AF 447 Thread No. 5

[xcitation]

@PJ2

Thanks, I don't disagree frankly. I'm just trying to find something outside the box to figure out why someone would point an A330 15deg NU and keep it there at FL350+ and these papers got me thinking. I've flown the aircraft at altitude and I must say it was pretty responsive in pitch and roll in Normal Law. I've always doubted the notion that the airplane was slow and 'slushy' to respond to the stick at altitude and that a bit of PIO or inadvertent backstick while controlling roll resulted in an "accidental" climb that continued to 38,000ft but I'm outa ideas!

Would you pick any of these?

The list was in reference to the stick backs during the stall rather than in the flying zoom climb earlier. The stick back during the stall is harder to explain IMHO. The zoom climb could be explained by many reasons e.g. PF wishing to climb out of the warm air he spoke of in the BEA report.

Reasons Why "Generally" Stick Back for Final Mintues?

1. Failure to recognize stall condition (PF responded correctly to the first stall but not subsequent stall).
2. Correcting for perceived overspeed/dive.
3. Ignored flight attitude data.
4. THS trim interferance?
5. Pilots executed wrong stall recovery procedure although they did it right the first time ???
6. Failed flight attitude data on PFDs, no backup steam guage style AI instrument installed. [A330 ADIRU failures: 21 May 2009 Miami-Sao Paulo TAM Flight 8091 registered as PT-MVB and on a 23 June 2009 Hong Kong-Tokyo Northwest Airlines Flight 8 registered as N805NW]
7. Sidestick input fault with nose up bias. Failure to diagnose and overide.