What was found
AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED DUE TO: ORDER FUME IN AFT OF PLANE, WORSE IN AFT GALLEY OILY MUSTY SMELL THAT MADE EYES WATER. COULD NOT DETERMINE SOURCE; AIRCRAFT DIVERTED TO AND LANDED SAFELY AT ELP. ACCOMPLISHED SOF TROUBLESHOOTING WORKCARD 08L00021001. FOUND SOURCE OF ODER TO BE CLOGGED AFT DOOR SILL DRAIN VALVE. REMOVE AND REPLACED DRAIN VALVE. ALL OPERTIONAL AND LEAK CHECKS GOOD. PER AMM 38-31-06.