As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
2000 LB FUEL IMBALANCE 3HRS INTO FLT (L8000 R10000) NO LEAK. BALANCED TANKS. IMBALANCE STARTED AGAIN. RAN BOTH LEFT BST PUMPS FOR 20 MINUTES, CONFIRMED CROSSFEED VALVE OPERATION NORMAL. OBSERVED NO FUEL MIGRATION OR IMBALANCE AT THIS TIME.