As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING MAINTENANCE TAXI TO THE GATE, NO PASSENGERS ON BOARD, SMOKE FILLED IN CABIN AND SMOKE DETECTOR SOUNDED. THE TROUBLESHOOTING REVEALED AN OIL LEAK FROM THE NR 5 BEARING OIL PRESSURE TUBE FROM ENGINE NR 1. THE ENGINE WILL BE SENT TO MFG FOR FURTHER INVESTIGATION.