What was found
AIR TURNBACK. FLIGHT CREW REPORTED FWD LAVATORY SMOKE ALARM ACTIVATED WHILE CLIMBING THROUGH 8000 FT. PASSENGERS IN ROW 2 NOTED DISTINCT SMELL/ODOR OR SMOKE (OVEN/ELECTRICAL) DURING FLIGHT. NR 2 PACK TRIP OFF LIGHT ILLUMINATED IMMEDIATELY BEFORE SMOKE ALARM ACTIVATED. PERFORMED OPERATIONAL CHECK OF LAVATORY SMOKE DETECTOR SYSTEM, WITH NO DISCREPANCIES NOTED. PERFORMED OPERATIONAL CHECK OF FWD GALLEY OVEN FOR 30 MIN ON HIGH, WITH NO DISCREPANCIES NOTED. PERFORMED OPERATIONAL CHECK OF RT PACK SYSTEM FOR SEVERAL HOURS, WITH NO DISCREPANCIES NOTED. REPLACED NR 2 PACK WATER SEPARATOR BAG AS PRECAUTIONARY.