The single-engine Socata TBM 700 airplane that crashed into Interstate 287 in Morristown last week has been taken to a storage facility where investigators from the National Transportation Safety Board will perform a detailed examination.

It could take a year before the examination is complete, which means it could take just as long to discover what caused the crash. Last Tuesday, four people were on their way to Atlanta when the plane went down. On board was a investment banker from New York, his wife, their two children, and his colleague. All passengers and the pilot were killed.

Before the plane crashed, the pilot contacted air traffic control to report icing. NTSB investigators say that the pilot was making an emergency call when radar and radio connection was lost.