1. The information has to be specific - Yes - you should sell Boeing
2. Would a reasonable investor take this information into account when making a decision to trade - Yes - this seems quite clear
3. The information must be non public - IIRC disclosure to a large group of people - in this case the perhaps 200ish people on the plane knowing it had a problem would probably count as the information being public and thus this test is not met and you are free to trade - I think the bar is around 30 people
I knew all those hours spent in compliance training would come in handy one day!