What was found
ONE HOUR INTO CRUISE AT FL 320, F/A REPORTED FUMES IN BOTH AFT LAVATORIES. OVER TIME FUMES INCREASED IN INTENSITY AND F/A REPORTED EYE IRRITATION AND HEADACHES. ACFT GROUNDED. ACCOMPLISHED CABIN ODOR TROUBLESHOOTING IAW AMM 05-51 TASK 814 CONDITIONAL INSPECTION. NO FUMES OR ODOR DETECTED. CHECKED SYSTEMS IN AFT LAVATORY AREA, FOUND LAVATORY G WATER HEATER NOT WORKING PROPERLY. REMOVED AND REPLACED THE WATER HEATER IAW AMM 38-13-01-000-801/400-801. OPS CHECKED GOOD. COULD NOT DETECT ANY ODOR.