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Pressurization problem at FL350 dictated emergency descent. Captain advised by aci he forgot the seat belt sign.
| Attributes | |
| ACN | 177042 |
| Time | |
| Date | 199105 |
| Day | Wed |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : stl |
| State Reference | MO |
| Altitude | msl bound lower : 26000 msl bound upper : 35000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zau |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Flight Phase | descent other other |
| Route In Use | enroute airway : zau |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : instrument pilot : commercial pilot : atp |
| Experience | flight time last 90 days : 100 flight time total : 9500 flight time type : 7000 |
| ASRS Report | 177042 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument |
| Events | |
| Anomaly | aircraft equipment problem : critical altitude deviation : excursion from assigned altitude other anomaly other |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : declared emergency flight crew : overcame equipment problem flight crew : regained aircraft control |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Aircraft |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Cabin pressure loss at 35000', rapid descent made to 26000' where manual pressure was able to maintain cabin pressure at 5000'. While finishing procedures, air safety inspector gave F/a his identify, wanting to come to the cockpit. Being distracted,I missed turning on the seat belt sign. I also had no idea he was on board. On deplaning, he informed me the seat belt sign was not on. I informed him jokingly that it was his fault, he distracted me during the time we were finishing our procedures.
Original NASA ASRS Text
Title: PRESSURIZATION PROBLEM AT FL350 DICTATED EMERGENCY DESCENT. CAPT ADVISED BY ACI HE FORGOT THE SEAT BELT SIGN.
Narrative: CABIN PRESSURE LOSS AT 35000', RAPID DSNT MADE TO 26000' WHERE MANUAL PRESSURE WAS ABLE TO MAINTAIN CABIN PRESSURE AT 5000'. WHILE FINISHING PROCS, AIR SAFETY INSPECTOR GAVE F/A HIS IDENT, WANTING TO COME TO THE COCKPIT. BEING DISTRACTED,I MISSED TURNING ON THE SEAT BELT SIGN. I ALSO HAD NO IDEA HE WAS ON BOARD. ON DEPLANING, HE INFORMED ME THE SEAT BELT SIGN WAS NOT ON. I INFORMED HIM JOKINGLY THAT IT WAS HIS FAULT, HE DISTRACTED ME DURING THE TIME WE WERE FINISHING OUR PROCS.
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.