As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PAX NOTICED SMOKE FROM LT ENG I/B SIDE. FOUND OIL COMING FROM DC GENERATOR EXHAUST WAS GOING INTO COWLING SCOOP OF PRECOOLER CLEANED OFF RESIDUAL FROM COWLING AND PRECOOLER RAN ENGINE AND OPS CHECKED GOOD CLEANED IAW AMM 20-10-00 RAN ENGINE IAW AMM 71-00-00.