As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED. UPON SELECTING TO GO, THROTTLES ADVANCED SYMMETRICALLY. NO ACCELERATION, SUDDENLY STARTED TURNING RIGHT. PULLED POWER BACK AND USED NOSE WHEEL STEERING TO GO LEFT. ABORTED TAKEOFF. BURNT RUBBER SMELL IN CABIN AND FLIGHT DECK. NO DEBRIS NOTED. SUPPLEMENTAL INFORMATION: PERFORMED TESTS OF CONTROL UNIT, THROTTLE SWITCHES, AND WIRING. UNABLE TO DUPLICATE ISSUE. OK FOR SERVICE BY REPLACING LEFT THROTTLE SWITCH PACK, IAW AMM 31-51-00.