As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SMF - CLIMBING THOUGH 2000 FEET, NOTICED OILY SMELL EMANATING FROM BLEED AIR SYSTEM. SHORTLY AFTER, BOTH NR 1 AND NR 2 LAV SMOKE DETECTORS BEGAN SOUNDING. RETURNED TO FIELD. REMOVED AND REPLACED NR 1 AND NR 2 COOLING TURBINE WATER SOCKS. PERFORMED BLEED AIR DUCTING PURGE. NO FURTHER ODOR NOTED. AIRCRAFT RETURNED TO SERVICE.