American Airlines flight AA-2023 had to divert and make an emergency landing at Des Moines International Airport, Polk County, Iowa, on March 18.
The Airbus A321-200, flying from Chicago, Illinois to Phoenix, Arizona, was mid-air above Iowa when the crew detected smoke in the cockpit, causing it to divert.
The plane landed uneventfully.
All 196 people onboard remained unhurt.
The incident is under investigation.