In reply to IPPurewater:
According to an Expert speaking on the BBC News about the Lionair crash investigation report, which was published yesterday, it seems, as is often the case, to have been be due to a fatal combination of a multitude of faults and errors the principle one being that the on board computers kept erroneously detecting a stall attitude, were misinterpreting the angle of attack indicator and forcing the nose down to the extent that the pilots could not override it. In his opinion the pilots reacted in the manner to which normal airline pilots would be expected to, and not in the manner which an experienced test pilot would have done when faced with such an unexpected problem. Although Boeing were aware of this problem, they were working to correct it, but had not publicised it, and not grounded the type, nor published a manual for airline pilots to familiarise themselves with the possibility or how to counter it. The flight crew who had previously flown the aircraft had detected a problem, during their watch, but failed to log it correctly, the Captain on the fatal flight had reported for duty with 'flu, but rather than standing down had continued to fly whilst unwell, and the second pilot was inexperienced, for example not know where the manuals for dealing with a sudden emergency were kept in the flight deck, and had had a history of struggling to keep up to speed during his previous training.