What was found
(CAN) THE CREW ABORTED A MISSION DUE TO FUMES AND A STRONG OIL ODOR COMING FROM THE BLEED AIR SYSTEM. DECLARED AN IN-FLIGHT EMERGENCY, IFE AND LANDED WITHOUT INCIDENT. THE MAINTENANCE TROUBLESHOOTING COFIRMED THAT THE ODOR WAS COMING FROM THE NR 1 ENGINE. DURING THE INSPECTION OF THE ENGINE BLEED AIR DUCTS, A HEAVY AMOUNT OF OIL FILM WAS FOUND ON THE INSIDE OF BOTH THE LT AND RT SIDE DUCTING. A BORESCOPE INSPECTION REVEALED ONLY A SLIGHT AMOUNT OF AN OIL FILM IN THE ENGINE BYPASS DUCT AND THE NR 4 BEARING AREA. NO OIL WAS DETECTED WITHIN THE IGNITER PORTS. THE ENGINE WILL BE REMOVED FOR FURTHER INVESTIGATION.