As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED. CAPTAIN REPORTED RIGHT MAIN TANK LOST 1500 LBS OF FUEL AND THE FUEL CONFIGURATION LIGHT ILLUMINATED. RIGHT PUMPS SHUT OFF TO EMPTY CENTER TANK. AFTER CENTER TANK WAS AT 0 IT ROSE AGAIN TO 400 LBS WHEN RIGHT TANK PUMPS WERE TURNED ON AGAIN. ACCOMPLISHED FIM 28-22-00 AND FIM 28-21-00 WITH NO FUEL TRANSFER NOTED. OPERATIONAL CHECK GOOD.