As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED AFT TAKEOFF 5-10 MIN INTO FLIGHT LAV SMOKE DET MSG CAME ON F/A REPORTED SMOKE IN FWD CABIN HAD AN ELECTRICAL SMELL TO IT. REPALCED NR 1 ENGINE (HAD BAD OIL BEARING NR 1). OPS CHECK GOOD. AIRCRAFT RETURNE TO SERVICE. (NOTE) CORRECTION IS CHANGE NR 2 ENGINE TO NR 1 ENGINE. PN AND SN WAS CORRECT. (K)