Prior to the crash, the weather was rainy and foggy in Manhattan, which could have played a role in the fatal crash.
The person wasn't authorized to discuss the radio calls publicly because of the ongoing federal safety investigation and spoke on condition of anonymity.
President Donald Trump tweeted about the helicopter crash, praising the NYPD for their swift response and saying that the Trump Administration is there to assist the department in whatever it may need in the investigation.
The pilot, identified by his employer as Tim McCormack, was a former fire chief in upstate Clinton, New York.
McCormack was the only fatality reported from the crash on top of the 750-foot AXA Equitable building in Midtown Manhattan.
It briefly triggered memories of 9/11 and fears of a terrorist attack, but authorities said there is no indication the crash was deliberate.
Debris: Emergency crews survey damage on the rooftop of a building after the helicopter crash in New York City.
Five people died after a helicopter plunged into Manhattan's east river near the upscale Upper East Side neighborhood in March 2018.
Doug Brazy, an NTSB safety investigator, held a media briefing from the crash site on Tuesday.
A passenger who rode in the helicopter on an earlier flight the same day told the NTSB that nothing seemed out of the ordinary, Brazy said.
That trip would have taken the helicopter south, over the city's harbor and past the Statue of Liberty.
Norway dominates Super Falcons in 3-0 win, Onome Ebi marks Milestone
Norway vs Nigeria will take place on June 09, 2019 (Sunday midnight), at Stade Auguste- Delaune II football stadium. France and Norway have now recorded three points each, while Korea Republic and Nigeria are pointless.
The Agusta A109E helicopter hit the building within 11 minutes of takeoff, exploding and bursting into flames just before 1:45 p.m. when he attempted to land on the nearby 54-story "AXA Equitable" centre, which has no helipad. "FAA air traffic controllers did not handle the flight".
It's unclear if authorities were aware before the crash that the helicopter had entered restricted air space.
"We think his route of flight did not go as planned and he may have ventured into air space that required that he contact air traffic control", Brazy said.
Brazy said the helicopter was not equipped with a flight data recorder or a cockpit voice recorder. Weather is one of the factors being investigated.
"Should the helicopter have been flying? I do not know yet", he said.
According to FAA records, the 19-year-old helicopter was linked to a real estate company founded by Italian-born investor Daniele Bodini.
A New York City Police Department source told CBS News that the helicopter crash-landed on the roof but did not go into the building.
But a new Uber service is threatening to crowd the skies once more. U.S. Representative Carolyn Maloney, who represents parts of Manhattan, said she wanted all "nonessential" flights banned. Winds were from the east at 9 miles per hour. He was chief of the East Clinton Volunteer Fire Department.
The director at Linden Municipal Airport, Paul Dudley, described Mr McCormack as "a highly seasoned" and "very well regarded" pilot who was a regular at the airfield.
"There was a helicopter that made a forced landing, emergency landing, or landed on the roof of the building for one reason or another", Cuomo said.