Compass E175 at Austin on Sep 10th 2014, cabin did not pressurize

A Compass Airlines Embraer ERJ-175 on behalf of Delta Airlines, registration N607CZ performing flight CP-5733/DL-5733 from Austin,TX to Los Angeles,CA (USA) with 76 people on board, was climbing out of Austin when the crew stopped the climb at FL200 and entered a hold at 8000 feet for about 40 minutes to burn off fuel. The aircraft landed safely back in Austin about 73 minutes after departure.

Following repairs the aircraft was able to depart again and reached Los Angeles with a delay of 3 hours.