What was found
FUEL IMBALANCE ANNUNCIATOR APPEARED AFTER TAKEOFF. APPROX 3 MINUTES AFTER T/O ROLL NOTICED THE IMBALANCE AND SAW 700 LB IMBALANCE. DURING NEXT FEW MINUTES NOTICED INCR TO 900 LBS, MAIN TANK1 WAS 5.9, RIGHT TANK 6.6 INITIALLY. QRH PROCEDURE BALANCED FUEL TO NORMAL. NO FUEL LEAK NOTED, TOTAL QUANTITY PLANNED, FF NORMAL. FUEL IN BALANCE AT PUSH PRIOR TO TAKEOFF. ANNUNCIATOR WENT OUT AS EXPECTED WITHEN 200 LBS. GROUNDED - YES. PERFORMED FUEL CROSSFEED VALVE OPERATIONAL TEST PER TASK 28-22-21-710-801. ALL NORMAL OPS. PERFORMED FQIS OPERATIONAL TEST PER TASK 28-41TASK 801. NO CURRENT FAULTS & GROUND TEST PASS, NO HISTORY.