Narrative: TSC211, an Airbus 310 operated by Air Transat, was conducting an instrument flight rules (IFR) flight departing from Quebec/Jean-Lesage (CYQB) to Montreal/Trudeau (CYUL). Shortly after takeoff, the pilot declared an emergency (PAN PAN). At the same time, the radar registered a drop in altitude from 3 000 ft to 1 300 ft. The pilot then asked to confirm aircraft speed and altitude. He said there had been a problem with speed indication, which seemed to be resolved now. The emergency was cancelled at 1949Z and the aircraft continued its flight to destination.
Narrative: Update #1: The TSB occurrence number and class of investigation were added. The aircraft registration was added. Event name "Aircraft navigation/communication equipment" replaced with "Weather clear air turbulence (CAT)/wind shear/turbulence. According to TSB Report #A08Q0051, an airbus 310, operated by Air Transat, departed from Quebec/Jean-Lesage (CYQB) bound for Montreal/Trudeau (CYUL). During flap retraction at 3 000 feet, strong wind shears caused fluctuations of altitude and airspeed. The crew declared a PAN PAN emergency. A few seconds later, flight conditions returned to normal. The aircraft continued to climb normally, pursued its flight to Montreal/Trudeau and landed without incident. In accordance with aircraft maintenance manual (AMM) 0551-17, a check was made for severe turbulence and to determine if the aircraft exceeded Mmo/Vmo limits. No damage was found. The flight recorder was also removed. Flight data analysis revealed that load factor was not exceeded.
Narrative: Update #2: Investigation Class 5 changed to investigation Class 3.
A class 3 investigation means that a final report should be issued eventually.