UA909 - Incident: United B763 near Montreal on Nov 5th 2024

A United Boeing 767-300, registration N661UA performing flight UA-909 from Chicago O'Hare,IL (USA) to Amsterdam (Netherlands) with 149 passengers and 8 crew people on board, was enroute at FL330 about 100nm north of Montreal,QC (Canada) when the crew decided to return to Chicago due to "C HYD QTY" (Central Hydraulic Quantity low) indication. The aircraft landed safely on Chicago's runway 27C about 3:10 hours after departure.

The Canadian TSB reported a post flight inspection revealed a leak in the flap hydraulic system.