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Cabin altitude began to rise above 10000'. Captain started descent while calling for descent clearance and received clearance before 500' of descent had been accomplished. Cabin pressure control was regained shortly thereafter.
| Attributes | |
| ACN | 148494 |
| Time | |
| Date | 199006 |
| Day | Fri |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : ama |
| State Reference | TX |
| Altitude | msl bound lower : 30500 msl bound upper : 31000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zab |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Flight Phase | cruise other descent other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp pilot : commercial pilot : instrument |
| Experience | flight time last 90 days : 200 flight time total : 10000 flight time type : 2400 |
| ASRS Report | 148494 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : commercial pilot : atp |
| Events | |
| Anomaly | aircraft equipment problem : critical |
| Independent Detector | other controllera other flight crewa |
| Resolutory Action | controller : issued new clearance |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Aircraft |
| Air Traffic Incident | other |
Narrative:
Approaching the VOR at FL310 the cabin altitude exceeded 10000'. I began to descend at 2000 FPM while obtaining a descent clearance from ATC. Clearance was received after leaving my assigned altitude of FL310, but prior to leaving 30500' cabin altitude control was regained west/O having to declare an emergency condition. There was never a conflict with other aircraft.
Original NASA ASRS Text
Title: CABIN ALT BEGAN TO RISE ABOVE 10000'. CAPT STARTED DESCENT WHILE CALLING FOR DESCENT CLRNC AND RECEIVED CLRNC BEFORE 500' OF DESCENT HAD BEEN ACCOMPLISHED. CABIN PRESSURE CTL WAS REGAINED SHORTLY THEREAFTER.
Narrative: APCHING THE VOR AT FL310 THE CABIN ALT EXCEEDED 10000'. I BEGAN TO DSND AT 2000 FPM WHILE OBTAINING A DSNT CLRNC FROM ATC. CLRNC WAS RECEIVED AFTER LEAVING MY ASSIGNED ALT OF FL310, BUT PRIOR TO LEAVING 30500' CABIN ALT CTL WAS REGAINED W/O HAVING TO DECLARE AN EMER CONDITION. THERE WAS NEVER A CONFLICT WITH OTHER ACFT.
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.