Something to think about:
The Boeing 737 dissappeared from radar seven minutes after departure, no mayday call, no indication that anything was wrong. Impact is believed to be high speed, nose down. Oh, oh.....not a rudder reversal again I hope ?!
Boeing must be a bit worried too I suspect.
These are just some interesting thoughts to think about and this posting is of a highly speculative nature. Nothing has been concluded yet and probably won't be until at least a year or so.