As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING TAXI THE LAVATORY SMOKE DETECTOR SOUNDED. HOT BLEED OIL SMELL NOTED IN CABIN. BLEEDS WERE ON, MID TEMP SELECTED. DURING TAXI BACK TO THE HANGAR FOR MAINTENANCE, WAS ABLE TO DUPLICATE THE PROBLEM. APU WAS OFF. BOROSCOPE OF THE NR 1 ENGINE FOUND OIL LEAKING FROM THE NR 5 BEARING OIL PRESSURE TUBE. REPLACED THE ENGINE.