AAL90 had a U-turn, returned to ORD

Aviation Notable Activity
1

Wonder if anyone knows what caused this return to O’Hare.

http://flightaware.com/live/flight/AAL90/history/20091025/1526Z/KORD/EGLL

2

Have no idea but here’s a link that works:
http://flightaware.com/live/flight/AAL90/history/20091025/1526Z/KORD/EGLL

3

Maybe the pilot forgot his laptop??

4

It could be anything…

5

According to faa;AAl90 encountered engine trouble at fl330.