Narrative:

The following is a summary of the events related to flight of march 1992: cleared for takeoff runway 28R pit. After takeoff clearance: turn right heading 360, maintain 5,000 ft. Just past V1 at rotation, both stall recognition system sounded with stick shakers, stall lights and both horns. Warning was determined to be false as proper airspeed profile was maintained during all phases of flight. Stall test switch was held in both system 1 and system 2. The warning with stick shakers, stall lights and horns continued. The right stall warning computer circuit breaker was pulled, the stall warning stopped and all system returned to normal after the circuit breaker was reset. The problem was discussed with the dispatcher and maintenance control in flight and we agreed to proceed to btv. Due to full stall warning sounding, the tower's takeoff instructions stated in item 1 above were not followed. Climb was continued straight ahead and normal noise abatement climb was not followed. Power was left at takeoff power until stall warning was determined false. Takeoff power did not exceed four mins. During the time the stall warning was sounding, the nose level was so high, communications between pilots was extremely difficult. The nose level was so disruptive, radio contact was lost with the tower for the change over to departure control. The co-pilot initially transmitted in the blind to departure, stating the nature of the problem. Volumes were turned to the maximum and we were then able to get vector headings and an altitude until the abnormal was resolved and dispatch contacted. Later than evening during a telephone conversation with the pit departure controller, his comments as follows: our initial contact scared him due to the 'gosh awful noise' in the backgnd. However, once the controller understood the nature of the problem, all questions were answered for him and he fully concurred with our actions.

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Original NASA ASRS Text

Title: STICK SHAKER AND AURAL TKOF WARNING HORN ACTIVATED ON TKOF. ACFT MAINT DISCREPANCY PROBLEM.

Narrative: THE FOLLOWING IS A SUMMARY OF THE EVENTS RELATED TO FLT OF MARCH 1992: CLRED FOR TKOF RWY 28R PIT. AFTER TKOF CLRNC: TURN R HDG 360, MAINTAIN 5,000 FT. JUST PAST V1 AT ROTATION, BOTH STALL RECOGNITION SYS SOUNDED WITH STICK SHAKERS, STALL LIGHTS AND BOTH HORNS. WARNING WAS DETERMINED TO BE FALSE AS PROPER AIRSPD PROFILE WAS MAINTAINED DURING ALL PHASES OF FLT. STALL TEST SWITCH WAS HELD IN BOTH SYS 1 AND SYS 2. THE WARNING WITH STICK SHAKERS, STALL LIGHTS AND HORNS CONTINUED. THE RIGHT STALL WARNING COMPUTER CIRCUIT BREAKER WAS PULLED, THE STALL WARNING STOPPED AND ALL SYS RETURNED TO NORMAL AFTER THE CIRCUIT BREAKER WAS RESET. THE PROBLEM WAS DISCUSSED WITH THE DISPATCHER AND MAINT CTL IN FLT AND WE AGREED TO PROCEED TO BTV. DUE TO FULL STALL WARNING SOUNDING, THE TWR'S TKOF INSTRUCTIONS STATED IN ITEM 1 ABOVE WERE NOT FOLLOWED. CLB WAS CONTINUED STRAIGHT AHEAD AND NORMAL NOISE ABATEMENT CLB WAS NOT FOLLOWED. PWR WAS LEFT AT TKOF PWR UNTIL STALL WARNING WAS DETERMINED FALSE. TKOF PWR DID NOT EXCEED FOUR MINS. DURING THE TIME THE STALL WARNING WAS SOUNDING, THE NOSE LEVEL WAS SO HIGH, COMS BTWN PLTS WAS EXTREMELY DIFFICULT. THE NOSE LEVEL WAS SO DISRUPTIVE, RADIO CONTACT WAS LOST WITH THE TWR FOR THE CHANGE OVER TO DEP CTL. THE CO-PLT INITIALLY XMITTED IN THE BLIND TO DEP, STATING THE NATURE OF THE PROBLEM. VOLUMES WERE TURNED TO THE MAX AND WE WERE THEN ABLE TO GET VECTOR HDGS AND AN ALT UNTIL THE ABNORMAL WAS RESOLVED AND DISPATCH CONTACTED. LATER THAN EVENING DURING A TELEPHONE CONVERSATION WITH THE PIT DEP CTLR, HIS COMMENTS AS FOLLOWS: OUR INITIAL CONTACT SCARED HIM DUE TO THE 'GOSH AWFUL NOISE' IN THE BACKGND. HOWEVER, ONCE THE CTLR UNDERSTOOD THE NATURE OF THE PROBLEM, ALL QUESTIONS WERE ANSWERED FOR HIM AND HE FULLY CONCURRED WITH OUR ACTIONS.

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.