As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ELEC BURNING SMELL AND SUBSEQUENT SHOWER OF SPARKS FROM CAPTAINS LEFT GLARESHIELD FOUND LOOSE WIRE ON BACK OF RHEOSTAT(507) . NEED RHEOSTAT PART #86A2EZ8BA0689 FAULT CONFIRMED, LOOSE WIRE. REMOVED AND REPLACED RHEOSTAT SWITCH. SECURED ALL WIRES AND OPS CHECK GOOD. ALL WORK DONE IAW AMM TASK 33-11-00.