bose-x, interested in your incident.
One or two questions...
At what point did you notice the #1 engine wasn't up to full power?
Which Dornier is this? What engines?
Is normal procedure on your aircraft not to advance power levers to a mid-position, pause to allow to stabilise and then advance fully?
Is this single or two-crew?
Any autofeather facility on the aircraft?
Any hint from a hangar as to the reason for the lack of spool-up?