Engines · piston (reciprocating) · data as of October 5, 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.

Fitted to model families

Beechcraft V35 Bonanza1,496Beechcraft A36 Bonanza1,145Cessna A185 Skywagon1,143Beechcraft F33 Bonanza872Cessna 210 Centurion767Cessna U206 Stationair641Beechcraft 58 Baron466Bellanca 17 Viking456Beechcraft S35 Bonanza439Cessna 310303Cessna A188230Beechcraft E-55193

Beechcraft V35 Bonanza · Beechcraft A36 Bonanza · Cessna A185 Skywagon · Beechcraft F33 Bonanza · Cessna 210 Centurion · Cessna U206 Stationair · Beechcraft 58 Baron · Bellanca 17 Viking · Beechcraft S35 Bonanza · Cessna 310

Where they are owner's state

Texas1,046California792Alaska673Florida566Delaware326Arizona312Montana276Washington274Colorado265Georgia250

Kind of aircraft

Piston singles7,845 (83%)Piston twins1,371 (14%)Turboprops268 (3%)

When the aircraft were built by decade

Connections how this engine series links to the rest of the register

Fitted to

Beechcraft V35 Bonanza 1,496 with this engine series
Beechcraft A36 Bonanza 1,145 with this engine series
Cessna A185 Skywagon 1,143 with this engine series
Beechcraft F33 Bonanza 872 with this engine series
Cessna 210 Centurion 767 with this engine series
Cessna U206 Stationair 641 with this engine series
Beechcraft 58 Baron 466 with this engine series
Bellanca 17 Viking 456 with this engine series

Where they are

Texas 1,046 of these aircraft
California 792 of these aircraft
Alaska 673 of these aircraft
Florida 566 of these aircraft
Delaware 326 of these aircraft

Biggest operators

Bas Part Sales LLC 27 of these aircraft
Southern Aircraft Consultancy INC Trustee 12 of these aircraft
Gta Air INC 12 of these aircraft
International Air Services INC Trustee 11 of these aircraft
United States Department Of Interior 10 of these aircraft

Analytics

These connections as data: /graph/engine/continental-io-520-series.json · about the eFlight graph.

Aircraft newest certificates first · 9,484

Tail no.	Maker and model	Group	Owner and base	Certificate	Registered	Status
N732DL	Cessna 210L	Fixed-wing, single engine	N732Dl LLC Driftwood, Texas	Standard	2026-08-18	Valid
N994WY	Beech E-55	Fixed-wing, multi-engine	International Air Services INC Trustee Carson City, Nevada	Standard	2026-08-18	Valid
N8612Q	Beech S35	Fixed-wing, single engine	Individual owner California	Standard	2026-08-16	Valid
N33HT	Beech S35	Fixed-wing, single engine	Groove LLC Afton, Virginia	Standard	2026-08-15	Valid
N57GG	Beech A36	Fixed-wing, single engine	Co-owned owner Texas	Standard	2026-08-15	Valid
N9498M	Cessna 210K	Fixed-wing, single engine	Co-owned owner California	Standard	2026-08-15	Valid
N3746Y	Cessna 210D	Fixed-wing, single engine	Individual owner Georgia	Standard	2026-08-14	Valid
N3774Y	Cessna 210D	Fixed-wing, single engine	Lanning 2 Aviation LLC Amarillo, Texas	Standard	2026-08-14	Valid
N7521R	Beech S35	Fixed-wing, single engine	Watchill LLC Traverse City, Michigan	Standard	2026-08-13	Valid
N128AE	Beech A36	Fixed-wing, single engine	Chiave Solutions LLC Orlando, Florida	Standard	2026-08-12	Valid
N1820R	Cessna A185F	Fixed-wing, single engine	Individual owner Texas	Restricted	2026-08-12	Valid
N51FD	Beech 58	Fixed-wing, multi-engine	H2F2 LLC Prairie Village, Kansas	Standard	2026-08-12	Valid
N8812M	Beech S35	Fixed-wing, single engine	Tri-County AG Service INC Ipswich, South Dakota	Standard	2026-08-12	Valid
N7839R	Beech D55	Fixed-wing, multi-engine	Muddy Wolf Holdings LLC Wilmington, Delaware	Standard	2026-08-10	Valid
N9253Q	Beech V35B	Fixed-wing, single engine	N9253Q LLC Goldsby, Oklahoma	Standard	2026-08-08	Valid
N54DG	Beech A36	Fixed-wing, single engine	Saffron Aviation LLC Carrollton, Georgia	Standard	2026-08-07	Valid
N22TN	Beech V35	Fixed-wing, single engine	Individual owner Texas	Standard	2026-08-05	Valid
N491B	Beech E-55	Fixed-wing, multi-engine	Airside Kc LLC Riverside, Missouri	Standard	2026-08-05	Valid
N58CH	Beech 58	Fixed-wing, multi-engine	Individual owner Kansas	Standard	2026-08-05	Valid
N93537	Bellanca 17-30A	Fixed-wing, single engine	Individual owner Texas	Standard	2026-08-05	Valid
N9944R	Cessna U206G	Fixed-wing, single engine	Central Virginia Aviation INC North Dinwiddie, Virginia	Standard	2026-08-05	Valid
N3561Q	Cessna A188	Fixed-wing, single engine	Individual owner Texas	Multiple	2026-08-04	Valid
N9745E	Bellanca 17-30A	Fixed-wing, single engine	Individual owner Arizona	Standard	2026-08-04	Valid
N550LM	Beech F33A	Fixed-wing, single engine	Adventure Day Aviation LLC Greensboro, North Carolina	Standard	2026-08-01	Valid
N2048V	Beech A36	Fixed-wing, single engine	5L Aviation LLC Decatur, Texas	Standard	2026-07-31	Valid
N2900T	Aero Commander 200D	Fixed-wing, single engine	Ewing Richard JR Antelope, California	Standard	2026-07-31	Valid
N4598M	Beech V35B	Fixed-wing, single engine		Standard	2026-07-31	Valid
N9380R	Cessna A188B	Fixed-wing, single engine	Farm Air INC Astoria, Illinois	Restricted	2026-07-31	Valid
N7280R	Beech 58	Fixed-wing, multi-engine	Minus 7 INC Durango, Colorado	Standard	2026-07-30	Valid
N735JT	Cessna U206G	Fixed-wing, single engine	Stationair 6 LLC Corinth, Mississippi	Standard	2026-07-30	Valid
N86PR	Cessna A185F	Fixed-wing, single engine	Individual owner Alaska	Standard	2026-07-30	Valid
N25QY	Beech F33A	Fixed-wing, single engine	Individual owner North Carolina	Standard	2026-07-29	Valid
N49JL	Beech A36	Fixed-wing, single engine	Palmetto Aviation Solutions LLC Woodruff, South Carolina	Standard	2026-07-29	Valid
N8336N	Beech V35A	Fixed-wing, single engine	Individual owner Iowa	Standard	2026-07-29	Valid
N8809V	Bellanca 17-30A	Fixed-wing, single engine	Blue Rocket LLC Kalispell, Montana	Standard	2026-07-29	Valid
N4849Q	Cessna A188B	Fixed-wing, single engine	Souther Field Aviation INC Americus, Georgia	Restricted	2026-07-28	Valid
N8142W	Beech F33A	Fixed-wing, single engine	Byrne Real Estate Group LLC Charlotte, North Carolina	Standard	2026-07-28	Valid
N994RJ	Cessna A185F	Fixed-wing, single engine	Airline Pilot Careers LLC Champlin, Minnesota	Standard	2026-07-28	Valid
N4010A	Beech V35B	Fixed-wing, single engine	Withheld at owner's request	Standard	2026-07-27	Valid
N8861V	Bellanca 17-30A	Fixed-wing, single engine	Individual owner California	Standard	2026-07-27	Valid
N185A	Beech 58	Fixed-wing, multi-engine	Co-owned owner Wisconsin	Standard	2026-07-25	Valid
N3463Y	Cessna A185F	Fixed-wing, single engine	Individual owner Alaska	Multiple	2026-07-23	Valid
N28JE	Cessna A185F	Fixed-wing, single engine	Individual owner Alaska	Standard	2026-07-22	Valid
N731TQ	Cessna A188B	Fixed-wing, single engine	Individual owner Montana	Restricted	2026-07-22	Valid
N8733	Beech F33A	Fixed-wing, single engine	Individual owner Washington	Standard	2026-07-22	Valid
N6100F	Cessna 210H	Fixed-wing, single engine	Tri Rotor Spray & Chemical Ulysses, Kansas	Standard	2026-07-21	Valid
N6116C	Cessna 310R	Fixed-wing, multi-engine	Waukegan Flyers LLC Waukegan, Illinois	Standard	2026-07-21	Valid
N29000	Cessna U206C	Fixed-wing, single engine	Co-owned owner Arizona	Standard	2026-07-20	Valid
N4054B	Bellanca 17-30A	Fixed-wing, single engine	Individual owner Oklahoma	Standard	2026-07-20	Valid
N65SB	Beech S35	Fixed-wing, single engine	Jarrett Airspray INC Jamestown, North Dakota	Standard	2026-07-20	Valid
N3120M	Beech F33A	Fixed-wing, single engine	Cowtown Aviation LLC Aledo, Texas	Standard	2026-07-17	Valid
N1841W	Beech F33A	Fixed-wing, single engine	N1841W LLC Plant City, Florida	Standard	2026-07-16	Valid
N35962	Cessna U206F	Fixed-wing, single engine	Barker Aviation LLC Spearfish, South Dakota	Restricted	2026-07-16	Valid
N2431Y	Cessna A185F	Fixed-wing, single engine	Individual owner Texas	Standard	2026-07-15	Valid
N3825X	Beech 58	Fixed-wing, multi-engine	Bliss Aviation LLC Somerville, Tennessee	Standard	2026-07-15	Valid
N5538X	Beech F33A	Fixed-wing, single engine	Beartooth Air LLC Cody, Wyoming	Standard	2026-07-15	Valid
N800CX	Beech A36	Fixed-wing, single engine	Individual owner South Carolina	Standard	2026-07-15	Valid
N944RM	Beech V35	Fixed-wing, single engine	Co-owned owner Texas	Standard	2026-07-15	Valid
N24BK	Beech A36	Fixed-wing, single engine	N24Bk LLC Jupiter, Florida	Standard	2026-07-14	Valid
N39JB	Beech F33A	Fixed-wing, single engine	Co-owned owner Texas	Standard	2026-07-14	Valid
N4886U	Cessna U206G	Fixed-wing, single engine	Skycase Leasing LLC Wasilla, Alaska	Standard	2026-07-13	Valid
N76SC	Cessna A185F	Fixed-wing, single engine	Beaver Creek Adventures LLC Bangor, Maine	Standard	2026-07-13	Valid
N6231A	Beech A36	Fixed-wing, single engine	Individual owner Nebraska	Standard	2026-07-12	Valid
N613MW	Beech A36	Fixed-wing, single engine	Chip Aviation LLC Sarasota, Florida	Standard	2026-07-07	Valid
N9814G	Cessna U206G	Fixed-wing, single engine	Co-owned owner Washington	Standard	2026-07-07	Valid
N7181N	Beech E33A	Fixed-wing, single engine	Individual owner Tennessee	Standard	2026-07-06	Valid
N187MM	Cessna 210E	Fixed-wing, single engine	Self Aviation LLC Hayden, Idaho	Standard	2026-07-04	Valid
N2561X	Cessna P206	Fixed-wing, single engine	N343Ga Leasing LLC Anchorage, Alaska	Standard	2026-07-04	Valid
N3048W	Beech A36	Fixed-wing, single engine	Earthbound Aviation Group LLC Wilmington, Delaware	Standard	2026-07-03	Valid
N2667B	Bellanca 17-30A	Fixed-wing, single engine	Bellanca Flyer INC Winter Garden, Florida	Standard	2026-07-02	Valid
N30593	Cessna 210L	Fixed-wing, single engine	Valiair Lc Trustee Casper, Wyoming	Standard	2026-07-02	Valid
N3814Y	Cessna 210D	Fixed-wing, single engine	Individual owner Texas	Standard	2026-07-02	Valid
N6105F	Cessna 210H	Fixed-wing, single engine	Individual owner California	Standard	2026-07-02	Valid
N2033Z	Beech F33A	Fixed-wing, single engine	Individual owner Washington	Standard	2026-07-01	Valid
N229Q	Beech V35	Fixed-wing, single engine	Mike Lima Partners LLC Wilmington, Delaware	Standard	2026-07-01	Valid
N4169S	Beech F33A	Fixed-wing, single engine	Hp Aero Vantage LLC Sand Springs, Oklahoma	Standard	2026-07-01	Valid
N5902S	Beech V35	Fixed-wing, single engine	Individual owner Minnesota	Standard	2026-07-01	Valid
N5984F	Cessna 210H	Fixed-wing, single engine	Fct Aviation LLC Portales, New Mexico	Standard	2026-07-01	Valid
N4466W	Beech E-55	Fixed-wing, multi-engine	Peregrine Howard Fund V Owner LLC New Orleans, Louisiana	Standard	2026-06-30	Valid
N4597S	Beech A36	Fixed-wing, single engine	Topflight Air LLC Dunkirk, Indiana	Standard	2026-06-30	Valid
N4868A	Cessna 310R	Fixed-wing, multi-engine	Individual owner Wisconsin	Standard	2026-06-30	Valid
N6621S	Beech V35B	Fixed-wing, single engine	Individual owner Georgia	Standard	2026-06-30	Valid
N721LT	Beech 58	Fixed-wing, multi-engine	White River Holdings LLC Southaven, Mississippi	Standard	2026-06-30	Valid
N38650	Beech A36	Fixed-wing, single engine	Individual owner Georgia	Standard	2026-06-29	Valid
N6125J	Beech A36	Fixed-wing, single engine	Bo LLC Birmingham, Alabama	Standard	2026-06-28	Valid
N6135E	Cessna A185F	Fixed-wing, single engine	Ace Aviation LLC Mankato, Minnesota	Standard	2026-06-28	Valid
N143SW	Cessna 310R	Fixed-wing, multi-engine	Bb&D Airways LLC N Redngtn Bch, Florida	Standard	2026-06-27	Valid
N3139W	Beech A36	Fixed-wing, single engine	Grace Air LLC Kalispell, Montana	Standard	2026-06-27	Valid
N5615K	Beech S35	Fixed-wing, single engine	Dennmark Air LLC Dighton, Kansas	Standard	2026-06-27	Valid
N6046N	Cessna A185F	Fixed-wing, single engine	Co-owned owner Illinois	Standard	2026-06-27	Valid
N122RW	Wise Ralph GT400	Fixed-wing, single engine	Individual owner California	Experimental	2026-06-25	Valid
N92FF	Beech 58	Fixed-wing, multi-engine	Aircraft 2 Go ! INC Wilmington, Delaware	Standard	2026-06-25	Valid
N165DB	Cessna A185F	Fixed-wing, single engine	Cloud 916 LLC Dover, Delaware	Standard	2026-06-24	Valid
N1790R	Cessna A185F	Fixed-wing, single engine	Black Dog Holding INC Pleasant Valley, New York	Standard	2026-06-24	Valid
N1EV	Beech A36	Fixed-wing, single engine	Gainesville Aircraft Sales INC Gainesville, Florida	Standard	2026-06-24	Valid
N66812	Beech A36	Fixed-wing, single engine	Dehaan Aviation LLC Bethel, Alaska	Standard	2026-06-24	Valid
N17520	Beech A36	Fixed-wing, single engine	Individual owner Texas	Standard	2026-06-23	Valid
N2110S	Cessna 210L	Fixed-wing, single engine	2F Trade LLC Gainesville, Texas	Standard	2026-06-22	Valid
N4092T	Beech A36	Fixed-wing, single engine	Ennyx LLC Clermont, Florida	Standard	2026-06-22	Valid
N9478S	Beech V35	Fixed-wing, single engine	Rocket Pjr LLC Helena, Montana	Standard	2026-06-21	Valid

Source: FAA Civil Aviation Registry, Releasable Aircraft Database (the engine reference table and each aircraft's engine code), October 5, 2026. Horsepower and thrust are the FAA's figures for the series, not for a particular aircraft.