Allison (Rolls-Royce) 250-C20B
113 aircraft on the U.S. register carry an Allison (Rolls-Royce) 250-C20B engine, rated at about 420 horsepower. The Bell 206 JetRanger and LongRanger is the model most often fitted with it (50 aircraft). The aircraft carrying it were built between 1969 and 2009.
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-C20B. FAA spelling: 250-C20B.
Fitted to model families
Model families, as a table
Bell 206 JetRanger and LongRanger · Hughes Helicopters Inc HUGHES 369 · Messerschmitt-Bolkow-Blohm Gmb BO-105 · Mcdonnell Douglas Helicopter 369 · Hughes Helicopters Inc 369 · Hughes 369 500 series helicopters · Messerschmitt-Bolkow-Blohm BO 105 · Agusta Bell AB206 C1 · Agusta Spa A109 · Garlick Helicopters Inc OH-58
Where they are owner's state
What the FAA has certified, ordered and been told about the Allison (Rolls-Royce) 250-C20B the component layer
No FAA order in the current files names this engine series. Operators and repair shops have filed 1,981 failure reports with the FAA since 1995, 41 of them in the last ten years.
Failure reports 1,981 since · what operators and shops told the FAA
Failure reports by year, as a table
| reports | |
|---|---|
| 95 | 115 |
| 96 | 249 |
| 97 | 169 |
| 98 | 156 |
| 99 | 188 |
| 00 | 92 |
| 01 | 107 |
| 02 | 126 |
| 03 | 130 |
| 04 | 102 |
| 05 | 99 |
| 06 | 74 |
| 07 | 47 |
| 08 | 36 |
| 09 | 48 |
| 10 | 38 |
| 11 | 41 |
| 12 | 32 |
| 13 | 33 |
| 14 | 17 |
| 15 | 23 |
| 16 | 18 |
| 17 | 4 |
| 18 | 8 |
| 19 | 13 |
| 21 | 4 |
| 22 | 3 |
| 23 | 2 |
| 24 | 6 |
| 26 | 1 |
Parts most often reported as the reports name them
Parts most reported, as a table
| reports | |
|---|---|
| Governor | 131 |
| Bearing | 120 |
| Nozzle | 90 |
| Blade | 72 |
| Engine | 54 |
| Fuel Control | 49 |
| Wheel | 44 |
| Gearbox | 36 |
| Seal | 32 |
| Coupling | 28 |
Latest reports
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
- Bell 206 JetRanger and LongRanger 50 with this engine series
- Hughes Helicopters Inc HUGHES 369 35 with this engine series
- Messerschmitt-Bolkow-Blohm Gmb BO-105 6 with this engine series
- Mcdonnell Douglas Helicopter 369 5 with this engine series
- Hughes Helicopters Inc 369 3 with this engine series
- Hughes 369 500 series helicopters 2 with this engine series
- Messerschmitt-Bolkow-Blohm BO 105 2 with this engine series
- Agusta Spa A109 1 with this engine series
- Delaware 10 of these aircraft
- Florida 9 of these aircraft
- Oregon 7 of these aircraft
- California 7 of these aircraft
- Texas 5 of these aircraft
- Dah Aircraft LLC 3 of these aircraft
- Vertol Systems Company INC 2 of these aircraft
- Southern Aircraft Consultancy INC Trustee 2 of these aircraft
- Quicksilver Air INC 2 of these aircraft
- Jack Harter Helicopters INC 2 of these aircraft
- Failure reports on the Allison (Rolls-Royce) 250-C20B 1,981 reports since 1995
These connections as data: /graph/engine/allison-rolls-royce-250-c20b.json · about the eFlight graph.
Aircraft newest certificates first · 113
| Tail no. | Maker and model | Group | Owner and base | Certificate | Registered | Status |
|---|---|---|---|---|---|---|
| N7079K | Hughes Helicopters Inc HUGHES 369D |
Rotorcraft | Dah Aircraft LLC Georgetown, South Carolina |
Standard | 2011-04-06 | ValidFAA registration status code V: Valid registration. All codes |
| N519PA | Hughes Helicopters Inc HUGHES 369D |
Rotorcraft | Patriot Aviation INC Greenville, Delaware |
Standard | 2010-09-09 | ValidFAA registration status code V: Valid registration. All codes |
| N454JH | Mcdonnell Douglas Helicopter 369E |
Rotorcraft | Jack Harter Helicopters INC Lihue, Hawaii |
Standard | 2010-04-22 | ValidFAA registration status code V: Valid registration. All codes |
| N501RM | Md Helicopters Inc 369E |
Rotorcraft | City of Pasadena Pasadena, California |
Standard | 2010-03-11 | ValidFAA registration status code V: Valid registration. All codes |
| N56AL | Bell 206B |
Rotorcraft | Board of County Commissioners Bartow, Florida |
Standard | 2009-02-23 | ValidFAA registration status code V: Valid registration. All codes |
| N16810 | Bell 206B |
Rotorcraft | Southern Helicopter Services INC Millington, Tennessee |
Restricted | 2008-06-19 | ValidFAA registration status code V: Valid registration. All codes |
| N145AL | Hughes Helicopters Inc HUGHES 369D |
Rotorcraft | Quicksilver Air INC Fairbanks, Alaska |
Standard | 2008-02-15 | ValidFAA registration status code V: Valid registration. All codes |
| N198H | Bell 206B |
Rotorcraft | Industrial Helicopters LLC Lafayette, Louisiana |
Standard | 2007-03-19 | ValidFAA registration status code V: Valid registration. All codes |
| N137M | Bell 206B |
Rotorcraft | Scotts Helicopter Services INC Le Sueur, Minnesota |
Restricted | 2006-05-08 | ValidFAA registration status code V: Valid registration. All codes |
| N2299U | Bell 206B |
Rotorcraft | Cb Couch INC Walcott, Arkansas |
Restricted | 2006-04-25 | ValidFAA registration status code V: Valid registration. All codes |
| N369TR | Hughes Helicopters Inc HUGHES 369D |
Rotorcraft | Chehalem Helicopters LLC Newberg, Oregon |
Standard | 2006-04-25 | ValidFAA registration status code V: Valid registration. All codes |
| N5TC | Bell 206B |
Rotorcraft | City of Atlanta Atlanta, Georgia |
Standard | 1987-05-07 | ValidFAA registration status code V: Valid registration. All codes |
| N86FW | Bell 206B |
Rotorcraft | Florida Fish & Wildlife Conservation Commission Lakeland, Florida |
Experimental | 1985-09-16 | 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 7, 2026. Horsepower and thrust are the FAA's figures for the series, not for a particular aircraft.