A sure-fire way to lose a case is to lose credibility with the jury by being dishonest. Of course, facts have a way of being susceptible to multiple interpretations, and different jurors will place greater importance on certain facts than other. One jury member will be inclined to find the pilot's fault important, while another will find the big, bad corporation's prior knowledge of failures more important. Sometimes, it just depends on the prejudices of the individuals on the jury panel. You can't always strike all the potential jurors with an anti-corporate bias. But what you don't want to do is to lose all the jury by misleading them. Any decent attorney on the other side will rub your nose in it if you are making up facts, and can't present evidence to support your claims. And with a case like this one, the paper trail is where the case is fought. (After all, no one on the plane survived to tell the jury that they lost power, resulting in the crash.) If a lawyer makes up a "fact," there will be a big blow-up copy of the document proving that claim false sitting in front of the jury during the entire closing argument of the other side. So, the lawyers aren't inclined to tell the jury "facts" that aren't true.