Interesting scenario A320
Let us assume that you are on ILS and you are at 2500' with the Go Around altitude set to 7000'. Now ATC gives you a speed constraint of 160kts. As per the FCTM you can go below the maneuvering speeds, which is S speed for Flaps 1,as long as you're above Vls. So you choose to reduce speed to 160kts with flaps 1, with the help of speed brakes. You've got your speed down to 160, when ATC says Go Around.
The call in this case would be Go Around flaps and PF advances the thrust lever to TOGA. If TOGA is hit first before flaps are retracted, SRS would engage. Now the SRS speed target in a go around would be Vapp or current speed at October Around whichever is higher, restricted to Vls+25. So if your Vls with Config 1 was somewhere close to 150, then SRS will maintain current speed (as it is the higher of Vapp and current speed and is less than Vls+ 25 which is 175). Now you're flying the Go Around profile at Config 0, with speed locked at 160, which is a long way below safe flap Retraction speed. What would be the protection that would kick in at this point to keep us in the safe envelope?
Last edited by Bkdoss; 30th Sep 2017 at 13:11.