On the 330/340 try putting ''aoa'' into the ACMS on MCDU 3. This gives a readout of current angle of attack which at 350-370/.81 usually reads 2.2 to 2.3 degrees. Could help with loss of all speed/mach and/or PFDs. Obviously only good for benign conditions and you would have to do it in advance as you cannot do it in the middle of the emergency. But don't think it would've helped in Af's extreme condns....