Heat damage to voice recorder delays investigation

REDDING, Calif. — Officials investigating a deadly helicopter crash in Northern California say the cockpit voice recorder suffered heat damage that's complicating efforts to extract information.

Nine people were killed and four people injured when the aircraft went down in the remote Shasta-Trinity National Forest last week.

The National Transportation Safety Board said Friday the recorder will be sent to England, where the device's British manufacturer will help investigators try to recover recordings that could shed light on what caused the crash.

The agency says a team of investigators is in Portland this week to examine the chopper's two engines, which were taken there after being recovered from the wreckage.

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