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
N3CN Beech-Nogle
D-45
Fixed-wing, single engine Check Six LLC
Champaign, Illinois
Experimental 2016-01-20 ValidFAA registration status code V: Valid registration. All codes
N9403Q Beech
58
Fixed-wing, multi-engine Blue Sky Baron LLC
Highlands Ranch, Colorado
Standard 2016-01-20 ValidFAA registration status code V: Valid registration. All codes
N867S Beech
V35A
Fixed-wing, single engine Sixty Seven Sierra LLC
Wilmington, Delaware
Standard 2016-01-19 ValidFAA registration status code V: Valid registration. All codes
N9517E Bellanca
17-30A
Fixed-wing, single engine Individual owner
Oregon
Standard 2016-01-14 ValidFAA registration status code V: Valid registration. All codes
N111RV Beech
95-C55
Fixed-wing, multi-engine Individual owner
Texas
Standard 2016-01-13 ValidFAA registration status code V: Valid registration. All codes
N5021J Cessna
310R
Fixed-wing, multi-engine Integrity Aviation LLC
Coatesville, Indiana
Standard 2016-01-12 ValidFAA registration status code V: Valid registration. All codes
N8217R Bellanca
17-30A
Fixed-wing, single engine Aj Management INC
Spicewood, Texas
Standard 2016-01-08 ValidFAA registration status code V: Valid registration. All codes
N6688V Bellanca
17-30
Fixed-wing, single engine Individual owner
Washington
Standard 2016-01-07 ValidFAA registration status code V: Valid registration. All codes
N7988K Beech
S35
Fixed-wing, single engine Unlimited Horsepower LLC
Lewisburg, West Virginia
Standard 2016-01-07 ValidFAA registration status code V: Valid registration. All codes
N6108E Beech
A36
Fixed-wing, single engine Mid America Sprayers INC
Ulysses, Kansas
Standard 2016-01-06 ValidFAA registration status code V: Valid registration. All codes
N4831M Beech
A36
Fixed-wing, single engine Boty Aero LLC
Madison, Alabama
Standard 2016-01-05 ValidFAA registration status code V: Valid registration. All codes
N2737A Beech
36
Fixed-wing, single engine Knight Farms INC
Pasco, Washington
Standard 2015-12-31 ValidFAA registration status code V: Valid registration. All codes
N442GR Cessna
U206F
Fixed-wing, single engine Ak Air Leasing LLC
Homer, Alaska
Standard 2015-12-30 ValidFAA registration status code V: Valid registration. All codes
N5693K Beech
S35
Fixed-wing, single engine Individual owner
California
Standard 2015-12-28 ValidFAA registration status code V: Valid registration. All codes
N3083G Beech
F33A
Fixed-wing, single engine Holly Grove Flying Service INC
Holly Grove, Arkansas
Standard 2015-12-23 ValidFAA registration status code V: Valid registration. All codes
N18474 Beech
A36
Fixed-wing, single engine Sacandaga Air INC
Fort Plain, New York
Standard 2015-12-22 ValidFAA registration status code V: Valid registration. All codes
N2053W Beech
V35
Fixed-wing, single engine Oem Products INC
Oklahoma City, Oklahoma
Standard 2015-12-19 ValidFAA registration status code V: Valid registration. All codes
N6064E Beech
K35
Fixed-wing, single engine Individual owner
Louisiana
Standard 2015-12-19 ValidFAA registration status code V: Valid registration. All codes
N9164Q Beech
F33A
Fixed-wing, single engine Fletcher Mountain Aviation LLC
Hampden, Maine
Standard 2015-12-19 ValidFAA registration status code V: Valid registration. All codes
N9243R Cessna
A188B
Fixed-wing, single engine C & L Holzwarth INC
Virden, Illinois
Restricted 2015-12-19 ValidFAA registration status code V: Valid registration. All codes
N628YT Cessna
U206G
Fixed-wing, single engine Adventist World Aviation
Wilson, North Carolina
Standard 2015-12-15 ValidFAA registration status code V: Valid registration. All codes
N9149M Cessna
U206E
Fixed-wing, single engine Individual owner
New York
Standard 2015-12-15 ValidFAA registration status code V: Valid registration. All codes
N1829W Beech
A36
Fixed-wing, single engine Right Wing LLC
Newnan, Georgia
Standard 2015-12-12 ValidFAA registration status code V: Valid registration. All codes
N6028E Beech
A36
Fixed-wing, single engine Individual owner
Texas
Standard 2015-12-12 ValidFAA registration status code V: Valid registration. All codes
N1801M Beech
F33A
Fixed-wing, single engine Co-owned owner
Kansas
Standard 2015-12-11 ValidFAA registration status code V: Valid registration. All codes
N22NE Cessna
210L
Fixed-wing, single engine Evmed LLC
Littleton, North Carolina
Standard 2015-12-11 ValidFAA registration status code V: Valid registration. All codes
N109BA Beech
F33A
Fixed-wing, single engine Individual owner
California
Standard 2015-12-10 ValidFAA registration status code V: Valid registration. All codes
N14786 Bellanca
17-30A
Fixed-wing, single engine Withheld at owner's request
Standard 2015-12-09 ValidFAA registration status code V: Valid registration. All codes
N4467A Beech
A36
Fixed-wing, single engine Individual owner
Alabama
Standard 2015-12-09 ValidFAA registration status code V: Valid registration. All codes
N1YC Cessna
310R
Fixed-wing, multi-engine Individual owner
Texas
Standard 2015-12-05 ValidFAA registration status code V: Valid registration. All codes
N4789F Cessna
TP206B
Fixed-wing, single engine Grimes Aero LLC
Hobbs, New Mexico
Standard 2015-12-05 ValidFAA registration status code V: Valid registration. All codes
N6111M Beech
V35
Fixed-wing, single engine Beech Club LLC
Lacrosse, Indiana
Standard 2015-12-05 ValidFAA registration status code V: Valid registration. All codes
N6665Z Beech
V35B
Fixed-wing, single engine Dunkley Music INC
Meridian, Idaho
Standard 2015-12-04 ValidFAA registration status code V: Valid registration. All codes
N8811V Bellanca
17-30A
Fixed-wing, single engine Individual owner
Oregon
Standard 2015-12-04 ValidFAA registration status code V: Valid registration. All codes
N4725F Cessna
TP206B
Fixed-wing, single engine High Peak Air LLC
Vernal, Utah
Standard 2015-12-03 ValidFAA registration status code V: Valid registration. All codes
N5474J Cessna
310R
Fixed-wing, multi-engine Co-owned owner
Nevada
Standard 2015-12-03 ValidFAA registration status code V: Valid registration. All codes
N93272 Cessna
A185F
Fixed-wing, single engine Individual owner
Oregon
Standard 2015-12-03 ValidFAA registration status code V: Valid registration. All codes
N66876 Beech
V35B
Fixed-wing, single engine Individual owner
New Mexico
Standard 2015-12-02 ValidFAA registration status code V: Valid registration. All codes
N18NF Cessna
210G
Fixed-wing, single engine R D Aviation LLC
Phoenixville, Pennsylvania
Standard 2015-12-01 ValidFAA registration status code V: Valid registration. All codes
N2206R Cessna
T210H
Fixed-wing, single engine Kahonees Travel Services LLC
Pleasanton, Texas
Standard 2015-11-25 ValidFAA registration status code V: Valid registration. All codes
N5EA Cessna
U206F
Fixed-wing, single engine 310 LLC
Conover, North Carolina
Standard 2015-11-23 ValidFAA registration status code V: Valid registration. All codes
N60268 Beech
A36
Fixed-wing, single engine Rougher Aviation LLC
Council Hill, Oklahoma
Standard 2015-11-16 ValidFAA registration status code V: Valid registration. All codes
N7300V Bellanca
17-30
Fixed-wing, single engine American Air Sentinel INC
Columbus, Ohio
Standard 2015-11-16 ValidFAA registration status code V: Valid registration. All codes
N76BA Beech
A36
Fixed-wing, single engine Individual owner
Wisconsin
Standard 2015-11-10 ValidFAA registration status code V: Valid registration. All codes
N4477S Beech
A36
Fixed-wing, single engine Maynard J Smith Mobile Homes & Rvs LTD
Okoboji, Iowa
Standard 2015-11-09 ValidFAA registration status code V: Valid registration. All codes
N6110F Cessna
210H
Fixed-wing, single engine Co-owned owner
Florida
Standard 2015-11-09 ValidFAA registration status code V: Valid registration. All codes
N2255N Beech
V35B
Fixed-wing, single engine Individual owner
North Dakota
Standard 2015-11-06 ValidFAA registration status code V: Valid registration. All codes
N1994U Cessna
A185E
Fixed-wing, single engine Individual owner
Alaska
Restricted 2015-11-05 ValidFAA registration status code V: Valid registration. All codes
N4305W Beech
E-55
Fixed-wing, multi-engine Individual owner
Wyoming
Standard 2015-11-05 ValidFAA registration status code V: Valid registration. All codes
N7219U Beech
F33A
Fixed-wing, single engine Individual owner
Tennessee
Standard 2015-11-04 ValidFAA registration status code V: Valid registration. All codes
N812EL Beech
A36
Fixed-wing, single engine Individual owner
Louisiana
Standard 2015-11-03 ValidFAA registration status code V: Valid registration. All codes
N5211K Ryan
NAVION D
Fixed-wing, single engine P-Factor LLC
Titusville, Florida
Standard 2015-11-02 ValidFAA registration status code V: Valid registration. All codes
N70487 Cessna
A185F
Fixed-wing, single engine Co-owned owner
Tennessee
Standard 2015-10-30 ValidFAA registration status code V: Valid registration. All codes
N715JW Beech
95-C55
Fixed-wing, multi-engine Black Forest Applications LLC
Mckinney, Texas
Standard 2015-10-27 ValidFAA registration status code V: Valid registration. All codes
N7046N Beech
V35A
Fixed-wing, single engine Individual owner
Maryland
Standard 2015-10-23 ValidFAA registration status code V: Valid registration. All codes
N81DD Beech
58
Fixed-wing, multi-engine Jdj Transport LLC
Wilmington, Delaware
Standard 2015-10-22 ValidFAA registration status code V: Valid registration. All codes
N466LS Beech
V35B
Fixed-wing, single engine Bluefish LLC
Block Island, Rhode Island
Standard 2015-10-21 ValidFAA registration status code V: Valid registration. All codes
N1020V Cessna
U206F
Fixed-wing, single engine Craig Air INC
Wasilla, Alaska
Standard 2015-10-20 ValidFAA registration status code V: Valid registration. All codes
N221DC Beech
A36
Fixed-wing, single engine Amob1 LLC
Baton Rouge, Louisiana
Standard 2015-10-19 ValidFAA registration status code V: Valid registration. All codes
N2272L Beech
V35B
Fixed-wing, single engine Individual owner
Wyoming
Standard 2015-10-16 ValidFAA registration status code V: Valid registration. All codes
N9910N Cessna
A185F
Fixed-wing, single engine Individual owner
Nebraska
Standard 2015-10-08 ValidFAA registration status code V: Valid registration. All codes
N39TP Beech
E-55
Fixed-wing, multi-engine Individual owner
Tennessee
Standard 2015-10-06 ValidFAA registration status code V: Valid registration. All codes
N732LL Cessna
210M
Fixed-wing, single engine Individual owner
Alabama
Standard 2015-10-05 ValidFAA registration status code V: Valid registration. All codes
N118A Cessna
A185F
Fixed-wing, single engine Co-owned owner
California
Standard 2015-10-02 ValidFAA registration status code V: Valid registration. All codes
N21HZ Beech
E33A
Fixed-wing, single engine Individual owner
Texas
Standard 2015-10-02 ValidFAA registration status code V: Valid registration. All codes
N765P Meyers Industries Inc
200C
Fixed-wing, single engine Individual owner
Texas
Standard 2015-10-02 ValidFAA registration status code V: Valid registration. All codes
N7075N Beech
V35A
Fixed-wing, single engine Sign Zeppelin LLC
Orlando, Florida
Standard 2015-10-01 ValidFAA registration status code V: Valid registration. All codes
N4099S Beech
E-55
Fixed-wing, multi-engine Dodson International Parts INC
Rantoul, Kansas
Standard 2015-09-29 ValidFAA registration status code V: Valid registration. All codes
N40JC Cessna
421B
Fixed-wing, multi-engine Dbs Aviation LLC
Sulphur Springs, Texas
Standard 2015-09-29 ValidFAA registration status code V: Valid registration. All codes
N66913 Beech
A36
Fixed-wing, single engine Mp Air LLC
Stonewall, Louisiana
Standard 2015-09-29 ValidFAA registration status code V: Valid registration. All codes
N640AC Beech
58
Fixed-wing, multi-engine Plane Old LLC
Wildwood, Missouri
Standard 2015-09-28 ValidFAA registration status code V: Valid registration. All codes
N91190 Cessna
207
Fixed-wing, single engine Individual owner
Alaska
Standard 2015-09-28 ValidFAA registration status code V: Valid registration. All codes
N1571U Cessna
U206F
Fixed-wing, single engine Co-owned owner
California
Standard 2015-09-21 ValidFAA registration status code V: Valid registration. All codes
N1313W Beech
A36
Fixed-wing, single engine Second Kitchen LLC
Chicago, Illinois
Standard 2015-09-15 ValidFAA registration status code V: Valid registration. All codes
N87358 Cessna
310R
Fixed-wing, multi-engine Individual owner
North Carolina
Standard 2015-09-15 ValidFAA registration status code V: Valid registration. All codes
N5878J Beech
S35
Fixed-wing, single engine Individual owner
Arizona
Standard 2015-09-11 ValidFAA registration status code V: Valid registration. All codes
N691MS Cessna
207A
Fixed-wing, single engine Sharptime LLC
Bossier City, Louisiana
Standard 2015-09-09 ValidFAA registration status code V: Valid registration. All codes
N39826 Bellanca
17-30A
Fixed-wing, single engine Individual owner
New Hampshire
Standard 2015-09-08 ValidFAA registration status code V: Valid registration. All codes
N22FG Cessna
A185F
Fixed-wing, single engine State of California Department of Fish and Game
Sacramento, California
Multiple 2015-09-04 ValidFAA registration status code V: Valid registration. All codes
N81DR Beech
58
Fixed-wing, multi-engine Commonwealth Aviation Service INC DBA
Richmond, Virginia
Standard 2015-09-03 ValidFAA registration status code V: Valid registration. All codes
N9150M Cessna
U206E
Fixed-wing, single engine Skyler Aviation INC
San Diego, California
Standard 2015-09-03 ValidFAA registration status code V: Valid registration. All codes
N527ML Beech
95-C55
Fixed-wing, multi-engine Co-owned owner
Virginia
Standard 2015-09-02 ValidFAA registration status code V: Valid registration. All codes
N1931Q Cessna
A185F
Fixed-wing, single engine Individual owner
Alaska
Standard 2015-09-01 ValidFAA registration status code V: Valid registration. All codes
N28131 Bellanca
17-30A
Fixed-wing, single engine Individual owner
Texas
Standard 2015-09-01 ValidFAA registration status code V: Valid registration. All codes
N979MA Beech
A36
Fixed-wing, single engine Meisner Aircraft INC
Burlington, Wisconsin
Standard 2015-08-31 ValidFAA registration status code V: Valid registration. All codes
N1932U Cessna
A185E
Fixed-wing, single engine Individual owner
Arizona
Standard 2015-08-27 ValidFAA registration status code V: Valid registration. All codes
N2939A Beech
E33A
Fixed-wing, single engine Rwrb LLC
Conway, Arkansas
Standard 2015-08-27 ValidFAA registration status code V: Valid registration. All codes
N88RM Beech
A45
Fixed-wing, single engine American Airpower Heritage Flying Museum
Dallas, Texas
Standard 2015-08-27 ValidFAA registration status code V: Valid registration. All codes
N614CQ Cessna
310R
Fixed-wing, multi-engine C & H Aviation LLC
Lagrange, Georgia
Standard 2015-08-26 ValidFAA registration status code V: Valid registration. All codes
N2207L Beech
A36
Fixed-wing, single engine Individual owner
California
Standard 2015-08-24 ValidFAA registration status code V: Valid registration. All codes
N2738B Cessna
310R
Fixed-wing, multi-engine Sonrise Aviation LLC
Portland, Indiana
Standard 2015-08-24 ValidFAA registration status code V: Valid registration. All codes
N418RW Beech
58
Fixed-wing, multi-engine Power Aero INC
Scituate, Rhode Island
Standard 2015-08-24 ValidFAA registration status code V: Valid registration. All codes
N748KP Cessna
U206F
Fixed-wing, single engine Kalinin Partners LLC
Juneau, Alaska
Standard 2015-08-21 ValidFAA registration status code V: Valid registration. All codes
N174U Beech
58
Fixed-wing, multi-engine Rocky Mountain Ventures INC
Cheyenne, Wyoming
Standard 2015-08-18 ValidFAA registration status code V: Valid registration. All codes
N1724T Cessna
210D
Fixed-wing, single engine Individual owner
Washington
Standard 2015-08-17 ValidFAA registration status code V: Valid registration. All codes
N8471Q Cessna
U206F
Fixed-wing, single engine Igiugig Lodge LLC
Wasilla, Alaska
Standard 2015-08-17 ValidFAA registration status code V: Valid registration. All codes
N1014W Beech
E-55
Fixed-wing, multi-engine Individual owner
Illinois
Standard 2015-08-14 ValidFAA registration status code V: Valid registration. All codes
N4927A Cessna
310R
Fixed-wing, multi-engine Genx Aviation LLC
Leesburg, Virginia
Standard 2015-08-14 ValidFAA registration status code V: Valid registration. All codes
N2217R Cessna
T210H
Fixed-wing, single engine Co-owned owner
Idaho
Standard 2015-08-13 ValidFAA registration status code V: Valid registration. All codes
N64VT Beech
S35
Fixed-wing, single engine Bonanza Aviation LLC
San Antonio, Texas
Standard 2015-08-12 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.