Incident Overview
On March 13, 2011, at 0657 eastern daylight time, a Boeing 737-8Q8 aircraft, registration C-FTAH, experienced stall stickshaker and overspeed clacker warnings during the takeoff phase from Toronto/Lester B. Pearson International Airport (YYZ), Ontario, Canada. The aircraft was operating as Sunwing Airlines flight 531, en route from YYZ to Cozumel International Airport (CZM), Quintana Roo, Mexico.
Crew Response
Upon receiving the stall stickshaker and overspeed clacker warnings, the flight crew advised air traffic control of a technical problem. They subsequently returned to YYZ without further incident.
Aircraft and Occupants
The airplane was not damaged and no injuries occurred during the event. The aircraft, a Boeing 737-8Q8, was registered to and operated by Sunwing Airlines.
Investigation
The Transportation Safety Board (TSB) of Canada is conducting the investigation into the incident. The National Transportation Safety Board (NTSB) designated a U.S. Accredited Representative as the state of manufacture to assist the TSB's investigation.