What was found
(CAN) ODOR SIMILAR TO THE SMELL OF BURNING RUBBER COMING FROM THE AREA OF THE AFT LAVATORIES. UNABLE TO ISOLATE OR IDENTIFY. ODOR HAS DISSIPATED AND FLIGHT CONTINUING. MOC ADVISED. FOUND CHEMICAL ODOR COMING FROM THE SINK DRAIN, DRAIN FLUSHED WITH WATER AND CLEANED WITH ALL CLEAR GALLEY SINK DRAIN OPENER. HEATERS REACTIVATED, CIRCUIT BREAKERS RESET AND NO MORE CHEMICAL ODORS. RIBBON HEATER DID NOT REQUIRE REPLACEMENT AT THIS TIME.