As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON TAXI OUT FLIGHT ATTENDANT SMELLED A FAINT SMELL OF SMOKE IN THE FWD CABIN. A/C RTB AND TECH PERFORMED ENGINE RUN AND CHECKED PNEUMATIC SYSTEM. PERFORMED CHECK OF IFE ENTERTAINMENT SYSTEM. ALSO CHECKED MAIN E/E COMPARTMENT FOR FAULT BALLSOR LRU FAULTS. NO DISCREPANCIES NOTED. COULD NOT DUPLICATE SMELL. ALSO CHECK FWD LAV UNDER SINK AND CABINET AREA, NO FAULTS NOTED.