Pilot’s Inadvertent Use Of The Landing Gear Control Handle Instead Of The Flaps Selector Switch During The Landing Rollout Analysis: The pilot reported that during the landing roll, about the time that he was applying the brakes, the nose landing gear collapsed. Having no training on what to do in this scenario, he cycled the landing gear by raising then lowering the landing gear control handle. Postflight inspection revealed substantial to the undercarriage near the nose landing gear bay.