From Emergency Airworthiness Directive (AD) 2014-25-52
... due to blocked AOA probes, the flight control laws
order a continuous nose down pitch rate that, in a worst case scenario,
cannot
be stopped with backward sidestick inputs, even in the full backward position. If
the Mach number increases during a nose down order, the AOA value of the
Alpha Prot will continue to decrease. As a result, the flight control laws will
continue to order a nose down pitch rate, even if the speed is above minimum
selectable speed, known as VLS.
This condition, if not corrected,
could result in loss of control of the aeroplane....
AD – AFM Procedure
• If the Alpha Prot strip (black and amber) completely and permanently hides the VLS strip (amber) in a stabilized wings-level flight path (without an increase in the load factor):
Keep on one ADR.
Turn off two ADRs.
(emphasis mine)
Gesus: this reads a bit like Space Odyssey 2001 where Dave is deactivating HAL.
