Narrative:

Noticed the massive air leak on descent into ZZZ. On takeoff and climb out of ZZZ, the air leak was worse. That's when we were told we were going back to ZZZ for a pressurization problem. I think the problem was initiated at ZZZ1 when catering shut the door and didn't get it shut properly because there wasn't a problem from ZZZ2 to ZZZ1.

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Original NASA ASRS Text

Title: AN MD80 ON CLBOUT DIVERTED DUE TO PRESSURE LEAK IN AFT L SVC DOOR. CAUSED BY DOOR NOT PROPERLY CLOSED AFTER GALLEY SVC.

Narrative: NOTICED THE MASSIVE AIR LEAK ON DSCNT INTO ZZZ. ON TKOF AND CLBOUT OF ZZZ, THE AIR LEAK WAS WORSE. THAT'S WHEN WE WERE TOLD WE WERE GOING BACK TO ZZZ FOR A PRESSURIZATION PROB. I THINK THE PROB WAS INITIATED AT ZZZ1 WHEN CATERING SHUT THE DOOR AND DIDN'T GET IT SHUT PROPERLY BECAUSE THERE WASN'T A PROB FROM ZZZ2 TO ZZZ1.

Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.