What was found
(CAN) DURING TAXI, YAW DAMPER DISENGAGED, IAS FAIL FLAG APPEARED, AD INVALID MSG. CAME ON, STICK PUSHER ACTIVATED, WEIGHT ON WHEEL CAUTION LIGHT ILLUMINATED AND NOSE WHEEL STEERING STOPPED OPERATING. TAXI BACK TO PARKING STAND. CHECK PERFORMED BY TECHNICAL STAFF. BROKEN NOSE WHEEL SENSOR FOUND AND REPLACED.