Emergency declared when stick shaker activates while in cruise in icing conditions.

Attributes
ACN	268036
Time
Date	199404
Day	Tue
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : brl
State Reference	IA
Altitude	msl bound lower : 8000 msl bound upper : 8000
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zau
Operator	common carrier : air carrier
Make Model Name	Jetstream 32
Operating Under FAR Part	Part 135
Flight Phase	climbout : takeoff climbout : intermediate altitude cruise other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : cfi pilot : atp
Experience	flight time last 90 days : 290 flight time total : 6000 flight time type : 290
ASRS Report	268036
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : cfi pilot : atp
Experience	flight time last 90 days : 78 flight time total : 5560 flight time type : 78
ASRS Report	267935
Events
Anomaly	aircraft equipment problem : critical
Independent Detector	aircraft equipment other aircraft equipment : unspecified
Resolutory Action	flight crew : declared emergency other
Consequence	Other
Supplementary
Primary Problem	Aircraft

Narrative:

Stick shaker activated in-flight. This is a problem that happens occasionally on J-32 aircraft. Stick shaker has gone off at rotation, climb out, and landing for short periods of time. This time in cruise flight, and it was continuous. There is no checklist for shaker itself. The only checklist is for a stall light on cap panel. Emergency was declared because stall system was shut off and crew felt if an emergency was declared it would protect the airspace if any other occurrence would happen. Supplemental information from acn 267935: in cruise flight a stall system warning came on while in icing conditions. I had to turn the system off so we could hear the radio and fly without the stick shaker.

Original NASA ASRS Text

Title: EMER DECLARED WHEN STICK SHAKER ACTIVATES WHILE IN CRUISE IN ICING CONDITIONS.

Narrative: STICK SHAKER ACTIVATED INFLT. THIS IS A PROB THAT HAPPENS OCCASIONALLY ON J-32 ACFT. STICK SHAKER HAS GONE OFF AT ROTATION, CLBOUT, AND LNDG FOR SHORT PERIODS OF TIME. THIS TIME IN CRUISE FLT, AND IT WAS CONTINUOUS. THERE IS NO CHKLIST FOR SHAKER ITSELF. THE ONLY CHKLIST IS FOR A STALL LIGHT ON CAP PANEL. EMER WAS DECLARED BECAUSE STALL SYS WAS SHUT OFF AND CREW FELT IF AN EMER WAS DECLARED IT WOULD PROTECT THE AIRSPACE IF ANY OTHER OCCURRENCE WOULD HAPPEN. SUPPLEMENTAL INFO FROM ACN 267935: IN CRUISE FLT A STALL SYS WARNING CAME ON WHILE IN ICING CONDITIONS. I HAD TO TURN THE SYS OFF SO WE COULD HEAR THE RADIO AND FLY WITHOUT THE STICK SHAKER.

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.