Air Canada A321 near Calgary on Jul 11th 2014, hydraulic leak

An Air Canada Airbus A321-200, registration C-GJWD performing flight AC-146 from Calgary,AB to Toronto,ON (Canada) with 176 people on board, was enroute at FL350 about 270nm east of Calgary when the crew received indication of low quantity for the yellow hydraulic system and decided to return to Calgary, where the aircraft landed safely about 2 hours after departure.

The Canadian TSB reported maintenance discovered a leaking hydraulic line in the pylon.

A replacement Airbus A321-200 reached Toronto with a delay of 4:15 hours.