Lots of silliness on here
A little bit of simple research on the internet shows that DL57 is a daily flight which routes BOM -AMS then on to DTW (as DL251) and is usually operated by a DL A330-200
On the morning of 23rd April this flight arrived at AMS at 0710 local time and was operated by DL A330-200 N860NW
So maybe this was the flight in question?
Suzeman