Delivery giants UPS and FedEx said they had made the decision to ground the fleet of aircraft after advice from the aircraft manufacturer.

UPS and FedEx are grounding their fleets of MD-11 planes "out of an abundance of caution."

While UPS flight 2976 started uneventfully, a repeating bell was heard on the aircraft's cockpit voice recorder just 37 seconds after the crew called for takeoff thrust, National Transportation Safety...