Peruvian Airlines flight 216 from Lima to Cuzco suffered a right hand main landing gear collapse during landing rollout on runway 28 at Cuzco-Velazco Astete Airport, Peru. Eight seconds after touchdown, the flight crew noted a strong vibration, originating from the left hand main gear. The right main gear subsequently partially folded outwards with one of the actuators separated from its mounts. The aircraft was evacuated on the runway. There was no fire. CAUSE: Unstable approach and inadequate landing technique for high altitude fields, which resulted in increased landing speed, the start of the flare manoeuvre at higher altitude, and low descent speed, which made the OB-2040-P aircraft make soft contact with the runway, causing inefficiency in operation of the shimmy damper, which did not prevent uncontrolled oscillation of the shock absorbers. CONTRIBUTOR FACTORS: – Lack of instruction and training in simulators that include techniques and maneuvers of landing at high altitude fields, with emphasis on speed control at landing. – Lack of a performance analysis process, through the use of flight recorders or other installed data recording equipment and flight parameters, by the operating company, to enable supervision, control and corrective measures in the operational use of its aircraft.