An American Airlines Boeing 767-300, registration N343AN performing flight AA-86 from Chicago O’Hare,IL (USA) to London Heathrow,EN (UK) with 170 people on board, was enroute at FL350 about 10nm west of London,ON (Canada) when the crew received a “Left Hydraulic Quantity Low” EICAS message, worked the related checklists and decided to return to Chicago. The aircraft landed safely back in Chicago about 105 minutes after departure.
The Canadian TSB reported the aircraft performed an overweight landing back in Chicago.
The Aviation Herald