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B737 flight crew unable to gain control of aircraft pressurization returns to field for overweight landing.
| Attributes | |
| ACN | 794514 |
| Time | |
| Date | 200807 |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | msl single value : 7000 |
| Environment | |
| Weather Elements | Rain Thunderstorm |
| Aircraft 1 | |
| Controlling Facilities | tracon : zzz.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | B737-800 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | climbout : initial |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| ASRS Report | 794514 |
| Events | |
| Anomaly | aircraft equipment problem : critical |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : diverted to another airport flight crew : declared emergency other |
| Consequence | other |
| Supplementary | |
| Problem Areas | Aircraft |
| Primary Problem | Aircraft |
Narrative:
Unable to pressurize aircraft. Tried alternate system and manual with valve showing movement but unable to gain control. Leveled off at 7000 ft and declared emergency and returned back to ZZZ for overweight landing on runway 13R. Landed with arff crews standing by and taxied to gate and had aircraft wheels chocked and maintenance perform inspection. Passed inspection and then continued on to original destination.
Original NASA ASRS Text
Title: B737 FLT CREW UNABLE TO GAIN CONTROL OF ACFT PRESSURIZATION RETURNS TO FIELD FOR OVERWEIGHT LNDG.
Narrative: UNABLE TO PRESSURIZE ACFT. TRIED ALTERNATE SYS AND MANUAL WITH VALVE SHOWING MOVEMENT BUT UNABLE TO GAIN CTL. LEVELED OFF AT 7000 FT AND DECLARED EMER AND RETURNED BACK TO ZZZ FOR OVERWT LNDG ON RWY 13R. LANDED WITH ARFF CREWS STANDING BY AND TAXIED TO GATE AND HAD ACFT WHEELS CHOCKED AND MAINT PERFORM INSPECTION. PASSED INSPECTION AND THEN CONTINUED ON TO ORIGINAL DEST.
Data retrieved from NASA's ASRS site as of May 2009 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.