What was found
(CAN) NR 1 CABIN CREW REPORTED, A FIRE (LIGHT GREY SMOKE LIKE THAT FROM A BURNING CANDLE) WHICH WAS HE HAD IMMEDIATELY PUT OUT WITH A FIRE EXTINGUISHER. THE SOURCE OF THE FIRE WAS A FRONT DOOR BOARDING LIGHT, 3RD STEP. THE PAX WERE DISEMBARKED NORMALLY VIA THE REAR EXIT ONLY AND ENGINEERS WERE CALLED. THE LIGHT ASSEMBLY WAS REPLACED AND THE AIRCRAFT WAS RETURNED TO SERVICE.