Apparently today, not a good one (CADORS):
"At 0330Z, Vancouver Terminal advised that ACA565, an Air Canada Embraer E190, IFR San Francisco (KSFO) to Vancouver (CYVR), declared an emergency due avionics failure and control problems, estimating runway 08R at 0355z. ERS advised. ACA565 landed runway 08R safely at 0353z and remained on the runway for a visual inspection. Runway 08R returned to service at 0408z with minimal impact to the operation "