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
N34LW	Beech T-34B	Fixed-wing, single engine	Anderson Glenn L Sandia Park, New Mexico	Standard	2026-10-05	Valid
N121RW	Beech F33A	Fixed-wing, single engine	Arbuckle Air LLC Kansas City, Missouri	Standard	2026-10-02	Valid
N1550D	Beech F33A	Fixed-wing, single engine	Alexander Air Consulting LLC Lees Summit, Missouri	Standard	2026-10-02	Valid
N17509	Beech A36	Fixed-wing, single engine	Co-owned owner Florida	Standard	2026-10-02	Valid
N714QK	Cessna A185F	Fixed-wing, single engine	Individual owner Texas	Restricted	2026-10-02	Valid
N206SP	Cessna P206	Fixed-wing, single engine	Individual owner Alaska	Standard	2026-10-01	Valid
N606PB	Cessna A185F	Fixed-wing, single engine	Individual owner Washington	Standard	2026-10-01	Valid
N2787T	Beech 95-C55	Fixed-wing, multi-engine	Bombero Aviation LLC Childress, Texas	Standard	2026-09-30	Valid
N400K	Cessna A185F	Fixed-wing, single engine	Clydesdale Asset Management LLC Park City, Utah	Standard	2026-09-30	Valid
N400V	Beech V35B	Fixed-wing, single engine	Individual owner Texas	Standard	2026-09-30	Valid
N4366W	Beech V35B	Fixed-wing, single engine	Co-owned owner Oregon	Standard	2026-09-30	Valid
N7922K	Beech S35	Fixed-wing, single engine	Individual owner Oregon	Standard	2026-09-30	Valid
N92RW	Beech F33A	Fixed-wing, single engine	International Air Services INC Trustee Carson City, Nevada	Standard	2026-09-30	Valid
N9393Q	Beech F33A	Fixed-wing, single engine	D5167 LLC Kalispell, Montana	Standard	2026-09-28	Valid
N2044V	Beech A36	Fixed-wing, single engine	Performance Construction LLC Paris, Texas	Standard	2026-09-27	Valid
N504Q	Cessna U206D	Fixed-wing, single engine	Chelatna Lake Lodge LLC Anchorage, Alaska	Standard	2026-09-27	Valid
N58HC	Beech 58	Fixed-wing, multi-engine	Medina Sky LLC Medina, Ohio	Standard	2026-09-26	Valid
N7433N	Cessna U206G	Fixed-wing, single engine	Fixed Gear LLC Sherwood, Arkansas	Standard	2026-09-25	Valid
N1880L	Beech V35B	Fixed-wing, single engine	South Regional Aviation Enterprise Boynton Beach, Florida	Standard	2026-09-24	Valid
N254S	Cessna 210L	Fixed-wing, single engine	Individual owner Arizona	Standard	2026-09-24	Valid
N104LA	Beech F33A	Fixed-wing, single engine	Withheld at owner's request	Standard	2026-09-23	Valid
N222XL	Cessna A185F	Fixed-wing, single engine	Individual owner Wisconsin	Standard	2026-09-23	Valid
N2999M	Beech F33A	Fixed-wing, single engine	Individual owner California	Standard	2026-09-23	Valid
N7385R	Beech 58	Fixed-wing, multi-engine	Cw Aircraft LLC Atlanta, Georgia	Standard	2026-09-23	Valid
N87461	Cessna 310R	Fixed-wing, multi-engine	Cya Aviation LLC Gainesville, Florida	Standard	2026-09-23	Valid
N500GE	Beech A36	Fixed-wing, single engine	Stevenson Anesthesia Associates PC Wolfforth, Texas	Standard	2026-09-22	Valid
N5852F	Cessna 210G	Fixed-wing, single engine	Alvidrez Investments Group INC Lakewood, California	Standard	2026-09-22	Valid
N66840	Beech A36	Fixed-wing, single engine	Lowery Aviation LLC Burwell, Nebraska	Standard	2026-09-22	Valid
N8601Z	Cessna P206B	Fixed-wing, single engine	Magnolia Springs Properties INC Kirbyville, Texas	Standard	2026-09-21	Valid
N1693W	Beech V35B	Fixed-wing, single engine	Antique Endeavors LLC Missoula, Montana	Standard	2026-09-19	Valid
N4158B	Bellanca 17-30A	Fixed-wing, single engine	Capristo Construction Cape Coral, Florida	Standard	2026-09-19	Valid
N155WC	Beech E-55	Fixed-wing, multi-engine	Tca Equities LLC Advance, North Carolina	Standard	2026-09-18	Valid
N9022V	Beech A36	Fixed-wing, single engine	Blu Dog Aviation LLC Greenwich, New York	Standard	2026-09-17	Valid
N137TW	Beech V35B	Fixed-wing, single engine	Individual owner Maryland	Standard	2026-09-16	Valid
N221AB	Beech V35A	Fixed-wing, single engine	Flying Banana LLC Onsted, Michigan	Standard	2026-09-16	Valid
N300PJ	Calloway SENIOR AERO SPORT	Fixed-wing, single engine	Legacy of Speed LLC Warsaw, Indiana	Experimental	2026-09-16	Valid
N7208R	Beech V35B	Fixed-wing, single engine	Individual owner Washington	Standard	2026-09-16	Valid
N1860A	Beech A36	Fixed-wing, single engine	Ary CO Ac & Heat LLC Decatur, Texas	Standard	2026-09-15	Valid
N8924M	Beech S35	Fixed-wing, single engine	Tre Aviation CORP Wilmington, Delaware	Standard	2026-09-15	Valid
N5451V	Cessna 210L	Fixed-wing, single engine	Individual owner Georgia	Standard	2026-09-14	Valid
N8600Q	Beech S35	Fixed-wing, single engine	Individual owner Louisiana	Standard	2026-09-14	Valid
N206F	Cessna U206F	Fixed-wing, single engine	Moreau Aviation LLC Wasilla, Alaska	Restricted	2026-09-12	Valid
N6640L	Beech V35B	Fixed-wing, single engine	Individual owner New Mexico	Standard	2026-09-12	Valid
N781LD	Beech V35B	Fixed-wing, single engine	Individual owner New York	Standard	2026-09-12	Valid
N3753Y	Cessna 210D	Fixed-wing, single engine	Individual owner Arizona	Standard	2026-09-11	Valid
N1618M	Cessna A185E	Fixed-wing, single engine	Individual owner Alaska	Standard	2026-09-10	Valid
N22TG	Cessna 210M	Fixed-wing, single engine	Individual owner Florida	Standard	2026-09-10	Valid
N3844Y	Cessna 210D	Fixed-wing, single engine	Co-owned owner Georgia	Standard	2026-09-09	Valid
N4485S	Beech V35B	Fixed-wing, single engine	Co-owned owner Texas	Standard	2026-09-09	Valid
N488FD	Beech V35A	Fixed-wing, single engine	Individual owner Texas	Standard	2026-09-09	Valid
N6PD	Cessna 210M	Fixed-wing, single engine	Individual owner Arkansas	Standard	2026-09-09	Valid
N7092T	Beech 58	Fixed-wing, multi-engine	Hidden Valley Aviation LLC Denton, Texas	Standard	2026-09-09	Valid
N9105S	Beech F33A	Fixed-wing, single engine	Co-owned owner Arizona	Standard	2026-09-09	Valid
N949BG	Beech A36	Fixed-wing, single engine	Individual owner Texas	Standard	2026-09-09	Valid
N317SC	Beech V35A	Fixed-wing, single engine	Individual owner North Carolina	Standard	2026-09-08	Valid
N2036Z	Beech A36	Fixed-wing, single engine	Crescent Cross Aviation LLC Ismay, Montana	Standard	2026-09-07	Valid
N8123G	Cessna U206G	Fixed-wing, single engine	Individual owner Alaska	Standard	2026-09-07	Valid
N8400Q	Cessna A185F	Fixed-wing, single engine	Spillman Aviation LLC Colorado Springs, Colorado	Standard	2026-09-07	Valid
N93229	Cessna A185F	Fixed-wing, single engine	Back Country Club LLC Crawford, Texas	Standard	2026-09-07	Valid
N93547	Bellanca 17-30A	Fixed-wing, single engine	Co-owned owner Texas	Standard	2026-09-07	Valid
N9811Z	Cessna 206	Fixed-wing, single engine	Black Hawk Brothers LLC Lakeland, Florida	Standard	2026-09-07	Valid
N185JN	Cessna A185F	Fixed-wing, single engine	Individual owner Alaska	Standard	2026-09-05	Valid
N2641Z	Cessna 310R	Fixed-wing, multi-engine	Tfs Air LLC Loveland, Colorado	Standard	2026-09-05	Valid
N707WL	Beech 58	Fixed-wing, multi-engine	Flight Solutions LLC Chesterfield, Missouri	Standard	2026-09-05	Valid
N9939Z	Cessna U206G	Fixed-wing, single engine	River Front Akn LLC Anchorage, Alaska	Standard	2026-09-05	Valid
N3772Q	Beech V35	Fixed-wing, single engine	Boav8R LLC Marana, Arizona	Standard	2026-09-03	Valid
N185JW	Cessna A185F	Fixed-wing, single engine	5Jw LLC Sheridan, Wyoming	Multiple	2026-09-02	Valid
N6023Q	Beech A36	Fixed-wing, single engine	Cr Mcdowell Construction CO INC Keokuk, Iowa	Standard	2026-09-02	Valid
N9006V	Beech V35B	Fixed-wing, single engine	Buckholts Texas LLC Buckholts, Texas	Standard	2026-09-02	Valid
N1985C	Beech S35	Fixed-wing, single engine	Co-owned owner Texas	Standard	2026-09-01	Valid
N36363	Beech V35B	Fixed-wing, single engine	Individual owner California	Standard	2026-09-01	Valid
N4799V	Bellanca 17-30	Fixed-wing, single engine	Departure Aviation Services LLC Laurel Hill, North Carolina	Standard	2026-09-01	Valid
N62JR	Beech F33A	Fixed-wing, single engine	N62Jr LLC Lakeside, Montana	Standard	2026-09-01	Valid
N9947G	Cessna A188A	Fixed-wing, single engine	Arthur Aviation LLC Arthur, North Dakota	Multiple	2026-09-01	Valid
N22CB	Cessna A185F	Fixed-wing, single engine	Individual owner Alaska	Standard	2026-08-30	Valid
N8241R	Bellanca 17-30A	Fixed-wing, single engine	Okie Flyers LLC Norman, Oklahoma	Standard	2026-08-30	Valid
N25675	Beech A36	Fixed-wing, single engine	Co-owned owner Texas	Standard	2026-08-29	Valid
N3028W	Beech A36	Fixed-wing, single engine	K2 Aviation LLC Carroll, Iowa	Standard	2026-08-29	Valid
N625S	Beech E-55	Fixed-wing, multi-engine	Individual owner Tennessee	Standard	2026-08-29	Valid
N1803X	Beech A36	Fixed-wing, single engine	Trtt Investments LLC Tahlequah, Oklahoma	Standard	2026-08-28	Valid
N18760	Beech V35B	Fixed-wing, single engine	Twinfin LLC Port Orange, Florida	Standard	2026-08-28	Valid
N28073	Bellanca 17-30A	Fixed-wing, single engine	Individual owner Nebraska	Standard	2026-08-28	Valid
N1475F	Cessna A185F	Fixed-wing, single engine	Ac Group LLC Helena, Montana	Standard	2026-08-27	Valid
N1800F	Cessna 210E	Fixed-wing, single engine	Individual owner Idaho	Standard	2026-08-26	Valid
N34NC	Cessna A185F	Fixed-wing, single engine	Spencer Coastal Air LLC Ellsworth, Maine	Standard	2026-08-26	Valid
N6199F	Cessna 210J	Fixed-wing, single engine	Acara Aviation LLC Portage, Michigan	Standard	2026-08-26	Valid
N7802R	Beech V35A	Fixed-wing, single engine	Individual owner Florida	Standard	2026-08-26	Valid
N7837R	Beech D55	Fixed-wing, multi-engine	Eob Aviation LLC Grand Haven, Michigan	Standard	2026-08-26	Valid
N8451Q	Cessna U206F	Fixed-wing, single engine	Runway Three Aviation LLC Kalispell, Montana	Standard	2026-08-26	Valid
N121LL	Cessna U206G	Fixed-wing, single engine	Wild Blue Air LLC Homer, Alaska	Standard	2026-08-24	Valid
N1825S	Beech A36	Fixed-wing, single engine	Individual owner Indiana	Standard	2026-08-24	Valid
N185	Cessna A185F	Fixed-wing, single engine	Individual owner Nevada	Standard	2026-08-24	Valid
N2592X	Cessna P206	Fixed-wing, single engine	Lorraines Blue Sky Aviation LLC Norman, Oklahoma	Standard	2026-08-24	Valid
N301CT	Beech 58	Fixed-wing, multi-engine	Vatm Sky Investments LLC Thomson, Georgia	Standard	2026-08-24	Valid
N43DB	Beech D55	Fixed-wing, multi-engine	Individual owner Georgia	Standard	2026-08-22	Valid
N185ME	Cessna A185F	Fixed-wing, single engine	Strength LLC Brandon, Mississippi	Standard	2026-08-21	Valid
N761KD	Cessna 210M	Fixed-wing, single engine	Galaxy Aviation LLC Nantucket, Massachusetts	Standard	2026-08-20	Valid
N756XY	Cessna U206G	Fixed-wing, single engine	Arizona Air Salvage Phoenix, Arizona	Standard	2026-08-19	Valid
N982SF	Cessna P206E	Fixed-wing, single engine	Co-owned owner Washington	Multiple	2026-08-19	Valid
N5105J	Cessna 310R	Fixed-wing, multi-engine	Individual owner California	Standard	2026-08-18	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.