A light transport jet encountered severe turbulence causing a 60 degree bank angle; a 15 degree pitc...

Attributes
ACN	934674
Time
Date	201102
Local Time Of Day	0601-1200
Place
Locale Reference	SLC.Airport
State Reference	UT
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	Light Transport Low Wing 2 Turbojet Eng
Operating Under FAR Part	Part 135
Flight Phase	Descent
Route In Use	Direct
Flight Plan	IFR
Person 1
Function	First Officer Pilot Flying
Qualification	Flight Crew Air Transport Pilot (ATP) Flight Crew Multiengine
Experience	Flight Crew Last 90 Days 120 Flight Crew Total 3100 Flight Crew Type 450
Events
Anomaly	Deviation - Altitude Excursion From Assigned Altitude Inflight Event / Encounter Weather / Turbulence Inflight Event / Encounter Loss Of Aircraft Control

Narrative:

We were descending via the arrival into slc. Salt lake center warned us of moderate turbulence in the area. We were experiencing winds in excess of 50 KTS. We had just leveled off 13;000 MSL; when we were hit by extreme turbulence. The aircraft was rolled to near 60 degrees of bank and the nose was forced down approximately 15 degrees. The autopilot kicked off. The captain took control of the plane and regained control; but not before we lost approximately 500 ft of altitude. I do no think that there was anything different we could have done to prevent the altitude deviation. We were traveling just below 250 KIAS when the turbulence hit. Upon landing at slc we experienced 50+ KT winds all the way to touchdown.

Original NASA ASRS Text

Title: A Light Transport Jet encountered severe turbulence causing a 60 degree bank angle; a 15 degree pitch down and a 500 FT altitude loss on the descent into SLC at 13;000 FT.

Narrative: We were descending via the arrival into SLC. Salt Lake Center warned us of moderate turbulence in the area. We were experiencing winds in excess of 50 KTS. We had just leveled off 13;000 MSL; when we were hit by extreme turbulence. The aircraft was rolled to near 60 degrees of bank and the nose was forced down approximately 15 degrees. The autopilot kicked off. The Captain took control of the plane and regained control; but not before we lost approximately 500 FT of altitude. I do no think that there was anything different we could have done to prevent the altitude deviation. We were traveling just below 250 KIAS when the turbulence hit. Upon landing at SLC we experienced 50+ KT winds all the way to touchdown.

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.

A light transport jet encountered severe turbulence causing a 60 degree bank angle; a 15 degree pitch down and a 500 ft altitude loss on the descent into slc at 13;000 ft.