As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT NR 6570 - IAD-MDT - ABORTED TAKEOFF DUE TO THE STALL WARNING AND STICK SHAKER SYSTEM ACTIVATING. AIRCRAFT RETURNED TO GATE WITH NO FURTHER INCIDENTS. MAINTENANCE ADJUSTED BOTH STALL VANES. AIRCRAFT WAS RELEASED AND APPROVED FOR RETURN TO SERVICE. (M)