http://www.ntsb.gov/_layouts/ntsb.av...R16FA130&rpt=p
On June 23, 2016, about 1420 mountain standard time, a Robinson R66, N117TW, collided with terrain
under unknown circumstances near Wikieup, Arizona. Guidance Aviation was operating the helicopter
under the provisions of Title 14 Code of Federal Regulations (CFR) Part 91. The commercial pilot and
the commercial pilot rated passenger sustained fatal injuries. The helicopter was destroyed during the
accident sequence, and the cabin area was consumed by a post impact fire. The cross-country
positioning flight departed Prescott, Arizona, about 1340 with a planned destination of Riverside,
California. Visual meteorological conditions prevailed, and no flight plan had been filed.
The pilot was going to Riverside to take a Part 135 chief pilot check ride with an inspector from the
Federal Aviation Administration (FAA) Flight Standards District Office located there. The pilot rated
passenger was the operator's Part 141 Chief Pilot.
[...]
The helicopter came to rest in hilly desert terrain. The debris field was about 750 yards long and 150 yards wide.
One of the first pieces identified was the outboard 5 feet of a main rotor blade afterbody that had
separated from the leading edge spar. The left side of the helicopter was more fragmented than the
right, and left side cabin pieces and instruments were distributed throughout the early part of the
debris field. The tail boom was about midway into the debris field. The left side/nose cabin was in
the same approximate part of the debris field with a straight separation line across one side. The
cabin came to rest inverted about 600 yards into the debris field, and was destroyed by a postcrash
fire. The engine remained attached to the cabin. The remaining piece of main rotor blade was about the
same distance into the debris field, but 85 yards left of the debris path centerline. The
transmission, mast, and second main rotor blade separated as a unit, and were about 100 yards past the
cabin area in the direction of the centerline of the debris field. The main rotor driveshaft was bent
approximately 15 degrees at the swashplate.