Normal takeoff is flaps zero in a King Air 200
Sure ? The 40% position is called "Takeoff and Approach" acc. to Beech (checklist) and FSI one would use flaps 40% for normal takeoffs...
This bird wasn´t Raisbecked...fitted with the Rausbeck Kit, no flaps T/Os are the norm.
If someone checked th static systems for water ( by opening the drain valves by the right hand seat) and left them open, you would get decaying airspeed and altitude indications as the cabin started to pressurize after the squat switches went to 'air'.
Thats a maintenance function, thus it should be documented...
On a side note, many years ago our hangar neighbor had found a nice little yellow plastic cap fitted to the alternate source opening in the hellhole of his B200 after maintenance... would have been "interesting" if the alternate source would have been needed.