depressurization or if it s a slow decompression. either way, you would make those precautionary measures. it appears the pilot acted appropriately no matter what happened on board. to your point about the cargo section and possibly a door i m just glancing down at my e-mail. when asked about reports of an open door midair they re investigating but cannot confirm. mary schiavo, let me bring you in. as an investigator when you hear all these few, few details i mean this is just happening. how do you read this? well two important points. david is absolutely right. if this is a situation which was first reported that there was a door opening in flight or lack of a door seal it s extremely rare but extremely dangerous. there have been flights in the past where the opening of a door in flight has brought down the plane. because there are warning devices on the doors before they taxi and take out whether that door is properly secured or not. this would be one of those situation where i