Incident Overview
On June 19, 2009, a Boeing 767-300, registration SP-LPA, operated by LOT Polish Airlines as flight number LOT 2, was en route from O'Hare International Airport in Chicago, Illinois, to Warsaw, Poland. While cruising at Flight Level 330 in the vicinity of North Bay, Ontario, Canada, the aircraft experienced a sudden and uncommanded overspeed condition. The stick shaker activated, and the left and right electronic engine control (EEC) caution lights illuminated.
Subsequent Events
After the initial occurrence, the aircraft diverted to a holding pattern to burn off excess fuel. During the hold, a similar condition reoccurred. The flight ultimately made an uneventful landing at Lester B. Pearson International Airport in Toronto, Ontario, Canada.
Investigation
The Transportation Safety Board (TSB) of Canada is investigating the event. All inquiries regarding the incident are directed to the TSB at their headquarters in Hull, Quebec.