The U.S. aircraft register, updated daily
Engines · piston (reciprocating) · data as of October 9, 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
N5QB Beech
V35B
Fixed-wing, single engine Individual owner
Oklahoma
Standard 2002-10-11 ValidFAA registration status code V: Valid registration. All codes
N9415S Beech
95-C55
Fixed-wing, multi-engine Wasson-Ece Instrumentation
Fort Collins, Colorado
Standard 2002-10-09 ValidFAA registration status code V: Valid registration. All codes
N39TF Beech
F33A
Fixed-wing, single engine Individual owner
Florida
Standard 2002-10-08 ValidFAA registration status code V: Valid registration. All codes
N2522T Navion
NAVION H
Fixed-wing, single engine Individual owner
Texas
Standard 2002-09-24 ValidFAA registration status code V: Valid registration. All codes
N2843W Beech
V35B
Fixed-wing, single engine J & L Equipment Sales & Rental LLC
Andersonville, Tennessee
Standard 2002-09-20 ValidFAA registration status code V: Valid registration. All codes
N2693K Beech
F33A
Fixed-wing, single engine Individual owner
Tennessee
Standard 2002-09-11 ValidFAA registration status code V: Valid registration. All codes
N368HP Beech
A36
Fixed-wing, single engine High Performance Aircraft INC
El Cajon, California
Standard 2002-09-10 ValidFAA registration status code V: Valid registration. All codes
N85JS Beech
F33A
Fixed-wing, single engine 85 Juliet Sierra LLC
Chico, California
Standard 2002-09-06 ValidFAA registration status code V: Valid registration. All codes
N8496Q Cessna
U206F
Fixed-wing, single engine Individual owner
Texas
Standard 2002-08-27 ValidFAA registration status code V: Valid registration. All codes
N102BN Cessna
U206G
Fixed-wing, single engine Delta State University
Cleveland, Mississippi
Standard 2002-08-26 ValidFAA registration status code V: Valid registration. All codes
N3891Y Cessna
210D
Fixed-wing, single engine Individual owner
California
Standard 2002-08-23 ValidFAA registration status code V: Valid registration. All codes
N6860Q Beech
S35
Fixed-wing, single engine Co-owned owner
California
Standard 2002-08-23 ValidFAA registration status code V: Valid registration. All codes
N4362W Beech
A36
Fixed-wing, single engine Individual owner
Pennsylvania
Standard 2002-08-21 ValidFAA registration status code V: Valid registration. All codes
N84R Beech
A36
Fixed-wing, single engine Individual owner
Tennessee
Standard 2002-08-21 ValidFAA registration status code V: Valid registration. All codes
N2773T Beech
95-C55
Fixed-wing, multi-engine Individual owner
California
Standard 2002-08-20 ValidFAA registration status code V: Valid registration. All codes
N160U Beech
E33C
Fixed-wing, single engine Crane Rental Service INC
Tempe, Arizona
Standard 2002-08-12 ValidFAA registration status code V: Valid registration. All codes
N88TP Beech
36
Fixed-wing, single engine Individual owner
Nevada
Standard 2002-08-05 ValidFAA registration status code V: Valid registration. All codes
N416D Beech
58
Fixed-wing, multi-engine Mcginnis Aviation LLC
Kentwood, Michigan
Standard 2002-07-23 ValidFAA registration status code V: Valid registration. All codes
N84AK Beech
A36
Fixed-wing, single engine Metro Aviation INC
Shreveport, Louisiana
Standard 2002-07-17 ValidFAA registration status code V: Valid registration. All codes
N87RW Cessna
U206C
Fixed-wing, single engine Sunward CORP
Denver, Colorado
Standard 2002-07-11 ValidFAA registration status code V: Valid registration. All codes
N899RB Beech
F33A
Fixed-wing, single engine Individual owner
New York
Standard 2002-07-10 ValidFAA registration status code V: Valid registration. All codes
N4053B Bellanca
17-30A
Fixed-wing, single engine Individual owner
Oklahoma
Standard 2002-07-08 ValidFAA registration status code V: Valid registration. All codes
N669RP Beech
A36
Fixed-wing, single engine Individual owner
Texas
Standard 2002-07-03 ValidFAA registration status code V: Valid registration. All codes
N744T Beech
E-55
Fixed-wing, multi-engine Individual owner
Kentucky
Standard 2002-07-03 ValidFAA registration status code V: Valid registration. All codes
N858TC Beech
58TC
Fixed-wing, multi-engine H2 Transportation LLC
Macon, Georgia
Standard 2002-07-03 ValidFAA registration status code V: Valid registration. All codes
N262AP Cessna
A185F
Fixed-wing, single engine Individual owner
Alaska
Multiple 2002-07-02 ValidFAA registration status code V: Valid registration. All codes
N41FR Beech
A36
Fixed-wing, single engine Oplnet LLC
Arlington, Virginia
Standard 2002-07-01 ValidFAA registration status code V: Valid registration. All codes
N4317W Beech
V35B
Fixed-wing, single engine Individual owner
California
Standard 2002-07-01 ValidFAA registration status code V: Valid registration. All codes
N94018 Cessna
210L
Fixed-wing, single engine Northern Air Transport INC
Mora, Minnesota
Standard 2002-06-27 ValidFAA registration status code V: Valid registration. All codes
N9418Q Beech
A36
Fixed-wing, single engine Bonanza Partners LLC
Taos Ski Valley, New Mexico
Standard 2002-06-25 ValidFAA registration status code V: Valid registration. All codes
N18521 Cessna
A185F
Fixed-wing, single engine Island Air LLC
Eagan, Minnesota
Standard 2002-06-20 ValidFAA registration status code V: Valid registration. All codes
N210SY Cessna
210N
Fixed-wing, single engine Bluegrass Air Systems LLC
Nicholasville, Kentucky
Standard 2002-06-20 ValidFAA registration status code V: Valid registration. All codes
N2024G Beech
V35B
Fixed-wing, single engine Co-owned owner
Oregon
Standard 2002-06-10 ValidFAA registration status code V: Valid registration. All codes
N8018V Cessna
A188
Fixed-wing, single engine Light Flight LTD
Lehighton, Pennsylvania
Standard 2002-06-05 ValidFAA registration status code V: Valid registration. All codes
N999KA Beech
V35A
Fixed-wing, single engine Individual owner
Texas
Standard 2002-06-05 ValidFAA registration status code V: Valid registration. All codes
N5630S Beech
35-C33A
Fixed-wing, single engine Individual owner
Oklahoma
Standard 2002-05-31 ValidFAA registration status code V: Valid registration. All codes
N8903U Beech
S35
Fixed-wing, single engine Individual owner
Michigan
Standard 2002-05-29 ValidFAA registration status code V: Valid registration. All codes
N5298U Cessna
U206
Fixed-wing, single engine Individual owner
Florida
Standard 2002-05-23 ValidFAA registration status code V: Valid registration. All codes
N7247N Cessna
U206G
Fixed-wing, single engine Individual owner
New York
Standard 2002-05-16 ValidFAA registration status code V: Valid registration. All codes
N7378R Beech
F33A
Fixed-wing, single engine Larson Aviation LLC
Waukegan, Illinois
Standard 2002-05-13 ValidFAA registration status code V: Valid registration. All codes
N185JD Cessna
A185F
Fixed-wing, single engine Padden Geary L
Duluth, Minnesota
Standard 2002-05-10 ValidFAA registration status code V: Valid registration. All codes
N14JP Beech
F33C
Fixed-wing, single engine Dakota Aircraft INC
Pierre, South Dakota
Standard 2002-05-02 ValidFAA registration status code V: Valid registration. All codes
N1757G Beech
95-C55
Fixed-wing, multi-engine Matrix Aviation INC
Ponte Vedra Beach, Florida
Standard 2002-05-01 ValidFAA registration status code V: Valid registration. All codes
N236CH Beech
A36
Fixed-wing, single engine Gta Air INC
Addison, Texas
Standard 2002-04-30 ValidFAA registration status code V: Valid registration. All codes
N44GN Beech
F33A
Fixed-wing, single engine Individual owner
California
Standard 2002-04-30 ValidFAA registration status code V: Valid registration. All codes
N53211 Cessna
A188B
Fixed-wing, single engine Anderson Aerial Spraying Service INC
Canby, Minnesota
Restricted 2002-04-30 ValidFAA registration status code V: Valid registration. All codes
N9486R Cessna
A188B
Fixed-wing, single engine Anderson Aerial Spraying Serv INC
Canby, Minnesota
Restricted 2002-04-24 ValidFAA registration status code V: Valid registration. All codes
N185WX Cessna
A185F
Fixed-wing, single engine Individual owner
Colorado
Standard 2002-04-23 ValidFAA registration status code V: Valid registration. All codes
N268R Beech
A36
Fixed-wing, single engine Kalhart Transportation Services INC
Rancho Santa Fe, California
Standard 2002-04-10 ValidFAA registration status code V: Valid registration. All codes
N5001R Cessna
A185F
Fixed-wing, single engine Le Conte LLC
Anchorage, Alaska
Standard 2002-04-03 ValidFAA registration status code V: Valid registration. All codes
N136CW Beech
A36
Fixed-wing, single engine Cdh Properties LLC
Oklahoma City, Oklahoma
Standard 2002-04-02 ValidFAA registration status code V: Valid registration. All codes
N2492S Cessna
T210L
Fixed-wing, single engine Sierra Hotel Aircraft LLC
Wilmington, Delaware
Standard 2002-03-27 ValidFAA registration status code V: Valid registration. All codes
N29HP Beech
A36
Fixed-wing, single engine Individual owner
New Jersey
Standard 2002-03-25 ValidFAA registration status code V: Valid registration. All codes
N5179U Cessna
206
Fixed-wing, single engine Power Flight LLC
Las Vegas, Nevada
Standard 2002-03-20 ValidFAA registration status code V: Valid registration. All codes
N1728R Cessna
A185F
Fixed-wing, single engine Co-owned owner
Minnesota
Multiple 2002-03-11 ValidFAA registration status code V: Valid registration. All codes
N82BT Tonner Brian P
CA6-WB
Fixed-wing, single engine Individual owner
Florida
Experimental 2002-03-06 ValidFAA registration status code V: Valid registration. All codes
N8344N Beech
E33A
Fixed-wing, single engine Individual owner
Florida
Standard 2002-02-28 ValidFAA registration status code V: Valid registration. All codes
N119AC Beech
58
Fixed-wing, multi-engine Individual owner
Florida
Standard 2002-02-25 ValidFAA registration status code V: Valid registration. All codes
N1559F Cessna
185D
Fixed-wing, single engine Individual owner
Alaska
Standard 2002-02-20 ValidFAA registration status code V: Valid registration. All codes
N429DL Cessna
210L
Fixed-wing, single engine Individual owner
Florida
Standard 2002-02-19 ValidFAA registration status code V: Valid registration. All codes
N460CC Cessna
A185E
Fixed-wing, single engine American Falconry INC
Dayton, Wyoming
Standard 2002-02-19 ValidFAA registration status code V: Valid registration. All codes
N9067Q Beech
V35B
Fixed-wing, single engine Individual owner
Montana
Standard 2002-02-13 ValidFAA registration status code V: Valid registration. All codes
N8932U Beech
S35
Fixed-wing, single engine S35 Aviation LLC
Lakeland, Florida
Standard 2002-02-05 ValidFAA registration status code V: Valid registration. All codes
N44SP Beech
E-55
Fixed-wing, multi-engine Awh Ventures INC
Houston, Texas
Standard 2002-01-29 ValidFAA registration status code V: Valid registration. All codes
N38175 Beech
F33A
Fixed-wing, single engine Fhg Springbrook CORP
Wilmington, Delaware
Standard 2002-01-28 ValidFAA registration status code V: Valid registration. All codes
N9787E Bellanca
17-30A
Fixed-wing, single engine Individual owner
California
Standard 2002-01-16 ValidFAA registration status code V: Valid registration. All codes
N7309V Bellanca
17-30
Fixed-wing, single engine Individual owner
Oklahoma
Standard 2002-01-10 ValidFAA registration status code V: Valid registration. All codes
N13297 Cessna
180K
Fixed-wing, single engine Individual owner
Oregon
Standard 2001-11-30 ValidFAA registration status code V: Valid registration. All codes
N562U Beech
D55
Fixed-wing, multi-engine Sua LLC
Artesia, New Mexico
Standard 2001-11-30 ValidFAA registration status code V: Valid registration. All codes
N7504N Beech
36
Fixed-wing, single engine Individual owner
Indiana
Standard 2001-11-29 ValidFAA registration status code V: Valid registration. All codes
N732BH Cessna
210L
Fixed-wing, single engine Seven Eagles Aviation Lc
Gainesville, Florida
Standard 2001-11-19 ValidFAA registration status code V: Valid registration. All codes
N415JL Beech
A36
Fixed-wing, single engine Individual owner
Massachusetts
Standard 2001-11-15 ValidFAA registration status code V: Valid registration. All codes
N777JM Beech
V35
Fixed-wing, single engine Individual owner
Texas
Standard 2001-11-14 ValidFAA registration status code V: Valid registration. All codes
N4241B Bellanca
17-30A
Fixed-wing, single engine Bor-It Mfg CO INC
Ashland, Ohio
Standard 2001-11-06 ValidFAA registration status code V: Valid registration. All codes
N9317W Cessna
U206
Fixed-wing, single engine Individual owner
Texas
Standard 2001-11-06 ValidFAA registration status code V: Valid registration. All codes
N6152F Cessna
210H
Fixed-wing, single engine Individual owner
Florida
Standard 2001-11-05 ValidFAA registration status code V: Valid registration. All codes
N93098 Cessna
A185F
Fixed-wing, single engine Co-owned owner
Alaska
Restricted 2001-11-02 ValidFAA registration status code V: Valid registration. All codes
N401AT Cessna
401
Fixed-wing, multi-engine Individual owner
Texas
Standard 2001-10-29 ValidFAA registration status code V: Valid registration. All codes
N2LH Beech
F33A
Fixed-wing, single engine Individual owner
Arizona
Standard 2001-10-26 ValidFAA registration status code V: Valid registration. All codes
N18462 Beech
A36
Fixed-wing, single engine Individual owner
Ohio
Standard 2001-10-25 ValidFAA registration status code V: Valid registration. All codes
N259T Beech
V35A
Fixed-wing, single engine Individual owner
Texas
Standard 2001-10-25 ValidFAA registration status code V: Valid registration. All codes
N139TA Beech
V35B
Fixed-wing, single engine Individual owner
Washington
Standard 2001-10-24 ValidFAA registration status code V: Valid registration. All codes
N310RD Cessna
310R
Fixed-wing, multi-engine Southern Illinois University Board of Trustee
Murphysboro, Illinois
Standard 2001-10-11 ValidFAA registration status code V: Valid registration. All codes
N459CC Cessna
185E
Fixed-wing, single engine Individual owner
Montana
Standard 2001-10-09 ValidFAA registration status code V: Valid registration. All codes
N29151 Cessna
TU206C
Fixed-wing, single engine Inland Aerial Surveys INC
Riverside, California
Standard 2001-10-04 ValidFAA registration status code V: Valid registration. All codes
N5745V Beech
V35
Fixed-wing, single engine Bonanza N5745V LLC
Colorado Springs, Colorado
Standard 2001-09-26 ValidFAA registration status code V: Valid registration. All codes
N207VW Cessna
207
Fixed-wing, single engine Vanderwel Mark e
Monroe, Washington
Standard 2001-09-21 ValidFAA registration status code V: Valid registration. All codes
N4739F Cessna
P206B
Fixed-wing, single engine Co-owned owner
Texas
Standard 2001-09-21 ValidFAA registration status code V: Valid registration. All codes
N4626F Cessna
P206A
Fixed-wing, single engine Krumpe Brothers LLC
Hagerstown, Maryland
Standard 2001-09-13 ValidFAA registration status code V: Valid registration. All codes
N28189 Bellanca
17-30A
Fixed-wing, single engine Individual owner
Florida
Standard 2001-09-12 ValidFAA registration status code V: Valid registration. All codes
N926LT Cessna
A188
Fixed-wing, single engine Individual owner
South Dakota
Multiple 2001-09-12 ValidFAA registration status code V: Valid registration. All codes
N8826M Beech
S35
Fixed-wing, single engine Aeolus LLC
Portland, Maine
Standard 2001-09-10 ValidFAA registration status code V: Valid registration. All codes
N8374Q Cessna
U206F
Fixed-wing, single engine 8374Q LLC
Gig Harbor, Washington
Standard 2001-09-07 ValidFAA registration status code V: Valid registration. All codes
N5698K Beech
S35
Fixed-wing, single engine Individual owner
Texas
Standard 2001-08-31 ValidFAA registration status code V: Valid registration. All codes
N5931S Beech
V35
Fixed-wing, single engine Renton Flyers INC
Woodinville, Washington
Standard 2001-08-14 ValidFAA registration status code V: Valid registration. All codes
N6321X Beech
A36
Fixed-wing, single engine Lee Aero LLC
Wichita, Kansas
Standard 2001-08-13 ValidFAA registration status code V: Valid registration. All codes
N9431S Beech
V35
Fixed-wing, single engine Individual owner
Texas
Standard 2001-08-09 ValidFAA registration status code V: Valid registration. All codes
N205NR Cessna
A185F
Fixed-wing, single engine State of Minnesota
Grand Rapids, Minnesota
Standard 2001-08-08 ValidFAA registration status code V: Valid registration. All codes
N827EB Beech
58
Fixed-wing, multi-engine Ebor Management INC
Alpharetta, Georgia
Special flight permit 2001-08-06 ValidFAA registration status code V: Valid registration. All codes
N185TK Cessna
A185F
Fixed-wing, single engine Individual owner
California
Standard 2001-08-01 ValidFAA registration status code V: Valid registration. All codes

Source: FAA Civil Aviation Registry, Releasable Aircraft Database (the engine reference table and each aircraft's engine code), October 9, 2026. Horsepower and thrust are the FAA's figures for the series, not for a particular aircraft.