As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) AFTER DEPARTURE FLIGHT CREW REPORTED THAT THE CROSS FLOW PUMP CAME ON AND THEY GOT A FUEL IMBALANCE OF 600-700 LBS. THEY WERE UNABLE TO RECTIFY THE PROBLEM WITH THE QRH AND ELECTED TO RETURN TO DEPARTURE. MAINTENANCE REPLACED THE FUEL QUANTITY COMPUTER IAW AMM 28-41-22 AND THE ACFT WAS RETURNED TO SERVICE, PN 738118-1-4, SN 0124.