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A falcon 50 crew reported a loss of cabin pressurization in the vicinity of iad, causing them to make an emergency descent. They restored pressurization and continued to their destination, pdk.
| Attributes | |
| ACN | 568522 |
| Time | |
| Date | 200212 |
| Day | Mon |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : iad.airport |
| State Reference | VA |
| Altitude | msl single value : 35000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zny.artcc |
| Operator | general aviation : corporate |
| Make Model Name | Falcon 50 |
| Operating Under FAR Part | Part 91 |
| Navigation In Use | other |
| Flight Phase | cruise : level |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : corporate |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 110 flight time total : 5000 flight time type : 1000 |
| ASRS Report | 568522 |
| Person 2 | |
| Affiliation | company : corporate |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 90 flight time total : 4500 flight time type : 150 |
| ASRS Report | 568521 |
| Events | |
| Anomaly | aircraft equipment problem : critical other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : 10000 ft horn other flight crewa |
| Resolutory Action | aircraft : equipment problem dissipated controller : issued new clearance flight crew : declared emergency flight crew : overcame equipment problem |
| Consequence | other |
| Supplementary | |
| Problem Areas | Aircraft |
| Primary Problem | Aircraft |
Narrative:
At FL350 northeast of iad, va, talking to ZNY, heard a thud in the aft cabin. Simultaneously, the cabin light and horn came on. Cabin altitude climbed to FL200. Donned masks and declared emergency and advised ATC of our descent. Ran checklist and failed to get control of the cabin at FL180, in automatic and manual mode. Descended to 10000 ft and regained control of cabin in both manual and automatic modes. Cabin stabilized at 4000 ft and 2.5 psi. Found no abnormal indications and felt safety of flight was assured. Canceled our emergency status. Continued on to destination (pdk). Supplemental information from acn 568521: we found no abnormal indications at 10000 ft and felt that the safety of flight was assured. We were able to maintain 4000 ft cabin altitude at 10000 ft MSL at 2.5 psi differential. We canceled our emergency status with center and continued on to destination (pdk) at 10000 ft MSL.
Original NASA ASRS Text
Title: A FALCON 50 CREW RPTED A LOSS OF CABIN PRESSURIZATION IN THE VICINITY OF IAD, CAUSING THEM TO MAKE AN EMER DSCNT. THEY RESTORED PRESSURIZATION AND CONTINUED TO THEIR DEST, PDK.
Narrative: AT FL350 NE OF IAD, VA, TALKING TO ZNY, HEARD A THUD IN THE AFT CABIN. SIMULTANEOUSLY, THE CABIN LIGHT AND HORN CAME ON. CABIN ALT CLBED TO FL200. DONNED MASKS AND DECLARED EMER AND ADVISED ATC OF OUR DSCNT. RAN CHKLIST AND FAILED TO GET CTL OF THE CABIN AT FL180, IN AUTO AND MANUAL MODE. DSNDED TO 10000 FT AND REGAINED CTL OF CABIN IN BOTH MANUAL AND AUTOMATIC MODES. CABIN STABILIZED AT 4000 FT AND 2.5 PSI. FOUND NO ABNORMAL INDICATIONS AND FELT SAFETY OF FLT WAS ASSURED. CANCELED OUR EMER STATUS. CONTINUED ON TO DEST (PDK). SUPPLEMENTAL INFO FROM ACN 568521: WE FOUND NO ABNORMAL INDICATIONS AT 10000 FT AND FELT THAT THE SAFETY OF FLT WAS ASSURED. WE WERE ABLE TO MAINTAIN 4000 FT CABIN ALT AT 10000 FT MSL AT 2.5 PSI DIFFERENTIAL. WE CANCELED OUR EMER STATUS WITH CTR AND CONTINUED ON TO DEST (PDK) AT 10000 FT MSL.
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.