The UPS cargo plane crew tried to control the aircraft for about 25 seconds before it crashed into a ball of flames shortly after taking off on Tuesday.

NTSB official Todd Inman said "numerous" sources could have produced the sound, but it is too early in the investigation to offer further speculation.

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.

Flight data showed the UPS plane that crashed taking off from Louisville's airport Tuesday was going 210 miles per hour at 100 feet of altitude at the last reading retrieved

Louisville Mayor Craig Greenberg said the 14th victim was found at the crash site Friday evening. UPS has identified the plane's three crew members as Captain Richard Wartenberg, First Officer Lee Truitt and International Relief Officer Captain Dana Diamond.

NTSB crews wrapped up their first full day of investigations Thursday at the site of the UPS plane crash in Louisville.WAVE News spoke with a former National Transportation Safety Board member for insight on what takes place during investigations,

On Thursday, UPS released the names of crewmembers on UPS Flight 2976: Capt. Richard Wartenberg, of Independence, Kentucky; First Officer Lee Truitt, of Albuquerque, New Mexico; and International Relief Officer Capt. Dana Diamond, of Bryan, Texas.

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,