The pilot killed when his helicopter hit the roof of a New York City skyscraper in rain and fog radioed that he was lost and trying to get back to the heliport but couldn't find it, an official briefed on the investigation told The Associated Press on Tuesday.
The radio calls are the clearest evidence yet that foul weather might have played a role in Monday's 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.
Videos posted on social media soon after the crash showed a helicopter that investigators believe is the doomed chopper pausing and hovering south of the heliport, then turning and making an erratic flight back north through rain and clouds.
The pilot, 58-year-old Tim McCormack, was not authorized to fly in limited visibility, raising questions about why he took off in the first place.
McCormack was only licensed to fly under regulations known as visual flight rules, which require generally good weather and clear conditions, according to the Federal Aviation Administration.