AirTran B737 at Atlanta on Mar 19th 2014, cabin did not pressurize

An AirTran Boeing 737-700, registration N149AT performing flight FL-1225 from Atlanta,GA to Denver,CO (USA) with 127 people on board, was climbing out of Atlanta when the crew stopped the climb due to the cabin not pressurizing and returned to Atlanta for a safe landing about 20 minutes after departure.

A replacement Boeing 737-700 registration N168AT reached Denver with a delay of 2 hours.