Flight crew of air carrier widebody transport gets warning in indication of an improperly latched door while climbing through 35000'. They elect to return to sfo, the departure airport, to have it checked.

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Attributes
ACN	136986
Time
Date	199002
Day	Sun
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : lin
State Reference	CA
Altitude	msl bound lower : 35000 msl bound upper : 35000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zoa
Operator	common carrier : air carrier
Make Model Name	Widebody, Low Wing, 2 Turbojet Eng
Navigation In Use	Other
Flight Phase	climbout : intermediate altitude cruise other
Route In Use	departure other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 150 flight time total : 17000
ASRS Report	136986
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Events
Anomaly	aircraft equipment problem : critical
Independent Detector	aircraft equipment other aircraft equipment : unspecified
Resolutory Action	flight crew : declared emergency other
Consequence	Other
Supplementary
Primary Problem	Aircraft

Narrative:

At 35000' awaiting center clearance to FL370/EICAS indication of '1R ent door' not locked closed. Briefed F/a to disarm slide at this location/door handle observed to lift about 8' and loud air leak around door area. Door handle had automatically disarmed slide. While at FL350 attempts made to resecure handle which was only partially successful. Air leak continued. As were concerned over proper closure we returned to sfo for maintenance check. Improper closure by food service suspected. Compounding this was the entry door arming normally which it is not supposed to do if not correctly latched.

Original NASA ASRS Text

Title: FLT CREW OF ACR WDB GETS WARNING IN INDICATION OF AN IMPROPERLY LATCHED DOOR WHILE CLIMBING THROUGH 35000'. THEY ELECT TO RETURN TO SFO, THE DEP ARPT, TO HAVE IT CHECKED.

Narrative: AT 35000' AWAITING CENTER CLRNC TO FL370/EICAS INDICATION OF '1R ENT DOOR' NOT LOCKED CLOSED. BRIEFED F/A TO DISARM SLIDE AT THIS LOCATION/DOOR HANDLE OBSERVED TO LIFT ABOUT 8' AND LOUD AIR LEAK AROUND DOOR AREA. DOOR HANDLE HAD AUTOMATICALLY DISARMED SLIDE. WHILE AT FL350 ATTEMPTS MADE TO RESECURE HANDLE WHICH WAS ONLY PARTIALLY SUCCESSFUL. AIR LEAK CONTINUED. AS WERE CONCERNED OVER PROPER CLOSURE WE RETURNED TO SFO FOR MAINT CHECK. IMPROPER CLOSURE BY FOOD SERVICE SUSPECTED. COMPOUNDING THIS WAS THE ENTRY DOOR ARMING NORMALLY WHICH IT IS NOT SUPPOSED TO DO IF NOT CORRECTLY LATCHED.

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.