Why the AI is not an AoA indicator
I'm at risk of being called a pedant here, but the AI / AoA thing is a common and dangerous fallacy and it's important to nail it on the head very firmly. Here's an example of why:
Take four flight situations.
First, a descent on approach to land, with a slow speed and relatively high angle of attack. In this situation, the AI will show a small degree of nose down attitude.
Second, a near vertical, full throttle, high speed dive at a very low angle of attack. The AI will show a very high degree of nose down atttitude.
Third, a cruise climb. Angle of attack slightly higher than that for level cruise, but not much, so still a relatively low angle of attack. The AI will show a small nose up attitude.
Fourth, a best angle climb, very high angle of attack. The AI will show a high degree of nose up attitude.
Thus, a high degree of nose down on the AI in the situations above correlates to a LOW angle of attack, whereas a high degree of nose up on the AI correlates to a HIGH angle of attack. In other words, there is no consistent correlation between nose attitude and angle of attack. In the first situation above, you are at risk of stalling with only a small amount of nose down attitude on the AI. In the fourth you are at risk of stalling with a high amount of nose up attitude.
Most important of all, is that this shows the AI alone will tell you nothing about your proximity to the stall. To believe that it has the power to do so will be highly misleading and will likely lead to much more than mere embarrassment.
QDM