An air carrier B727 flight crew loses pressurization at FL210 declares an emergency and returns to d...

Attributes
ACN	343823
Time
Date	199608
Day	Sat
Local Time Of Day	1801 To 2400
Place
Locale Reference	atc facility : dfw
State Reference	TX
Altitude	msl bound lower : 10000 msl bound upper : 21000
Environment
Light	Night
Aircraft 1
Controlling Facilities	artcc : zfw
Operator	common carrier : air carrier
Make Model Name	B727 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	climbout : intermediate altitude other other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
ASRS Report	343823
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
ASRS Report	343817
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	flight crew : exited adverse environment flight crew : declared emergency other
Consequence	Other
Supplementary
Primary Problem	Aircraft

Narrative:

During climb out from dfw at approximately FL210, received warning horn indicating cabin pressure loss. So noticed cabin pressure rising through 11000 ft and attempted to arrest it. I immediately declared an emergency and started a descent to 10000 ft. The cabin pressure loss was stopped at approximately 11500 ft with the aircraft in a descent. At 10000 ft, the cabin altitude had been reduced to 8500 ft but no lower. Passenger oxygen masks were not deployed and we returned to dfw, dumping approximately 12000 pounds fuel en route to avoid overweight landing with possible structural damage. Uneventful landing at dfw.

Original NASA ASRS Text

Title: AN ACR B727 FLC LOSES PRESSURIZATION AT FL210 DECLARES AN EMER AND RETURNS TO DFW.

Narrative: DURING CLBOUT FROM DFW AT APPROX FL210, RECEIVED WARNING HORN INDICATING CABIN PRESSURE LOSS. SO NOTICED CABIN PRESSURE RISING THROUGH 11000 FT AND ATTEMPTED TO ARREST IT. I IMMEDIATELY DECLARED AN EMER AND STARTED A DSCNT TO 10000 FT. THE CABIN PRESSURE LOSS WAS STOPPED AT APPROX 11500 FT WITH THE ACFT IN A DSCNT. AT 10000 FT, THE CABIN ALT HAD BEEN REDUCED TO 8500 FT BUT NO LOWER. PAX OXYGEN MASKS WERE NOT DEPLOYED AND WE RETURNED TO DFW, DUMPING APPROX 12000 LBS FUEL ENRTE TO AVOID OVERWT LNDG WITH POSSIBLE STRUCTURAL DAMAGE. UNEVENTFUL LNDG AT 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.

An air carrier B727 flight crew loses pressurization at FL210 declares an emergency and returns to dfw.