Narrative:

During cruise at altitude, cabin altitude began a climb. Cabin controller was in the automatic mode of operation. Position indicator of outflow valve indicated valve was closed. A test of all door annunciator lights indicated an operative condition. No annunciator lights for the doors were illuminated. A descent to 10000 ft MSL was requested, granted, and initiated. Control of the cabin altitude was regained and aircraft was stabilized at 10000 ft MSL. Operation of the cabin controller remained in the standby mode for the remainder of flight. Step climbs to 14000 ft MSL and then FL180 were requested to enhance specific fuel consumption rates for continuation of the flight to dfw.

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Original NASA ASRS Text

Title: ACR WDB HAD PRESSURIZATION PROBLEMS AT CRUISE ALT. HAD TO DSND TO 10000 FT BEFORE CTL WAS REGAINED IN STANDBY MODE.

Narrative: DURING CRUISE AT ALT, CABIN ALT BEGAN A CLB. CABIN CTLR WAS IN THE AUTOMATIC MODE OF OP. POS INDICATOR OF OUTFLOW VALVE INDICATED VALVE WAS CLOSED. A TEST OF ALL DOOR ANNUNCIATOR LIGHTS INDICATED AN OPERATIVE CONDITION. NO ANNUNCIATOR LIGHTS FOR THE DOORS WERE ILLUMINATED. A DSCNT TO 10000 FT MSL WAS REQUESTED, GRANTED, AND INITIATED. CTL OF THE CABIN ALT WAS REGAINED AND ACFT WAS STABILIZED AT 10000 FT MSL. OP OF THE CABIN CTLR REMAINED IN THE STANDBY MODE FOR THE REMAINDER OF FLT. STEP CLBS TO 14000 FT MSL AND THEN FL180 WERE REQUESTED TO ENHANCE SPECIFIC FUEL CONSUMPTION RATES FOR CONTINUATION OF THE FLT TO DFW.

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.