What happened
During a training flight involving a flight instructor and a commercial-rated student, the aircraft was performing landings within the traffic pattern. According to statements provided to an FAA inspector, the aircraft approached the runway at an excessive speed. Upon initial contact with the runway, the aircraft ballooned back into the air.
The student pilot reported that during this maneuver, the instructor was yelling, which caused confusion regarding specific instructions. During the second touchdown, the right main landing gear and the nose landing gear collapsed. This resulted in the propellers making contact with the runway surface. The occupants were not injured.
Findings
The flight instructor stated that the student is believed to have inadvertently moved the gear selector switch from the down position to the up position, which caused the landing gear to retract during the sequence of landings.