Skywest CRJ2 at Winnipeg on Jan 3rd 2014, circuit breaker panels vent smoke

A Skywest Canadair CRJ-200 on behalf of Delta Airlines, registration N463SW performing flight OO-4476/DL-4476 from Winnipeg,MB (Canada) to Minneapolis,MN (USA) with 53 people on board, was in the initial climb out of Winnipeg when the crew spotted smoke coming from the vents of circuit breaker panels and levelled the aircraft at 3000 feet. While working the checklists the smoke cleared. The crew nonetheless declared emergency and returned to Winnipeg for a safe landing about 21 minutes after departure.

The Canadian TSB reported maintenance determined the smoke was the result of de-icing fluid sprayed into the aft equipment bay prior to departure.