After departing Hartsfield-Jackson Atlanta International Airport (ATL) on Friday, November 21, Southwest Airlines Flight WN-171 had to return to base as its cabin pressurization malfunctioned. The passengers bound for Chicago's Midway International Airport (MDW) were transferred to a new plane after returning to base.

The aircraft in question was a Boeing 737-800, registration N8691A , according to the Aviation Herald. A replacement Boeing 737-700 ferried the unlucky flyers to Chicago. That jet’s registration is N204WN, and it arrived with a delay of about 2 hours and 30 minutes.

Aborted Departure For Southwest

Flight WN-171 took off from Atlanta’s runway 26L and began climbing until it reached 5,000 feet. At that point, the aircrew called air traffic control (ATC) a

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