A major train accident was averted after a small boulder hit the engine of the Ranchi-bound New Delhi-Ranchi Rajdhani special between Baskatwa block halt and Nathganj halt on the Manpur-Koderma section under Dhanbad rail division of East Central railways (ECR) on Saturday morning. Fortunately there was no derailment or injury to any passenger as the section is on permanent speed restriction due to the topography of the area.