It was a 747F delivered by Boeing in 2007 if indeed it was N571UP.
I have a question for the 747 drivers out there though. How much undiluted oxygen is there? Could there have been a problem after flying for 25-30 minutes?
I still find it strange that they elected to go to DXB. Both AUH and DWC would seem closer as well as DOH.
Tragic event nontheless..