Canadian TSB investigators are inspecting an uncommanded fuel transfer between the tanks on Air Canada Rouge Boeing 767-300ER, operating from Athens to Montreal on 16 July.
Transportation Safety Board says the Boeing 767-300ER, powered by General Electric CF6 engines, had been climbing out of Athens when the crew observed a slight a “slight” fuel imbalance.
The flight RV-1935 with 238 passengers dan 9 crew, continued flight at FL320, while the crew carried out checklist, and noticed an uncommanded fuel transfer took place from the left main to the center tank.
Then the crew declared PAN and diverted the flight to London Heathrow, (UK) where the planelanded safely about 3:20 hours after departure from Athens.
The Canadian TSB reported the uncommanded fuel transfer from the left main to the center tank amounted to about 2.6 tons per hour.