The GPS system on a small medical plane that crashed into a mountainside last month in New Mexico malfunctioned because the military was jamming that signal throughout the area at the time although pilots had been warned to expect that, according to federal investigators.
Four people died in the pre-dawn crash on May 14 that sparked a wildfire that burned for weeks in the rugged Capitan Mountains around Ruidoso where the plane was trying to land that night.
The National Transportation Safety Board released a preliminary report on the crash Wednesday that described the GPS problems the pilots encountered, but investigators won't identify the cause of the crash until they finish their final report sometime next year.
