Unfortunately a climb to SA wouldn't have been an option, due to the +4deg icing restriction placed on the aircraft.
Doesn't this single fact utterly preclude a verdict of gross negligence when coupled with the obvious pressure to successfully conclude what is, after all, a pretty mundane task? Or would that oversimplify the issue for the Caz's, Wratton and Day's of this world...
Oh... Caz... I notice you call for me to "explain myself" yet when I do you chose to ignore me... Funny that...
