Originally Posted by vilas
And saying direct law would have served him better is not my indictment but Sully's because he chose to put the APU on out of turn to remain in normal law.
What a joke ... Sully did not start the APU to remain in normal law, but to secure some redundancy for electric and hydraulic, and have a chance to achieve an engine restart.
If it was in alternate or direct law with stall warning he would have pushed the nose down with no different results.
To the contrary, an earlier warning would have prompted Sully to give some slack to the stick and keep that energy for later when it all matters : flare and touchdown.