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37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
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Emergency declared descent performed after air carrier mdt loses cabin pressure. Aircraft equipment problem malfunction.
| Attributes | |
| ACN | 305026 |
| Time | |
| Date | 199505 |
| Day | Mon |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : cvg |
| State Reference | OH |
| Altitude | msl bound lower : 25000 msl bound upper : 25000 |
| Aircraft 1 | |
| Controlling Facilities | artcc : zid |
| 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 other other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : cfi pilot : commercial pilot : instrument |
| Experience | flight time last 90 days : 160 flight time total : 3300 flight time type : 70 |
| ASRS Report | 305026 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | aircraft equipment problem : critical other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other flight crewa |
| Resolutory Action | flight crew : exited adverse environment flight crew : declared emergency other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Aircraft |
Narrative:
Upon leveloff at FL250, the left bleed closed (right air conditioner pack was inoperative) causing aircraft to depressurize. An emergency was declared and descent was initiated and dispatch directed us to return to cvg. The rest of the flight was uneventful. The cause was a duct that came off, connecting bleed to pack.
Original NASA ASRS Text
Title: EMER DECLARED DSCNT PERFORMED AFTER ACR MDT LOSES CABIN PRESSURE. ACFT EQUIP PROB MALFUNCTION.
Narrative: UPON LEVELOFF AT FL250, THE L BLEED CLOSED (R AIR CONDITIONER PACK WAS INOP) CAUSING ACFT TO DEPRESSURIZE. AN EMER WAS DECLARED AND DSCNT WAS INITIATED AND DISPATCH DIRECTED US TO RETURN TO CVG. THE REST OF THE FLT WAS UNEVENTFUL. THE CAUSE WAS A DUCT THAT CAME OFF, CONNECTING BLEED TO PACK.
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.