What was found
DFW - FLT 3863 - DURING TAXI OUT 'SMELLED SOMETHING BURNING IN COCKPIT, NO VISUAL OF SMOKE'. RETURNED TO GATE. MTX REPLACED EXTRACTION FAN. AIRCRAFT RETURNED TO SERVICE. (X)
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
DFW - FLT 3863 - DURING TAXI OUT 'SMELLED SOMETHING BURNING IN COCKPIT, NO VISUAL OF SMOKE'. RETURNED TO GATE. MTX REPLACED EXTRACTION FAN. AIRCRAFT RETURNED TO SERVICE. (X)