When operating this aeroplane 40 years ago (when they were brand new directly from the factory), the AFM was thus...
Normal takeoffs.....flaps 10
STOL takeoffs.......flaps 30
As for power reductions, flaps up first, then power reduction.
We did have one line pilot who insisted on using zero flaps for takeoff, reasoning that if an engine were to fail, the best engine out ROC was with flaps up.
He was quite right of course, but this resulted in rather long (for the aeroplane) takeoff runs, which scared the heck out of the passengers, especially those with window seats watching the boundry fence at the far end of the rather short runway...
