Henra
Given that Airbus is using C* based laws it would have tried to keep attitude. If the last commanded attitude was 10° NU, it would have tried to keep the nose there, if not corrected even into the stall.
NO, you are wrong there. It does maintain attitude, when autothrust is available. Without autothrust, when speed is decreasing, the aircraft trims to maintain the flightpath which is roughly 1 g. To maintan level flight when speed decreases, the attitude has to change, pitch has to increase, leading to a further decrease in speed and finally to stall. In your example the 10° pitch would have to increase.
You would be correct however, when low speed stability protection is available, which was not in AF447 case in Alt2b law.
This is confirmed in the report on page 187 (chapter 2.2.5.)
Quote:
When there are no protections left, the aeroplane no longer possesses positive longitudinal static stability even on approach to stall. This absence specifically results in the fact that it is not necessary to make or increase a nose-up input to compensate for a loss of speed while maintaining aeroplane altitude.
and
Read it again please. BEA speaks from maintaining altitude. They talk about a level flight there. To maintain the altitude, 1 g flight is mandatory, the attitude has to change to maintain this 1 g for level flight.
Come on guys, we have been through this for years.