What was found
AFT CABIN CREW REPORTED A FOUL ODOR FROM GALLEY FORWARD TO ROW 23. THE AIRCRAFT WAS GROUNDED. MAINTENANCE FOUND ODOR TO BE FROM HYDRAULIC FLUID LEAKING FROM PTU MANIFOLD, YELLOW PORT B REDUCER. MAINTENANCE ACCOMPLISHED JC 26L00021001, 26L00021002, 26L00021004, AND REPLACED THE O-RING ON PTU MANIFOLD PORT B. PERFORMED A SATISFACTORY OPERATIONAL CHECK IAW AMM 29-23-41.