Originally Posted by
vilas
To control speed you have to look at your speed and thrust.They never looked at speed which reached 31kt below Vapp with thrust stuck at idle all along. SFO is a bad example to discuss normal approach. Normal approach within +_10kts or half a dot below or above is straight forward. You pitch for slope and as thrust comes up you will change AoA to maintain it. In airbus FBW the TW couple is not going to take you to GS.
AOA determines airspeed, therefore pulling on the elevator controls the airspeed to decrease. This is just as true for 10 knots on a normal approach as it is for 31 knots at SFO; there is no difference.
(Yes if you want to also maintain a straight vertical path then you have to consider thrust, and the smoothness and timing of AOA vs. thrust changes, but that is a separate matter.)