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An air carrier widebody transport left its assigned altitude in oceanic airspace because of a loss of cabin pressurization.
| Attributes | |
| ACN | 228391 |
| Time | |
| Date | 199212 |
| Day | Sat |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : hnl |
| State Reference | HI |
| Altitude | msl bound lower : 14000 msl bound upper : 35000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zoa tower : hgr |
| Operator | common carrier : air carrier |
| Make Model Name | Widebody, Low Wing, 3 Turbojet Eng |
| Navigation In Use | Other |
| Flight Phase | cruise other |
| Route In Use | enroute : pacific enroute : other oceanic |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : flight engineer pilot : commercial pilot : atp |
| Experience | flight time last 90 days : 180 flight time total : 10000 flight time type : 2100 |
| ASRS Report | 228391 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | aircraft equipment problem : critical altitude deviation : excursion from assigned altitude other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other flight crewa |
| Resolutory Action | flight crew : declared emergency flight crew : exited adverse environment other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Aircraft |
| Air Traffic Incident | Pilot Deviation |
Narrative:
We had a rapid depressurization at FL350. We all donned our oxygen masks. The captain turned the aircraft 90 degrees to the airway toward the northwest and simultaneously initiated an emergency descent. During the descent, I was instructed to contact commercial radio and advise them that we had lost cabin pressure, turned off the airway and were descending to 14000 ft. We obtained a clearance to descend to 14000 ft and fly direct to hnl. The rest of the flight was uneventful and we made a safe landing at hnl.
Original NASA ASRS Text
Title: AN ACR WDB LEFT ITS ASSIGNED ALT IN OCEANIC AIRSPACE BECAUSE OF A LOSS OF CABIN PRESSURIZATION.
Narrative: WE HAD A RAPID DEPRESSURIZATION AT FL350. WE ALL DONNED OUR OXYGEN MASKS. THE CAPT TURNED THE ACFT 90 DEGS TO THE AIRWAY TOWARD THE NW AND SIMULTANEOUSLY INITIATED AN EMER DSCNT. DURING THE DSCNT, I WAS INSTRUCTED TO CONTACT COMMERCIAL RADIO AND ADVISE THEM THAT WE HAD LOST CABIN PRESSURE, TURNED OFF THE AIRWAY AND WERE DSNDING TO 14000 FT. WE OBTAINED A CLRNC TO DSND TO 14000 FT AND FLY DIRECT TO HNL. THE REST OF THE FLT WAS UNEVENTFUL AND WE MADE A SAFE LNDG AT HNL.
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.