What was found
DURING TAXI OUT, NOTIFIED OF SMOKE COMING FROM LEFT ENGINE. RETURNED TO GATE. MAINTENANCE FOUND OIL IN THE TAILPIPE. NO EVIDENCE OF FIRE. NR 4 BEARING SUSPECTED. REMOVED AND REPLACED NUMBER 1 ENGINE (2016-00454).
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
DURING TAXI OUT, NOTIFIED OF SMOKE COMING FROM LEFT ENGINE. RETURNED TO GATE. MAINTENANCE FOUND OIL IN THE TAILPIPE. NO EVIDENCE OF FIRE. NR 4 BEARING SUSPECTED. REMOVED AND REPLACED NUMBER 1 ENGINE (2016-00454).