What was found
FLIGHT ATTENDANT CALLED UP COMPLAINING OF BURNING SMELL BETWEEN ROWS 18 - 21. AFTER 7 MINUTES SMELL WENT AWAY. COMPLIED WITH TASK CARD F0592102 CABIN ODOR, SMOKE & TROUBLE SHOT. LOUD GRINDING NOISE COMING FROM CABIN FLOOR AT ROWS 15 - 18 LT SIDE. PULLED CARGO COMPARTMENT HEATER BREAKERS & GRINDING NOISE SILENCED. R & R FWD CARGO COMPARTMENT HEATING FAN IAW AMM 21-41-02, OPERATIONS CHECKED GOOD PN ON 25130-1 ROW 12CA BALLAST INOPERATIVE. REPLACED BALLAST & OPERATIONS CHECKD GOOD IAW AMM 33-21-03 PN ON D773-11-00.