A report filed to the Transport Canada database shows that an Air Canada Jazz flight had been en route from Halifax to Gander, and was fcleared to descend to 17,000 feet. However, it could not level off and had to drop further, and came close to the Provincial Airlines flight
Wtf does that mean? Sounds like a Jazz crew busted their altitude.
For what it's worth, bad thread title, you guys might not realize but 2.5NM and 500' at cruising altitude is exactly half the required vertical and horizontal sep required, therefore still a close event.
Let's say Saab340 cruising at 340knots groundspeed and a Jazz RJ cruising around 380 knots groundspeed, equals a closure rate of 720 knots (trying not to sound too Topgunny, and assuming head to head)... suddenly that 2.5NM is an incredibly small distance.