AFTER A FLC'S DECLARATION OF AN EMER; A SMOKE FILLED ACFT RETURNED TO LAND.

Narrative

AFTER TKOF BTWN 400-1000 FT AGL; SMOKE ALARM IN FORWARD LAVATORY WENT OFF; CABIN FILLED WITH SMOKE. DECLARED EMER AND RETURNED TO ATL; SMOKE DISSIPATED ON THE GND; ELECTED NOT TO EVAC; TAXIED TO GATE. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THIS RPTR STATES THAT THE FORWARD LAVATORY SMOKE ALARM SOUNDED JUST AFTER ROTATION IN THE BOEING 737-200. THE CABIN CREW SIMULTANEOUSLY; INITIATED CONTACT THROUGH THE INTERPHONE. THE RPTR THEN; DELEGATED THE FLYING TO THE FO; TO MEET THE EMER. APPARENTLY; THE CABIN CREWMEMBER WAS PANICKED; AND TIME WAS LOST IN THE EXCHANGE OF CABIN CREWMEMBERS ON THE INTERPHONE. THE RPTR DIRECTED THE FLT ATTENDANT TO SEARCH THE RECEPTACLES; AND GALLEYS; AS THE ACFT RETURNED TO LAND. ON APCH; THE SMOKE DISSIPATED. THE PROB; LATER; WAS THOUGHT TO HAVE BEEN CAUSED BY OIL ON THE AIR CONDITIONING PACK FAN; WHICH HAD BEEN CHANGED DURING THE NIGHT PRECEDING THE FLT. THE TKOF MAX PWR BROUGHT MAX HEAT TO THE COMPONENTS; WHICH CAUSED EXCESSIVE SMOKE TO ENTER THROUGH THE AIR CONDITIONING DUCTS IN THE CABIN. THE SMOKE/SMELL WAS NOT OBVIOUS TO THE FLT DECK CREW BECAUSE THE AIR CONDITIONING SOURCE FOR THE EYEBALL VENTS IN THE COCKPIT; IS SEPARATE. THERE WERE NO INJURIES -- THE PAX WERE DEPLANED NORMALLY; AT THE GATE.