Any idea what caused AAL90 to make a drastic course change on Aug. 29, 2011 when leaving ORD?


I doubt it did that. Every once in a while things like that happen.

It was probably another flight in the air at the same time that the FAA briefly identified to us as AAL90.

If you look at the track log http://flightaware.com/live/flight/AAL90/history/20110829/1410Z/KORD/EGLL/tracklog] for that flight, you’ll see a block of data from Toronto Center inserted into data from Minneapolis Center. The Toronto data is what is messed up.