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A dhc-8 flight crew lost pressurization in cruise flight at 24000 ft. They descended to a safe altitude; restored pressurization; and continued to destination.
| Attributes | |
| ACN | 807495 |
| Time | |
| Date | 200810 |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | navaid : zzz.vortac |
| State Reference | US |
| Altitude | msl single value : 24000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | artcc : zzz.artcc tower : zzz.tower |
| Operator | common carrier : air carrier |
| Make Model Name | Q400 (Formerly Dash 8-400) |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise : level |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : multi engine pilot : instrument pilot : commercial pilot : private |
| Experience | flight time last 90 days : 200 flight time total : 2400 flight time type : 400 |
| ASRS Report | 807495 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight attendant : on duty |
| Qualification | flight attendant : currently qualified |
| Events | |
| Anomaly | aircraft equipment problem : critical non adherence : published procedure |
| Independent Detector | other other : 2 |
| Resolutory Action | flight crew : exited adverse environment flight crew : overcame equipment problem |
| Supplementary | |
| Problem Areas | Aircraft Flight Crew Human Performance |
| Primary Problem | Ambiguous |
Narrative:
While in cruise at FL240 or FL250; we received a call from the flight attendant who expressed concern that we might be losing pressurization. We then noticed the cabin press warning. We donned oxygen masks and the captain asked me to inform ATC that we had lost pressurization and request a lower altitude. We were given a lower altitude and the captain initiated the descent. The captain then called for the cabin press warning checklist; which I accomplished. At one point during the checklist; I became distraction and mistakenly skipped some items. The captain recognized this immediately and the checklist was subsequently completed. At the completion of the checklist; pressurization had been restored and we attempted to contact the company via our ground stations without any success. We proceeded to our destination; without further incident.
Original NASA ASRS Text
Title: A DHC-8 FLT CREW LOST PRESSURIZATION IN CRUISE FLIGHT AT 24000 FT. THEY DESCENDED TO A SAFE ALTITUDE; RESTORED PRESSURIZATION; AND CONTINUED TO DESTINATION.
Narrative: WHILE IN CRUISE AT FL240 OR FL250; WE RECEIVED A CALL FROM THE FLT ATTENDANT WHO EXPRESSED CONCERN THAT WE MIGHT BE LOSING PRESSURIZATION. WE THEN NOTICED THE CABIN PRESS WARNING. WE DONNED OXYGEN MASKS AND THE CAPT ASKED ME TO INFORM ATC THAT WE HAD LOST PRESSURIZATION AND REQUEST A LOWER ALT. WE WERE GIVEN A LOWER ALT AND THE CAPT INITIATED THE DSCNT. THE CAPT THEN CALLED FOR THE CABIN PRESS WARNING CHKLIST; WHICH I ACCOMPLISHED. AT ONE POINT DURING THE CHKLIST; I BECAME DISTR AND MISTAKENLY SKIPPED SOME ITEMS. THE CAPT RECOGNIZED THIS IMMEDIATELY AND THE CHKLIST WAS SUBSEQUENTLY COMPLETED. AT THE COMPLETION OF THE CHKLIST; PRESSURIZATION HAD BEEN RESTORED AND WE ATTEMPTED TO CONTACT THE COMPANY VIA OUR GND STATIONS WITHOUT ANY SUCCESS. WE PROCEEDED TO OUR DEST; WITHOUT FURTHER INCIDENT.
Data retrieved from NASA's ASRS site as of May 2009 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.