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: ON CLIMB OUT GOT A FUEL IMBALANCE INDICATION WITH APPROXIMATELY 1500LB BETWEEN LEFT AND RIGHT TANKS. AIRCRAFT AIR INTERRUPTED BACK TO AND LANDED SAFELY AT DFW. PERFORMED FQIS BITE TEST, NO INFLIGHT FAULT AND FAULT HISTORY FOUND PER FIM 28-41-00-810-801. REMOVED AND REPLACED FUEL QUANTITY PROCESSOR UNIT. PER AMM 28-41-81. OPERTIONAL CHECK GOOD.