 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
A B737-700 in cruise at FL410 made an emergency descent to 13000 ft due to a dual bleed trip causing loss of cabin pressure. Cause unknown.
| Attributes | |
| ACN | 482862 |
| Time | |
| Date | 200008 |
| Day | Wed |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : lga.airport |
| State Reference | NY |
| Altitude | msl single value : 41000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Dusk |
| Aircraft 1 | |
| Controlling Facilities | artcc : zny.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | B737-700 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other |
| Flight Phase | cruise : level |
| Route In Use | enroute airway : j42.airway |
| 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 : 240 flight time total : 12500 flight time type : 10000 |
| ASRS Report | 482862 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : multi engine pilot : commercial pilot : instrument |
| Events | |
| Anomaly | aircraft equipment problem : critical other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : cabin altitude indicator other flight crewa other flight crewb |
| Resolutory Action | flight crew : declared emergency |
| Consequence | other |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance Aircraft |
| Primary Problem | Aircraft |
Narrative:
Dual bleed trip causing rapid decompression resulting in emergency descent from FL410 to 13000 ft. No injuries to crew or passenger. No damage to aircraft. Some trouble by both pilots with oxygen masks knocking radio earpiece out of ear resulting in momentary distraction from ATC. Earpieces were finally taken out and communication was via overhead speakers.
Original NASA ASRS Text
Title: A B737-700 IN CRUISE AT FL410 MADE AN EMER DSCNT TO 13000 FT DUE TO A DUAL BLEED TRIP CAUSING LOSS OF CABIN PRESSURE. CAUSE UNKNOWN.
Narrative: DUAL BLEED TRIP CAUSING RAPID DECOMPRESSION RESULTING IN EMER DSCNT FROM FL410 TO 13000 FT. NO INJURIES TO CREW OR PAX. NO DAMAGE TO ACFT. SOME TROUBLE BY BOTH PLTS WITH OXYGEN MASKS KNOCKING RADIO EARPIECE OUT OF EAR RESULTING IN MOMENTARY DISTR FROM ATC. EARPIECES WERE FINALLY TAKEN OUT AND COM WAS VIA OVERHEAD SPEAKERS.
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.