B767 flight crew experiences stick shaker activation (3 times) during climb in convective weather. A...

Attributes
ACN	885623
Time
Date	201004
Local Time Of Day	1801-2400
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	IMC
Aircraft 1
Make Model Name	B767-300 and 300 ER
Operating Under FAR Part	Part 121
Flight Phase	Takeoff
Flight Plan	IFR
Component
Aircraft Component	Angle of Attack Vane
Person 1
Function	Captain Pilot Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 150 Flight Crew Total 20000 Flight Crew Type 10500
Person 2
Function	Pilot Not Flying First Officer
Qualification	Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 260 Flight Crew Total 11500 Flight Crew Type 2800
Events
Anomaly	Aircraft Equipment Problem Less Severe

Narrative:

Climbing out at 10;000 feet at a speed of 246 knots flaps retracted; both stick shakers (stall warning) activated. At 260k 15 degrees bank at 10;000 feet stall warning activated again. Also at 300 knots climbing wings level stick shaker activated again for the third time. Upon reaching cruising altitude maintenance and dispatch were contacted via sat com. After consultation; it was determined the best course of action was to return if possible. Weather at the time was thunderstorm over the field. Nearby alternates also had thunderstorms; bos was VMC and was our second option if we could not get into the departure airport. We held until the weather cleared and we dumped 24;000 lbs of fuel to get us below 320;000 lbs for landing; normal approach and landing and taxi to the gate.

Original NASA ASRS Text

Title: B767 Flight Crew experiences stick shaker activation (3 times) during climb in convective weather. After discussion with Maintenance the crew elects to return to departure airport.

Narrative: Climbing out at 10;000 feet at a speed of 246 knots flaps retracted; both stick shakers (Stall Warning) activated. At 260k 15 degrees bank at 10;000 feet stall warning activated again. Also at 300 knots climbing wings level stick shaker activated again for the third time. Upon reaching cruising altitude Maintenance and Dispatch were contacted via sat com. After consultation; it was determined the best course of action was to return if possible. Weather at the time was thunderstorm over the field. Nearby alternates also had thunderstorms; BOS was VMC and was our second option if we could not get into the departure airport. We held until the weather cleared and we dumped 24;000 lbs of fuel to get us below 320;000 lbs for landing; normal approach and landing and taxi to the gate.

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.

B767 flight crew experiences stick shaker activation (3 times) during climb in convective weather. After discussion with maintenance the crew elects to return to departure airport.