Federal investigators have released their preliminary findings on the Sacramento helicopter crash that fatally injured one person .

According to the National Transportation Safety Board's report , released Tuesday, the REACH medical helicopter had just taken off from the UC Davis Medical Center on Oct. 6 when the crew made a mayday call.

Investigators say the flight paramedic noticed that the power had gone out, leaving the helicopter autorotating towards Highway 50.

The helicopter then crashed onto the freeway, coming to a rest in the eastbound lanes.

A section of the outer part of the main rotor blade was found embedded in the roof of the garage of a home near the freeway, according to the preliminary report.

Investigators noted that the helicopter had reached an altitude of aro

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