As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIR TURNBACK/DECLARED EMERGENCY -- TOWER NOTED SIGNIFICANT FLUID COMING FROM LEFT WING ON TAKEOFF AND ADVISED CREW AIRBORNE. COCKPIT VERIFIED LEAK, DECLARED EMERGENCY, AND RETURNED TO AND. DEFERRED PER MEL. ON 2-26-13, FLOAT SWITCH OPERATED NORMAL.