Allison (Rolls-Royce) 250-C28B
5 aircraft on the U.S. register carry an Allison (Rolls-Royce) 250-C28B engine, rated at about 500 horsepower. The Bell 206 JetRanger and LongRanger is the model most often fitted with it (5 aircraft). The aircraft carrying it were built between 1979 and 1980.
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-C28B. FAA spelling: 250-C28B.
Fitted to model families
Model families, as a table
| aircraft | |
|---|---|
| Bell 206 JetRanger and LongRanger | 5 |
Where they are owner's state
What the FAA has certified, ordered and been told about the Allison (Rolls-Royce) 250-C28B the component layer
No FAA order in the current files names this engine series. Operators and repair shops have filed 286 failure reports with the FAA since 1995, 8 of them in the last ten years.
Failure reports 286 since · what operators and shops told the FAA
Failure reports by year, as a table
| reports | |
|---|---|
| 95 | 31 |
| 96 | 33 |
| 97 | 37 |
| 98 | 38 |
| 99 | 24 |
| 00 | 6 |
| 01 | 7 |
| 02 | 12 |
| 03 | 19 |
| 04 | 13 |
| 05 | 23 |
| 06 | 8 |
| 07 | 9 |
| 08 | 7 |
| 09 | 4 |
| 10 | 6 |
| 11 | 1 |
| 12 | 2 |
| 13 | 2 |
| 14 | 2 |
| 15 | 1 |
| 21 | 1 |
Parts most often reported as the reports name them
Parts most reported, as a table
| reports | |
|---|---|
| Nozzle | 26 |
| Wheel | 17 |
| Gearshaft | 10 |
| Bearing | 8 |
| Carbon Seal | 8 |
| Governor | 8 |
| Fuel Control | 7 |
| Pump | 7 |
| Scroll | 7 |
| Actuator | 6 |
Latest reports
Approved replacement parts 15 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:
Most often: nozzle (2), key (2), gasket (2), valve poppet (1), valve (1), spark igniter (1), ring (1), plate (1), igniter lead (1), igniter (1).
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 5 with this engine series
- Timberland Helicopters INC 1 of these aircraft
- Air Evac Ems INC 1 of these aircraft
- Agricultural Air Services LLC 1 of these aircraft
- Failure reports on the Allison (Rolls-Royce) 250-C28B 286 reports since 1995
The whole map of how records connect · these connections as data: /graph/engine/allison-rolls-royce-250-c28b.json.
Aircraft newest certificates first · 5
| Tail no. | Maker and model | Group | Owner and base | Certificate | Registered | Status |
|---|---|---|---|---|---|---|
| N52PL | Bell Helicopter Textron 206L-1 |
Rotorcraft | Paratus Air DBA Auburn, Indiana |
Standard | 2026-08-19 | ValidFAA registration status code V: Valid registration. All codes |
| N249TH | Bell Helicopter Textron 206L-1 |
Rotorcraft | Timberland Helicopters INC Ashland, Oregon |
Standard | 2023-06-29 | ValidFAA registration status code V: Valid registration. All codes |
| N76DC | Bell Helicopter Textron 206L-1 |
Rotorcraft | Advanced Trucking LLC Kalispell, Montana |
Standard | 2023-03-02 | ValidFAA registration status code V: Valid registration. All codes |
| N1171 | Bell Helicopter Textron 206L-1 |
Rotorcraft | Agricultural Air Services LLC Jupiter, Florida |
Standard | 2017-09-27 | ValidFAA registration status code V: Valid registration. All codes |
| N395AE | Bell Helicopter Textron 206L-1 |
Rotorcraft | Air Evac Ems INC O Fallon, Missouri |
Multiple | 2009-08-03 | 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 12, 2026. Horsepower and thrust are the FAA's figures for the series, not for a particular aircraft.