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Delta Connection flight received sink rate alert before Toronto Pearson crash

Aerotime

Around 13 seconds before touchdown as the aircraft was descending through 153 feet above ground level (AGL) the TSB said the CRJ900s indicated airspeed increased to 154 knots whereas the ground speed did not change appreciably, consistent with a performance-increasing wind gust.

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Power-on Stall: How to Recover

Pilot Institute

The turbulent air hits the horizontal stabilizer, which causes a vibration that can be felt throughout the aircraft. The FAA recommends that stalls should be practiced no lower than 1,500 ft AGL. You should always test the stall warning system on the ground to ensure it works. Buffeting is like flying in rough, choppy air.