Originally Posted by
tcasblue
But when I attended a Boeing symposium, if I understood correctly, they said that they were leaning toward the theory that it was caused by the occasional random cosmic ray. Imagine that...a random highly charged atomic particle passing through the airplane and possibly leading to an altitude violation.
Yep, I know the bulletin but I hadn't heard that specific theory..I thought there was a theory/grade A rumour doing the rounds that the problem might be caused by static discharge from the gloves some flight crew were in the habit of wearing....I guess a cosmic ray might well produce a similar effect.