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Commuter flight crew on ILS approach did missed approach, encountered severe updrafts and climbed above assigned altitude. Requested vectors out of area.
| Attributes | |
| ACN | 139773 |
| Time | |
| Date | 199003 |
| Day | Wed |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : jln |
| State Reference | MO |
| Altitude | msl bound lower : 3000 msl bound upper : 3800 |
| Environment | |
| Flight Conditions | IMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zkc |
| Operator | common carrier : air carrier |
| Make Model Name | Light Transport, Low Wing, 2 Turboprop Eng |
| Flight Phase | landing : missed approach |
| Route In Use | enroute : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument |
| Experience | flight time last 90 days : 200 flight time total : 2300 flight time type : 560 |
| ASRS Report | 139773 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude inflight encounter : weather non adherence : clearance other anomaly |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : returned to intended course or assigned course |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Weather |
| Air Traffic Incident | Pilot Deviation |
Narrative:
We were shooting the ILS 13 into jln and had to go missed because we were not receive a G/south indication on our receiver. At the time we were experiencing light to moderate turbulence and moderate rain showers. All at once we encountered a severe updraft that pushed us up from our 3000' assigned altitude to 3800'. I retarded the power levers to flight idle and nosed the aircraft over to about 15 degrees nose down in order to stop the climb. At about 3800' the climb had been stopped. The vsi during this time pegged out at 6000 FPM climb. We reported to center that we had hit a updraft and asked for vectors away from the area until we could have another try at the approach. After we were at 3800' we descended back down to 3000', but with the turbulence we were +/-300' until we were vectored into the clear. I have never encountered turbulence of this magnitude before.
Original NASA ASRS Text
Title: COMMUTER FLT CREW ON ILS APCH DID MISSED APCH, ENCOUNTERED SEVERE UPDRAFTS AND CLIMBED ABOVE ASSIGNED ALT. REQUESTED VECTORS OUT OF AREA.
Narrative: WE WERE SHOOTING THE ILS 13 INTO JLN AND HAD TO GO MISSED BECAUSE WE WERE NOT RECEIVE A G/S INDICATION ON OUR RECEIVER. AT THE TIME WE WERE EXPERIENCING LIGHT TO MODERATE TURB AND MODERATE RAIN SHOWERS. ALL AT ONCE WE ENCOUNTERED A SEVERE UPDRAFT THAT PUSHED US UP FROM OUR 3000' ASSIGNED ALT TO 3800'. I RETARDED THE PWR LEVERS TO FLT IDLE AND NOSED THE ACFT OVER TO ABOUT 15 DEGS NOSE DOWN IN ORDER TO STOP THE CLB. AT ABOUT 3800' THE CLB HAD BEEN STOPPED. THE VSI DURING THIS TIME PEGGED OUT AT 6000 FPM CLB. WE RPTED TO CENTER THAT WE HAD HIT A UPDRAFT AND ASKED FOR VECTORS AWAY FROM THE AREA UNTIL WE COULD HAVE ANOTHER TRY AT THE APCH. AFTER WE WERE AT 3800' WE DSNDED BACK DOWN TO 3000', BUT WITH THE TURB WE WERE +/-300' UNTIL WE WERE VECTORED INTO THE CLR. I HAVE NEVER ENCOUNTERED TURB OF THIS MAGNITUDE BEFORE.
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.