Apparently Boeing knew about the problem earlier than they have previously admitted, according to the Beeb. Referring to the article's mention of the "Angle of Attack (AOA) Disagree alert" I must say this passage puzzles me:
Are they suggesting that the left hand doesn't know what the right hand was doing? Whatever, it's looking pretty bad for Boeing.
Sounds to me like a group of thinking heads have got together and come up with that as possibly the best maybe believable?