When the stall warning sounded, the XL captain placed the thrust levers into the TO/GA detent and pitched the aircraft down, however, that pitch down was insufficient for the automatic trim to vary the position of the horizontal stabilizer which had reached its nose up mechanical stop. The captain countered a left roll caused by the onset of stall, the resulting roll movements combined with the high angle of attack generated asymmetry which caused increasing speed differences measured by the Air Data Unit (ADR) 1 and ADR 2, which eventually caused the system to reject all three ADRs and caused the flight control to change to direct law. Under the combined effect of pitch up due to the engine acceleration, the pitch up due to increasing air speed and the horizontal stabilizer still at the mechanical nose up stop, even full side stick down input was insufficient to prevent the nose from pitching up. The XL pilots did not understand what was happening, the lack of reaction to the nose down inputs did not draw the attention of the crew to the stabilizer trim. The crew did not notice that the automatic stabilizer trim was no longer working. No attempt was made to adjust the trim manually or to reduce engine thrust.
ora no,personale opinione....a me sembra che tutte le volte ci sia stato un incidente su un airbus,sempre colpa del pilota....l'aereo non risponde agli input del pilota.....di chi è la colpa??????
