What was found
AFTER ARRIVAL CREW REPORTED MELTING PLASTIC ODOR/SMOKE COMING FROM FLIGHT DECK CIRCUIT BREAKER PANEL AREA AND VENTS. SAME SMELL/SMOKE OBSERVED BY FIRE FIGHTERS AND CREW IN AIRCRAFT FOOTPRINT DOWNWIND OF APU VENT AND REAR BULK COMPARTMENT. HAD TO LEAVE FLIGHT DECK DUE TO FUMES. FIRE FIGHTERS IDENTIFIED THIS AIRCRAFT IS SOURCE OF FUMES FROM OTHER END OF AIRPORT. PLACED ON DEFERRAL 77991 PER MINIMUM EQUIPMENT LIST ATI-49-11-01-01 CATEGORY C. CONDITIONAL INSPECTION FOUND APU STARTER MOTOR FAULTING. NO OIL GOT INTO LEFT OR RIGHT PACK SYSTEMS IAW B767 AMM 05-51-56. REMOVED AND REPLACED APU STARTER, RELAY K0197, AND APU CRANK COMPACTOR IAW B767 AMM 49-41-05. OPERATIONAL CHECK GOOD. DEFERRAL 77991 CLEARED.