As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SHIP 3502 - RTB - DUE TO PASSENGER AT SEAT 20J NOTICED SMOKE COMING FROM THE BOTTOM OF THE #2 ENGINE AND ADVISED THE FA. THE FA CONTACTED THE FLIGHT DECK AND THE TAKEOFF WAS REJECTED. PERFORMED GVI AND RAN #2 ENGINE FOR 5 MINS. CONFIRMED NO SMOKE FROM EXHAUST. RETURNED A/C TO SERVICE. (LP# 7295274)