[stackj]

I am attaching a scanned diagram given to me by a friend. This looks like part of a text from some mechanics school who teaches Skymaster systems, but I can't find any reference on this package to either ask permission or credit them. Anyway, I'm chancing making this available because it is a much simplified diagram of the gear door permissive systems... Here it is. When you zoom in on the picture the text is more readable.

The Key to remember. If power is off at the Landing Gear Door Solenoid and Hydraulic pressure is applied, the doors will open.
If power is on at the same solenoid and hydraulic pressure is applied, the doors will close.