This is SOP for families of victims after any aircraft accident folks. You start at the top with the guy with the deepest pockets (usually the aircraft manufacturer or the airline) and go on down the list suing anyone who may have possibly been involved. Most of the lawsuits never really go anywhere. Lawyers are not stupid and can see they won't get much from the FO so they are not going to work too hard on that part of the lawsuit. They file the suit because some grieving family member wants their pound of flesh and then let it quietly go away. 30% of nothing is still nothing. It may be sickening but thats what happens when we, as a country, graduate twice as many lawyers as engineers.