The pilot’s original destination was Bozeman, Montana.  But the pilot amended his flight plan and diverted to Butte.  The pilot did not tell air traffic control why he was diverting.  About 25 minutes later, as the aircraft approached for landing at Butte, it went out of control and crashed. 

The NTSB is now investigating two things: (1) why the pilot diverted to Butte, especially when he was so close to Bozeman, and (2) why the pilot lost control and crashed so near the runway at Butte.

Some possible explanations for diverting include:Continue Reading Pilatus Crash at Butte Montana and Occam’s Razor