Two investigators from the National Transportation Safety Board were already at work Friday to look into the fire that appeared after American Airlines flight 1006 arrived in Denver the evening before.

Nearly two months after American Airlines flight 5342 collided with a helicopter, leading to 67 fatalities, the National Transportation Safety Board has provided an update on the investigation.

It has been six weeks since 67 people died in a collision between an American Airlines flight and a U.S. Army Blackhawk helicopter in Washington, D.C.