What was found
ON TAKEOFF ROLL FLIGHT CREW REPORTED STRONG SMELL OF RUBBER IN COCKPIT & CABIN. FLIGHT ATTENDANTS REPORTED A STRONG ELECT SMELL, WOULD COME & GO DURING ALL PHASES OF FLIGHT, BECAME STRONG AGAIN ON DECENT AT 4K THROUGHOUT ACFT. NO SMOKE REPORTED. TRACKED ODOR TO SEAT ROWS 12LT & 20RT. IT APPEARS THAT BOTH LED TRACK LIGHT ARE SHORTED. FOUND LIGHT TRACK AT 12LT WITH 2 BROKEN WIRES. AMM CONDITIONAL INSPECTION PERFORMED. LIGHTS & FILTERS REPLACED.