Allison (Rolls-Royce) 250-C40B
1 aircraft on the U.S. register carry an Allison (Rolls-Royce) 250-C40B engine, rated at about 715 horsepower. The Bell 430 is the model most often fitted with it (1 aircraft).
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-C40B. FAA spelling: 250-C40B.
What the FAA has certified, ordered and been told about the Allison (Rolls-Royce) 250-C40B the component layer
No FAA order in the current files names this engine series. Operators and repair shops have filed 87 failure reports with the FAA since 1995, 28 of them in the last ten years.
Failure reports 87 since · what operators and shops told the FAA
Failure reports by year, as a table
| reports | |
|---|---|
| 98 | 3 |
| 99 | 1 |
| 00 | 1 |
| 01 | 8 |
| 02 | 5 |
| 03 | 6 |
| 04 | 3 |
| 05 | 8 |
| 06 | 6 |
| 07 | 4 |
| 08 | 6 |
| 09 | 8 |
| 10 | 4 |
| 11 | 2 |
| 12 | 3 |
| 13 | 5 |
| 14 | 1 |
| 15 | 7 |
| 16 | 2 |
| 18 | 3 |
| 19 | 1 |
Parts most often reported as the reports name them
Parts most reported, as a table
| reports | |
|---|---|
| Bearing | 5 |
| Blade | 5 |
| Control Tube | 5 |
| Engine | 5 |
| Filter | 4 |
| Hydromech Unit | 4 |
| Stud | 3 |
| Warning Message | 3 |
| Wire | 3 |
| Bleed Valve | 2 |
Latest reports
Approved replacement parts 21 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: filter (10), emc ecu (4), filter element (2), nozzle (1), fuel flow (1), emc hmu (1), doubler (1), conical seal (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 430 1 with this engine series
- Texas 1 of these aircraft
- Failure reports on the Allison (Rolls-Royce) 250-C40B 87 reports since 1995
The whole map of how records connect · these connections as data: /graph/engine/allison-rolls-royce-250-c40b.json.
Aircraft newest certificates first · 1
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.