landing gear transition on takeoff

[rmorris]

Originally Posted by 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.

I had him clean the switches today, don't think he used electrical cleaner but some sort of solvent, then saw him blow them off and check with an ohmeter. said the switches were fine, but I went back and test flew - same symptom.

So, not sure it's not the switches, but don't think so on the door switches (mains and nose). He visually examind the microswitch on the powerpack last week, but not sure he did much else on that one - my money is there, since it seems to match previous posts as a culprit, and one of the few things not touched yet.
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