Loss of aircraft control in proximity of thunderstorm activity.

Attributes
ACN	276391
Time
Date	199406
Day	Tue
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : iiu
State Reference	KY
Altitude	msl bound lower : 23000 msl bound upper : 24300
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zid artcc : zlc
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Flight Phase	cruise other other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 160 flight time total : 7000 flight time type : 700
ASRS Report	276391
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 : declared emergency other
Consequence	Other
Supplementary
Primary Problem	Weather

Narrative:

In clouds at 23000 ft encountered severe turbulence -- violent enough to disengage autoplt. A climb rate of plus 6000 FPM was finally stopped at 24300 ft. An emergency with center was declared and 7700 squawked. Our radar seemed to be operating normally with the closest cell over 20 NM away.

Original NASA ASRS Text

Title: LOSS OF ACFT CTL IN PROX OF TSTM ACTIVITY.

Narrative: IN CLOUDS AT 23000 FT ENCOUNTERED SEVERE TURB -- VIOLENT ENOUGH TO DISENGAGE AUTOPLT. A CLB RATE OF PLUS 6000 FPM WAS FINALLY STOPPED AT 24300 FT. AN EMER WITH CTR WAS DECLARED AND 7700 SQUAWKED. OUR RADAR SEEMED TO BE OPERATING NORMALLY WITH THE CLOSEST CELL OVER 20 NM AWAY.

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.