What was found
AIRCRAFT WAS GROUNDED: ELECTRICAL SMOKE SMELL DURING FLIGHT AT FL340 ABOUT 3-5 MINS DURATION. THEN COMPLETELY DISSIPATED. SMELL CAME FROM AREA OF 2F-1RLAV AND THERE WAS EXCESSIVE "FAN" NOISE DURING THE EVENT WHICH ALSO WENT AWAY WHEN THE SMELL DID. MAINTENANCE PERFORMED T/S PER J/C 72L00021001. VERIFIED BURNING SMELL COMINGFROM LAV 2F-1R. SMELL WAS COMING FROM OVERHEAD DOME LIGHT. BULB WAS FOUND BURNT AND FOULED CONFIRMING THE BURNING ELECTRICAL SMELL WAS COMING FROM BURNT BULB. RELAPMED DOME LIGHT IAW AMM 33-26-00. OPS CHECK GOOD. SMELL IS NO LONGER PRESENT.