@ macdo
You are absolutely right.
the Aircraft pitches down to maintain the Vls
The FMA will not change and it will remain
THR IDLE OPEN DES
P.S.:- Even if you make your current speed go into the Alpha max sector (red tape)[Radid Extension of spiloers]
the A/THR will not command A.Floor
But Fcom says
α is greater than α floor (9.5◦ in configuration 0; 15◦ in configuration 1, 2; 14◦ in configuration 3 ; 13◦ in configuration FULL)
Any one knows why didn't the Aircraft went into
A.FLOOR