Helicopter wasn't equipped with terrain alarm system. Spokerson said the NTSB recommended to the FAA that all helicopters carrying over six people be equipped with such a system but the FAA "failed to act."
https://www.latimes.com/california/...ly-key-factor-in-kobe-bryant-helicopter-crash
https://www.latimes.com/california/...ly-key-factor-in-kobe-bryant-helicopter-crash