Investigators say the two pilots of a twin-engine plane that crashed in southwest Colorado, killing all four people aboard, were not qualified to fly the aircraft.
The National Transportation Safety Board says in a preliminary report the pilots were not rated to use the plane's instruments, which were needed Sept. 5 when the Cessna 310 went down in rugged alpine terrain near Silverton.
The NTSB didn't say who was flying the plane, but it identified all four aboard as Californians heading to Amarillo, Texas.
The Denver Post reports the pilots were rated to fly only a single-engine plane and without instruments.
Harold Joseph Raggio and Steven Dale Wilkinson, both of Newberry Springs, were killed in the crash. Rosalinda Leslie, of Hesperia; and Michael Lyle Riley, of Barstow, also were killed.
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