As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DFW - DURING TAKEOFF OTHER AIRCRAFT AND TOWER REPORTED SMOKE COMING FROM ENGINE. CREW REPORTED NO ABNORMAL ENGINE INDICATIONS. EMERGENCY DECLARED FLIGHT RETURNED DFW LANDED WITHOUT INCIDENT. AIRCRAFT REMOVED FROM SERVICE. DECLARED LEFT ENGINE CHANGE DUE TO BREATHER PRESSURE TEST FAILURE. REPLACED LEFT ENGINE AT DFW ON 10/10/2010. SYSTEM GROUND CHECK NORMAL OPERATION.