Here’s the accident ob from Pearson
CYYZ 171932Z 27020G32KT 6SM R24L/2600VP6000FT/D BLSN BKN030 M08/M13 A2994 RMK CU5 ACCIDENT REPORT SLP151
Breezy but nothing insane unless there was some kind of rogue gust local to the plane proximity. It couldn’t have been going that fast to be upside down that cleanly.