Engines · turboshaft · data as of October 5, 2026

Allison (Rolls-Royce) 250 series

446 aircraft on the U.S. register carry an Allison (Rolls-Royce) 250 series engine, rated at about 250 horsepower. The Bell 206 JetRanger and LongRanger is the model most often fitted with it (243 aircraft). The aircraft carrying it were built between 1962 and 2005.

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 Allison (Rolls-Royce) 250 series (6 codes). FAA spellings: 250 SER 250HP · 250 SER 250HP · 250 SER 317HP · 250 SER 400HP · 250 SERIES · 250 SER.

Fitted to model families

Bell 206 JetRanger and LongRanger243Hughes Helicopters Inc HUGHES 36952Hughes 369 500 series helicopters34Bell 40723Bell 4716Hiller UH-1215Enstrom Helicopter Corp 48012Bell 4308Beechcraft A36 Bonanza7Fairchild Hiller FH-11005Cessna P210 Pressurized Centurion3Siai-Marchetti SM-10193

Bell 206 JetRanger and LongRanger · Hughes Helicopters Inc HUGHES 369 · Hughes 369 500 series helicopters · Bell 407 · Bell 47 · Hiller UH-12 · Enstrom Helicopter Corp 480 · Bell 430 · Beechcraft A36 Bonanza · Fairchild Hiller FH-1100

Where they are owner's state

Delaware46California43Florida32Texas30Missouri18Louisiana18Oregon17Alaska17Montana16Washington12

Kind of aircraft

Helicopters422 (95%)Piston singles16 (4%)Turboprops7 (2%)Piston twins1 (0.2%)

When the aircraft were built by decade

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

Fitted to

Bell 206 JetRanger and LongRanger 243 with this engine series
Hughes Helicopters Inc HUGHES 369 52 with this engine series
Hughes 369 500 series helicopters 34 with this engine series
Bell 407 23 with this engine series
Bell 47 16 with this engine series
Hiller UH-12 15 with this engine series
Enstrom Helicopter Corp 480 12 with this engine series
Bell 430 8 with this engine series

Where they are

Delaware 46 of these aircraft
California 43 of these aircraft
Florida 32 of these aircraft
Texas 30 of these aircraft
Missouri 18 of these aircraft

Biggest operators

Air Evac Ems INC 17 of these aircraft
Temsco Helicopters INC 6 of these aircraft
Summit Helicopters INC 4 of these aircraft
Ranger Aviation Leasing LLC 4 of these aircraft
Magnum Aviation LLC 4 of these aircraft

Analytics

These connections as data: /graph/engine/allison-rolls-royce-250-series.json · about the eFlight graph.

Aircraft newest certificates first · 446

Tail no.	Maker and model	Group	Owner and base	Certificate	Registered	Status
N56BH	Bell 206B	Rotorcraft	Pinnacle Helicopters INC Victoria, Minnesota	Standard	2019-06-25	Valid
N494AE	Bell 407	Rotorcraft	Air Evac Ems INC O Fallon, Missouri	Standard	2019-06-05	Valid
N556AC	Hughes Helicopters Inc HUGHES 369D	Rotorcraft	Ac Odyssey LLC Bellevue, Washington	Standard	2019-05-22	Valid
N9113Q	Hughes 369HS	Rotorcraft	Sea CORP Helicopters INC Wilmington, Delaware	Standard	2019-05-09	Valid
N972RH	Bell 206B	Rotorcraft	Friend Ships Galveston, Texas	Standard	2019-03-25	Valid
N138TX	Hughes Helicopters Inc HUGHES 369D	Rotorcraft	Air2 LLC Blountville, Tennessee	Standard	2019-03-16	Valid
N2196J	Bell 206B	Rotorcraft	Iron Horse Cub LLC Arlington, Texas	Standard	2019-03-16	Valid
N506MT	Bell 407	Rotorcraft	Med Trans CORP Denton, Texas	Standard	2019-02-25	Valid
N38NR	Bell 206B	Rotorcraft	38Nr LLC Palm Harbor, Florida	Standard	2019-02-23	Valid
N745MB	Md Helicopters Inc 600N	Rotorcraft	Cobra Aviation Services LLC Ashland, Oregon	Standard	2019-02-19	Valid
N511SH	Hughes Helicopters Inc HUGHES 369D	Rotorcraft	Hawkeye Helicopter LLC Lyndon, Kansas	Standard	2019-02-13	Valid
N88TC	Bell 206B	Rotorcraft	Helicopter Services of Illinois LLC Fisher, Illinois	Restricted	2018-11-17	Valid
N7DQ	Bell Helicopter Textron 206L-1	Rotorcraft	Minnesota Helicopters INC Blaine, Minnesota	Standard	2018-11-13	Valid
N79AE	Bell Helicopter Textron 206L-1	Rotorcraft	Avid Aviation Group INC Jupiter, Florida	Standard	2018-08-30	Valid
N476KA	Bell 206B	Rotorcraft	N476Ka LLC Wasilla, Alaska	Standard	2018-08-28	Valid
N413TV	Bell Helicopter Textron 206L-1	Rotorcraft	Tri Rotor Spray & Chemical Ulysses, Kansas	Standard	2018-07-31	Valid
N480B	Enstrom Helicopter Corp 480	Rotorcraft	Individual owner Oregon	Standard	2018-06-25	Valid
N9118F	Hughes 369HS	Rotorcraft	Co-owned owner California	Standard	2018-06-12	Valid
N8612F	Hughes Helicopters Inc HUGHES 369D	Rotorcraft	Gulf Helicopters LLC Santa Fe, Texas	Standard	2018-06-04	Valid
N303AE	Bell Helicopter Textron 206L-1	Rotorcraft	North Wind Aviation LLC Cottage Grove, Oregon	Standard	2018-04-05	Valid
N5WB	Bell 206B	Rotorcraft	Helicopter Solutions Mt INC Laurel, Montana	Standard	2018-02-27	Valid
N777CP	Bell 206B	Rotorcraft	Wild Goose Airways of Plant City LLC Thonotosassa, Florida	Standard	2018-02-07	Valid
N4032Y	Hiller UH-12E	Rotorcraft	Bank of Utah Trustee Salt Lake City, Utah	Restricted	2018-02-06	Valid
N513HA	Hiller UH-12E	Rotorcraft	Magnum Aviation LLC Goff, Kansas	Standard	2018-01-29	Valid
N543HA	Hiller UH-12E	Rotorcraft	Magnum Aviation LLC Goff, Kansas	Experimental	2018-01-29	Valid
N27UK	Bell 206B	Rotorcraft	Orlando Aircraft Sales LLC Orlando, Florida	Standard	2017-12-29	Valid
N206NU	Bell 206B	Rotorcraft	North Wind Aviation LLC Chelan, Washington	Restricted	2017-12-12	Valid
N431HF	Bell 430	Rotorcraft	Co-owned owner New Jersey	Standard	2017-11-28	Valid
N10814	Bell Helicopter Textron 206L-1	Rotorcraft	Gm Leasing Company LLC Broussard, Louisiana	Standard	2017-10-30	Valid
N9034F	Hughes 369HS	Rotorcraft	Stuart Aviation INC Wilmington, Delaware	Standard	2017-10-30	Valid
N5007F	Bell Helicopter Textron 206L-1	Rotorcraft	Patriot Aviation INC Greenville, Delaware	Standard	2017-07-19	Reports overdue
N546SA	Bell 206B	Rotorcraft	Certified Medical Enterprises LLC Murrieta, California	Standard	2017-07-19	Valid
N58140	Bell 206B	Rotorcraft	San Juan Aviation LLC Wilmington, Delaware	Standard	2017-06-05	Valid
N137MS	Bell 206B	Rotorcraft	Kansas State University Salina, Kansas	Standard	2017-05-19	Valid
N205PA	Bell 206B	Rotorcraft	Ridgeline Enterprises LLC Twin Falls, Idaho	Standard	2017-05-16	Valid
N2240W	Bell 47G-3B-2	Rotorcraft	Yarak Aviation LLC Big Timber, Montana	Multiple	2017-04-03	Valid
N124SH	Bell 47G-4A	Rotorcraft	Scott'S Helicopter Services INC Le Sueur, Minnesota	Standard	2017-03-21	Valid
N1075Y	Bell Helicopter Textron 206L-1	Rotorcraft	Shoreline Aircraft Leasing LLC Lewes, Delaware	Standard	2017-03-07	Valid
N580D	Sievers Kelly RANGER II	Rotorcraft	Classic Rotors Museum Ramona, California	Experimental	2017-02-24	Valid
N5071F	Fairchild Hiller FH-1100	Rotorcraft	Hiller Aviation Group INC Carson City, Nevada	Standard	2017-01-27	Valid
N1079A	Bell 206B	Rotorcraft	N1079A LLC Missoula, Montana	Standard	2016-12-12	Valid
N363JS	Hughes 369HS	Rotorcraft	Individual owner Arizona	Standard	2016-11-17	Valid
N109SF	Agusta Spa A109A II	Rotorcraft	Heli Assets LLC Mesa, Arizona	Standard	2016-11-04	Valid
N321AW	Bell 206A	Rotorcraft	Individual owner Ohio	Multiple	2016-10-27	Valid
N705FS	Beech A36	Fixed-wing, single engine	Hvl Construction INC Fresno, California	Standard	2016-10-27	Valid
N668M	Hughes 369HS	Rotorcraft	B Laird LTD Durango, Colorado	Standard	2016-08-26	Valid
N418SV	Bell 206B	Rotorcraft	Canyon Creek Investments LLP Sapulpa, Oklahoma	Standard	2016-08-23	Valid
N8306F	Hughes Helicopters Inc HUGHES 369D	Rotorcraft	Rotor Blade LLC Georgetown, South Carolina	Standard	2016-08-03	Valid
N2187L	Bell 206B	Rotorcraft	Ranger Aviation Leasing LLC Wilmington, Delaware	Standard	2016-07-11	Valid
N86N	Bell 206B	Rotorcraft	Cb Couch INC Walcott, Arkansas	Standard	2016-06-27	Valid
N1909R	Bell 206B	Rotorcraft	Centerline Holdings Camden, Delaware	Standard	2016-06-15	Valid
N5BG	Messerschmitt-Boelkow-Blohm BO-105S	Rotorcraft	Individual owner Oregon	Standard	2016-05-05	Valid
N206FT	Bell 206B	Rotorcraft	Individual owner Missouri	Standard	2016-02-18	Valid
N866H	Bell 206B	Rotorcraft	Lake Superior Helicopters LLC Duluth, Minnesota	Restricted	2015-12-17	Valid
N3766Z	Hughes 369HS	Rotorcraft	Individual owner California	Standard	2015-06-16	Valid
N133BH	Hughes 369HS	Rotorcraft	Brown Helicopter INC Pensacola, Florida	Standard	2015-04-23	Valid
N432RD	Enstrom Helicopter Corp 480	Rotorcraft	Airdine LLC San Francisco, California	Standard	2015-04-22	Valid
N453RA	Bell 206B	Rotorcraft	Ranger Aviation Leasing LLC Wilmington, Delaware	Standard	2015-04-07	Valid
N16760	Bell 206L	Rotorcraft	Co-owned owner Florida	Standard	2015-03-30	Valid
N64FC	Bell Helicopter Textron 206L-1	Rotorcraft	Zma LLC North Little Rock, Arkansas	Standard	2015-02-17	Valid
N1612	Bell 407	Rotorcraft	Gm Leasing CO LLC Broussard, Louisiana	Standard	2015-01-28	Valid
N204S	Bell 206B	Rotorcraft	Wybenga Aviation LLC Twin Falls, Idaho	Standard	2014-12-22	Valid
N262BH	Bell 206B	Rotorcraft	Lcs Energy INC Dover, Delaware	Standard	2014-09-26	Valid
N5747X	Bell 206B	Rotorcraft	Blair Air Service INC Lemoore, California	Standard	2014-09-18	Valid
N79LR	Bell Helicopter Textron 206L-1	Rotorcraft	Individual owner Oregon	Standard	2014-08-08	Valid
N62FM	Bell 206B	Rotorcraft	Mbm Aviation Consultants INC Wilmington, Delaware	Standard	2014-07-25	Valid
N14807	Bell 47G-5A	Rotorcraft	Hammock Flying Service INC Smithville, Arkansas	Restricted	2014-06-27	Valid
N475AL	Bell 47G-3B-2	Rotorcraft	Scotts Helicopter Service INC Le Sueur, Minnesota	Standard	2014-06-24	Valid
N206KR	Bell 206A	Rotorcraft	Handy Air INC Douglas, Georgia	Standard	2014-06-13	Valid
N61KH	Bell 206B	Rotorcraft	Kash Helicopter Services LLC Mount Vernon, Illinois	Standard	2014-05-30	Valid
N142CC	Enstrom Helicopter Corp 480	Rotorcraft	Machinery Service CO INC Wiscasset, Maine	Standard	2014-05-27	Valid
N768MH	Sikorsky S-76A	Rotorcraft	Gm Leasing CO LLC Broussard, Louisiana	Standard	2014-05-14	Valid
N2150M	Bell Helicopter Textron 206L-1	Rotorcraft	T&M Aviation INC Abbeville, Louisiana	Standard	2014-05-05	Valid
N851HC	Bell 407	Rotorcraft	Gm Leasing CO LLC Broussard, Louisiana	Standard	2014-05-05	Valid
N888SW	Ardoyno John W SEAWIND 3000	Fixed-wing, single engine	Seawind Mjw LLC Wappingers Falls, New York	Experimental	2014-04-14	Valid
N36MK	Bell 206B	Rotorcraft	Horizon Helicopters INC Newark, Delaware	Standard	2013-12-23	Valid
N83193	Bell 206B	Rotorcraft	R&B Helicopters INC Salinas, California	Standard	2013-09-19	Valid
N98SM	Bell 206B	Rotorcraft	Individual owner Michigan	Standard	2013-08-30	Valid
N40290	Hiller UH-12E	Rotorcraft	Haddock Flying Service INC Salters, South Carolina	Experimental	2013-07-26	Valid
N2193X	Bell 206B	Rotorcraft	Industrial Helicopters LLC Lafayette, Louisiana	Multiple	2013-03-18	Valid
N407CP	Bell 407	Rotorcraft	Classic Medical INC North Salt Lake, Utah	Standard	2013-02-06	Valid
N2041X	Bell 206B	Rotorcraft	Qbl Aviation LLC Waco, Texas	Standard	2013-02-05	Valid
N775DW	Siai-Marchetti L1019	Fixed-wing, single engine	Individual owner Oregon	Experimental	2013-01-07	Valid
N422SD	Bell 206B	Rotorcraft	Parker Helicopter LLC Watsonville, California	Standard	2012-12-18	Valid
N407CH	Bell 407	Rotorcraft	Classic Medical INC North Salt Lake, Utah	Standard	2012-11-27	Valid
N200HR	Bell 206B	Rotorcraft	Sutter Air INC Los Banos, California	Standard	2012-11-13	Valid
N7963J	Bell 206A	Rotorcraft	San Juan Aviation LLC Wilmington, Delaware	Standard	2012-09-28	Valid
N3906C	Bell 206B	Rotorcraft	Individual owner Texas	Standard	2012-07-31	Valid
N91018	Bell 47G-3B-1	Rotorcraft	Two Wise Guys Aviation LLC Le Sueur, Minnesota	Restricted	2012-06-29	Valid
N5743W	Bell 206B	Rotorcraft	Fly Hangar 13 LLC Mico, Texas	Standard	2012-06-25	Valid
N480FX	Enstrom Helicopter Corp 480	Rotorcraft	Mansfield Heliflight INC Milton, Vermont	Standard	2012-06-22	Valid
N369AJ	Hughes OH-6A	Rotorcraft	Individual owner Michigan	Standard	2012-05-21	Valid
N1106G	Hughes Helicopters Inc HUGHES 369D	Rotorcraft	Individual owner Florida	Standard	2012-04-19	Valid
N500VZ	Hughes 369HS	Rotorcraft	Sea CORP Helicopters INC Wilmington, Delaware	Standard	2012-04-13	Valid
N771KE	Maule MT-7-420	Fixed-wing, single engine	Individual owner Alaska	Standard	2012-04-12	Valid
N44BC	Bell 206B	Rotorcraft	Co-owned owner Florida	Standard	2012-02-02	Valid
N480TT	Enstrom Helicopter Corp 480	Rotorcraft	Santa Lucia Holding Forked River, New Jersey	Standard	2012-01-06	Valid
N541	Hughes Helicopters Inc HUGHES 369D	Rotorcraft	Chaparral Air Group Grapevine, Texas	Standard	2011-11-23	Valid
N105LP	Bell 206B	Rotorcraft	Co-owned owner Alaska	Standard	2011-08-23	Valid
N970YG	Cessna P210N	Fixed-wing, single engine	Cbk LLC Eagle, Colorado	Standard	2011-08-08	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.