1. A/c enters cloud with high concentration of super-cooled droplets.
2. Faulty pitot ices over on PF side "freezing" dynamic pressure sent to ADC.
3. Sudden convective event induces a climb reducing static pressure to ADC.
4. PF responds to perceived Mmo excedence with stick back.
5. Static pressure reduces causing airspeed increase.
6. Auto-trim blindly complies with pilot input increasing nose up towards maximum.
7. Repeat steps 4 to 6 until stall....
8. Stall warning stops but comes back on if PF does the right thing.
9. Software has turned off auto trim with stab trim stuck 13 deg up.
10. Software has turned off the bird, just when it would has improved S.A.
11. Checkmate to the software....
In all error chains there's always a bit of man + a bit of machine. But once this kicked off, the man didn't really stand a chance, now did he?
Last edited by Pininstauld; 30th May 2011 at 08:02.