As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON FLIGHT 2981 DEPARTURE CONTROL CONTACTED THE CREW AND REPORTED A POSSIBLE FUEL LEAK FROM THE LEFT WING. THEY OBSERVED A WHITE VAPOR/SMOKE COMING FROM LEFT WING. THE CREW DECLARED AN EMERGENCY AND RETURNED TO DFW. THE AIRCRAFT LANDED WITHOUT INCIDENT. THE AIRCRAFT WAS REMOVED FROM SERVICE. REMOVED AND REPLACED THE LEFT WING FLAP VALVE IAW EMB 135 AMM 28-11-04. NO DEFECTS NOTED. THE AIRCRAFT WAS RETURNED TO SERVICE.