What was found
PROBLEM: DURING DEPARTURE FROM KJWN THE FLIGHT CREW ENCOUNTERED THE FOLLOWING:" SMOKE NOTED IN CABIN. APPEARED TO COME FROM AREA JUST FORWARD OF LUGGAGE AREA". THE AIRCRAFT DIVERTED TO KPIT AND LANDED WITHOUT INCIDENT. RESOLUTION: CONTRACT MAINTENANCE WAS CALLED TO THE AIRCRAFT AND COMPLETED THE FOLLOWING. FOUND LH AFT CABIN HEATER WITH BURNT SMELL AND SMOKED DURING OPERATIONAL CHECK. REMOVED AND REPLACED LH AFT CABIN HEATER PN ON/OFF 959.90.20.405 SN ON: 1-F772211-3, SN 1-F772310-2 IAW AMM PC24-A-E21-40-0002-00A-520A-A, PC24-A-E21-40-0002-00A-720A-A OPS CHECK GOOD, NO DEFECTS NOTED.