Arrived to property in Rancho Penasquitos for emergency crashed door service. Found door in crashed level 1 position. Customer agreed to service to reset door. After resetting door and further inspection found reason why door came off track due to horizontal track bolt came loose causing roller to catch when transitioning to vertical track. Lubricated and tightened all necessary hardware, adjusted limits/force settings, tested all safety systems and door/operator running optimally at this time. Next recommended tune up service February 2021.