What was found
AIRCRAFT IN BASE MAINTENANCE: ON CLIMB OUT, BETWEEN 7 AND 8000 FEET THERE WAS AN IMBALANCE NOTED OF APPROXIMATELY 1500 LBS BETWEEN LEFT AND RIGHT TANK FUEL, WITH THE RIGHT TANK BEING LOW. AN OBSERVER WAS SENT TO SEE IF AIRCRAFT WAS VENTING FUEL AND NO INDICATIONS WERE FOUND. BOTH ENGINES WERE OPERATING NORMALLY WITH NORMAL FUEL FLOWS. AN EMERGENCY WAS DECLARED AND RETURNED TO DEPARTURE AIRPORT, ARFF REQUESTED. NO INDICATIONS OF FUEL LEAK WAS FOUND BY FIRE CHIEF. MAINTENANCE TROUBLESHOT IAW FIM 28-41-00-810-814. PERFORMED FQIS BITE PROCEDURE WITH NON FAULTS FOUND. GROUND TEST PASSED. FIM INDICATES THERE WAS AN INTERMITTENT PROBLEM.