Narrative:

Out of 10000 ft, L2 flight attendant called cockpit to tell us that the L2 door was not closed properly and air was rushing into the cabin. We checked pressure control panel to find that the aircraft was not pressurizing at the normal schedule. Cabin was at about 4000 ft at the time. The L2 door warning light was also on at this time. We descended to 10000 ft and turned back for landing at ZZZ. During descent, the L2 door warning light went out at about cabin pressure of 3000 ft. Normal, underwt landing was accomplished. The door warning lights were checked several times prior to flight and were out. Previous write-up from day before by another crew as aircraft taxied out in ZZ1 found door not closed properly and the door warning light was out in this situation also. ZZZ maintenance also verified that the door warning light would be out in the situation that he found the door in on our arrival at the gate in ZZZ.

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Original NASA ASRS Text

Title: AN MD80 IN CLB AT 10000 FT FLT ATTENDANT RPTED L #2 DOOR NOT CLOSED PROPERLY. CREW NOTED CABIN ALT CLBING AND DOOR WARNING. DIVERTED.

Narrative: OUT OF 10000 FT, L2 FLT ATTENDANT CALLED COCKPIT TO TELL US THAT THE L2 DOOR WAS NOT CLOSED PROPERLY AND AIR WAS RUSHING INTO THE CABIN. WE CHKED PRESSURE CTL PANEL TO FIND THAT THE ACFT WAS NOT PRESSURIZING AT THE NORMAL SCHEDULE. CABIN WAS AT ABOUT 4000 FT AT THE TIME. THE L2 DOOR WARNING LIGHT WAS ALSO ON AT THIS TIME. WE DSNDED TO 10000 FT AND TURNED BACK FOR LNDG AT ZZZ. DURING DSCNT, THE L2 DOOR WARNING LIGHT WENT OUT AT ABOUT CABIN PRESSURE OF 3000 FT. NORMAL, UNDERWT LNDG WAS ACCOMPLISHED. THE DOOR WARNING LIGHTS WERE CHKED SEVERAL TIMES PRIOR TO FLT AND WERE OUT. PREVIOUS WRITE-UP FROM DAY BEFORE BY ANOTHER CREW AS ACFT TAXIED OUT IN ZZ1 FOUND DOOR NOT CLOSED PROPERLY AND THE DOOR WARNING LIGHT WAS OUT IN THIS SIT ALSO. ZZZ MAINT ALSO VERIFIED THAT THE DOOR WARNING LIGHT WOULD BE OUT IN THE SIT THAT HE FOUND THE DOOR IN ON OUR ARR AT THE GATE IN ZZZ.

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.