"Claims by an Italian official that an alarm was raised because the pilot had inadvertently pushed an emergency button were strongly rejected by Air Berlin.
As there is no emergency button in the cockpit, it could not have been pressed inadvertently."
The full press releases (in German):
http://www.airberlin.com/site/deu/pr...ROWSER=&ID=174
and
http://www.airberlin.com/site/deu/pr...ROWSER=&ID=172