Air Canada is facing a crisis after its flight attendants walked off the job over the weekend and rejected a government order to return to work.The union representing 10,000 flight attendants at Canada’s biggest airline said it would request that a judge block a government order Saturday that imposed binding arbitration to resolve a labor dispute between the union and carrier.

Air Canada on Sunday delayed plans to resume limited operations after flight attendants defied a government-mandated back-to-work order and binding arbitration.