Hi all.
I'm at last in the right place!
Thanks for the welcome!
I'll start with a tricky one - from my layman's optic though.
Are intermixed engines operations a common practice in the US? Worldwide?
Under whose approval or regulations?
Manufacturers?
Do airplanes have built in provitions for this conditions?
Experimental? On active passanger carriers?
Heavy burden to count the Q's you experts surely would dig out.
One last thought: might it be common practice in some forgoten regions far from aviation regulation agencies/authorities?
Thanks anticipated.
WannEDbe