landing gear transition on takeoff

[Roger]

As I mentioned before, just go buy some electric cleaner and spray the switches yourself. Blow them off with air.

I don't know this for a fact but I have always felt that the reason the doors might close on jacks vs in the air, is because in flight when the doors are open they probably create a bit of a vacuum in the area of the gear bays.

This negative pressure could be drawing the gear back out/down and away from the locks util the doors are closed. Of course if the gear doesn't seat well enough to activate the switches, the doors will never close, therein aggravating the problem.

Just a thought on why it may only happen in the air.