No Answer
The flight was standard, and it should have been a smooth trip, but something went wrong. About 15 minutes after takeoff, the controller tried to contact the Learjet, but the message went unanswered. The plane was now at 36,500 feet. The controller tried to contact the plane again after a few minutes.
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The controller tried to contact the plane five more times, but there was no response. As it climbed to 39,000 feet, the air traffic controller contacted Colonel Olson, who happened to be in the air nearby. He was directed to intercept the Learjet and investigate why they were not responding.