Hi,
that is simply not true - the Aircraft systems will not block using the brakes when the plane is in "Air mode".
Even in Warsaw that was not the case.
After the Warsaw accident they did not change the logic - only the
sensitivity and logic of the Weight on Wheels sensors was changed.
The brakes can always be used (see the accident in Equador - they had
brakes but no Ground spoilers and no Thrust reversers).
Only Ground Spoilers and Thrust reversers are locked out while aircraft is
not in Ground mode. - And that makes sense: Braking in the air is no problem
while the use of Reversers or Ground Spoilers surely is.
Marcus