Originally Posted by
gulliBell
I'm still suspicious about that smoke...perhaps caused by oil momentarily getting past a labyrinth seal and burning in the hot engine? I'm not familiar with that particular engine, but it does look unusual.
The smoke coming from the engine is nothing to be concerned about, if engineers got twitchy every time we saw a start with white smoke, none of us would ever go flying! It's too thick and too soon in the start cycle to be oil, it is almost certainly fuel - perhaps unburnt from the last shutdown being kicked out, or a small purge coming through prior to the ignitors cracking off, but most certainly not an issue to flight safety