2016D Beech
V35
Fixed-wing, single engine Rbc Aero
Mooresville, North Carolina
Standard 2022-05-16 ValidFAA registration status code V: Valid registration. All codes
N4243B Bellanca
17-30A
Fixed-wing, single engine 43 Bravo LLC
Maple Grove, Minnesota
Standard 2022-05-16 ValidFAA registration status code V: Valid registration. All codes
N2085Y Cessna
A185F
Fixed-wing, single engine Lima Romeo Kilo Golf LP
Worthington, Indiana
Standard 2022-05-14 ValidFAA registration status code V: Valid registration. All codes
N7965K Beech
S35
Fixed-wing, single engine Individual owner
Wyoming
Standard 2022-05-14 ValidFAA registration status code V: Valid registration. All codes
N8797Z Cessna
P206D
Fixed-wing, single engine Cjc Enterprises LLC
Erda, Utah
Standard 2022-05-14 ValidFAA registration status code V: Valid registration. All codes
N211AA Beech
E-55
Fixed-wing, multi-engine 1776 Aviation LLC
Kalispell, Montana
Standard 2022-05-13 ValidFAA registration status code V: Valid registration. All codes
N3485L Cessna
U206B
Fixed-wing, single engine Individual owner
Minnesota
Standard 2022-05-12 ValidFAA registration status code V: Valid registration. All codes
N72AV Beech
A36
Fixed-wing, single engine Avalair Aircraft Management LLC
Brookshire, Texas
Standard 2022-05-12 ValidFAA registration status code V: Valid registration. All codes
N1979 Beech
A36
Fixed-wing, single engine Individual owner
Texas
Standard 2022-05-10 ValidFAA registration status code V: Valid registration. All codes
N35RE Beech
V35A
Fixed-wing, single engine Dakota Aero INC
Steamboat Springs, Colorado
Standard 2022-05-10 ValidFAA registration status code V: Valid registration. All codes
N6114R Cessna
210F
Fixed-wing, single engine Jstream Lc
Sheridan, Wyoming
Standard 2022-05-09 ValidFAA registration status code V: Valid registration. All codes
N4896C Cessna
A185F
Fixed-wing, single engine Flying Paws LLC
Arvada, Colorado
Multiple 2022-05-07 ValidFAA registration status code V: Valid registration. All codes
N171KS Cessna
210N
Fixed-wing, single engine Vida Vibrante LLC
San Juan, Puerto Rico
Standard 2022-05-06 ValidFAA registration status code V: Valid registration. All codes
N185NC Cessna
A185F
Fixed-wing, single engine Island City Seaplanes INC
Cordova, Alaska
Standard 2022-05-06 ValidFAA registration status code V: Valid registration. All codes
N5907F Cessna
210G
Fixed-wing, single engine Island City Seaplanes INC
Cordova, Alaska
Standard 2022-05-06 ValidFAA registration status code V: Valid registration. All codes
N2184F Cessna
U206
Fixed-wing, single engine Individual owner
Texas
Standard 2022-05-05 ValidFAA registration status code V: Valid registration. All codes
N2324F Cessna
210E
Fixed-wing, single engine Individual owner
Virginia
Standard 2022-05-05 ValidFAA registration status code V: Valid registration. All codes
N4905A Cessna
310R
Fixed-wing, multi-engine Individual owner
Minnesota
Standard 2022-05-04 ValidFAA registration status code V: Valid registration. All codes
N746DM Beech
58
Fixed-wing, multi-engine Birds Birds LLC
Bradenton, Florida
Standard 2022-05-04 ValidFAA registration status code V: Valid registration. All codes
N6JC Beech
F33A
Fixed-wing, single engine Raa Investments LLC
Albertville, Alabama
Standard 2022-05-02 ValidFAA registration status code V: Valid registration. All codes
N3847X Beech
V35B
Fixed-wing, single engine Individual owner
Indiana
Standard 2022-04-30 ValidFAA registration status code V: Valid registration. All codes
N4634U Cessna
U206G
Fixed-wing, single engine 4634U LLC
Taylor, Arizona
Standard 2022-04-30 ValidFAA registration status code V: Valid registration. All codes
N7152N Beech
D55
Fixed-wing, multi-engine Co-owned owner
Indiana
Standard 2022-04-30 ValidFAA registration status code V: Valid registration. All codes
N100PS Beech
F33A
Fixed-wing, single engine G & C Property Hc LLC
San Francisco, California
Standard 2022-04-29 ValidFAA registration status code V: Valid registration. All codes
N567Z Beech
35-C33A
Fixed-wing, single engine Zulu Aerospace Services LLC
Prescott, Arizona
Standard 2022-04-26 ValidFAA registration status code V: Valid registration. All codes
N322HA Cessna
402C
Fixed-wing, multi-engine Air Flight INC
Fort Lauderdale, Florida
Standard 2022-04-25 ValidFAA registration status code V: Valid registration. All codes
N39861 Bellanca
17-30A
Fixed-wing, single engine Individual owner
Texas
Standard 2022-04-23 ValidFAA registration status code V: Valid registration. All codes
N806CT Cessna
A185F
Fixed-wing, single engine Ct Air LLC
Clovis, New Mexico
Standard 2022-04-22 ValidFAA registration status code V: Valid registration. All codes
N8679Q Beech
S35
Fixed-wing, single engine Eagle Flight Services LLC
Lake Oswego, Oregon
Standard 2022-04-22 ValidFAA registration status code V: Valid registration. All codes
N8269V Beech
A36
Fixed-wing, single engine N8269V INC
Lewes, Delaware
Standard 2022-04-20 ValidFAA registration status code V: Valid registration. All codes
N9017V Beech
A36
Fixed-wing, single engine Post60 LLC
Lake Oswego, Oregon
Standard 2022-04-20 ValidFAA registration status code V: Valid registration. All codes
N922SC Beech
35-C33A
Fixed-wing, single engine Individual owner
California
Standard 2022-04-20 ValidFAA registration status code V: Valid registration. All codes
N3808Q Beech
F33A
Fixed-wing, single engine Jordan Klein DBA
Summerfield, Florida
Standard 2022-04-19 ValidFAA registration status code V: Valid registration. All codes
N22334 Beech
E-55
Fixed-wing, multi-engine Fredericks Hall Aviation LLC
Mineral, Virginia
Standard 2022-04-18 ValidFAA registration status code V: Valid registration. All codes
N7124N Beech
V35A
Fixed-wing, single engine Individual owner
Texas
Standard 2022-04-15 ValidFAA registration status code V: Valid registration. All codes
N18333 Beech
E-55
Fixed-wing, multi-engine Rjb Air LLC
Lexington, Kentucky
Standard 2022-04-09 ValidFAA registration status code V: Valid registration. All codes
N2560X Cessna
P206
Fixed-wing, single engine Cd Hillcroft Aviation LLC
Superior, Colorado
Standard 2022-04-09 ValidFAA registration status code V: Valid registration. All codes
N5013Q Cessna
340
Fixed-wing, multi-engine Co-owned owner
Florida
Standard 2022-04-08 ValidFAA registration status code V: Valid registration. All codes
N64CG Beech
S35
Fixed-wing, single engine Individual owner
South Dakota
Standard 2022-04-07 ValidFAA registration status code V: Valid registration. All codes
N555KM Beech
V35
Fixed-wing, single engine Individual owner
New Jersey
Standard 2022-04-06 ValidFAA registration status code V: Valid registration. All codes
N917JK Beech
A36
Fixed-wing, single engine Jen-Kel Aviation LLC
Sarasota, Florida
Standard 2022-04-06 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.