What was found
RETURNED TO DEPARTURE DUE TO THE RIGHT FUEL QUANTITY BLANKING AND RECEIVED A FUEL QTY INDICATION STATUS MESSAGE. PERFORMED FQIS BITE FOUND RT MAIN TU6 & 7 CONTAMINATED. PERFORMED CONTAMINATION TEST, RESULTS NEGATIVE. RESET THE PROCESSOR, QUANTITY INDICATION RESTORED, AFTER 15 MINUTES QUANTITY BLANKED AGAIN. R & R THE NR 6 AND 7 FUEL QTY TANK UNITS IN THE RT WING IAW AMM 28-41. BITE CHECKED GOOD. R & R FUEL QTY PROCESSOR IAW AMM 28-41. BITE CHECKED GOOD.