What was found
AT CRUISE, TRANSFERRING FUEL AS RT PUMP WAS TURNED OFF AIRCRAFT SHUDDERED WITH LOUD BANG NOISE. ELECTED TO STOP THE TRANSFER: AS PUMP WAS TURNED ON AGAIN AIRCRAFT AGAIN SHOOK WITH BANG NOISE. ALSO, NOTED A DROP IN FUEL FLOW TO RT ENG. INSPECTED RT WING BOOST PUMP-NO DEFECTS NOTED. DRAINED SMALL AMOUNT OF WATER FROM BOTH WING TANKS - OPS TESTED RT BOOST PUMP, OPS TEST OK. INSTALLED A REPAIRED CONDITION FUEL PUMP ON THE NR 2 ENGINE. PERFORMED OPS CHECK IAW LMM 72-00-00. (NO DEFECTS NOTED)