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First officer of a lear jet, LR60, momentarily lost control of the aircraft during the initial climb after takeoff due to severe updrafts and overshot initial leveloff altitude.
| Attributes | |
| ACN | 430154 |
| Time | |
| Date | 199903 |
| Day | Wed |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : hpn.airport |
| State Reference | NY |
| Altitude | msl bound lower : 2000 msl bound upper : 2900 |
| Environment | |
| Weather Elements | Windshear Thunderstorm Rain Ice other |
| Light | Night |
| Person 1 | |
| Affiliation | company : corporate |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 110 flight time total : 7900 flight time type : 60 |
| ASRS Report | 430154 |
| Person 2 | |
| Affiliation | company : corporate |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : multi engine pilot : commercial |
| Events | |
| Anomaly | altitude deviation : overshoot inflight encounter : weather inflight encounter : turbulence non adherence : clearance other anomaly |
| Independent Detector | atc equipment other atc equipment : radar other controllera other flight crewa |
| Resolutory Action | controller : issued alert flight crew : regained aircraft control flight crew : returned to original clearance |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance Weather |
| Primary Problem | Weather |
Narrative:
We were initially cleared for takeoff with a climb to 2000 ft. We delayed our takeoff due to a passing hail storm. Once it had cleared the field we took off. During the climb out, we encountered up/downdrafts that would cause vertical speed fluctuations of +/-1500-2500 FPM. As the first officer attempted to level at 2000 ft, we experienced an updraft that initially took us to 2900 ft and severe turbulence. We were queried about our altitude by the white plains tower. I reported the turbulence and explained that we were aware of our actions, but that we really could do nothing about it. The tower responded that there was no problem and to contact new york departure. We eventually exited the cell and were able to maintain our altitude. Contact with new york departure was established and no mention of the deviation was made by the controller. Due to our workload and his, as a result of heavy WX moving through the area, I didn't discuss it with him. It should be noted that our TCASII was on and operating normally. There were no conflicts.
Original NASA ASRS Text
Title: FO OF A LEAR JET, LR60, MOMENTARILY LOST CTL OF THE ACFT DURING THE INITIAL CLB AFTER TKOF DUE TO SEVERE UPDRAFTS AND OVERSHOT INITIAL LEVELOFF ALT.
Narrative: WE WERE INITIALLY CLRED FOR TKOF WITH A CLB TO 2000 FT. WE DELAYED OUR TKOF DUE TO A PASSING HAIL STORM. ONCE IT HAD CLRED THE FIELD WE TOOK OFF. DURING THE CLBOUT, WE ENCOUNTERED UP/DOWNDRAFTS THAT WOULD CAUSE VERT SPD FLUCTUATIONS OF +/-1500-2500 FPM. AS THE FO ATTEMPTED TO LEVEL AT 2000 FT, WE EXPERIENCED AN UPDRAFT THAT INITIALLY TOOK US TO 2900 FT AND SEVERE TURB. WE WERE QUERIED ABOUT OUR ALT BY THE WHITE PLAINS TWR. I RPTED THE TURB AND EXPLAINED THAT WE WERE AWARE OF OUR ACTIONS, BUT THAT WE REALLY COULD DO NOTHING ABOUT IT. THE TWR RESPONDED THAT THERE WAS NO PROB AND TO CONTACT NEW YORK DEP. WE EVENTUALLY EXITED THE CELL AND WERE ABLE TO MAINTAIN OUR ALT. CONTACT WITH NEW YORK DEP WAS ESTABLISHED AND NO MENTION OF THE DEV WAS MADE BY THE CTLR. DUE TO OUR WORKLOAD AND HIS, AS A RESULT OF HVY WX MOVING THROUGH THE AREA, I DIDN'T DISCUSS IT WITH HIM. IT SHOULD BE NOTED THAT OUR TCASII WAS ON AND OPERATING NORMALLY. THERE WERE NO CONFLICTS.
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.