What was found
MELTING PLASTIC OR WIRING SMELL WAS NOTICED AT THE TOP OF CLIMB AND DISSIPATED AFTER TWO MINUTES. SMELL RETURNED DURING DESCENT WHILE PASSING THROUGH 140 FT, AGAIN DISSIPATING AFTER TWO MINUTES. SMELL WAS COMING FROM ROW EIGHT FORWARD. INSPECTED FWD COMPARTMENTS, BITE CHECKED ON BOARD SYSTEMS INCLUDING LIGHTING, RAN BOTH ENGINES AND PACKS FOR 15 MINUTES. ALSO RAN GALLEY EQUIPMENT, NO PROBLEMS FOUND.