Originally Posted by
ManaAdaSystem
Amazing! We got to post 120 before somebody made this suggestion! Cameras, cabin crew, ATC. Just open the window and look outside! Even if you can’t see the whole engine, you would see the smoke.
I agree with the take a look through the open window idea. But, if only part of the engine is in view, I wouldn't want to make a big bet that not seeing any smoke guaranteed that there actually was no smoke depending on the wind conditions. And the wind is more often than not, blowing toward the tail and away from view when on the runway.