What was found
A PASSENGER SITTING IN 15A NOTICED A STRONG ELECTRICAL ODOR DURING THE DESCENT. THE ACFT LANDED WITHOUT INCIDENT. THE ACFT WAS REMOVED FROM SERVICE. COULD NOT FIND ANY ELECTRICAL BURNING ODOR. AS A PRECAUTIONARY ACTION THE NR 4 EMERGENCY LIGHT BATTERY PACK WAS R & R. ALSO, THE 15A SEAT AREA CEILING AND SIDE WALL LAMPS WERE R & R IAW AMM 33-21-06. FLUORESCENT LAMP, PN: 5113WW. THE FUNCTIONAL CHECK FLIGHT WAS SATISFACTORY. THE ACFT WAS RETURNED TO SERVICE.