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37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
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Air carrier flight crew was alerted to a cabin pressurization loss by a 10000 ft cabin altitude warning horn. A descent was initiated, and the outflow valve manually closed. Aircraft diverted.
| Attributes | |
| ACN | 303287 |
| Time | |
| Date | 199505 |
| Day | Mon |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : sjc |
| State Reference | CA |
| Altitude | msl bound lower : 31000 msl bound upper : 31000 |
| Environment | |
| Flight Conditions | IMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zoa artcc : zdc |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other Other |
| Flight Phase | cruise other descent other other |
| Route In Use | enroute airway : zoa |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : commercial pilot : cfi pilot : atp |
| Experience | flight time last 90 days : 220 flight time total : 25300 flight time type : 3200 |
| ASRS Report | 303287 |
| 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 : exited adverse environment other other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Aircraft |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Altitude warning horn went off (cabin at 10000 ft). Captain started down. I asked for lower and got 24000 ft. I closed the outflow valve to recover cabin, then asked for lower. We got 14000 ft then 10000 ft. Company advised us to divert to oak. Probably should have declared an emergency.
Original NASA ASRS Text
Title: ACR FLC WAS ALERTED TO A CABIN PRESSURIZATION LOSS BY A 10000 FT CABIN ALT WARNING HORN. A DSCNT WAS INITIATED, AND THE OUTFLOW VALVE MANUALLY CLOSED. ACFT DIVERTED.
Narrative: ALT WARNING HORN WENT OFF (CABIN AT 10000 FT). CAPT STARTED DOWN. I ASKED FOR LOWER AND GOT 24000 FT. I CLOSED THE OUTFLOW VALVE TO RECOVER CABIN, THEN ASKED FOR LOWER. WE GOT 14000 FT THEN 10000 FT. COMPANY ADVISED US TO DIVERT TO OAK. PROBABLY SHOULD HAVE DECLARED AN EMER.
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.