As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMBOUT OF DFW AT 10,000 MSL, SMOKE APPEARED IN THE COCKPIT WITH A STRONG BURNING ODOR. APPROPRIATE CHECKLISTS WERE ACCOMPLISHED AND TURNED BACK TO DFW. PACK NR 1 AND BLEED 1 WERE SECURED AND THE ODOR SUBSIDED IMMEDIATEDLY. UNEVENTFUL LANDING IN DFW. UPON INSPECTION FOUND NR 1 ACM LOCKED UP. REMOVED AND REPLACED NR 1 ACM AND SYSTEM OPS CHECKED GOOD PER AMM 21-51-03.