If FSX users have "TrafficToolBox" (TTB) enabled - it's an add-on tool in the SDK that displays the flight parameters of AI aircraft in the vicinity of the user - so much the better, but they can still help if it's not.
This is a link to a very simple test package containing a single HS-Andover, a test airfield strip and a test traffic file:
https://btcloud.bt.com/web/app/share/invite/12dSuRTfn9
All we need you to do is install the 3 components from the zip and observe a circuit of the aircraft. We are interested in how the flaps deploy on taxi and take-off and again on landing. If TTB is available, we would like to know the readings for the flap positions in each case, like this:


We also need your FSX version so we can compare results for each.
The test package includes the information you see here plus the 4 observations we need. If you are able to help, please download the package and come back and post your results in this thread.
Many thanks in anticipation, John, Steve and Tim.