Hello everyone! I hope the waiting isn’t too hard !
Recently, I have been chatting with Nick from Black Square. He was enthusiastic to announce a new feature that is not yet mentioned in Duke Turbine product page, but we can expect to see it for the Turbine Duke.
Here what we may found in the futur manual 
"Foreign Object Debris Damage
This aircraft simulates damage caused to turbine engines by the ingestion of particulate matter, better known as foreign object debris, or “FOD”. FOD can include dust, sand, gravel, ice, etc., and is typically associated with operating on unimproved runways. The amount of damage caused by the FOD is calculated based on which of the 25 recognizable surface types the aircraft is currently operating on, the thrust of the propellers, and the position of the inertial separator vanes. In order to prevent damage, be sure to use the inertial separators whenever operating on unimproved surfaces, including all ground operations, and whenever ice is present."
The idea showed up when @hobanagerik mentioned FOD (Foreign Object Debris) in the Analog C208 thread, pointing out how great it would be if the inertial separator could be more useful in the sim than what it’s actually …
So, Nick reached me out to first thank him for mentionning this idea, and he was thinking of implementing this kind of failures. Today, it became official!
He also told me that we can expect to see this in all subsequent turbine engine products and updates !
but I m sure we will have something similar to a bundle or second buy with a discount