Narrative:

Aircraft would not pressurize after takeoff. Coordinated with ATC for leveloff and delay vectors. Tried standby pressurization. Checked quick reference handbook. No door warnings. Flight attendants reported loud air noise from aircraft left main cabin door. Returned ewr. Maintenance found door handle left down and locked but door not properly seated. Checking with 'a' flight attendant, found that on departure door was hard to close, but that he was able to get handle down and locked. Cockpit had no abnormal indications of impending problem. Recommend that flight attendants be instructed to always advise cockpit of problems when closing and/or securing an aircraft door, as door warning lights can be out with door not properly seated.

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Original NASA ASRS Text

Title: RETURN LAND MANDATED BY ACR MLG UNABLE TO PRESSURIZE AFTER TKOF.

Narrative: ACFT WOULD NOT PRESSURIZE AFTER TKOF. COORDINATED WITH ATC FOR LEVELOFF AND DELAY VECTORS. TRIED STANDBY PRESSURIZATION. CHKED QUICK REF HANDBOOK. NO DOOR WARNINGS. FLT ATTENDANTS RPTED LOUD AIR NOISE FROM ACFT L MAIN CABIN DOOR. RETURNED EWR. MAINT FOUND DOOR HANDLE L DOWN AND LOCKED BUT DOOR NOT PROPERLY SEATED. CHKING WITH 'A' FLT ATTENDANT, FOUND THAT ON DEP DOOR WAS HARD TO CLOSE, BUT THAT HE WAS ABLE TO GET HANDLE DOWN AND LOCKED. COCKPIT HAD NO ABNORMAL INDICATIONS OF IMPENDING PROB. RECOMMEND THAT FLT ATTENDANTS BE INSTRUCTED TO ALWAYS ADVISE COCKPIT OF PROBS WHEN CLOSING AND/OR SECURING AN ACFT DOOR, AS DOOR WARNING LIGHTS CAN BE OUT WITH DOOR NOT PROPERLY SEATED.

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.