Effect of improved helicopter crashworthiness design on helicopter accident statistics
In order to minimize the severity of helicopter accidents, the modern generation of helicopters, the UH-60 Blackhawk and the AH-64 Apache, have been designed with more stringent crashworthiness criteria than were the early generation helicopters. These more stringent criteria impose weight and cost penalties on the helicopter.
Source: Effect of improved helicopter crashworthiness design on helicopter accident statistics | RAND