I believe this aircraft developed engine trouble after departing KLGA and safely diverted to KEWR.
Check link:
That was not a regularly scheduled flight, look at the flight number and past flight history. My guess is that they were just moving the plane to EWR on purpose.
Good point. I think the previous posting was a flight to pickup passengers from the diverted flight.
This looks like the diverted flight with an enroute return to KEWR…
Track:
http://flightaware.com/live/flight/AAL321
The media is now reporting American Airlines Flight 321 KLGA to KORD diverted to KEWR.
Looks like the continuation of Flight AAL321 is now on its way from KEWR to KORD. Seems like they did a great job of getting everyone (safely) on their way again.