OK465,
My own understanding would tell me that RF4 is correct, but I could not prove you wrong either, maybe YOU are correct ?
How things are working in
my opinion :
- The input is full fwd stick in ALT LAW
- The request is for a load factor below 1G
- Both elevators try to honor that request with a down deflection
- THS under autotrim command will try to neutralize that initial elev down deflection
- As no change in the load factor takes place both elev quickly reach full deflection
- THS keeps moving in a ND setting but at a slower rate still trying to neutralize elev deflection
- Until effect eventually takes place
What I don't get in
your view is that nothing can happen until trim is manually moved, and so in ALT LAW when autotrim is active and therefore USE MAN PITCH TRIM is NOT displayed. If you are correct and I did understand you well, there would be another serious question directed to Airbus.