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
N64609 Beech
A36
Fixed-wing, single engine SR Aviation LLC
Pocola, Oklahoma
Standard 2018-08-02 ValidFAA registration status code V: Valid registration. All codes
N222L Cessna
320E
Fixed-wing, multi-engine Two Motor Odor LLC
Paris, Texas
Standard 2018-08-01 ValidFAA registration status code V: Valid registration. All codes
N77SM Beech
E-55
Fixed-wing, multi-engine Individual owner
Montana
Standard 2018-08-01 ValidFAA registration status code V: Valid registration. All codes
N4156B Bellanca
17-30A
Fixed-wing, single engine Individual owner
North Carolina
Standard 2018-07-30 ValidFAA registration status code V: Valid registration. All codes
N5731M Cessna
310P
Fixed-wing, multi-engine Individual owner
Missouri
Standard 2018-07-30 ValidFAA registration status code V: Valid registration. All codes
N89AU Beech
F33A
Fixed-wing, single engine Individual owner
Texas
Standard 2018-07-30 ValidFAA registration status code V: Valid registration. All codes
N6696V Bellanca
17-30
Fixed-wing, single engine Individual owner
South Carolina
Standard 2018-07-26 ValidFAA registration status code V: Valid registration. All codes
N9683Y Beech
D55
Fixed-wing, multi-engine Individual owner
Montana
Standard 2018-07-26 ValidFAA registration status code V: Valid registration. All codes
N4953E Cessna
A185F
Fixed-wing, single engine Inland Fisheries and Wildlife
Augusta, Maine
Standard 2018-07-24 ValidFAA registration status code V: Valid registration. All codes
N722PD Cessna
T210L
Fixed-wing, single engine W O Zangger and Son INC
North Loup, Nebraska
Standard 2018-07-24 ValidFAA registration status code V: Valid registration. All codes
N809BL Beech
A36
Fixed-wing, single engine Boluyt John A Trustee
Lowell, Michigan
Standard 2018-07-24 ValidFAA registration status code V: Valid registration. All codes
N1333S Bellanca
17-30A
Fixed-wing, single engine Individual owner
Texas
Standard 2018-07-23 ValidFAA registration status code V: Valid registration. All codes
N310ED Cessna
310R
Fixed-wing, multi-engine Individual owner
Georgia
Standard 2018-07-23 ValidFAA registration status code V: Valid registration. All codes
N756MA Cessna
U206G
Fixed-wing, single engine Fly-N-Bus Aviation LLC
Parker, Colorado
Standard 2018-07-20 ValidFAA registration status code V: Valid registration. All codes
N9143Q Beech
V35B
Fixed-wing, single engine Individual owner
Washington
Standard 2018-07-20 ValidFAA registration status code V: Valid registration. All codes
N1310C Watson Thomas
STEEN SKYBOLT
Fixed-wing, single engine Individual owner
Illinois
Experimental 2018-07-16 ValidFAA registration status code V: Valid registration. All codes
N524BL Cessna
210D
Fixed-wing, single engine Double Lazy H LLC
Delta, Colorado
Standard 2018-07-16 ValidFAA registration status code V: Valid registration. All codes
N678F Beech
D55
Fixed-wing, multi-engine Chapel On the Bayou Ministries LLC
Raceland, Louisiana
Standard 2018-07-12 ValidFAA registration status code V: Valid registration. All codes
N756MZ Cessna
U206G
Fixed-wing, single engine Individual owner
Oklahoma
Standard 2018-07-12 ValidFAA registration status code V: Valid registration. All codes
N37BR Beech
A36
Fixed-wing, single engine C&D Pharmaceuticals Berry INC
Berry, Alabama
Standard 2018-07-11 ValidFAA registration status code V: Valid registration. All codes
N6741W Beech
A36
Fixed-wing, single engine Individual owner
New Jersey
Standard 2018-07-11 ValidFAA registration status code V: Valid registration. All codes
N8063E Cessna
U206C
Fixed-wing, single engine Individual owner
Alaska
Standard 2018-07-11 ValidFAA registration status code V: Valid registration. All codes
N3668U Beech
A36
Fixed-wing, single engine Individual owner
California
Standard 2018-07-10 ValidFAA registration status code V: Valid registration. All codes
N4869C Cessna
A185F
Fixed-wing, single engine Individual owner
North Carolina
Standard 2018-07-10 ValidFAA registration status code V: Valid registration. All codes
N123RG Beech
V35A
Fixed-wing, single engine Individual owner
Montana
Standard 2018-07-09 ValidFAA registration status code V: Valid registration. All codes
N33YM Beech
F33A
Fixed-wing, single engine Individual owner
California
Standard 2018-07-09 ValidFAA registration status code V: Valid registration. All codes
N47SP Cessna
T-310P
Fixed-wing, multi-engine Individual owner
Georgia
Standard 2018-07-09 ValidFAA registration status code V: Valid registration. All codes
N668ZS Beech
V35B
Fixed-wing, single engine Individual owner
Florida
Standard 2018-07-09 ValidFAA registration status code V: Valid registration. All codes
N210RZ Cessna
210L
Fixed-wing, single engine Kk Hangar LLC
Little Rock, Arkansas
Standard 2018-07-06 ValidFAA registration status code V: Valid registration. All codes
N10KY Cessna
A185E
Fixed-wing, single engine Individual owner
California
Standard 2018-07-03 ValidFAA registration status code V: Valid registration. All codes
N278G Beech
A36
Fixed-wing, single engine Tankersley Aviation LLC
Sylacauga, Alabama
Standard 2018-07-03 ValidFAA registration status code V: Valid registration. All codes
N4633M Beech
F33A
Fixed-wing, single engine J & S Aviation LLC
Clinton, Missouri
Standard 2018-07-03 ValidFAA registration status code V: Valid registration. All codes
N8298H Beech
F33A
Fixed-wing, single engine C & L Leasing LLC
Cody, Wyoming
Standard 2018-07-02 ValidFAA registration status code V: Valid registration. All codes
N8600Z Cessna
P206B
Fixed-wing, single engine Chamberlin Aviation
East Wenatchee, Washington
Standard 2018-06-29 ValidFAA registration status code V: Valid registration. All codes
N2040U Beech
A36
Fixed-wing, single engine Individual owner
Indiana
Standard 2018-06-28 ValidFAA registration status code V: Valid registration. All codes
N1856Z Beech
F33A
Fixed-wing, single engine Individual owner
Kansas
Standard 2018-06-27 ValidFAA registration status code V: Valid registration. All codes
N7096N Beech
V35A
Fixed-wing, single engine Individual owner
Standard 2018-06-27 ValidFAA registration status code V: Valid registration. All codes
N777ZT Cessna
320E
Fixed-wing, multi-engine Individual owner
Texas
Standard 2018-06-27 ValidFAA registration status code V: Valid registration. All codes
N80DH Aero Commander
200D
Fixed-wing, single engine Individual owner
Minnesota
Standard 2018-06-27 ValidFAA registration status code V: Valid registration. All codes
N924RH Beech
A36
Fixed-wing, single engine Individual owner
Indiana
Standard 2018-06-27 ValidFAA registration status code V: Valid registration. All codes
N525BH Beech
V35B
Fixed-wing, single engine Individual owner
Tennessee
Standard 2018-06-26 ValidFAA registration status code V: Valid registration. All codes
N9068Q Beech
V35B
Fixed-wing, single engine Individual owner
Nevada
Standard 2018-06-26 ValidFAA registration status code V: Valid registration. All codes
N922LZ Beech
E-55
Fixed-wing, multi-engine Tmde Calibration Labs INC
Richmond, Maine
Standard 2018-06-26 ValidFAA registration status code V: Valid registration. All codes
N641G Beech
V35B
Fixed-wing, single engine Individual owner
Arizona
Standard 2018-06-21 ValidFAA registration status code V: Valid registration. All codes
N2173L Beech
F33A
Fixed-wing, single engine Individual owner
North Dakota
Standard 2018-06-20 ValidFAA registration status code V: Valid registration. All codes
N2325F Cessna
210E
Fixed-wing, single engine Stephen N Ruark Farm Services INC
Pantego, North Carolina
Standard 2018-06-20 ValidFAA registration status code V: Valid registration. All codes
N2526X Cessna
P206
Fixed-wing, single engine Individual owner
Washington
Standard 2018-06-20 ValidFAA registration status code V: Valid registration. All codes
N6649S Beech
V35B
Fixed-wing, single engine Individual owner
New Mexico
Standard 2018-06-20 ValidFAA registration status code V: Valid registration. All codes
N7843L Beech
V35A
Fixed-wing, single engine Individual owner
Kansas
Standard 2018-06-20 ValidFAA registration status code V: Valid registration. All codes
N58RH Beech
58
Fixed-wing, multi-engine Individual owner
Arkansas
Standard 2018-06-19 ValidFAA registration status code V: Valid registration. All codes
N6434N Cessna
210N
Fixed-wing, single engine Individual owner
Virginia
Standard 2018-06-19 ValidFAA registration status code V: Valid registration. All codes
N84FB Beech
V35B
Fixed-wing, single engine Co-owned owner
Illinois
Standard 2018-06-19 ValidFAA registration status code V: Valid registration. All codes
N6644V Bellanca
17-30A
Fixed-wing, single engine Individual owner
Texas
Standard 2018-06-18 ValidFAA registration status code V: Valid registration. All codes
N9242R Cessna
A188B
Fixed-wing, single engine Air Dakota Flite INC
Hettinger, North Dakota
Restricted 2018-06-18 ValidFAA registration status code V: Valid registration. All codes
N30CM Cessna
A185F
Fixed-wing, single engine Boardman Air Service LLC
Henderson, Nebraska
Standard 2018-06-15 ValidFAA registration status code V: Valid registration. All codes
N2536X Cessna
P206
Fixed-wing, single engine Individual owner
Iowa
Standard 2018-06-14 ValidFAA registration status code V: Valid registration. All codes
N799X Beech
35-C33A
Fixed-wing, single engine Individual owner
Washington
Standard 2018-06-14 ValidFAA registration status code V: Valid registration. All codes
N3862G Cessna
U206B
Fixed-wing, single engine Individual owner
Alaska
Standard 2018-06-12 ValidFAA registration status code V: Valid registration. All codes
N4556M Beech
A36
Fixed-wing, single engine Co-owned owner
Tennessee
Standard 2018-06-12 ValidFAA registration status code V: Valid registration. All codes
N9155Q Beech
F33A
Fixed-wing, single engine Individual owner
West Virginia
Standard 2018-06-12 ValidFAA registration status code V: Valid registration. All codes
N60844 Cessna
A185F
Fixed-wing, single engine Co-owned owner
Nevada
Restricted 2018-06-11 ValidFAA registration status code V: Valid registration. All codes
N6392Z Cessna
U206G
Fixed-wing, single engine Individual owner
New Hampshire
Standard 2018-06-11 ValidFAA registration status code V: Valid registration. All codes
N334D Beech
F33A
Fixed-wing, single engine Co-owned owner
Oklahoma
Standard 2018-06-07 ValidFAA registration status code V: Valid registration. All codes
N35KA Beech
V35B
Fixed-wing, single engine Individual owner
Arkansas
Standard 2018-06-07 ValidFAA registration status code V: Valid registration. All codes
N7925R Beech
V35A
Fixed-wing, single engine Individual owner
Texas
Standard 2018-06-07 ValidFAA registration status code V: Valid registration. All codes
N8000V Cessna
A188
Fixed-wing, single engine Cga Holdings LLC
Kalispell, Montana
Restricted 2018-06-06 ValidFAA registration status code V: Valid registration. All codes
N7922M Beech
V35
Fixed-wing, single engine Destination Aero LLC
Lubbock, Texas
Standard 2018-06-05 ValidFAA registration status code V: Valid registration. All codes
N1566P Beech
F33A
Fixed-wing, single engine Beech Powers LLC
Henderson, Nevada
Standard 2018-06-04 ValidFAA registration status code V: Valid registration. All codes
N38020 Beech
58
Fixed-wing, multi-engine Pardue Hines Aviation LLC
Lincolnton, North Carolina
Standard 2018-06-04 ValidFAA registration status code V: Valid registration. All codes
N532G Beech
A36
Fixed-wing, single engine Msd Sales INC
Cedar Rapids, Iowa
Standard 2018-06-04 ValidFAA registration status code V: Valid registration. All codes
N6559V Bellanca
17-30
Fixed-wing, single engine Dodson International Parts INC
Rantoul, Kansas
Standard 2018-06-04 ValidFAA registration status code V: Valid registration. All codes
N123U Cessna
210H
Fixed-wing, single engine Awg Aviation LLC
Ainsworth, Iowa
Standard 2018-05-31 ValidFAA registration status code V: Valid registration. All codes
N2859W Beech
A36
Fixed-wing, single engine Co-owned owner
California
Standard 2018-05-30 ValidFAA registration status code V: Valid registration. All codes
N899T Beech
V35B
Fixed-wing, single engine Co-owned owner
Missouri
Standard 2018-05-30 ValidFAA registration status code V: Valid registration. All codes
N185JC Cessna
A185F
Fixed-wing, single engine Adirondack Aviation LLC
Walpole, New Hampshire
Standard 2018-05-29 ValidFAA registration status code V: Valid registration. All codes
N28DJ Beech
S35
Fixed-wing, single engine Co-owned owner
Washington
Standard 2018-05-29 ValidFAA registration status code V: Valid registration. All codes
N470AW Beech
V35
Fixed-wing, single engine Co-owned owner
Texas
Standard 2018-05-29 ValidFAA registration status code V: Valid registration. All codes
N6816S Beech
A36
Fixed-wing, single engine Individual owner
Texas
Standard 2018-05-29 ValidFAA registration status code V: Valid registration. All codes
N77QQ Beech
V35B
Fixed-wing, single engine Individual owner
New Mexico
Standard 2018-05-29 ValidFAA registration status code V: Valid registration. All codes
N4657A Beech
58
Fixed-wing, multi-engine Tessos Air Service INC
Wilmington, Delaware
Standard 2018-05-25 ValidFAA registration status code V: Valid registration. All codes
N5110J Cessna
310R
Fixed-wing, multi-engine Co-owned owner
Tennessee
Standard 2018-05-25 ValidFAA registration status code V: Valid registration. All codes
N9372V Mooney
M20E
Fixed-wing, single engine Individual owner
South Carolina
Standard 2018-05-24 ValidFAA registration status code V: Valid registration. All codes
N249A Beech
F33C
Fixed-wing, single engine Sky West Aviation INC Trustee
Albuquerque, New Mexico
Standard 2018-05-22 ValidFAA registration status code V: Valid registration. All codes
N6925R Cessna
T210H
Fixed-wing, single engine Individual owner
Wyoming
Standard 2018-05-22 ValidFAA registration status code V: Valid registration. All codes
N185TH Cessna
A185F
Fixed-wing, single engine Individual owner
Washington
Standard 2018-05-21 ValidFAA registration status code V: Valid registration. All codes
N5676K Beech
S35
Fixed-wing, single engine Individual owner
Washington
Standard 2018-05-21 ValidFAA registration status code V: Valid registration. All codes
N95TY Cessna
310R
Fixed-wing, multi-engine First Light Aviation Services LLC
Middletown, Delaware
Standard 2018-05-21 ValidFAA registration status code V: Valid registration. All codes
N444PJ Cessna
210L
Fixed-wing, single engine Wagner Aviation LLC
Laura, Ohio
Standard 2018-05-17 ValidFAA registration status code V: Valid registration. All codes
N719SG Beech
V35A
Fixed-wing, single engine Individual owner
Texas
Standard 2018-05-17 ValidFAA registration status code V: Valid registration. All codes
N210BN Cessna
210L
Fixed-wing, single engine By Land Air and Sea LLC
Alto, Michigan
Standard 2018-05-16 ValidFAA registration status code V: Valid registration. All codes
N977JL Beech
F33A
Fixed-wing, single engine Co-owned owner
Massachusetts
Standard 2018-05-16 ValidFAA registration status code V: Valid registration. All codes
N6147V Beech
S35
Fixed-wing, single engine Individual owner
California
Special flight permit 2018-05-11 ValidFAA registration status code V: Valid registration. All codes
N92WM Cessna
A185F
Fixed-wing, single engine Individual owner
Colorado
Standard 2018-05-11 ValidFAA registration status code V: Valid registration. All codes
N52LG Beech
F33A
Fixed-wing, single engine Individual owner
South Carolina
Standard 2018-05-10 ValidFAA registration status code V: Valid registration. All codes
N734HB Cessna
A185F
Fixed-wing, single engine Individual owner
Alaska
Multiple 2018-05-10 ValidFAA registration status code V: Valid registration. All codes
N1833F Cessna
210F
Fixed-wing, single engine Hale Jay
Corpus Christi, Texas
Standard 2018-05-09 ValidFAA registration status code V: Valid registration. All codes
N35M Beech
V35B
Fixed-wing, single engine Individual owner
Kansas
Standard 2018-05-09 ValidFAA registration status code V: Valid registration. All codes
N5073R Cessna
A185F
Fixed-wing, single engine Mckenna Brothers Aircraft LLC
Anchorage, Alaska
Standard 2018-05-08 ValidFAA registration status code V: Valid registration. All codes
N30SL Beech
A36
Fixed-wing, single engine Individual owner
Arizona
Standard 2018-05-07 ValidFAA registration status code V: Valid registration. All codes
N1977X Cessna
A185F
Fixed-wing, single engine One Pft LLC
Denton, Montana
Standard 2018-05-04 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.