Originally Posted by
East_and_West
Once you qualify for A3*S, both your tier miles and your A3 flights count start over from scratch. So if you need, say, 400 miles for upgrade to S, and fly a segment that earns 1000 tier miles, you are upgraded to S, and your tier miles reset to zero (you don't start with 600 tier miles, so you need an additional 24K - not 23.4K miles- + 4 A3 segments for G).
This is not true, I had +12k miles and 2 legs, got Silver status and all miles that were over 12k miles it were counted for Gold qualification. However, I am not sure about A3 segments.