What was found
FLIGHT ATTENDANT REPORTS BURNING ELEC SMELL COMING FROM REAR OF ACFT AROUND ROW 36. SMELL GOES AWAY WHEN LIGHTS GO OUT. COMPLIED WITH CABIN ODOR & SMOKE TROUBLESHOOTING CARD 21-059-002, DID NOT FIND ANY ELEC ODORS IN BACK OF CABIN, FOUND LAMP SOCKET OVER 36 AC WAS BURNED OUT & HAD BEEN PLACED ON MEL 33-02 SIT 1 CAT C DMI 17325. LAMPS WERE REMOVED BUT BALLAST WAS STILL ACTIVE. THERE WAS A SLIGHT ELEC SMELL IN BALLAST & SOCKET AREA. REPLACED SOCKET & BALLAST. SYS OPERATIONS CHECKED GOOD. NO ELEC ODOR IN CABIN WITH UPPER SIDEWALL LIGHT & LOWER SIDEWALL LIGHTS ON IAW AMM 33-21-03 & TASK CARD 21-059-002.