As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
UNWANTED FUEL TRANSFER. *S/D* THE SHAFTS TO BOTH JETTISON TRANSFER VALVES IN THE CENTER TANK WERE BROKEN. DUE TO PRESSURE IN THE MANIFOLD, THE VALVE BODY WAS FREE TO FLOP OPEN AND CAUSED THE FUEL IMBALANCE PROBLEM. REPLACED TRANSFER VALVES, OPERATION CHECKS NORMAL.