What was found
(CAN) CREW REPORTED A VERY LOUD NOISE FROM F/O WINDSHEILD AT 21000 FT.. THEY STOPPED CLIMB AT 25,000 FT AND RETURNED. NOISE STOPPED AT 15000 FT. UPON INSPECTION THEY FOUND CAPT`S WIPER MOTOR LEAKING BADLY AND FOUND TORN SEAL, SEAL REPLACED, FOUND F/O`S NR 2 WINDOW, SLIDING WINDOW, LEAKING SO THE NR 2 WINDOW WAS RERIGGED AND WINDOW SEAL REPLACED. ALSO DUE TO THE FACT THAT THE CAPT`S NR 1 WINDOW WAS REPLACED THE PREVIOUS NIGHT THE NR 1 WINDOW WAS REMOVED THE FRAMES CLEANING AND CHECKED AND THE WINDOW REINSTALLED.