As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW PERFORMED AN AIR TURN BACK DUE TO SMOKE IN THE CABIN. CLIMBING THROUGH 7000' THE FWD LAV SMOKE DETECTOR SOUNDED AND THE F/A REPORTED SMOKE IN THE FWD CABIN. C/W QRH AND DECLARED AN EMERGENCY. MAINTENANCE FOUND EVIDENCE OF OIL AROUND 2.5 BLEED PORT AREA. HIGH POWER ENGINE RUN PERFORMED AND NR 2 ENGINE PRODUCED SMOKE IN THE CABIN. ENGINE REMOVED AND REPLACED.