MD80 crew was unable to pressurize the aircraft. This problem was a repeat of previous discrepancy.

Attributes
ACN	565852
Time
Date	200211
Day	Mon
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : dfw.airport
State Reference	TX
Environment
Light	Night
Aircraft 1
Controlling Facilities	tracon : d10.tracon
Operator	common carrier : air carrier
Make Model Name	MD-80 Super 80
Operating Under FAR Part	Part 121
Navigation In Use	other
Flight Phase	climbout : initial climbout : takeoff
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
ASRS Report	565852
Person 2
Function	flight crew : captain oversight : pic
Events
Anomaly	aircraft equipment problem : critical maintenance problem : improper maintenance non adherence : company policies other anomaly other
Independent Detector	other flight crewa other flight crewb
Resolutory Action	controller : issued new clearance flight crew : diverted to another airport flight crew : landed as precaution other
Consequence	other other
Factors
Maintenance	contributing factor : schedule pressure performance deficiency : non compliance with legal requirements performance deficiency : repair performance deficiency : testing performance deficiency : fault isolation
Supplementary
Problem Areas	Aircraft Company Maintenance Human Performance
Primary Problem	Aircraft

Narrative:

After takeoff on runway 36R, it became immediately apparent that the aircraft was not pressurizing properly. The outflow valve was still open. At about 1000 ft, an attempt to operate the pressurization system in manual was ineffective. We leveled at 5000 ft and took vectors and returned to dfw. The aircraft had a similar pressurization problem previously. Included in the write-up was a needed inspection for a very soft overweight landing.

Original NASA ASRS Text

Title: MD80 CREW WAS UNABLE TO PRESSURIZE THE ACFT. THIS PROB WAS A REPEAT OF PREVIOUS DISCREPANCY.

Narrative: AFTER TKOF ON RWY 36R, IT BECAME IMMEDIATELY APPARENT THAT THE ACFT WAS NOT PRESSURIZING PROPERLY. THE OUTFLOW VALVE WAS STILL OPEN. AT ABOUT 1000 FT, AN ATTEMPT TO OPERATE THE PRESSURIZATION SYS IN MANUAL WAS INEFFECTIVE. WE LEVELED AT 5000 FT AND TOOK VECTORS AND RETURNED TO DFW. THE ACFT HAD A SIMILAR PRESSURIZATION PROB PREVIOUSLY. INCLUDED IN THE WRITE-UP WAS A NEEDED INSPECTION FOR A VERY SOFT OVERWT LNDG.

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.