The contact's dad owned a 2023 Tesla Model Y. The contact stated the owner opened the liftgate, attempting to unload the vehicle after a trip, when the liftgate inadvertently fell on the head near the left ear area, fracturing his skull on the left side, causing him to fall backwards and hit his head on the asphalt. As a result, the contacts dads brain bled within both fractures. The contact's dad was taken to a hospital, where he succumbed to his injuries and was the only occupant of the vehicle at the time of the failure. The vehicle was inspected by Tesla, and advised that a power lift strut replacement part was needed; however, the contact wanted NHTSA to inspect the original part before the replacement. The vehicle was not repaired. A police report was not filed. The vehicle remained at his dad's residence. The manufacturer was notified of the failure and confirmed that there was a faulty power lift strut and that the taigate had 1 powered strut, causing the liftgate to close inadvertently. The approximate failure mileage was 17,273.