Associated Press View Comments Federal authorities investigating the fatal crash of a small plane that was responding to a wildfire in northwestern Arizona included an account of the possibility that the aircraft’s left wing fell off, according to a preliminary report released Tuesday. Both people aboard Beechcraft King Air C-90 aircraft — a retired Tucson-area fire chief who was working for the Coronado National Forest and a pilot contracted by the U.S. Forest Service — died in the July 10 crash. Arizona Bureau of Land Management officials said the turbo-prop plane went down as it was doing aerial reconnaissance and helping direct aviation resources over a lightning-caused wildfire burning outside Wikieup, a tiny Mohave County community about 123 miles northwest of Phoenix.