Allison (Rolls-Royce) 250-C20 series
530 aircraft on the U.S. register carry an Allison (Rolls-Royce) 250-C20 series engine, rated at about 420 horsepower. The Bell 206 JetRanger and LongRanger is the model most often fitted with it (324 aircraft). The aircraft carrying it were built between 1967 and 2021.
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-C20 series. FAA spelling: 250-C20 SER.
Fitted to model families
Bell 206 JetRanger and LongRanger324Hughes Helicopters Inc HUGHES 36941Mcdonnell Douglas Helicopter 36941Hughes Helicopters Inc 36917Agusta Spa A10917Mcdonnell Douglas Helicopter 50014Hughes 369 500 series helicopters12Bell 40711Aerospatiale AS-35510Bell OH-587Md Helicopters Inc 5006Md Helicopters Inc 3695
Bell 206 JetRanger and LongRanger · Hughes Helicopters Inc HUGHES 369 · Mcdonnell Douglas Helicopter 369 · Hughes Helicopters Inc 369 · Agusta Spa A109 · Mcdonnell Douglas Helicopter 500 · Hughes 369 500 series helicopters · Bell 407 · Aerospatiale AS-355 · Bell OH-58
Where they are owner's state
Delaware55California48Florida43Texas27Oregon26Utah22Arizona20Washington15Montana15Alaska15
Kind of aircraft
Helicopters529 (100%)Turboprops1 (0.2%)
When the aircraft were built by decade
What the FAA has certified, ordered and been told about the Allison (Rolls-Royce) 250-C20 series the component layer
No FAA order in the current files names this engine series. Operators and repair shops have filed 747 failure reports with the FAA since 1995, 8 of them in the last ten years.
Failure reports 747 since · what operators and shops told the FAA
Parts most often reported as the reports name them
Engine34Bearing27Nozzle27Gearshaft26Seal20Fuel Control18Bleed Valve16Connector15Turbine Wheel13Blade12
Latest reports
2026-06-11Oil System: low pressure
2025-11-08Blade: failed
2025-04-15Compressor: damaged
2021-09-04Indication Sys: reads high
2019-07-18Shaft: cracked
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
- Bell 206 JetRanger and LongRanger 324 with this engine series
- Hughes Helicopters Inc HUGHES 369 41 with this engine series
- Mcdonnell Douglas Helicopter 369 41 with this engine series
- Hughes Helicopters Inc 369 17 with this engine series
- Agusta Spa A109 17 with this engine series
- Mcdonnell Douglas Helicopter 500 14 with this engine series
- Hughes 369 500 series helicopters 12 with this engine series
- Bell 407 11 with this engine series
Where they are
- Delaware 55 of these aircraft
- California 48 of these aircraft
- Florida 43 of these aircraft
- Texas 27 of these aircraft
- Oregon 26 of these aircraft
Biggest operators
- Helicopters INC 12 of these aircraft
- Brown Helicopter INC 9 of these aircraft
- United States Army 6 of these aircraft
- Bank Of Utah Trustee 6 of these aircraft
- Usda Aphis Ws 5 of these aircraft
Airworthiness
- Failure reports on the Allison (Rolls-Royce) 250-C20 series 747 reports since 1995
Analytics
These connections as data: /graph/engine/allison-rolls-royce-250-c20-series.json · about the eFlight graph.
Aircraft newest certificates first · 530
| Tail no. | Maker and model | Group | Owner and base | Certificate | Registered | Status |
|---|---|---|---|---|---|---|
| N2BQ | Bell 206B-III |
Rotorcraft | Rare Aircraft LTD Faribault, Minnesota |
Standard | 2026-10-05 | ValidFAA registration status code V: Valid registration. All codes |
| N131AE | Messerschmitt-Boelkow-Blohm BO-105S |
Rotorcraft | Atwood Aviation LLC Pickerington, Ohio |
Standard | 2026-10-04 | ValidFAA registration status code V: Valid registration. All codes |
| N179MT | Aerospatiale AS 355F1 |
Rotorcraft | Analar CORP Princeton, New Jersey |
Standard | 2026-10-02 | ValidFAA registration status code V: Valid registration. All codes |
| N67609 | Bell 206B |
Rotorcraft | Individual owner Texas |
Standard | 2026-09-24 | ValidFAA registration status code V: Valid registration. All codes |
| N76431 | Hiller UH-12E |
Rotorcraft | Four Creeks Aviation INC Visalia, California |
Restricted | 2026-08-26 | ValidFAA registration status code V: Valid registration. All codes |
| N445 | Bell 206B-III |
Rotorcraft | Wisk Aero LLC Mountain View, California |
Standard | 2026-08-19 | ValidFAA registration status code V: Valid registration. All codes |
| N9159F | Hughes Helicopters Inc HUGHES 369D |
Rotorcraft | Apex Heli-Support LLC Phoenix, Arizona |
Multiple | 2026-08-08 | ValidFAA registration status code V: Valid registration. All codes |
| N91763 | Bell 206B |
Rotorcraft | Sterling Acres LLC Santa Fe, New Mexico |
Standard | 2026-08-08 | ValidFAA registration status code V: Valid registration. All codes |
| N2155Z | Bell 206B |
Rotorcraft | Heli Incorporated Las Vegas, Nevada |
Standard | 2026-07-23 | ValidFAA registration status code V: Valid registration. All codes |
| N952SD | Mcdonnell Douglas Helicopter 500N |
Rotorcraft | Heli Fly INC Trustee Wilmington, Delaware |
Standard | 2026-07-04 | ValidFAA registration status code V: Valid registration. All codes |
| N53846 | Hughes Helicopters Inc HUGHES 369D |
Rotorcraft | Aerial Solutions INC Tabor City, North Carolina |
Standard | 2026-06-19 | ValidFAA registration status code V: Valid registration. All codes |
| N86ST | Hughes Helicopters Inc HUGHES 369D |
Rotorcraft | Aerial Solutions INC Tabor City, North Carolina |
Standard | 2026-06-19 | ValidFAA registration status code V: Valid registration. All codes |
| N178PA | Bell Helicopter Textron 206L-1 |
Rotorcraft | Orlando Aircraft Sales LLC Orlando, Florida |
Standard | 2026-06-02 | ValidFAA registration status code V: Valid registration. All codes |
| N888EV | Hughes Helicopters Inc 369E |
Rotorcraft | Top Flight Aviation of Mississippi LLC Picayune, Mississippi |
Standard | 2026-05-30 | ValidFAA registration status code V: Valid registration. All codes |
| N516PJ | Hughes Helicopters Inc HUGHES 369D |
Rotorcraft | Individual owner Oregon |
Standard | 2026-05-23 | ValidFAA registration status code V: Valid registration. All codes |
| N6181K | Bell 206B |
Rotorcraft | Bd Aviation LLC Sundance, Wyoming |
Standard | 2026-05-14 | ValidFAA registration status code V: Valid registration. All codes |
| N1103L | Hughes Helicopters Inc HUGHES 369D |
Rotorcraft | Aviation Advantage INC Tabor City, North Carolina |
Restricted | 2026-05-12 | ValidFAA registration status code V: Valid registration. All codes |
| N229HL | Mcdonnell Douglas Helicopter 369E |
Rotorcraft | Aviation Advantage INC Tabor City, North Carolina |
Standard | 2026-05-12 | ValidFAA registration status code V: Valid registration. All codes |
| N5238C | Hughes Helicopters Inc 369E |
Rotorcraft | Aviation Advantage INC Tabor City, North Carolina |
Restricted | 2026-05-12 | ValidFAA registration status code V: Valid registration. All codes |
| N124PD | Mcdonnell Douglas Helicopter 369E |
Rotorcraft | Heli Fly INC Trustee Wilmington, Delaware |
Standard | 2026-03-26 | ValidFAA registration status code V: Valid registration. All codes |
| N206BB | Bell 206B |
Rotorcraft | Nixon Helicopters LLC Mentone, California |
Multiple | 2026-03-13 | ValidFAA registration status code V: Valid registration. All codes |
| N124EH | Messerschmitt-Boelkow-Blohm BO-105S |
Rotorcraft | Jbp Aviation LLC Henderson, Nevada |
Standard | 2026-03-11 | ValidFAA registration status code V: Valid registration. All codes |
| N722LM | Bell 206-L4 |
Rotorcraft | Northwest Helicopters LLC Olympia, Washington |
Standard | 2026-03-02 | ValidFAA registration status code V: Valid registration. All codes |
| N5264Q | Mcdonnell Douglas Helicopter 369E |
Rotorcraft | Southern Aircraft Consultancy INC Trustee Casper, Wyoming |
Restricted | 2026-02-24 | ValidFAA registration status code V: Valid registration. All codes |
| N520AP | Md Helicopters Inc 500N |
Rotorcraft | Ln095 1Vc Trustee Wilmington, Delaware |
Standard | 2026-02-23 | ValidFAA registration status code V: Valid registration. All codes |
| N500XV | Hughes Helicopters Inc HUGHES 369D |
Rotorcraft | Southern Aircraft Consultancy INC Trustee Casper, Wyoming |
Standard | 2026-02-12 | ValidFAA registration status code V: Valid registration. All codes |
| N500TY | Hughes Helicopters Inc 369E |
Rotorcraft | Southern Aircraft Consultancy INC Trustee Casper, Wyoming |
Standard | 2026-01-30 | ValidFAA registration status code V: Valid registration. All codes |
| N206HE | Bell 206B |
Rotorcraft | Southern Aircraft Consultancy INC Trustee Casper, Wyoming |
Restricted | 2026-01-28 | ValidFAA registration status code V: Valid registration. All codes |
| N995KP | Bell 206B |
Rotorcraft | Bank of Utah Trustee Salt Lake City, Utah |
Restricted | 2026-01-28 | ValidFAA registration status code V: Valid registration. All codes |
| N520N | Mcdonnell Douglas Helicopter 500N |
Rotorcraft | Quantumtrace INC Incline Village, Nevada |
Standard | 2026-01-23 | ValidFAA registration status code V: Valid registration. All codes |
| N50TV | Bell 206B |
Rotorcraft | Jet Ranger LLC Cuyahoga Falls, Ohio |
Standard | 2026-01-22 | ValidFAA registration status code V: Valid registration. All codes |
| N206ES | Bell 206B |
Rotorcraft | Waverly 206 LLC Oklahoma City, Oklahoma |
Standard | 2025-12-31 | ValidFAA registration status code V: Valid registration. All codes |
| N3DU | Bell 206B-III |
Rotorcraft | Crile Consolidated Industries INC Washington, Pennsylvania |
Standard | 2025-12-20 | ValidFAA registration status code V: Valid registration. All codes |
| N10AJ | Bell 206B |
Rotorcraft | El Aero Services LLC Elko, Nevada |
Standard | 2025-11-30 | ValidFAA registration status code V: Valid registration. All codes |
| N206XZ | Bell 206B |
Rotorcraft | Sunwest Construction Enterprises INC Tarpon Springs, Florida |
Standard | 2025-10-29 | ValidFAA registration status code V: Valid registration. All codes |
| N98CM | Bell 206B |
Rotorcraft | Co-owned owner Oregon |
Standard | 2025-10-21 | ValidFAA registration status code V: Valid registration. All codes |
| N765KV | Hughes Helicopters Inc 369E |
Rotorcraft | Winco INC Aurora, Oregon |
Multiple | 2025-10-14 | ValidFAA registration status code V: Valid registration. All codes |
| N52BH | Bell 206B |
Rotorcraft | Individual owner Texas |
Standard | 2025-10-09 | ValidFAA registration status code V: Valid registration. All codes |
| N38HH | Bell 206B |
Rotorcraft | Chemair Helicopters INC Jefferson, Wisconsin |
Multiple | 2025-09-30 | ValidFAA registration status code V: Valid registration. All codes |
| N177T | Mcdonnell Douglas Heli Co 500-E |
Rotorcraft | Ellis LLC Helena, Montana |
Standard | 2025-09-24 | ValidFAA registration status code V: Valid registration. All codes |
| N187ND | Bell 206 |
Rotorcraft | Lone Star Helicopters LLC Lago Vista, Texas |
Standard | 2025-09-19 | ValidFAA registration status code V: Valid registration. All codes |
| N612 | Bell 206B-III |
Rotorcraft | Jjs Aviation LLC Bellevue, Iowa |
Multiple | 2025-09-09 | ValidFAA registration status code V: Valid registration. All codes |
| N1158B | Bell 206B |
Rotorcraft | Air Gov 1 LLC Rome, New York |
Standard | 2025-09-08 | ValidFAA registration status code V: Valid registration. All codes |
| N711HL | Agusta Spa A109A II |
Rotorcraft | Individual owner California |
Standard | 2025-08-05 | ValidFAA registration status code V: Valid registration. All codes |
| N9ZV | Bell 206B |
Rotorcraft | L& R Investment Partners LLC Wilmington, Delaware |
Standard | 2025-07-26 | ValidFAA registration status code V: Valid registration. All codes |
| N2043B | Bell 206B |
Rotorcraft | L&R Investment Partners LLC Wilmington, Delaware |
Standard | 2025-07-23 | ValidFAA registration status code V: Valid registration. All codes |
| N5008K | Bell 206B |
Rotorcraft | L&R Investment Partners LLC Wilmington, Delaware |
Standard | 2025-07-23 | ValidFAA registration status code V: Valid registration. All codes |
| N21RT | Bell 206B |
Rotorcraft | L&R Investment Partners LLC Wilmington, Delaware |
Standard | 2025-07-22 | ValidFAA registration status code V: Valid registration. All codes |
| N28HT | Bell 206B |
Rotorcraft | L&R Investment Partners LLC Wilmington, Delaware |
Standard | 2025-07-22 | ValidFAA registration status code V: Valid registration. All codes |
| N150F | Bell 206B |
Rotorcraft | 11 11 Enterprises LLC San German, Puerto Rico |
Standard | 2025-06-27 | ValidFAA registration status code V: Valid registration. All codes |
| N8AU | Bell 206B |
Rotorcraft | Dodson International Parts INC Rantoul, Kansas |
Standard | 2025-06-19 | ValidFAA registration status code V: Valid registration. All codes |
| N9TV | Bell Helicopter Textron Canada 206L-4 |
Rotorcraft | Griffin Television Okc LLC Oklahoma City, Oklahoma |
Standard | 2025-06-13 | ValidFAA registration status code V: Valid registration. All codes |
| N800PH | Messerschmitt BO105CBS |
Rotorcraft | Tomlinson Aviation INC Ormond Beach, Florida |
Standard | 2025-05-15 | ValidFAA registration status code V: Valid registration. All codes |
| N920JP | Hughes Helicopters Inc HUGHES 369D |
Rotorcraft | Kar Aviation LLC Saltville, Virginia |
Multiple | 2025-05-01 | ValidFAA registration status code V: Valid registration. All codes |
| N9QD | Bell 206B |
Rotorcraft | Chemair Helicopters INC Jefferson, Wisconsin |
Standard | 2025-04-14 | ValidFAA registration status code V: Valid registration. All codes |
| N973RH | Bell 206B-III |
Rotorcraft | Turbines LTD West Point, Nebraska |
Standard | 2025-03-25 | ValidFAA registration status code V: Valid registration. All codes |
| N971RH | Bell 206B |
Rotorcraft | Turbines LTD West Point, Nebraska |
Standard | 2025-03-22 | ValidFAA registration status code V: Valid registration. All codes |
| N975RH | Bell 206B |
Rotorcraft | Turbines LTD West Point, Nebraska |
Standard | 2025-03-22 | ValidFAA registration status code V: Valid registration. All codes |
| N979RH | Bell 206B |
Rotorcraft | Turbines LTD West Point, Nebraska |
Standard | 2025-03-22 | ValidFAA registration status code V: Valid registration. All codes |
| N215M | Mcdonnell Douglas Helicopter 500N |
Rotorcraft | Individual owner West Virginia |
Standard | 2025-03-03 | ValidFAA registration status code V: Valid registration. All codes |
| N2944W | Bell 206B |
Rotorcraft | Trinkle Avition LLC Kingsburg, California |
Restricted | 2025-03-03 | ValidFAA registration status code V: Valid registration. All codes |
| N6181A | Bell 206B |
Rotorcraft | Hiline INC Ball Ground, Georgia |
Standard | 2025-03-01 | ValidFAA registration status code V: Valid registration. All codes |
| N922MC | Bell 206A-1 |
Rotorcraft | Geco INC Wilmington, Delaware |
Experimental | 2025-02-25 | ValidFAA registration status code V: Valid registration. All codes |
| N93CP | Bell 206B-III |
Rotorcraft | Klump Aviation LLC Bowie, Arizona |
Standard | 2025-02-20 | ValidFAA registration status code V: Valid registration. All codes |
| N9833F | Bell 206B |
Rotorcraft | Klump Aviation LLC Bowie, Arizona |
Standard | 2025-02-20 | ValidFAA registration status code V: Valid registration. All codes |
| N7173F | Hiller UH-12E |
Rotorcraft | Four Creeks Aviation INC Visalia, California |
Standard | 2025-02-15 | ValidFAA registration status code V: Valid registration. All codes |
| N330TH | Schweizer 269D |
Rotorcraft | Individual owner New York |
Standard | 2025-02-14 | ValidFAA registration status code V: Valid registration. All codes |
| N553EA | Bell 206B |
Rotorcraft | Edgefield Aviation LLC Sandy, Oregon |
Standard | 2025-01-31 | ValidFAA registration status code V: Valid registration. All codes |
| N126KW | Mcdonnell Douglas Helicopter 369E |
Rotorcraft | Hlh Leasing LLC Wilmington, Delaware |
Standard | 2025-01-27 | ValidFAA registration status code V: Valid registration. All codes |
| N6QD | Bell 206B |
Rotorcraft | Sierra Golf Rotorcraft LLC Wilmington, Delaware |
Standard | 2025-01-25 | ValidFAA registration status code V: Valid registration. All codes |
| N7230T | Bell OH-58A |
Rotorcraft | Individual owner California |
Experimental | 2024-12-16 | ValidFAA registration status code V: Valid registration. All codes |
| N101CH | Hughes Helicopters Inc HUGHES 369D |
Rotorcraft | Tri-State Vegetation Management LLC Vevay, Indiana |
Multiple | 2024-12-03 | ValidFAA registration status code V: Valid registration. All codes |
| N335DM | Bell 206B |
Rotorcraft | Individual owner Montana |
Standard | 2024-11-18 | ValidFAA registration status code V: Valid registration. All codes |
| N234JR | Bell 206B |
Rotorcraft | Portland Helicopters LLC Portland, Maine |
Standard | 2024-11-05 | ValidFAA registration status code V: Valid registration. All codes |
| N393S | Bell Helicopter Textron 206L-1 |
Rotorcraft | Southwest Heliservices LLC Mesa, Arizona |
Standard | 2024-11-05 | ValidFAA registration status code V: Valid registration. All codes |
| N69TP | Mcdonnell Douglas Helicopter 500N |
Rotorcraft | Airtime Marketing LLC Middletown, Delaware |
Standard | 2024-10-17 | ValidFAA registration status code V: Valid registration. All codes |
| N183TC | Bell 206B |
Rotorcraft | Individual owner Minnesota |
Restricted | 2024-10-07 | ValidFAA registration status code V: Valid registration. All codes |
| N41PH | Bell 206B |
Rotorcraft | Individual owner Alaska |
Standard | 2024-10-01 | ValidFAA registration status code V: Valid registration. All codes |
| N165JK | Bell 206B |
Rotorcraft | Bohica Consulting Services of Nevada INC Boulder City, Nevada |
Standard | 2024-09-28 | ValidFAA registration status code V: Valid registration. All codes |
| N212EL | Hughes Helicopters Inc HUGHES 369D |
Rotorcraft | Mark Mondo Building & Excavating INC Reno, Ohio |
Restricted | 2024-09-16 | ValidFAA registration status code V: Valid registration. All codes |
| N67656 | Bell 206B |
Rotorcraft | Lenox Oil INC Lenox, Michigan |
Standard | 2024-08-18 | ValidFAA registration status code V: Valid registration. All codes |
| N75454 | Bell 206B |
Rotorcraft | Realstaff Rocket LLC Salem, Oregon |
Standard | 2024-08-16 | ValidFAA registration status code V: Valid registration. All codes |
| N21507 | Bell 206B |
Rotorcraft | Steuben Foods INC Elma, New York |
Standard | 2024-06-28 | ValidFAA registration status code V: Valid registration. All codes |
| N500SY | Mcdonnell Douglas Helicopter 369E |
Rotorcraft | Nalas INC Trustee Wilmington, Delaware |
Standard | 2024-06-20 | ValidFAA registration status code V: Valid registration. All codes |
| N206DG | Bell 206B |
Rotorcraft | Sierra Papa Aviation LLC Holdrege, Nebraska |
Standard | 2024-06-11 | ValidFAA registration status code V: Valid registration. All codes |
| N508PH | Mcdonnell Douglas Helicopter 369E |
Rotorcraft | Apex Heli-Support LLC Phoenix, Arizona |
Restricted | 2024-06-10 | ValidFAA registration status code V: Valid registration. All codes |
| N60PH | Bell 206B |
Rotorcraft | Top Gun Aviation LLC Wendell, Idaho |
Standard | 2024-06-10 | ValidFAA registration status code V: Valid registration. All codes |
| N299DR | Hughes Helicopters Inc 369E |
Rotorcraft | Kings County Sheriffs Office Hanford, California |
Standard | 2024-06-06 | ValidFAA registration status code V: Valid registration. All codes |
| N996TV | Bell 206B |
Rotorcraft | Topside Aviation INC Brasstown, North Carolina |
Standard | 2024-05-29 | ValidFAA registration status code V: Valid registration. All codes |
| N74AJ | Bell 206B |
Rotorcraft | Aerial Control INC Brentwood, California |
Multiple | 2024-05-05 | ValidFAA registration status code V: Valid registration. All codes |
| N62EH | Bell 206B |
Rotorcraft | Juliett Tango LLC Alpine, Wyoming |
Standard | 2024-05-01 | ValidFAA registration status code V: Valid registration. All codes |
| N63888 | Bell 206B-III |
Rotorcraft | Co-owned owner Arizona |
Standard | 2024-04-12 | ValidFAA registration status code V: Valid registration. All codes |
| N543CC | Bell 206B |
Rotorcraft | Bighorn Flying CO LLC Wood River, Nebraska |
Restricted | 2024-04-11 | ValidFAA registration status code V: Valid registration. All codes |
| N206SA | Bell 206B |
Rotorcraft | Individual owner Montana |
Standard | 2024-03-14 | ValidFAA registration status code V: Valid registration. All codes |
| N360JF | Schweizer 269D |
Rotorcraft | Ct Grain Systems LLC Lewisburg, Kentucky |
Standard | 2024-03-14 | ValidFAA registration status code V: Valid registration. All codes |
| N1219W | Bell 206B |
Rotorcraft | Moes Crop Dusting Service INC Marysville, California |
Restricted | 2024-03-11 | ValidFAA registration status code V: Valid registration. All codes |
| N50AP | Hughes Helicopters Inc HUGHES 369D |
Rotorcraft | Bank of Utah Trustee Salt Lake City, Utah |
Multiple | 2024-03-11 | ValidFAA registration status code V: Valid registration. All codes |
| N801SB | Mcdonnell Douglas Helicopter 369E |
Rotorcraft | Bank of Utah Trustee Salt Lake City, Utah |
Standard | 2024-03-08 | ValidFAA registration status code V: Valid registration. All codes |
| N8371F | Mcdonnell Douglas Helicopter 369E |
Rotorcraft | Bank of Utah Trustee Salt Lake City, Utah |
Standard | 2024-03-08 | ValidFAA registration status code V: Valid registration. All codes |
| N8373F | Mcdonnell Douglas Helicopter 369E |
Rotorcraft | I T A Services LLC Westminster, Maryland |
Standard | 2024-03-07 | 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 5, 2026. Horsepower and thrust are the FAA's figures for the series, not for a particular aircraft.