Source: Simon Hradecky | www.avherald.com

A Jazz Canadair CRJ-900, registration C-FNJZ performing flight QK-8668 from Vancouver,BC (Canada) to San Diego,CA (USA) with 79 people on board, was in the initial climb out of Vancouver’s runway 26L when the crew received a “WING ANTI-ICE FAULT” message, noticed a burning odour and noticed a puff of smoke coming from the wing anti-ice circuit breaker. The smoke quickly dissipated again, the crew did not need to don their oxygen masks, however, levelled off at 3000 feet and returned to Vancouver for a safe landing on runway 26L about 14 minutes after departure.

The Canadian TSB reported the screw securing both DC bus bar and Feeder bus bar from circuit breaker D6 to D7 was found several turns short of being tightened causing high resistance and arcing. The circuit breakers as well as the bus bars were replaced, all attaching screws were torqued.