As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON FLIGHT 2761 ON TAKEOFF A TRAILING AIRCRAFT REPORTED A WHITE TRAIL COMING FROM THE RIGHT WING. THE CREW REPORTED, OBSERVED A FUEL IMBALANCE AT 400 POUNDS. THE CREW DECLARED AN EMERGENCY AND LANDED WITHOUT INCIDENT. THE AIRCRAFT WAS REMOVED FROM SERVICE. REMOVED AND REPLACED THE RIGHT WING FUEL FLAPPER CHECK VALVE IAW EMB145 AMM 28-11-04. THE AIRCRAFT WAS RETURNED TO SERVICE.