fizz57
Unlike the majority here who seem to think they know better than the qualified guys and girls at Boeing, Thales and Yuasa ...
But we do know better BECAUSE:-
... and since we know that the entire electrical system was never tested as a whole before the planes started flying, that is where we should look for a root cause.
Had they have tested the complete system in a more rigourous manner that closely replicated in service life, then folks might think that they know less than Boeing and their pals.
Boeing
appears to have placed money and marketing above engineering - such as moving head office 2000 miles away to keep their hands clean. Yet,
every company that gets to the top of the pile will become over confident and pull itself down several rungs. It is only a question of when, not if.