As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT NR 6578 - IAD-PWM - ABORTED TAKEOFF DUE TO THE LEFT CONDITION LEVER VIBRATED BACK. AIRCRAFT RETURNED TO GATE WITH NO FURTHER INCIDENT. MAINTENANCE TIGHTENED THE TENSION KNOB. AIRCRAFT WAS RELEASED AND APPROVED FOR RETURN TO SERVICE. (M)