What was found
AT CRUISE NOTIFIED ELECTRIC SMOKE & FUMES IN CABIN. SMELL & FUMES INCREASING RAPIDLY THROUGHOUT CABIN. RAN CHECKLIST AND SMOKE AND FUMES STOPPED AFTER TURNING RECIRC FANS & UTILITY & IFS/PASS OFF. GROUNDED - YES. PERFORMED CABIN ODOR T/S PER B737-800 FIM 05-51 TASK 814. FOUND RH RECIRC FAN PRODUCING FUMES AND NOISE. NO OTHER DEFECTS FOUND. REMOVED AND REPLACED RH RECIRCULATION FAN IAW B737-800 AMM 21-25-02-400-801. ALSO REMOVED AND REPLACED RECIRCULATION HEPA AIR FILTER IAW AMM 21-25-01-000-801. OPS CHECK AND LEAK CHECKS GOOD.