What was found
AFTER T/O FROM CVG, PASSING THROUGH APPROX 11K AFT FLT ATT REPORTED ABNORMALLY HIGH PITCHED NOISE COMING FROM TAIL CONE AREA AND REPORTED FLUID LEAKING FROM O/H TAIL CONE. RETURNED TO CVG. CYCLED BOTH PACKS WITH NO EFFECT ON NOISE, NOISE STOPPED DESCENDING THROUGH 7K. REPLACED LT & RT WATER SEPARATOR BAGS, FOUND BOTH DRAIN SCREENS ON WATER BAG HOUSING CLOGGED. CLEANED SAME, FOUND RT WATER BAG HOUSING CHECK VALVE STICKING. REPLACED SAME, SYS CHECKS NORMAL.