What was found
(CAN) ON TAXIING OUT, SMOKE OBSERVED COMING FROM CAPTAIN'S MAP LIGHT. TROUBLESHOOTING REVEALED WIRES SHORTED ON RHEOSTAT. DEFECTIVE RHEOSTAT CHANGED.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
(CAN) ON TAXIING OUT, SMOKE OBSERVED COMING FROM CAPTAIN'S MAP LIGHT. TROUBLESHOOTING REVEALED WIRES SHORTED ON RHEOSTAT. DEFECTIVE RHEOSTAT CHANGED.