What was found
DURNING CRUISE @ 380,FA`S IN REAR OF AIRCRAFT SAID THEY SMELLED "DIRTY SOCK"FUMES. PUT PACK 2 OFF AND CLOSED XBLEED,FA`S REPORTED NO CHANGE PACK 2 ON,THEN PACK 1 OFF. FA`S REPOERTED FUMES WERE BETTER AND IMPROVING.CONT`D ON TO KDTW AND WHEN P WAS LESS THAN 1.0 PSI WE SHUT OFF PACK 2 AND OPENED RAM AIR . AFTER RAM AIR OPEN FA`S REPORTED NO FUMES.-PERFORMED LEVEL A DECONTAMINATION OF THE ECS IAW AMM 21-00-00-615-802-A NO CABIN ODOR NOTED.