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Cpr pilot of small transport aircraft experienced total loss of cabin pressure at high altitude and deviated from assigned altitude.
| Attributes | |
| ACN | 223359 |
| Time | |
| Date | 199210 |
| Day | Thu |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : atl |
| State Reference | GA |
| Altitude | msl bound lower : 23800 msl bound upper : 24000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : ztl tower : bna |
| Operator | general aviation : corporate |
| Make Model Name | Small Transport, Low Wing, 2 Turboprop Eng |
| Flight Phase | cruise other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | Other |
| Function | flight crew : single pilot |
| Qualification | pilot : cfi pilot : atp |
| Experience | flight time last 90 days : 110 flight time total : 3550 flight time type : 110 |
| ASRS Report | 223359 |
| Person 2 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Events | |
| Anomaly | aircraft equipment problem : critical altitude deviation : excursion from assigned altitude non adherence : clearance |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other controllera other flight crewa |
| Resolutory Action | controller : issued new clearance flight crew : declared emergency other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Aircraft |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Cruising at FL240 en route to tys. Position just east of atl. Heard pop in forward bulkhead followed by cabin depressurization. Center was unable to give lower altitude due to traffic underneath going into atl. By the time cabin altitude reached 20000, I was given a descend clearance. Just prior to that, the aircraft was about 200 ft low, and ATC inquired about our altitude. We could easily make a descent from this altitude without discomfort for the passenger, but maybe going on oxygen right away would have made the need for lower altitude less urgent and thus a 200 ft altitude deviation would have been avoided.
Original NASA ASRS Text
Title: CPR PLT OF SMT ACFT EXPERIENCED TOTAL LOSS OF CABIN PRESSURE AT HIGH ALT AND DEVIATED FROM ASSIGNED ALT.
Narrative: CRUISING AT FL240 ENRTE TO TYS. POS JUST E OF ATL. HEARD POP IN FORWARD BULKHEAD FOLLOWED BY CABIN DEPRESSURIZATION. CTR WAS UNABLE TO GIVE LOWER ALT DUE TO TFC UNDERNEATH GOING INTO ATL. BY THE TIME CABIN ALT REACHED 20000, I WAS GIVEN A DSND CLRNC. JUST PRIOR TO THAT, THE ACFT WAS ABOUT 200 FT LOW, AND ATC INQUIRED ABOUT OUR ALT. WE COULD EASILY MAKE A DSCNT FROM THIS ALT WITHOUT DISCOMFORT FOR THE PAX, BUT MAYBE GOING ON OXYGEN RIGHT AWAY WOULD HAVE MADE THE NEED FOR LOWER ALT LESS URGENT AND THUS A 200 FT ALTDEV WOULD HAVE BEEN AVOIDED.
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.