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A C500 crew conducted an emergency descent because of a door seal failure but did not inform ATC because of high noise level interference.
| Attributes | |
| ACN | 636813 |
| Time | |
| Date | 200411 |
| Day | Thu |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | navaid : maf.vortac |
| State Reference | TX |
| Altitude | msl single value : 31000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zfw.artcc |
| Operator | general aviation : personal |
| Make Model Name | Citation I |
| Operating Under FAR Part | Part 91 |
| Flight Phase | cruise : level |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | other |
| Function | flight crew : single pilot oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 75 flight time total : 15500 flight time type : 500 |
| ASRS Report | 636813 |
| Person 2 | |
| Function | flight crew : first officer |
| Events | |
| Anomaly | aircraft equipment problem : critical other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : loss of pressurization other flight crewa |
| Resolutory Action | flight crew : declared emergency flight crew : exited adverse environment other |
| Consequence | other |
| Supplementary | |
| Problem Areas | Aircraft Flight Crew Human Performance |
| Primary Problem | Aircraft |
Narrative:
Rapid decompression caused by failure of door seal. Accomplished emergency descent in accordance with ce-500 emergency procedures checklist to 10000 ft MSL. Failed to inform ATC until after descent complete because of: 1) high noise level. 2) high workload. 3) interference between oxygen mask and headset (sunglasses, too). This could be helped by incorporating earphones along with the microphone into the oxygen mask harness.
Original NASA ASRS Text
Title: A C500 CREW CONDUCTED AN EMER DSCNT BECAUSE OF A DOOR SEAL FAILURE BUT DID NOT INFORM ATC BECAUSE OF HIGH NOISE LEVEL INTERFERENCE.
Narrative: RAPID DECOMPRESSION CAUSED BY FAILURE OF DOOR SEAL. ACCOMPLISHED EMER DSCNT IN ACCORDANCE WITH CE-500 EMER PROCS CHKLIST TO 10000 FT MSL. FAILED TO INFORM ATC UNTIL AFTER DSCNT COMPLETE BECAUSE OF: 1) HIGH NOISE LEVEL. 2) HIGH WORKLOAD. 3) INTERFERENCE BTWN OXYGEN MASK AND HEADSET (SUNGLASSES, TOO). THIS COULD BE HELPED BY INCORPORATING EARPHONES ALONG WITH THE MIKE INTO THE OXYGEN MASK HARNESS.
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.