Authorities investigating cause of Jenni Rivera's plane crash

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By Peter Johnson

A team of investigators are trying to figure out why the jet carrying Mexican-American music super-star Jenni Rivera went down.

The plane was over 40 years old and some think that may have created problems. Another issue some are pointing out that one of the pilots was 78.

Both of those factors will being investigated by authorities.

Mexican authorities say it will take up to 10 days for the initial results of the investigation.

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