The records also show that Patrick Cau was fired in May and placed on the "no fly" list by the Transportation Security Administration, WMAQ-TV, Chicago, reported.
The Los Angeles resident admitted to calling in eight bomb threats all targeting Chicago-based United Airlines flights while he was in training to be a flight attendant for competitor American Airlines.
The hoaxes cost United an estimated $267,000 in flight delays and cancellations.
As part of a plea deal, Cau must repay United and is facing up to five years in prison.
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