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.

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 National Transportation Safety Board, the agency investigating the deadly UPS plane crash in Louisville, released new video Friday.

The captain of a Delta Air Lines regional jet involved in a collision at LaGuardia Airport last month told investigators he did not recall hearing instructions to yield to another plane.

Federal investigators have successfully extracted data from the cockpit voice and flight data recorders of the United Parcel Service Inc. freighter that crashed in a fireball near the company’s global hub in Kentucky,

The flight data (FDR) and cockpit voice (CVR) recorders have been flown to the NTSB lab in Washington D.C., where the information they contain will be analyzed. The FDR has 63 hours of information covering the last 24 flights made by the aircraft. The CVR contains two hours of audio, including the accident flight.

Watch: Aerial views of Louisville show devastation after UPS plane crash American delivery firm UPS has temporarily grounded part of its fleet of cargo planes after a mid-takeoff crash in Kentucky on Tuesday left at least 14 people dead.