UPS said it is temporarily grounding part of its fleet of aircraft after a cargo plane crashed into a ball of flames shortly after taking off from Louisville Muhammad Ali International Airport in Kentucky earlier this week.

A UPS cargo plane crashed in Louisville on Tuesday, Nov. 4, killing at least 12 people. Find out more about state of emergency and cause of crash.

The cockpit voice recorder captured a persistent bell that began about 37 seconds after the crew called for takeoff thrust, and the bell continued until the recording ended, an NTSB official said.

Nine people remain missing after a UPS plane departing Louisville Muhammad Ali International Airport in Kentucky on Tuesday crashed, killing at least 12 people.

The power had just gone off and the ground was shaking at Grade A Auto Parts when the owner received a panicked video call from his chief financial officer. On his screen, CEO Sean Garber watched a “huge fireball” engulf the Louisville,

But a cockpit voice recorder picked up a ringing sound during takeoff that may have signaled looming disaster in the crash that killed at least 13 in Louisville, Ky.

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.

In the video shared by the NTSB, a path of destruction and charred buildings and cars is all that remains following the deadly plane crash. The incident killed at least 13 people, including one child and three UPS crew members who were aboard the plane.