At 0214Z the last ACARS message received was "CABIN VERTICAL SPEED". Can someone advise if this would necessarily mean a rapid descent or if it were possible that the static ports were also icing over (and due to simple physics when the "hole" is smaller the same amount of air moves faster through it and causes a reading of higher pressure (and as a consequence a lower altitude).
@damirc, if the static port is closed with ice, the air inside can not longer change the presure.... the ALTIMETER then precisely stood still
but can it be, that the startic port reach a zone of lower presure behind the hull during spin or stall??----> massage "cabin vertical speed"
grity