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
N2104F Cessna
U206
Fixed-wing, single engine Individual owner
Alaska
Standard 2019-09-18 ValidFAA registration status code V: Valid registration. All codes
N8318N Beech
V35A
Fixed-wing, single engine Air Power Associates LLC
O Fallon, Missouri
Standard 2019-09-18 ValidFAA registration status code V: Valid registration. All codes
N6739W Beech
F33A
Fixed-wing, single engine Individual owner
Texas
Standard 2019-09-17 ValidFAA registration status code V: Valid registration. All codes
N777QA Beech
58
Fixed-wing, multi-engine Individual owner
Arkansas
Standard 2019-09-17 ValidFAA registration status code V: Valid registration. All codes
N18KF Beech
A36
Fixed-wing, single engine Nelco INC
Blanchard, Oklahoma
Standard 2019-09-16 ValidFAA registration status code V: Valid registration. All codes
N1932N Beech
F33A
Fixed-wing, single engine Individual owner
Michigan
Standard 2019-09-16 ValidFAA registration status code V: Valid registration. All codes
N66AB Beech
F33A
Fixed-wing, single engine Individual owner
Kentucky
Standard 2019-09-16 ValidFAA registration status code V: Valid registration. All codes
N1737E Cessna
310R
Fixed-wing, multi-engine Keystone Aerial Surveys INC
Philadelphia, Pennsylvania
Standard 2019-09-14 ValidFAA registration status code V: Valid registration. All codes
N2999N Beech
F33A
Fixed-wing, single engine Individual owner
Virginia
Standard 2019-09-14 ValidFAA registration status code V: Valid registration. All codes
N9461M Cessna
210K
Fixed-wing, single engine Master Chief Cricket LLC
Morgan City, Louisiana
Standard 2019-09-14 ValidFAA registration status code V: Valid registration. All codes
N185MN Cessna
A185F
Fixed-wing, single engine Individual owner
Texas
Standard 2019-09-13 ValidFAA registration status code V: Valid registration. All codes
N93934 Cessna
A185F
Fixed-wing, single engine Co-owned owner
Alaska
Standard 2019-09-13 ValidFAA registration status code V: Valid registration. All codes
N161VP Cessna
U206F
Fixed-wing, single engine Conservation Aviation LLC
Washington, District of Columbia
Standard 2019-09-12 ValidFAA registration status code V: Valid registration. All codes
N17827 Beech
V35B
Fixed-wing, single engine Co-owned owner
Virginia
Standard 2019-09-12 ValidFAA registration status code V: Valid registration. All codes
N5CX Cessna
310R
Fixed-wing, multi-engine Individual owner
Arizona
Standard 2019-09-12 ValidFAA registration status code V: Valid registration. All codes
N3799M Beech
A36
Fixed-wing, single engine Individual owner
Ohio
Standard 2019-09-11 ValidFAA registration status code V: Valid registration. All codes
N4449W Beech
58
Fixed-wing, multi-engine Jameson Clarke Enterprises LLC
Houston, Texas
Standard 2019-09-11 ValidFAA registration status code V: Valid registration. All codes
N8032X Beech
F33A
Fixed-wing, single engine Individual owner
Minnesota
Standard 2019-09-11 ValidFAA registration status code V: Valid registration. All codes
N930AA Beech
A36
Fixed-wing, single engine N930Aa LLC
Memphis, Tennessee
Standard 2019-09-11 ValidFAA registration status code V: Valid registration. All codes
N135BW Beech
F33A
Fixed-wing, single engine Individual owner
Nebraska
Standard 2019-09-10 ValidFAA registration status code V: Valid registration. All codes
N16GP Cessna
U206G
Fixed-wing, single engine Deckload Aviation LLC
Kodiak, Alaska
Standard 2019-09-10 ValidFAA registration status code V: Valid registration. All codes
N220MW Beech
A36
Fixed-wing, single engine Lampert Aviation LLC
Phoenix, Arizona
Standard 2019-09-10 ValidFAA registration status code V: Valid registration. All codes
N334PB Beech
F33A
Fixed-wing, single engine Individual owner
Colorado
Standard 2019-09-10 ValidFAA registration status code V: Valid registration. All codes
N413KG Beech
E-55
Fixed-wing, multi-engine Eagle Mountain International Church INC
Newark, Texas
Standard 2019-09-10 ValidFAA registration status code V: Valid registration. All codes
N47AP Cessna
U206G
Fixed-wing, single engine African Parks Aviation INC Trustee
Cheyenne, Wyoming
Standard 2019-09-10 ValidFAA registration status code V: Valid registration. All codes
N6TH Beech
V35B
Fixed-wing, single engine Double I Flyers INC
Wilmington, Delaware
Standard 2019-09-10 ValidFAA registration status code V: Valid registration. All codes
N6747Z Beech
V35B
Fixed-wing, single engine Individual owner
Nebraska
Standard 2019-09-09 ValidFAA registration status code V: Valid registration. All codes
N714QR Cessna
A185F
Fixed-wing, single engine Individual owner
California
Standard 2019-09-09 ValidFAA registration status code V: Valid registration. All codes
N2377F Cessna
210E
Fixed-wing, single engine Individual owner
California
Standard 2019-09-05 ValidFAA registration status code V: Valid registration. All codes
N316JG Beech
A36
Fixed-wing, single engine Individual owner
Texas
Standard 2019-09-05 ValidFAA registration status code V: Valid registration. All codes
N5662K Beech
S35
Fixed-wing, single engine Individual owner
California
Standard 2019-09-05 ValidFAA registration status code V: Valid registration. All codes
N400LF Beech
V35B
Fixed-wing, single engine Individual owner
Minnesota
Standard 2019-09-04 ValidFAA registration status code V: Valid registration. All codes
N6536N Beech
A36
Fixed-wing, single engine Palmetto Wings LLC
Marietta, Georgia
Special flight permit 2019-09-03 ValidFAA registration status code V: Valid registration. All codes
N8482D Cessna
A185E
Fixed-wing, single engine Jkt LLC
Douglas, Wyoming
Standard 2019-08-29 ValidFAA registration status code V: Valid registration. All codes
N36PC Beech
A36
Fixed-wing, single engine Individual owner
California
Standard 2019-08-28 ValidFAA registration status code V: Valid registration. All codes
N5222R Cessna
A185F
Fixed-wing, single engine Lebeouf Bros Towing LLC
Bourg, Louisiana
Standard 2019-08-28 ValidFAA registration status code V: Valid registration. All codes
N205PM Beech
S35
Fixed-wing, single engine Hochstetler Allen D
Fairfield, California
Standard 2019-08-27 ValidFAA registration status code V: Valid registration. All codes
N8781Z Cessna
TP206D
Fixed-wing, single engine Individual owner
Arizona
Standard 2019-08-27 ValidFAA registration status code V: Valid registration. All codes
N3737L Beech
F33A
Fixed-wing, single engine Individual owner
California
Standard 2019-08-26 ValidFAA registration status code V: Valid registration. All codes
N4795F Cessna
P206B
Fixed-wing, single engine Individual owner
Texas
Standard 2019-08-26 ValidFAA registration status code V: Valid registration. All codes
N5476Y Cessna
210N
Fixed-wing, single engine Altura Aviation 2 LLC
Charlotte, North Carolina
Standard 2019-08-26 ValidFAA registration status code V: Valid registration. All codes
N68SM Beech
V35A
Fixed-wing, single engine Individual owner
Texas
Standard 2019-08-26 ValidFAA registration status code V: Valid registration. All codes
N84D Beech
V35B
Fixed-wing, single engine Sankofa Air LLC
Wilmington, Delaware
Standard 2019-08-26 ValidFAA registration status code V: Valid registration. All codes
N1234V Beech
V35B
Fixed-wing, single engine Individual owner
Oklahoma
Standard 2019-08-23 ValidFAA registration status code V: Valid registration. All codes
N1798X Cessna
210L
Fixed-wing, single engine N1798X LLC
Etna Green, Indiana
Standard 2019-08-23 ValidFAA registration status code V: Valid registration. All codes
N2028P Beech
V35B
Fixed-wing, single engine Individual owner
Nebraska
Standard 2019-08-23 ValidFAA registration status code V: Valid registration. All codes
N300TT Beech
F33A
Fixed-wing, single engine Dg Aero LLC
Little Rock, Arkansas
Standard 2019-08-22 ValidFAA registration status code V: Valid registration. All codes
N551BW Beech
F33A
Fixed-wing, single engine 602 Xx LLC
Springdale, Arkansas
Standard 2019-08-21 ValidFAA registration status code V: Valid registration. All codes
N94168 Cessna
A185F
Fixed-wing, single engine Individual owner
Washington
Standard 2019-08-21 ValidFAA registration status code V: Valid registration. All codes
N321JP Cessna
A185F
Fixed-wing, single engine Azure Skyes Holdings LLC
Poulsbo, Washington
Standard 2019-08-19 ValidFAA registration status code V: Valid registration. All codes
N5614K Beech
S35
Fixed-wing, single engine Individual owner
Kentucky
Standard 2019-08-16 ValidFAA registration status code V: Valid registration. All codes
N689T Beech
S35
Fixed-wing, single engine Nunez Manuel
Mcallen, Texas
Standard 2019-08-16 ValidFAA registration status code V: Valid registration. All codes
N210DW Cessna
210G
Fixed-wing, single engine Co-owned owner
Missouri
Standard 2019-08-14 ValidFAA registration status code V: Valid registration. All codes
N28141 Bellanca
17-30A
Fixed-wing, single engine Viking Air INC Trustee
Wilmington, Delaware
Standard 2019-08-14 ValidFAA registration status code V: Valid registration. All codes
N53368 Cessna
A188B
Fixed-wing, single engine Arnt Aerial Spraying INC
Worthington, Minnesota
Restricted 2019-08-14 ValidFAA registration status code V: Valid registration. All codes
N1852W Beech
58
Fixed-wing, multi-engine Individual owner
Iowa
Standard 2019-08-13 ValidFAA registration status code V: Valid registration. All codes
N222CR Beech
A36
Fixed-wing, single engine Sky King II LLC
Blue Ridge, Georgia
Standard 2019-08-13 ValidFAA registration status code V: Valid registration. All codes
N3902A Beech
E-55
Fixed-wing, multi-engine Country Trail LLC
Asheville, North Carolina
Standard 2019-08-13 ValidFAA registration status code V: Valid registration. All codes
N727BV Beech
A36
Fixed-wing, single engine Wheels Up Aviation LLC
Madison, Mississippi
Standard 2019-08-13 ValidFAA registration status code V: Valid registration. All codes
N35LV Beech
V35A
Fixed-wing, single engine Delta Fox Aviation LLC
Fort Worth, Texas
Experimental 2019-08-12 ValidFAA registration status code V: Valid registration. All codes
N58316 Cessna
A185F
Fixed-wing, single engine Individual owner
Alaska
Standard 2019-08-12 ValidFAA registration status code V: Valid registration. All codes
N2736T Beech
V35
Fixed-wing, single engine M & N Leasing CO
Marietta, Georgia
Standard 2019-08-09 ValidFAA registration status code V: Valid registration. All codes
N801T Beech
58
Fixed-wing, multi-engine Majestic Enterprises LTD
Wilmington, Delaware
Standard 2019-08-09 ValidFAA registration status code V: Valid registration. All codes
N25BR Bellanca
17-30A
Fixed-wing, single engine Individual owner
Alabama
Standard 2019-08-08 ValidFAA registration status code V: Valid registration. All codes
N58WG Beech
58
Fixed-wing, multi-engine N58Wg LLC
Shreveport, Louisiana
Standard 2019-08-08 ValidFAA registration status code V: Valid registration. All codes
N64RE Beech
S35
Fixed-wing, single engine Individual owner
Arizona
Standard 2019-08-07 ValidFAA registration status code V: Valid registration. All codes
N98DM Cessna
310R
Fixed-wing, multi-engine Sonrise Aviation LLC
Portland, Indiana
Standard 2019-08-06 ValidFAA registration status code V: Valid registration. All codes
N2027U Beech
58
Fixed-wing, multi-engine Jpb Diversified LLC
Auburndale, Florida
Standard 2019-08-05 ValidFAA registration status code V: Valid registration. All codes
N210LD Cessna
210J
Fixed-wing, single engine Individual owner
Arizona
Standard 2019-08-02 ValidFAA registration status code V: Valid registration. All codes
N278M Beech
58
Fixed-wing, multi-engine Individual owner
Kansas
Standard 2019-08-02 ValidFAA registration status code V: Valid registration. All codes
N22604 Beech
A36
Fixed-wing, single engine Tarten Air INC
Smiths Creek, Michigan
Standard 2019-08-01 ValidFAA registration status code V: Valid registration. All codes
N6670Z Beech
A36
Fixed-wing, single engine Co-owned owner
Texas
Standard 2019-07-30 ValidFAA registration status code V: Valid registration. All codes
N7969M Beech
V35
Fixed-wing, single engine N7969M LLC
Double Oak, Texas
Standard 2019-07-30 ValidFAA registration status code V: Valid registration. All codes
N87332 Cessna
310R
Fixed-wing, multi-engine Odell Ronald W
Peachtree City, Georgia
Standard 2019-07-30 ValidFAA registration status code V: Valid registration. All codes
N8843U Cessna
172F
Fixed-wing, single engine Individual owner
North Carolina
Standard 2019-07-30 ValidFAA registration status code V: Valid registration. All codes
N901CS Beech
F33A
Fixed-wing, single engine Individual owner
Georgia
Standard 2019-07-30 ValidFAA registration status code V: Valid registration. All codes
N80066 Cessna
A185F
Fixed-wing, single engine Individual owner
Pennsylvania
Standard 2019-07-29 ValidFAA registration status code V: Valid registration. All codes
N1892L Beech
V35B
Fixed-wing, single engine Individual owner
Texas
Standard 2019-07-25 ValidFAA registration status code V: Valid registration. All codes
N5090R Cessna
A185F
Fixed-wing, single engine Individual owner
Alaska
Standard 2019-07-25 ValidFAA registration status code V: Valid registration. All codes
N1178T Beech
A36
Fixed-wing, single engine Davis Aviation Group LLC
Gastonia, North Carolina
Standard 2019-07-22 ValidFAA registration status code V: Valid registration. All codes
N1773W Beech
V35B
Fixed-wing, single engine Co-owned owner
Arizona
Standard 2019-07-22 ValidFAA registration status code V: Valid registration. All codes
N4741X Cessna
U206G
Fixed-wing, single engine Individual owner
Colorado
Standard 2019-07-22 ValidFAA registration status code V: Valid registration. All codes
N732YP Cessna
210M
Fixed-wing, single engine Coppage Farm Services INC
Braggadocio, Missouri
Standard 2019-07-22 ValidFAA registration status code V: Valid registration. All codes
N4371W Beech
F33A
Fixed-wing, single engine Individual owner
Wyoming
Standard 2019-07-19 ValidFAA registration status code V: Valid registration. All codes
N87429 Cessna
310R
Fixed-wing, multi-engine Individual owner
Virginia
Standard 2019-07-15 ValidFAA registration status code V: Valid registration. All codes
N644DB Beech
S35
Fixed-wing, single engine Individual owner
Idaho
Standard 2019-07-12 ValidFAA registration status code V: Valid registration. All codes
N23WR Beech
A36
Fixed-wing, single engine Craft Enterprises IV LLC
Beavercreek, Ohio
Standard 2019-07-11 ValidFAA registration status code V: Valid registration. All codes
N408JC Beech
A36
Fixed-wing, single engine N408Jc LLC
Scottsdale, Arizona
Standard 2019-07-11 ValidFAA registration status code V: Valid registration. All codes
N6074S Beech
A36
Fixed-wing, single engine Individual owner
Texas
Standard 2019-07-11 ValidFAA registration status code V: Valid registration. All codes
N9283R Cessna
A188B
Fixed-wing, single engine Allied Sprayers INC
Hawley, Texas
Restricted 2019-07-11 ValidFAA registration status code V: Valid registration. All codes
N7604N Beech
36
Fixed-wing, single engine Individual owner
California
Standard 2019-07-09 ValidFAA registration status code V: Valid registration. All codes
N3464L Cessna
U206B
Fixed-wing, single engine Individual owner
Minnesota
Standard 2019-07-08 ValidFAA registration status code V: Valid registration. All codes
N8095J Beech
F33A
Fixed-wing, single engine Ropen Av LLC
Palm City, Florida
Standard 2019-07-05 ValidFAA registration status code V: Valid registration. All codes
N2797J Cessna
A185E
Fixed-wing, single engine Alaska Ultimate Safaris LLC
Homer, Alaska
Standard 2019-07-03 ValidFAA registration status code V: Valid registration. All codes
N5628L Beech
F33A
Fixed-wing, single engine
Standard 2019-07-03 ValidFAA registration status code V: Valid registration. All codes
N200UG Beech
A36
Fixed-wing, single engine Raw Logistics LLC
Bethel, North Carolina
Standard 2019-06-29 ValidFAA registration status code V: Valid registration. All codes
N1677W Beech
F33A
Fixed-wing, single engine Lagrow II LLC
Coloma, Michigan
Standard 2019-06-28 ValidFAA registration status code V: Valid registration. All codes
N535W Beech
S35
Fixed-wing, single engine Individual owner
Alabama
Standard 2019-06-27 ValidFAA registration status code V: Valid registration. All codes
N1673M Cessna
A185E
Fixed-wing, single engine Individual owner
Alaska
Standard 2019-06-26 ValidFAA registration status code V: Valid registration. All codes
N3843G Cessna
U206B
Fixed-wing, single engine Individual owner
Alaska
Standard 2019-06-26 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.