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An air carrier mdt crew descended through its assigned altitude. Altitude deviation. Error admitted. Pilot discretion clearance.
| Attributes | |
| ACN | 351270 |
| Time | |
| Date | 199610 |
| Day | Sun |
| Place | |
| Locale Reference | atc facility : elm airport : bgm |
| State Reference | NY |
| Altitude | msl bound lower : 14500 msl bound upper : 15000 |
| Environment | |
| Flight Conditions | Mixed |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | artcc : zny tower : dfw |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp pilot : cfi |
| Experience | flight time last 90 days : 247 flight time total : 2700 flight time type : 700 |
| ASRS Report | 351270 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 150 flight time total : 5000 flight time type : 3000 |
| ASRS Report | 351269 |
| Events | |
| Anomaly | aircraft equipment problem : less severe altitude deviation : overshoot altitude deviation : excursion from assigned altitude non adherence : clearance |
| Independent Detector | other controllera |
| Resolutory Action | controller : issued new clearance other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
We were issued a descent clearance at pilot discretion from FL190 to 15000 ft. We began the 'descent check.' at 16000 ft we made the '1000 ft' call. The autoplt did not capture at 15000 ft, and continued to descend. At approximately 14500 ft, the descent was stopped and we initiated a climb. The controller questioned us about our altitude and then told us to 'continue descent to 9000 ft.' we had not reset the local altimeter. We continued down and then were told to contact bgm approach. We continued to bgm without further incident. Possible cause: failure of autoplt to capture, resetting of local altimeter, crew distracted. Solutions could be better crew awareness.
Original NASA ASRS Text
Title: AN ACR MDT CREW DSNDED THROUGH ITS ASSIGNED ALT. ALTDEV. ERROR ADMITTED. PLT DISCRETION CLRNC.
Narrative: WE WERE ISSUED A DSCNT CLRNC AT PLT DISCRETION FROM FL190 TO 15000 FT. WE BEGAN THE 'DSCNT CHK.' AT 16000 FT WE MADE THE '1000 FT' CALL. THE AUTOPLT DID NOT CAPTURE AT 15000 FT, AND CONTINUED TO DSND. AT APPROX 14500 FT, THE DSCNT WAS STOPPED AND WE INITIATED A CLB. THE CTLR QUESTIONED US ABOUT OUR ALT AND THEN TOLD US TO 'CONTINUE DSCNT TO 9000 FT.' WE HAD NOT RESET THE LCL ALTIMETER. WE CONTINUED DOWN AND THEN WERE TOLD TO CONTACT BGM APCH. WE CONTINUED TO BGM WITHOUT FURTHER INCIDENT. POSSIBLE CAUSE: FAILURE OF AUTOPLT TO CAPTURE, RESETTING OF LCL ALTIMETER, CREW DISTRACTED. SOLUTIONS COULD BE BETTER CREW AWARENESS.
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.