(From the medium article from an other comment) Air Canada changed their pilot training, changed several manuals and documents, standardizing the fuel weight u

(From the medium article from an other comment) Air Canada changed their pilot training, changed several manuals and documents, standardizing the fuel weight units (which was already in process), changed the circuit breaker, established a flight safety organization, and changed fueling procedures. The story does not say if any person responsible for those parts got any negative consequences, thought one can hope that the hunt for blame was short. It usually doesn't serve to improve security, and in this case there was a long list of consecutive mistakes by a large number of people that allowed for the accident to happen. Among those were also a culture of overriding the Minimum Equipment List, something which Canada had outlawed 5 years before this accident.