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Airbus A320 made an emergency descent from FL370 due to failure of both modes of the automatic pressurization system.
| Attributes | |
| ACN | 361828 |
| Time | |
| Date | 199703 |
| Day | Sun |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : msp |
| State Reference | MN |
| Altitude | msl bound lower : 10000 msl bound upper : 37000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zmp tower : phx |
| Operator | common carrier : air carrier |
| Make Model Name | A320 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other Other |
| Flight Phase | cruise other other |
| Route In Use | enroute : direct enroute other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp pilot : flight engineer |
| Experience | flight time last 90 days : 180 flight time total : 14000 flight time type : 2500 |
| ASRS Report | 361828 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 170 flight time total : 4000 flight time type : 750 |
| ASRS Report | 361830 |
| Events | |
| Anomaly | aircraft equipment problem : critical inflight encounter other other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other flight crewa other other : unspecified cockpit |
| Resolutory Action | controller : issued new clearance flight crew : declared emergency flight crew : overcame equipment problem |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Aircraft |
Narrative:
Cabin vertical speed went to -2500 FPM with associated cabin pressure system #1 fault. Cabin then went rapidly to an uncontrolled climb in excess of 2500 FPM. ECAM displayed cabin pressure system #1 and #2 fault. By the time we donned our masks, the cabin was climbing through 15000 ft. I declared an emergency with ATC and began an emergency descent. I leveled off at 10000 ft, discussed conditions in the cabin with the lead flight attendant, and elected to cancel emergency and proceed to msp. Control of outflow valve regained in manual mode.
Original NASA ASRS Text
Title: AIRBUS A320 MADE AN EMER DSCNT FROM FL370 DUE TO FAILURE OF BOTH MODES OF THE AUTO PRESSURIZATION SYS.
Narrative: CABIN VERT SPD WENT TO -2500 FPM WITH ASSOCIATED CABIN PRESSURE SYS #1 FAULT. CABIN THEN WENT RAPIDLY TO AN UNCTLED CLB IN EXCESS OF 2500 FPM. ECAM DISPLAYED CABIN PRESSURE SYS #1 AND #2 FAULT. BY THE TIME WE DONNED OUR MASKS, THE CABIN WAS CLBING THROUGH 15000 FT. I DECLARED AN EMER WITH ATC AND BEGAN AN EMER DSCNT. I LEVELED OFF AT 10000 FT, DISCUSSED CONDITIONS IN THE CABIN WITH THE LEAD FLT ATTENDANT, AND ELECTED TO CANCEL EMER AND PROCEED TO MSP. CTL OF OUTFLOW VALVE REGAINED IN MANUAL MODE.
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.