FORT WORTH, Texas—A jury found a former Boeing Co. pilot not guilty of deceiving air-safety regulators about a 737 MAX flight-control system later blamed for two fatal crashes.

The decision in the four-day trial in Fort Worth was reached after less than two hours of deliberation and acquitted Mark Forkner on all four counts of wire fraud. Mr. Forkner was accused of misleading a training official at the Federal Aviation Administration about an automated cockpit feature to reduce how much training pilots would need to fly the plane, thus making the jet more attractive to airlines.

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