Air Tahiti in Montreal after a 180 turn around ?

Aviation Notable Activity
1

Somebody knows why an Airbus 340 of Air Tahiti en route from Los Angeles to Paris make a 180 degre turn around over Quebec and landed in Montreal Sunday evening around 8 Jan 29 ? Two hours later it continue its flight for Paris ?

Thanks

2

flightaware.com/live/flight/THT … /KLAX/CYUL

3

Thanks for the reply , the plane overrun Montreal by 250 miles and have to turn back . This is why the trace was so biz when watched in direct .