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
N5730V Beech
V35
Fixed-wing, single engine Individual owner
Tennessee
Standard 2007-12-04 ValidFAA registration status code V: Valid registration. All codes
N4503S Beech
F33A
Fixed-wing, single engine Co-owned owner
Massachusetts
Standard 2007-12-03 ValidFAA registration status code V: Valid registration. All codes
N70200 Cessna
A185E
Fixed-wing, single engine Individual owner
Alaska
Multiple 2007-12-01 ValidFAA registration status code V: Valid registration. All codes
N943B Beech
95-C55
Fixed-wing, multi-engine Individual owner
Texas
Standard 2007-12-01 ValidFAA registration status code V: Valid registration. All codes
N185AS Cessna
A185F
Fixed-wing, single engine Adventure Bound Seaplanes INC
Tower, Minnesota
Standard 2007-11-29 ValidFAA registration status code V: Valid registration. All codes
N7892R Beech
V35A
Fixed-wing, single engine Individual owner
Texas
Standard 2007-11-26 ValidFAA registration status code V: Valid registration. All codes
N59105 Cessna
210L
Fixed-wing, single engine Individual owner
California
Standard 2007-11-15 ValidFAA registration status code V: Valid registration. All codes
N9470M Cessna
210K
Fixed-wing, single engine Individual owner
Oklahoma
Standard 2007-11-09 ValidFAA registration status code V: Valid registration. All codes
N7883R Beech
36
Fixed-wing, single engine Individual owner
Missouri
Standard 2007-11-02 ValidFAA registration status code V: Valid registration. All codes
N36DT Beech
A36
Fixed-wing, single engine Individual owner
California
Standard 2007-11-01 ValidFAA registration status code V: Valid registration. All codes
N185LM Cessna
A185F
Fixed-wing, single engine Co-owned owner
Alaska
Standard 2007-10-31 ValidFAA registration status code V: Valid registration. All codes
N5850F Cessna
210G
Fixed-wing, single engine 5850F LLC
Monroe Township, New Jersey
Standard 2007-10-31 ValidFAA registration status code V: Valid registration. All codes
N6050S Schoenfeld Simon Leon
WHEELER EXPRESS
Fixed-wing, single engine Kittleson Allen F
Granbury, Texas
Experimental 2007-10-31 ValidFAA registration status code V: Valid registration. All codes
N35837 Cessna
U206F
Fixed-wing, single engine Individual owner
Illinois
Standard 2007-10-29 ValidFAA registration status code V: Valid registration. All codes
N3477A Beech
36
Fixed-wing, single engine Individual owner
Arizona
Standard 2007-10-25 ValidFAA registration status code V: Valid registration. All codes
N8636A Beech
A36
Fixed-wing, single engine 36A LTD
Cincinnati, Ohio
Standard 2007-10-23 ValidFAA registration status code V: Valid registration. All codes
N6852R Cessna
T210G
Fixed-wing, single engine Individual owner
Idaho
Standard 2007-10-17 ValidFAA registration status code V: Valid registration. All codes
N8137G Cessna
210K
Fixed-wing, single engine Two Ten K LLC
Upper Sandusky, Ohio
Standard 2007-10-12 ValidFAA registration status code V: Valid registration. All codes
N30LP Cessna
310R
Fixed-wing, multi-engine Dialysis Clinic INC
Nashville, Tennessee
Standard 2007-10-10 ValidFAA registration status code V: Valid registration. All codes
N2047P Beech
A36
Fixed-wing, single engine Co-owned owner
Pennsylvania
Standard 2007-10-09 ValidFAA registration status code V: Valid registration. All codes
N735EA Cessna
A185F
Fixed-wing, single engine Civil Air Patrol
Maxwell Afb, Alabama
Standard 2007-10-09 ValidFAA registration status code V: Valid registration. All codes
N6328E Cessna
A185F
Fixed-wing, single engine Flies & Floats LLC
Baton Rouge, Louisiana
Standard 2007-10-05 ValidFAA registration status code V: Valid registration. All codes
N711SL Beech
F33A
Fixed-wing, single engine ABC Leasing INC
Oakdale, Louisiana
Standard 2007-10-05 ValidFAA registration status code V: Valid registration. All codes
N8064U Beech
F33A
Fixed-wing, single engine Commercial Flight Services INC
West Chester, Pennsylvania
Standard 2007-10-03 ValidFAA registration status code V: Valid registration. All codes
N358S Beech
V35A
Fixed-wing, single engine Co-owned owner
California
Standard 2007-10-02 ValidFAA registration status code V: Valid registration. All codes
N60264 Beech
V35B
Fixed-wing, single engine Individual owner
Florida
Standard 2007-09-27 ValidFAA registration status code V: Valid registration. All codes
N6647R Beech
A36
Fixed-wing, single engine Bradamike LLC
Fostoria, Ohio
Standard 2007-09-27 ValidFAA registration status code V: Valid registration. All codes
N1078F Cessna
A185F
Fixed-wing, single engine Co-owned owner
Alaska
Standard 2007-09-26 ValidFAA registration status code V: Valid registration. All codes
N185FW Cessna
A185F
Fixed-wing, single engine Northeast Skywagon LLC
Pittsfield, Maine
Standard 2007-09-21 ValidFAA registration status code V: Valid registration. All codes
N1794X Cessna
210L
Fixed-wing, single engine Gulf Atlantic Airways INC
Gainesville, Florida
Standard 2007-09-20 ValidFAA registration status code V: Valid registration. All codes
N36855 Beech
A36TC
Fixed-wing, single engine Aerial Digital Images LLC
Huntington Beach, California
Multiple 2007-09-20 ValidFAA registration status code V: Valid registration. All codes
N6688J Beech
V35B
Fixed-wing, single engine Individual owner
Texas
Standard 2007-09-19 ValidFAA registration status code V: Valid registration. All codes
N531U Beech
95-C55
Fixed-wing, multi-engine Arizona Air Transport LLC
Mesa, Arizona
Standard 2007-09-15 ValidFAA registration status code V: Valid registration. All codes
N10EE Beech
V35B
Fixed-wing, single engine Co-owned owner
Pennsylvania
Standard 2007-09-12 ValidFAA registration status code V: Valid registration. All codes
N4103S Beech
E-55
Fixed-wing, multi-engine Sky High Aviation LLC
Fishers, Indiana
Standard 2007-09-12 ValidFAA registration status code V: Valid registration. All codes
N374T Beech
V35
Fixed-wing, single engine Co-owned owner
Texas
Standard 2007-09-11 ValidFAA registration status code V: Valid registration. All codes
N34383 Meyers Industries Inc
200B
Fixed-wing, single engine Crestair Air LLC
Dover, Delaware
Standard 2007-09-05 ValidFAA registration status code V: Valid registration. All codes
N9587Q Beech
V35
Fixed-wing, single engine Cherokee Flyers Lc
Ellsworth, Iowa
Standard 2007-08-30 ValidFAA registration status code V: Valid registration. All codes
N21218 Cessna
A185F
Fixed-wing, single engine Individual owner
Alaska
Standard 2007-08-27 ValidFAA registration status code V: Valid registration. All codes
N9510J Cessna
A188B
Fixed-wing, single engine Orange County Mosquito Control District
Orange, Texas
Restricted 2007-08-22 ValidFAA registration status code V: Valid registration. All codes
N91157 Cessna
207
Fixed-wing, single engine Garza Aircraft INC
Harlingen, Texas
Standard 2007-08-14 ValidFAA registration status code V: Valid registration. All codes
N8799Z Cessna
P206D
Fixed-wing, single engine Co-owned owner
Alaska
Standard 2007-08-10 ValidFAA registration status code V: Valid registration. All codes
N909AA Cessna
401
Fixed-wing, multi-engine Kings Wings INC
Jupiter, Florida
Standard 2007-08-08 ValidFAA registration status code V: Valid registration. All codes
N1812R Cessna
A185F
Fixed-wing, single engine Individual owner
Alaska
Standard 2007-08-07 ValidFAA registration status code V: Valid registration. All codes
N13ZZ Beech
A36
Fixed-wing, single engine Tigerair of Alabama INC
Newark, Delaware
Standard 2007-07-31 ValidFAA registration status code V: Valid registration. All codes
N210SW Cessna
210L
Fixed-wing, single engine Sierra Whiskey Aircraft LLC
Saint Louis, Missouri
Standard 2007-07-30 ValidFAA registration status code V: Valid registration. All codes
N601 Cessna
A185E
Fixed-wing, single engine Mont Belvieu Materials INC
Mont Belvieu, Texas
Standard 2007-07-23 ValidFAA registration status code V: Valid registration. All codes
N827DG Cessna
U206G
Fixed-wing, single engine Africa Inland Mission International INC
Peachtree City, Georgia
Standard 2007-07-19 ValidFAA registration status code V: Valid registration. All codes
N6166N Cessna
A185F
Fixed-wing, single engine Brian C Haggerty LLC
Pembroke Pines, Florida
Standard 2007-07-17 ValidFAA registration status code V: Valid registration. All codes
N756KC Cessna
U206G
Fixed-wing, single engine Scaletta Enterprises LLC
Middleton, Wisconsin
Standard 2007-07-10 ValidFAA registration status code V: Valid registration. All codes
N6810Q Beech
S35
Fixed-wing, single engine Co-owned owner
Tennessee
Standard 2007-07-09 ValidFAA registration status code V: Valid registration. All codes
N241NP Beech
D55
Fixed-wing, multi-engine Nauti Plane LLC
Wilton Manors, Florida
Standard 2007-07-03 ValidFAA registration status code V: Valid registration. All codes
N729T Beech
S35
Fixed-wing, single engine Individual owner
Texas
Standard 2007-06-29 ValidFAA registration status code V: Valid registration. All codes
N523TC Beech
S35
Fixed-wing, single engine Smith Ranch Bonanza LLC
San Francisco, California
Standard 2007-06-28 ValidFAA registration status code V: Valid registration. All codes
N6687V Bellanca
17-30
Fixed-wing, single engine Co-owned owner
Wisconsin
Standard 2007-06-26 ValidFAA registration status code V: Valid registration. All codes
N2872K Cessna
180K
Fixed-wing, single engine R N Geraci LLC
Lutz, Florida
Special flight permit 2007-06-25 ValidFAA registration status code V: Valid registration. All codes
N98980 Cessna
310R
Fixed-wing, multi-engine Hyder Plumbing CO INC
Tryon, North Carolina
Standard 2007-06-22 ValidFAA registration status code V: Valid registration. All codes
N83RG Beech
F33A
Fixed-wing, single engine Co-owned owner
Texas
Standard 2007-06-19 ValidFAA registration status code V: Valid registration. All codes
N114PG Bellanca
17-30A
Fixed-wing, single engine Regional Medical
Stephentown, New York
Standard 2007-06-15 ValidFAA registration status code V: Valid registration. All codes
N72GP Beech
36
Fixed-wing, single engine Individual owner
Wisconsin
Standard 2007-06-13 ValidFAA registration status code V: Valid registration. All codes
N94211 Cessna
210L
Fixed-wing, single engine Jskp Enterprises LLC
Dover, Delaware
Standard 2007-06-13 ValidFAA registration status code V: Valid registration. All codes
N398T Beech
A36
Fixed-wing, single engine Individual owner
Minnesota
Standard 2007-06-07 ValidFAA registration status code V: Valid registration. All codes
N3957A Beech
V35B
Fixed-wing, single engine Individual owner
Kansas
Standard 2007-05-23 ValidFAA registration status code V: Valid registration. All codes
N988MV Cessna
T210G
Fixed-wing, single engine Co-owned owner
California
Standard 2007-05-19 ValidFAA registration status code V: Valid registration. All codes
N80359 Cessna
A185F
Fixed-wing, single engine Individual owner
Alaska
Standard 2007-05-17 ValidFAA registration status code V: Valid registration. All codes
N8198T Beech
F33A
Fixed-wing, single engine Building Swell LLC
New York, New York
Standard 2007-05-17 ValidFAA registration status code V: Valid registration. All codes
N8666V Beech
S35
Fixed-wing, single engine Individual owner
Virginia
Standard 2007-05-15 ValidFAA registration status code V: Valid registration. All codes
N1803L Beech
V35B
Fixed-wing, single engine Individual owner
Arizona
Standard 2007-05-09 ValidFAA registration status code V: Valid registration. All codes
N5108T Cessna
A185F
Fixed-wing, single engine Individual owner
Pennsylvania
Standard 2007-05-09 ValidFAA registration status code V: Valid registration. All codes
N6284V Beech
V35A
Fixed-wing, single engine Co-owned owner
Missouri
Standard 2007-05-09 ValidFAA registration status code V: Valid registration. All codes
N599DS Beech
E33A
Fixed-wing, single engine Individual owner
California
Standard 2007-05-05 ValidFAA registration status code V: Valid registration. All codes
N8449N Beech
V35A
Fixed-wing, single engine Nms Air LLC
Kalamazoo, Michigan
Standard 2007-05-05 ValidFAA registration status code V: Valid registration. All codes
N4192S Beech
V35B
Fixed-wing, single engine Stecklein Aviation LLC
Colleyville, Texas
Standard 2007-05-04 ValidFAA registration status code V: Valid registration. All codes
N9405S Beech
V35
Fixed-wing, single engine Individual owner
Nevada
Standard 2007-05-02 ValidFAA registration status code V: Valid registration. All codes
N728FR Cessna
310R
Fixed-wing, multi-engine Royal Air Freight INC
Waterford, Michigan
Standard 2007-04-30 ValidFAA registration status code V: Valid registration. All codes
N3374L Cessna
A185E
Fixed-wing, single engine Individual owner
Arizona
Standard 2007-04-27 ValidFAA registration status code V: Valid registration. All codes
N73MK Beech
95-C55
Fixed-wing, multi-engine Individual owner
New Jersey
Standard 2007-04-23 ValidFAA registration status code V: Valid registration. All codes
N4999T Cessna
A185F
Fixed-wing, single engine Andy Aviation INC
Live Oak, Florida
Standard 2007-04-20 ValidFAA registration status code V: Valid registration. All codes
N5DJ Cessna
210L
Fixed-wing, single engine Individual owner
Kentucky
Standard 2007-04-20 ValidFAA registration status code V: Valid registration. All codes
N9042W Beech
A36
Fixed-wing, single engine 42W LLC
Jackson, Missouri
Standard 2007-04-18 ValidFAA registration status code V: Valid registration. All codes
N9137Q Beech
V35B
Fixed-wing, single engine Sam Tyson Builders INC
Monroe, North Carolina
Standard 2007-04-18 ValidFAA registration status code V: Valid registration. All codes
N64DW Beech
58
Fixed-wing, multi-engine Navation LLC
Lauderhill, Florida
Standard 2007-04-16 ValidFAA registration status code V: Valid registration. All codes
N89ZM Beech
F33A
Fixed-wing, single engine Dx Aviation LLC
Broken Arrow, Oklahoma
Standard 2007-04-10 ValidFAA registration status code V: Valid registration. All codes
N8667Q Beech
S35
Fixed-wing, single engine Individual owner
Illinois
Standard 2007-04-09 ValidFAA registration status code V: Valid registration. All codes
N1876W Beech
F33A
Fixed-wing, single engine Headsets Incorporated
Amarillo, Texas
Standard 2007-04-03 ValidFAA registration status code V: Valid registration. All codes
N2472Y Beech
A36
Fixed-wing, single engine Individual owner
California
Standard 2007-04-03 ValidFAA registration status code V: Valid registration. All codes
N2UG Beech
F33A
Fixed-wing, single engine Individual owner
South Carolina
Standard 2007-04-03 ValidFAA registration status code V: Valid registration. All codes
N1673W Beech
58
Fixed-wing, multi-engine Oci LTD
Brunswick, Georgia
Standard 2007-04-02 ValidFAA registration status code V: Valid registration. All codes
N4813M Beech
A36
Fixed-wing, single engine Individual owner
Louisiana
Standard 2007-03-30 ValidFAA registration status code V: Valid registration. All codes
N94MQ Beech
E-55
Fixed-wing, multi-engine Breshan Enterprises LLC
Chicago, Illinois
Standard 2007-03-28 ValidFAA registration status code V: Valid registration. All codes
N207PA Cessna
T207
Fixed-wing, single engine Co-owned owner
Ohio
Standard 2007-03-21 ValidFAA registration status code V: Valid registration. All codes
N66HB Beech
A36
Fixed-wing, single engine Sawtooth Travel Solutions LLC
Twin Falls, Idaho
Standard 2007-03-16 ValidFAA registration status code V: Valid registration. All codes
N136AF Beech
A36
Fixed-wing, single engine Individual owner
Massachusetts
Standard 2007-03-15 ValidFAA registration status code V: Valid registration. All codes
N75AT Beech
A36
Fixed-wing, single engine Gta Air INC
Addison, Texas
Standard 2007-03-07 ValidFAA registration status code V: Valid registration. All codes
N958DM Beech
F33A
Fixed-wing, single engine Dw Moyer Aviation INC
Stroudsburg, Pennsylvania
Standard 2007-03-07 ValidFAA registration status code V: Valid registration. All codes
N5387H Cessna
A185F
Fixed-wing, single engine Stene Aviation INC
Polson, Montana
Standard 2007-03-02 ValidFAA registration status code V: Valid registration. All codes
N89JS Beech
V35
Fixed-wing, single engine Ph Flight Services LLC
Wilmington, Delaware
Standard 2007-03-01 ValidFAA registration status code V: Valid registration. All codes
N135MG Grumman
G-44
Fixed-wing, multi-engine Old Crow LLC
Columbus, Ohio
Standard 2007-02-27 ValidFAA registration status code V: Valid registration. All codes
N211S Cessna
U206G
Fixed-wing, single engine Sherrifs Office Kane County Utah
Kanab, Utah
Standard 2007-02-27 ValidFAA registration status code V: Valid registration. All codes
N5211J Cessna
310R
Fixed-wing, multi-engine Tdm Aviation LLC
Huntsville, Alabama
Standard 2007-02-15 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 8, 2026. Horsepower and thrust are the FAA's figures for the series, not for a particular aircraft.