The world’s largest cargo carriers, UPS and FedEx, grounded their MD-11 freighter fleets at the recommendation of Boeing, the aircraft’s manufacturer.

US logistics companies UPS and FedEx have grounded their combined fleet of more than 50 McDonnell Douglas MD-11 cargo planes.

The decision, announced on Friday evening, followed a crash involving one of the planes at Louisville International Airport in Kentucky earlier that week, which killed at least 14 people.