What was found
ON APPROACH TO DFW FAS REPORTED FUMES AND A VAGUE ELECTRICAL SMELL FROM ROWS 15 THROUGH 17. ROUGHLY 1 MINUTE LATER THE SMELL DISSIPATED AND WAS NOT PRESENT FOR REMAINDER OF FLIGHT. NO INDICATIONS OF SMOKE IN COCKPIT (FLIGHT 3086 - FILED CLOSED) TROUBLE-SHOT PER FIM 21-22-00-810-806 AND FOUND AED AND #4 EMERGENCY BATTERY PACK AND CHARGER ASSEMBLY TO BE ONLY SOURCED OF FAINT SMELL. REMOVED AND REPLACED #4 EMERGENCY BATTERY PACK AND CHARGER ASSEMBLY IN REFERENCE TO AMM 33-51-17. OPS CHECK GOOD IN REFERENCE TO AMM 33-51-00. AIRCRAFT IS ACCEPTABLE FOR RETURN TO AND CONTINUED SERVICE. / PLEASE REFERENCE AML 748986