What was found
AIRCRAFT WAS GROUNDED, FLIGHT ATTENDANTS REPORTED AN ODOR SMELLING LIKE BURNING WIRE COMING FROM THE AFT LEFT GALLEY. BELIEVED TO BE ORIGINATING FROM THE PLASTIC COVER ON THE NO SMOKING AND SEAT BELT SIGN ABOVE BIN 525. DURING TROUBLE SHOOTING JC 08L00021001, DETERMINED LIGHT BULBS IN THE SEAT BELT AND NO SMOKING SIGN ABOVE BIN 525 WERE BURNED OUT. REPLACED THE BULBS IN THE SIGN IAW AMM 33-25-00. OPS CHECKED GOOD.