Boeing 737 incident near Toronto, Ca, March 13, 2011
On March 13, 2011 at about 10:57 am local time, a Boeing 737, registered CFTAH, was involved in an incident near Toronto (Lester Pearson International airport). It was flown under non-U.S. commercial rules. The NTSB record does not give the injuries.
The NTSB's probable cause their words, unchanged
The NTSB has not yet published a probable cause for this incident. Investigations usually take one to two years; this page updates when the final report is released.
Source: NTSB aviation accident database, copy made October 5, 2026. Docket and reports at the NTSB.
What the record shows
- Date
- March 13, 2011 · about 10:57 am local time
- Place
- Toronto, Canada · Lester Pearson International
- Type
- Incident
- Injuries
- The NTSB record does not give the injuries.
- Weather
- not recorded
- Aircraft
- Boeing 737 8Q8 · all 737s on the register
- Registration
- CFTAH · no longer on the register · serial 29351
- Damage
- Not recorded
- Flight
- Flight · non-U.S. commercial rules
The NTSB's narrative preliminary · quoted from the NTSB record
On March 13, 2011, at 0657 eastern daylight time, a Boeing 737-8Q8 aircraft, registration C-FTAH, experienced stall stickshaker and overspeed clacker warnings upon takeoff from Toronto/Lester B. Pearson International Airport (YYZ), Ontario, Canada. The crew advised air traffic control of a technical problem and returned to YYZ. The airplane was not damaged and no injuries occurred. The flight was registered to and operated by Sunwing Airlines as flight 531 on a flight from YYZ to Cozumel International Airport (CZM), Quintana Roo, Mexico. The investigation is being conducted by the Transportation Safety Board (TSB) of Canada. The NTSB designated a U.S. Accredited Representative as the state of manufacture to assist the TSB's investigation. All inquiries should be directed to: Transportation Safety Board of Canada 200 Promenade du Portage Place du Centre, 4th Floor Hull, Quebec K1A 1K8 Canada Website: http://www.tsb.gc.ca
The complete narrative as the NTSB published it. The NTSB's docket holds the report as a PDF and any photographs, statements and other documents from the investigation.
The factual record from the NTSB's investigation tables, in plain English
The aircraft
- Landing gear: retractable
- Operator: Sunwing Airlines
The flight
- Departed from: YYZ Toronto
- Destination: CZM Cozumel
- Flight plan: IFR
- A second pilot was aboard
Weather at the time
- Temperature: 0°F (-18°C), dew point 0°F (-18°C)
Documents from the investigation the NTSB's docket: the evidence folder behind the report
The docket, the folder of records gathered during an investigation (maintenance records, photographs, witness statements, examinations), has not been read from the NTSB for this case yet; the list appears here once it has. Open the docket at the NTSB.
Everything on this page comes from the NTSB's public records. The narrative, probable cause and findings are the NTSB's own words; the coded tables behind the report are written out in plain English, with pilots' ages, home towns and medical details left out. The documents and photographs are the NTSB's docket, shown as the NTSB released them. This site's own text never names anyone involved. A preliminary report can change; the final report usually follows one to two years later, and the page is refreshed when it does.