A helicopter crashed onto the rooftop of a 51-story building in Midtown Manhattan on Monday afternoon and burst into flames, resulting in the death of the pilot, according to reports.<br /><br />Only one person was aboard the aircraft when it crashed on the roof of 787 Seventh Avenue at 51st Street at 1:43 p.m, city officials said. That person was reported to have been killed.<br /><br />"There haven't been helicopter landings in Manhattan in decades," New York mayor Bill de Blasio is seen saying in the video. <br /><br />"[The evacuation] was orderly," said a man who was hurried out of the building after the helicopter struck.