As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LAV SMOKE WARNING EICAS AND ALARM IN CABIN AFTER TAKEOFF. WARM PACK SMELL, NO VISIBLE SMOKE OR FIRE AIRCRAFT RELEASED IAW MEL 26-14-00 PLACARD 012059. MAINTENANCE REMOVED AND REPLACED NR 2 ENGINE AFTER FINDING EVIDENCE OF OIL LEAKAGE IN ENGINE COMPRESSOR SECTION IAW TASK CARD 6271001. OPS CHECKS AND LEAK CHECKS GOOD. AIRCRAFT RETURNED TO SERVICE.