Windshear on initial approach; likely from a microburst; caused the flight crew of a CRJ200 to momen...

Narrative:

While attempting an approach to runway 14 in ZZZ; the wind shifted in the opposite direction. Winds were now 320/16g22. We elected to stop the approach and vector around for an approach to runway 32. At about 2300 MSL; we started to configure the aircraft for the approach. 200KIAS; flaps 8; then 20. Just prior to intercepting the glideslope; we encountered a severe windshear where our speed increased from 190-200 up to to 280+ then immediately dropped to around 150 KIAS; maybe less. The aircraft was tossed into left and right banks up to 30 degrees and nose up/down 20 degrees. The airspeed fluctuated severely; and the aircraft was uncontrollable for a period of 6-8 seconds on several different occasions throughout the next 2 minutes. We had ivsi indications of as much as 4400FPM down and we were only at 2200 MSL. The first officer was making call outs of what the indications of performance were. I was hand flying. Max power was applied and maintained for most of the event. We notified the tower we were climbing out after we exited the microburst; turned westbound and headed for a diversion airport where the weather was a lot better.

Original NASA ASRS Text

Title: Windshear on initial approach; likely from a microburst; caused the Flight Crew of a CRJ200 to momentarily lose flight path control. They diverted to another airport after regaining control.

Narrative: While attempting an approach to Runway 14 in ZZZ; the wind shifted in the opposite direction. Winds were now 320/16G22. We elected to stop the approach and vector around for an approach to Runway 32. At about 2300 MSL; we started to configure the aircraft for the approach. 200KIAS; flaps 8; then 20. Just prior to intercepting the glideslope; we encountered a severe windshear where our speed increased from 190-200 up to to 280+ then immediately dropped to around 150 KIAS; maybe less. The aircraft was tossed into left and right banks up to 30 degrees and nose up/down 20 degrees. The airspeed fluctuated severely; and the aircraft was uncontrollable for a period of 6-8 seconds on several different occasions throughout the next 2 minutes. We had IVSI indications of as much as 4400FPM DOWN and we were only at 2200 MSL. The First Officer was making call outs of what the indications of performance were. I was hand flying. Max power was applied and maintained for most of the event. We notified the Tower we were climbing out after we exited the microburst; turned westbound and headed for a diversion airport where the weather was A LOT better.

Data retrieved from NASA's ASRS site as of April 2012 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.

Attributes
ACN	862758
Time
Date	200912
Local Time Of Day	0001-0600
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Make Model Name	Regional Jet 200 ER/LR (CRJ200)
Operating Under FAR Part	Part 121
Flight Phase	Initial Approach
Flight Plan	IFR
Person 1
Function	Captain Pilot Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Person 2
Function	Pilot Not Flying First Officer
Qualification	Flight Crew Commercial
Events
Anomaly	Inflight Event / Encounter Weather / Turbulence Inflight Event / Encounter Loss Of Aircraft Control

Windshear on initial approach; likely from a microburst; caused the flight crew of a CRJ200 to momentarily lose flight path control. They diverted to another airport after regaining control.