As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FUEL IMBALANCE OF ALMOST 1100 LBS. GROUNDED - YES. COULD NOT DUPLICATE DISCREPANCY. CREW ACARS INDICATE AIRCRAFT NOT CONFIGURED CORRECTLY. VERIFIED FQIS NO FAULTS NOTED.OPERATED CROSSFEED VALVE NO DISCREANCIES. OPS CHECK NORMAL. REF FIM 28-41 TASK 820 AC OK FOR SERVICE.