As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED DUE TO: FUEL IS CONTINUOUSLY GOING INTO THE CENTER TANK WITH CENTER PUMPS OFF. FUEL WILL NOT BURN BELOW 0.20 IN CENTER TANKS WITH PUMPS ON; AIRCRAFT EMERGENCY LANDED SAFELY AT ORD. REPLACED CENTRAL TANK COMPENSATOR (FISC). PER AMM 28-41-21-000-801 AND 28-41-21-400-801**(CLOSED).