What was found
WHEN THROTTLES WERE ADVANCED FOR T/O THE LT WINDSHIELD INOPERATIVE CAS MESSAGE POSTED. TOWER REPORTED SEEING SMOKE COMING FROM THE REAR OF THE ACFT. VERIFIED A SMALL AMOUT OF SMOKE COMING FROM THE LT AC GENERATOR EXHAUST. INSPECTED LT ACFT GENERATOR AND FOUND BURNED WINDING THRU VENT. REMOVED THE FAULTY AC GENERATOR AND CLEANED SMOKE RESIDUE. INSTALLED EXCHANGE UNIT AND PERFORMED OPS CHECK SATISFACTORY. WORK DONE IAW MM CHAP 24-20-20 (REV 17).