As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MIA - INFLIGHT JFK-GRU. CREW REPORTED FUEL QUANTITY PROBLEM AND UNWANTED FUEL TRANSFER. EMERGENCY DECLARED, DIVERTED MIA LANDED WITHOUT INCIDENT. AIRCRAFT REMOVED FROM SERVICE. REPLACED FUEL QUANTITY PROCESSOR TANK UNIT. SYSTEM GROUND CHECKED NORMAL OPERATION.