Allison (Rolls-Royce) 250-C20
54 aircraft on the U.S. register carry an Allison (Rolls-Royce) 250-C20 engine, rated at about 400 horsepower. The Bell 206 JetRanger and LongRanger is the model most often fitted with it (35 aircraft). The aircraft carrying it were built between 1963 and 2001.
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. FAA spelling: 250-C20.
Fitted to model families
Bell 206 JetRanger and LongRanger35Hughes 369 500 series helicopters5Mcdonnell Douglas Helicopter 3695Md Helicopters Inc 3693Aerospatiale AS-3551Bell 471Hughes Helicopters Inc 3691Hughes Helicopters Inc HUGHES 3691Mcdonnell Douglas Helicopter 5001Messerschmitt-Boelkow-Blohm-Gm BO-105C1
Model families, as a table
Bell 206 JetRanger and LongRanger · Hughes 369 500 series helicopters · Mcdonnell Douglas Helicopter 369 · Md Helicopters Inc 369 · Aerospatiale AS-355 · Bell 47 · Hughes Helicopters Inc 369 · Hughes Helicopters Inc HUGHES 369 · Mcdonnell Douglas Helicopter 500 · Messerschmitt-Boelkow-Blohm-Gm BO-105C
Where they are owner's state
What the FAA has certified, ordered and been told about the Allison (Rolls-Royce) 250-C20 the component layer
No FAA order in the current files names this engine series. Operators and repair shops have filed 945 failure reports with the FAA since 1995, 8 of them in the last ten years.
Failure reports 945 since · what operators and shops told the FAA
Failure reports by year, as a table
| reports | |
|---|---|
| 95 | 28 |
| 96 | 121 |
| 97 | 99 |
| 98 | 92 |
| 99 | 64 |
| 00 | 50 |
| 01 | 60 |
| 02 | 71 |
| 03 | 63 |
| 04 | 67 |
| 05 | 53 |
| 06 | 17 |
| 07 | 31 |
| 08 | 25 |
| 09 | 13 |
| 10 | 24 |
| 11 | 14 |
| 12 | 13 |
| 13 | 9 |
| 14 | 7 |
| 15 | 12 |
| 16 | 4 |
| 17 | 1 |
| 19 | 4 |
| 20 | 1 |
| 21 | 1 |
| 26 | 1 |
Parts most often reported as the reports name them
Parts most reported, as a table
| reports | |
|---|---|
| Governor | 61 |
| Bearing | 51 |
| Blade | 27 |
| Fcu | 27 |
| Fuel Control | 25 |
| Nozzle | 20 |
| Seal | 20 |
| Shaft | 20 |
| Engine | 19 |
| Pump | 19 |
Latest reports
2026-05-28Lock Nut: failed
2021-07-19Control Unit: malfunctioned
2020-05-26Duct: loose
2019-11-19Engine: making metal
2019-06-29Gyro: faulty
Approved replacement parts 225 parts manufacturer approvals
Parts a company other than the maker may make for this engine and sell as FAA-approved. The companies holding the most:
Pacific Sky Supply INC 137Superior Air Parts INC 45Timken Alcor Aerospace Technologies INC 14Hye-Tech Manufacturing LLC 12Honeywell International INC 7Extex LTD 2Western Filter Corporation 1Purolator Facet INC (Formerly Facet Filter Products) 1
Most often: seal (19), gasket (19), ring (13), nozzle (11), tube (9), gearshaft (9), cage (8), shim (7), nut (7), bushing (5).
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 35 with this engine series
- Hughes 369 500 series helicopters 5 with this engine series
- Mcdonnell Douglas Helicopter 369 5 with this engine series
- Md Helicopters Inc 369 3 with this engine series
- Aerospatiale AS-355 1 with this engine series
- Bell 47 1 with this engine series
- Hughes Helicopters Inc 369 1 with this engine series
- Hughes Helicopters Inc HUGHES 369 1 with this engine series
Where they are
- Florida 6 of these aircraft
- California 5 of these aircraft
- Texas 4 of these aircraft
- Oregon 4 of these aircraft
- Nevada 4 of these aircraft
Biggest operators
- Southmark Aviation INC 3 of these aircraft
- Scotts Helicopter Services INC 2 of these aircraft
- International Air Services INC Trustee 2 of these aircraft
- Agricultural Air Services LLC 2 of these aircraft
- Winco INC 1 of these aircraft
Airworthiness
- Failure reports on the Allison (Rolls-Royce) 250-C20 945 reports since 1995
Analytics
The whole map of how records connect · these connections as data: /graph/engine/allison-rolls-royce-250-c20.json.
Aircraft newest certificates first · 54
| Tail no. | Maker and model | Group | Owner and base | Certificate | Registered | Status |
|---|---|---|---|---|---|---|
| N500EK | Hughes Helicopters Inc HUGHES 369D |
Rotorcraft | Kar Aviation LLC Saltville, Virginia |
Multiple | 2026-09-28 | ValidFAA registration status code V: Valid registration. All codes |
| N6BU | Bell 206B |
Rotorcraft | Agricultural Air Services LLC Jupiter, Florida |
Multiple | 2026-09-28 | ValidFAA registration status code V: Valid registration. All codes |
| N865HS | Hughes 369HS |
Rotorcraft | Royal Helicopter Services LLC Exeter, California |
Standard | 2026-05-26 | ValidFAA registration status code V: Valid registration. All codes |
| N346ER | Bell 206B |
Rotorcraft | Cibaoair Aviation Group INC Middletown, Delaware |
Standard | 2026-05-07 | ValidFAA registration status code V: Valid registration. All codes |
| N101DG | Bell 206B |
Rotorcraft | Summit Helicopters INC Salem, Virginia |
Standard | 2026-05-05 | ValidFAA registration status code V: Valid registration. All codes |
| N818HH | Bell 206B |
Rotorcraft | Hermanns Helicopters LLC Arlington, Washington |
Standard | 2026-04-30 | ValidFAA registration status code V: Valid registration. All codes |
| N206NA | Bell 206B |
Rotorcraft | International Air Services INC Trustee Carson City, Nevada |
Standard | 2026-01-20 | ValidFAA registration status code V: Valid registration. All codes |
| N206DD | Bell 206B |
Rotorcraft | International Air Services INC Trustee Carson City, Nevada |
Standard | 2025-12-02 | ValidFAA registration status code V: Valid registration. All codes |
| N106JC | Bell 206B |
Rotorcraft | Trans Peco Aviation LLC Fort Stockton, Texas |
Multiple | 2025-11-26 | ValidFAA registration status code V: Valid registration. All codes |
| N369PD | Md Helicopters Inc 369FF |
Rotorcraft | City of Atlanta Atlanta, Georgia |
Experimental | 2025-08-26 | ValidFAA registration status code V: Valid registration. All codes |
| N8VU | Bell 206B |
Rotorcraft | Owen Aviation Services LLC Dallas Center, Iowa |
Multiple | 2025-06-26 | ValidFAA registration status code V: Valid registration. All codes |
| N16EY | Mcdonnell Douglas Helicopter 369E |
Rotorcraft | Carleton INC Trustee Wilmington, Delaware |
Standard | 2025-06-25 | ValidFAA registration status code V: Valid registration. All codes |
| N369HS | Hughes 369HS |
Rotorcraft | Co-owned owner California |
Standard | 2025-06-16 | ValidFAA registration status code V: Valid registration. All codes |
| N501MD | Mcdonnell Douglas Helicopter 369E |
Rotorcraft | Agricultural Air Services LLC Jupiter, Florida |
Standard | 2025-04-14 | ValidFAA registration status code V: Valid registration. All codes |
| N122J | Bell 206B |
Rotorcraft | Lotus Aviation LLC Boring, Oregon |
Standard | 2025-03-05 | ValidFAA registration status code V: Valid registration. All codes |
| N355TH | Aerospatiale AS 355F1 |
Rotorcraft | Timberland Helicopters INC Ashland, Oregon |
Standard | 2025-02-16 | ValidFAA registration status code V: Valid registration. All codes |
| N828HK | Mcdonnell Douglas Helicopter 369E |
Rotorcraft | Hawkeye Helicopter LLC Lyndon, Kansas |
Standard | 2024-12-26 | ValidFAA registration status code V: Valid registration. All codes |
| N500HJ | Mcdonnell Douglas Helicopter 369E |
Rotorcraft | 392E INC Trustee Wilmington, Delaware |
Standard | 2024-11-14 | ValidFAA registration status code V: Valid registration. All codes |
| N827WA | Bell 206B |
Rotorcraft | Warner Alan/Whiskey Alpha LLC Fort Worth, Texas |
Standard | 2024-09-04 | ValidFAA registration status code V: Valid registration. All codes |
| N2751A | Bell 206B |
Rotorcraft | Collective Aviation Services Orient, Iowa |
Multiple | 2024-05-30 | ValidFAA registration status code V: Valid registration. All codes |
| N868H | Bell 206L-3 |
Rotorcraft | Weyerhaeuser Nr CO Seattle, Washington |
Multiple | 2024-04-05 | ValidFAA registration status code V: Valid registration. All codes |
| N9902K | Bell 206B |
Rotorcraft | Southmark Aviation INC Hattiesburg, Mississippi |
Restricted | 2024-04-03 | ValidFAA registration status code V: Valid registration. All codes |
| N2295F | Bell 206B |
Rotorcraft | Norgrain Helicopters LLC Hattiesburg, Mississippi |
Multiple | 2024-02-26 | ValidFAA registration status code V: Valid registration. All codes |
| N805MD | Hughes Helicopters Inc 369E |
Rotorcraft | Integrity Aircaft Title Holdings LLC Portland, Oregon |
Standard | 2023-12-08 | ValidFAA registration status code V: Valid registration. All codes |
| N4042G | Bell 206A |
Rotorcraft | Klein Flying Service INC Lawrenceville, Illinois |
Restricted | 2023-08-15 | ValidFAA registration status code V: Valid registration. All codes |
| N67882 | Bell 206B |
Rotorcraft | Mf Helicopters LLC Troy, Wisconsin |
Restricted | 2023-07-07 | ValidFAA registration status code V: Valid registration. All codes |
| N91WS | Bell 206B |
Rotorcraft | Sunny Sky LLC Stacyville, Iowa |
Multiple | 2023-06-28 | ValidFAA registration status code V: Valid registration. All codes |
| N537ST | Mcdonnell Douglas Helicopter 369E |
Rotorcraft | J&J Holdings and Investments LLC Phoenix, Arizona |
Standard | 2023-04-28 | ValidFAA registration status code V: Valid registration. All codes |
| N74678 | Bell 206B |
Rotorcraft | Southmark Aviation INC Hattiesburg, Mississippi |
Restricted | 2022-11-18 | ValidFAA registration status code V: Valid registration. All codes |
| N111HF | Bell 206B |
Rotorcraft | Plane Fun INC Tr Trustee Snellville, Georgia |
Standard | 2022-09-12 | ValidFAA registration status code V: Valid registration. All codes |
| N200VB | Bell 206B |
Rotorcraft | Vertical Vegetation Management LLC Darlington, Indiana |
Restricted | 2022-05-23 | ValidFAA registration status code V: Valid registration. All codes |
| N530RR | Bell 206B |
Rotorcraft | Vertical Access Helicopters LLC Clermont, Florida |
Standard | 2022-05-19 | ValidFAA registration status code V: Valid registration. All codes |
| N911AN | Messerschmitt-Boelkow-Blohm-Gm BO-105C |
Rotorcraft | Alaska Tactical Aviation LLC Palmer, Alaska |
Standard | 2021-11-04 | ValidFAA registration status code V: Valid registration. All codes |
| N520HS | Mcdonnell Douglas Helicopter 500N |
Rotorcraft | Hfn Investments LLC Birmingham, Alabama |
Standard | 2021-07-27 | ValidFAA registration status code V: Valid registration. All codes |
| N6295P | Hughes 369HS |
Rotorcraft | Caribe Helicopters INC Coral Gables, Florida |
Standard | 2021-05-28 | ValidFAA registration status code V: Valid registration. All codes |
| N67599 | Bell 206B |
Rotorcraft | Southmark Aviation INC Hattiesburg, Mississippi |
Restricted | 2021-05-19 | ValidFAA registration status code V: Valid registration. All codes |
| N844AD | Bell 206B-III |
Rotorcraft | Ocean Air Helicopter INC Valley Center, California |
Restricted | 2021-02-19 | ValidFAA registration status code V: Valid registration. All codes |
| N3192G | Bell 206B |
Rotorcraft | 3192 Golf INC Wauchula, Florida |
Standard | 2020-12-30 | ValidFAA registration status code V: Valid registration. All codes |
| N224KM | Bell 206B |
Rotorcraft | Individual owner Missouri |
Restricted | 2020-12-14 | ValidFAA registration status code V: Valid registration. All codes |
| N509CG | Md Helicopters Inc 369HS |
Rotorcraft | Cgck Holdings LLC Henderson, Nevada |
Standard | 2020-07-13 | ValidFAA registration status code V: Valid registration. All codes |
| N222HA | Bell 206B |
Rotorcraft | Jasons Helicopter Services New Prague, Minnesota |
Multiple | 2019-12-17 | ValidFAA registration status code V: Valid registration. All codes |
| N40MC | Bell 206B |
Rotorcraft | Scotts Helicopter Service Le Sueur, Minnesota |
Multiple | 2019-12-13 | ValidFAA registration status code V: Valid registration. All codes |
| N407RV | Bell 206B |
Rotorcraft | Helicopter Services of Illinois LLC Fisher, Illinois |
Restricted | 2017-10-10 | ValidFAA registration status code V: Valid registration. All codes |
| N3051Q | Hughes 369HS |
Rotorcraft | Charlie Helicopter Company LLC Sierra Blanca, Texas |
Standard | 2017-05-01 | ValidFAA registration status code V: Valid registration. All codes |
| N14837 | Bell 206B |
Rotorcraft | Oscar Aerial Spraying LLC Grady, Oklahoma |
Multiple | 2014-02-24 | ValidFAA registration status code V: Valid registration. All codes |
| N283XL | Bell 206B |
Rotorcraft | Thiel Air Care INC Chowchilla, California |
Multiple | 2014-02-06 | ValidFAA registration status code V: Valid registration. All codes |
| N806LA | Bell 206B |
Rotorcraft | Coastal Helicopters INC Panama City, Florida |
Standard | 2013-12-23 | ValidFAA registration status code V: Valid registration. All codes |
| N32KY | Bell 206B |
Rotorcraft | English Air Service LLC Santa Maria, California |
Multiple | 2010-12-21 | ValidFAA registration status code V: Valid registration. All codes |
| N677RS | Hughes 369HS |
Rotorcraft | Irriscape Construction Nevada INC Las Vegas, Nevada |
Standard | 2009-07-15 | ValidFAA registration status code V: Valid registration. All codes |
| N170SS | Bell 47G-3B-1 |
Rotorcraft | Olathe Spray Service INC Olathe, Colorado |
Standard | 2006-09-13 | ValidFAA registration status code V: Valid registration. All codes |
| N43142 | Bell 206B |
Rotorcraft | Scotts Helicopter Services INC Le Sueur, Minnesota |
Restricted | 2005-12-29 | ValidFAA registration status code V: Valid registration. All codes |
| N9014Q | Bell 206B |
Rotorcraft | Scotts Helicopter Services INC Le Sueur, Minnesota |
Multiple | 2005-10-27 | ValidFAA registration status code V: Valid registration. All codes |
| N520WH | Md Helicopters Inc 369FF |
Rotorcraft | Winco INC Aurora, Oregon |
Standard | 1995-11-17 | ValidFAA registration status code V: Valid registration. All codes |
| N2297E | Bell 206B |
Rotorcraft | Westwind Helicopters INC Santa Fe, Texas |
Multiple | 1994-04-12 | ValidFAA registration status code V: Valid registration. All codes |
Source: FAA Civil Aviation Registry, Releasable Aircraft Database (the engine reference table and each aircraft's engine code), October 9, 2026. Horsepower and thrust are the FAA's figures for the series, not for a particular aircraft.