Halhio
I was adding a bit of power at the time. Could it be something to do with an FCU and governor over response pumping a quick burst of too much fuel? I don't know if that even is possible.
Ive read that a dirty fuel nozzle will cause an occasional burst of smoke in turbines but I don't know if this applies to rr250s. I'm hoping its not a recurring burst of oil leakage issue.