What was found
EN ROUTE WITH LT CENTER FUEL TANK PUMP OFF AND RT CENTER FUEL TANK PUMP ON, CROSS FEED VALVE CLOSED, NR 2 ENGINE WAS DRAWING FUEL SLOWLY FROM RT CENTER TANK AND ALSO RT MAIN TANK, DIVERTED, DUE TO WEATHER. MAINTENANCE TROUBLESHOT FUEL SYSTEM; NO DEFECTS FOUND. WHEN AIRCRAFT ARRIVED AS A PRECAUTION THE RT CENTER FUEL TANK BOOST PUMP REPLACED IAW BMM 28-22-41, OPERATIONAL CHECK WAS GOOD. PROBLEM RECURRED, RT WING TANK BURNED FUEL CONTINUOUSLY BEFORE CENTER TANK WAS EMPTY. MX R & R ALL THREE RT FUEL TANK BOOST PUMP CHECK VALVES IAW BMM. TEST FOUND FUEL BOOST PUMP SLOW TO RE-PRIME DUE TO AN ERODED HOUSING.