DoctorA300
Actually, it appears that you are the ignorant one- it can also come from the packs themselves.
I've read all the public domain stuff, as well as all the manufacturers briefings and the minutes of various conferences, not to mention industry-circulated reports and BAe bulletins, so one thing I am not is ignorant on the subject.
How you come to the conclusion that I take joy in others misery is bizarre to say the least. I'm interested in the facts, not emotive twaddle. The factsare that it is rare, and all but non-existent if the proper maintenance precautions are taken- which is why we haven't had a recurrence since introducing rigourous checks.