As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SOMEONE ON GROUND REPORTED SMOKE COMING FROM NR 1 ENG. ALL ENG IND NORMAL. A/C FOLLOWING REPORTED SMOKE STOPPED ONCE AIRBORNE. RETURNED TO DFW, NO ADDITIONAL PROBLEMS. PERFORMED TEST Z OF SEC 4077 OF THE PFHB. BREATHER PRESSURE WITHIN LIMITS. INSP INLET/EXH NORMAL. ALL ENG PARAMETERS NORMAL AT T/O POWER.