A mechanical failure, specifically a problem with the main rotor, caused the fatal DPS helicopter crash in Flagstaff, according to a preliminary NTSB report.

Add Yahoo as a preferred source to see more of our stories on Google. An Arizona Department of Public Safety pilot and paramedic trooper were killed in a helicopter crash after "numerous gunbattles" ...

Authorities released a preliminary report on February's helicopter crash in Flagstaff that killed a DPS pilot and a trooper/paramedic.

A helicopter crash near Superior killed four people, including an experienced pilot and his three nieces, after allegedly striking a kilometer-long slackline. The FAA had issued a safety alert for the ...

Add Yahoo as a preferred source to see more of our stories on Google. A helicopter crash on Jan. 2 claimed the lives of four family members from Oregon in a remote area of Pinal County. Officials said ...