What was found
CCS - FLT 2142 - AFTER TAKEOFF CCS-MIA, FUMES WITH SMELL OF BURNING RUBBER NOTED IN FORWARD AREA OF COACH CABIN. NO VISIBLE SMOKE DETECTED. AIRCRAFT RETURNED TO CCS AND LANDED WITHOUT INCIDENT. SMELL TRACKED TO UPPER FUSELAGE ANTI-COLLISIONS STROBE LIGHT. UPPER FUSELAGE ANTI-COLLISION STROBE LIGHT PLACARDED INOPERATIVE PER MEL. REPLACED UPPER FUSELAGE ANTI-COLLISION STROBE LIGHT AT IAH ON 8/30/99. SYSTEM GROUND CHECKED NORMAL OPERATION. (M)