By Allison Lampert (Reuters) -As a bell sounded in the cockpit, three UPS pilots tried to control a cargo flight that crashed this week in Louisville, Kentucky, killing at least 13 people, the National Transportation Safety Board said on Friday.

The UPS plane whose engine exploded in Kentucky had flown out of Baltimore Marshall Airport less than 12 hours earlier.

Investigators are reviewing 63 hours of data collected from the black box of a UPS cargo plane involved in a deadly crash that killed at least 13 people in Louisville, Kentucky, earlier this week. Nine people remain missing as authorities sift through the wreckage of Tuesday's crash in an attempt to piece together what went wrong.

A UPS cargo plane crashed at a Louisville, Kentucky, airport where the company operates its largest package delivery hub. UPS calls the giant center Worldport.

At least nine people are dead after a UPS cargo plane crashed and exploded at the company’s global aviation hub in Kentucky, officials said.

LOUISVILLE, Ky. (WXIX) - The cockpit voice recorder and flight data recorder were both recovered from the wreckage of the deadly UPS plane crash in Louisville. The National Transportation Safety Board posted a photo of the recorders from the MD-11 cargo plane on Thursday morning.