5T620 - Incident: Canadian North AT42 at Yellowknife on Dec 10th 2023

A Canadian North Avions de Transport Regional ATR-42-300, registration C-GKLB performing flight 5T-620 from Yellowknife,NT to Kuglutuk,NU (Canada) with 17 people on board, departed Yellowknife in freezing rain after being de-iced, however, immediately after rotation for takeoff the stick shaker activated and a FLT CTRL indication activated. The crew stopped the climb at 1500 feet, identified a stick shaker fault and retracted the landing gear, however, now received indication the right main gear had not come up. The gear was selected down again, three greens were observed. The crew declared PAN PAN and returned to Yellowknife for a safe landing.

The Canadian TSB reported prior to departure 1/8 inch of ice had been observed on the exterior of the aircraft. The aircraft was de-iced, the AoA vanes were checked for freedom of movement, however, immediately after rotation for takeoff the stick shaker activated, subsequently the right hand landing gear showed an unsafe indication upon gear retraction. After landing back "the maintenance team conducted a landing gear retraction overspeed inspection, replaced the right-hand main landing gear uplock box, replaced the crew alerting computer and cleaned the AOA sensors. A satisfactory verification flight was completed and the aircraft was returned to service."

Related Flight: 5T620, Canadian North News