Engines · turboshaft · data as of October 5, 2026

Rolls-Royce 250-C300/A1

351 aircraft on the U.S. register carry a Rolls-Royce 250-C300/A1 engine, rated at about 300 horsepower. The Robinson R66 is the model most often fitted with it (351 aircraft). The aircraft carrying it were built between 2011 and 2026.

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 Rolls-Royce 250-C300/A1. FAA spelling: 250-C300/A1.

Fitted to model families

Robinson R66351

Robinson R66

Where they are owner's state

Texas76Florida24California23Delaware19Montana15Utah14Alaska14Wyoming11Illinois11Idaho10

Kind of aircraft

Helicopters351 (100%)

When the aircraft were built by decade

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

Fitted to

Robinson R66 351 with this engine series

Where they are

Texas 76 of these aircraft
Florida 24 of these aircraft
California 23 of these aircraft
Delaware 19 of these aircraft
Montana 15 of these aircraft

Biggest operators

Higgins Leasing INC 38 of these aircraft
Robinson Helicopter CO 8 of these aircraft
Tvpx Aircraft Solutions INC Trustee 4 of these aircraft
Emerald City Aircraft Leasing INC 4 of these aircraft

Analytics

These connections as data: /graph/engine/rolls-royce-250-c300-a1.json · about the eFlight graph.

Aircraft newest certificates first · 351

Tail no.	Maker and model	Group	Owner and base	Certificate	Registered	Status
N5861H	Robinson Helicopter R66	Helicopter	Higgins Leasing INC The Woodlands, Texas	Standard	2017-07-12	Valid
N67LD	Robinson Helicopter R66	Helicopter	Canyon Exotic Game Ranch LLC Aledo, Texas	Standard	2017-06-30	Valid
N58EE	Robinson Helicopter R66	Helicopter	Gbsj LLC West Hartford, Connecticut	Standard	2017-05-16	Valid
N11ZG	Robinson Helicopter R66	Helicopter	White Star Marine Services LLC Basalt, Colorado	Standard	2017-04-25	Valid
N664MP	Robinson Helicopter R66	Helicopter	Individual owner Idaho	Standard	2017-04-25	Valid
N366RK	Robinson Helicopter R66	Helicopter	Jaars INC Waxhaw, North Carolina	Standard	2017-04-19	Valid
N812RJ	Robinson Helicopter R66	Helicopter	Jeffs Aviation LLC Wilmington, Delaware	Standard	2017-01-17	Valid
N770AK	Robinson Helicopter R66	Helicopter	Oakley Air LLC North Little Rock, Arkansas	Standard	2016-11-03	Valid
N366VB	Robinson Helicopter R66	Helicopter	Rouse Holdings LLC Schriever, Louisiana	Standard	2016-09-19	Valid
N621MB	Robinson Helicopter R66	Helicopter	Ntm Foundation Bend, Oregon	Standard	2016-08-24	Valid
N664ES	Robinson Helicopter R66	Helicopter	Big 4 Investments LLC Roseland, Louisiana	Standard	2016-08-24	Valid
N826CE	Robinson Helicopter R66	Helicopter	Bmb Equipment Holding LLC Carlsbad, New Mexico	Standard	2016-08-15	Valid
N5YU	Robinson Helicopter R66	Helicopter	Byte Me Avionics INC Jensen Beach, Florida	Standard	2016-08-04	Valid
N166MG	Robinson Helicopter R66	Helicopter	Individual owner Florida	Standard	2016-02-23	Valid
N660SM	Robinson Helicopter R66	Helicopter	Skyline Helicopters LLC Salem, Missouri	Standard	2016-02-19	Valid
N661SM	Robinson Helicopter R66	Helicopter	Skyline Helicopters LLC Salem, Missouri	Standard	2016-02-19	Valid
N1DX	Robinson Helicopter R66	Helicopter	Ravens Holdings Aviation LLC Reddick, Florida	Standard	2016-01-22	Valid
N166GH	Robinson Helicopter R66	Helicopter	144Gh Aviation LLC Dover, Delaware	Standard	2015-11-10	Valid
N404VB	Robinson Helicopter R66	Helicopter	Mammoth Sierra LLC Laguna Beach, California	Standard	2015-10-02	Valid
N614F	Robinson Helicopter R66	Helicopter	Central Copters INC Bozeman, Montana	Standard	2015-09-02	Valid
N7050V	Robinson Helicopter R66	Helicopter	Foster Ranch LP Winnemucca, Nevada	Standard	2015-02-10	Valid
N7101Z	Robinson Helicopter R66	Helicopter	Kcm Farms LLC Bell City, Louisiana	Standard	2015-02-02	Valid
N36SH	Robinson Helicopter R66	Helicopter	Withheld at owner's request	Standard	2014-12-04	Valid
N7086R	Robinson Helicopter R66	Helicopter	Wyoming Helicopters INC Wasilla, Alaska	Restricted	2014-10-23	Valid
N70DA	Robinson Helicopter R66	Helicopter	Discovery Air LLC East Hampton, Connecticut	Standard	2014-10-08	Valid
N166FS	Robinson Helicopter R66	Helicopter	Silverhawk Aviation Academy LLC Caldwell, Idaho	Standard	2014-09-09	Valid
N462PD	Robinson Helicopter R66	Helicopter	City of Fontana California Fontana, California	Standard	2014-07-16	Valid
N266EH	Robinson Helicopter R66	Helicopter	Epic Helicopters Sales and Leasing LLC Fort Worth, Texas	Standard	2014-07-09	Valid
N5860H	Robinson Helicopter R66	Helicopter	Higgins Leasing INC Woodlands, Texas	Restricted	2014-04-02	Valid
N7000J	Robinson Helicopter R66	Helicopter	Individual owner California	Standard	2014-01-09	Valid
N7015H	Robinson Helicopter R66	Helicopter	Execumed CORP Guaynabo, Puerto Rico	Standard	2013-09-24	Valid
N969DE	Robinson Helicopter R66	Helicopter	Psr Air Services Dallas, Texas	Standard	2013-08-29	Valid
N724MD	Robinson Helicopter R66	Helicopter	Meehan Airlines INC Clearwater Beach, Florida	Standard	2013-06-13	Valid
N700HC	Robinson Helicopter R66	Helicopter	700Hc LLC Edmond, Oklahoma	Standard	2013-02-21	Valid
N661PA	Robinson Helicopter R66	Helicopter	Aircraft Management Group Intl CORP Trustee Wilmington, Delaware	Standard	2013-02-07	Valid
N537JB	Robinson Helicopter R66	Helicopter	Jm Air LLC Leesburg, Virginia	Standard	2013-01-16	Valid
N321WE	Robinson Helicopter R66	Helicopter	321We Airtour LLC Sebastopol, California	Standard	2012-10-15	Valid
N166PD	Robinson Helicopter R66	Helicopter	City of Fontana California Fontana, California	Standard	2012-10-02	Valid
N13FR	Robinson Helicopter R66	Helicopter	Robinson Helicopter CO Torrance, California	Standard		Valid
N152KB	Robinson Helicopter R66	Helicopter	Individual owner Oklahoma	Standard		Sale reported
N228JJ	Robinson Helicopter R66	Helicopter	Individual owner Michigan	Standard		Pending
N266RH	Robinson Helicopter R66	Helicopter	Robinson Helicopter CO Torrance, California	Experimental		Valid
N334L	Robinson Helicopter R66	Helicopter	Individual owner Mississippi	Standard		Pending
N4059A	Robinson Helicopter R66	Helicopter	Tech Heli LLC Fort Lauderdale, Florida	Standard		Valid
N4060W	Robinson Helicopter R66	Helicopter	Robinson Helicopter CO Torrance, California	Standard		Valid
N466R	Robinson Helicopter R66	Helicopter	Robinson Helicopter CO Torrance, California	Experimental		Valid
N487AX	Robinson Helicopter R66	Helicopter	Individual owner Texas	Standard		Pending
N625BH	Robinson Helicopter R66	Helicopter	Robinson Helicopter CO Torrance, California	Standard		Valid (manufacturer)
N645PV	Robinson Helicopter R66	Helicopter	Robinson Helicopter CO Torrance, California	Experimental		Valid (manufacturer)
N662TP	Robinson Helicopter R66	Helicopter	Robinson Helicopter CO Torrance, California	Standard		Valid (manufacturer)
N66RS	Robinson Helicopter R66	Helicopter	Robinson Helicopter CO Torrance, California	Standard		Valid (manufacturer)

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.