What was found
POST FLIGHT CREW REPORTED INTERMITTENT ELECTRICAL BURNING SMELL IN FLIGHT. AIRCRAFT GROUNDED FOR INSPECTIONS AND MAINTENANCE. FOLLOWING INSPECTION, LINE MAINTENANCE REPORTED LEFT TAXI RUNWAY LIGHT SWITCH DISPLAYED EVIDENCE OF ARCING. GENERAL VISUAL INSPECTION OF EWIS PER BOEING 767-300 AIRCRAFT MAINTENANCE MANUAL 20-60-04 SATISFACTORY. OVERHEAD FLIGHT COMPARTMENT PANEL ASSEMBLY REMOVED AND REPLACED PER BOEING 767-300 STANDARD WIRING PRACTICES MANUAL 20-60-06 AND AIRCRAFT MAINTENANCE MANUAL 20-11-00. OPERATIONAL CHECK GOOD. NO ADDITIONAL SYSTEM FAULTS NOTED.