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.

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.

Dozens of federal aviation investigators are on the ground in Louisville searching the crash site's debris field, which covers nearly a half-mile area.

A Louisville resident and several businesses filed a federal lawsuit Thursday against UPS and other companies after a fatal cargo plane crash in Louisville this week killed at least 13 people.

LOUISVILLE, Ky. (AP) — Videos from phones, cars and security cameras captured the tragic final moments of a UPS cargo plane as it caught fire and crashed in a massive explosion just outside Louisville’s airport, killing at least 12 people and carving a path of destruction on the ground.

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,

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.

The grim task of finding victims from the firestorm that followed the crash of a UPS cargo plane in Louisville, Kentucky, has entered a third day.