As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DFW - FLT 0425 - AFTER TAKEOFF DFW DURING CLIMB-OUT, ACRID ODOR NOTED IN CABIN. AIRCRAFT RETURNED TO DFW AND LANDED WITHOUT INCIDENT. REPLACED LT AND RT COALESCER BAGS AND ACCOMPLISHED PACK BURN-OUT PROCEDURE. SYSTEM GROUND CHECKED NORMAL OPERATION WITH NO ODOR NOTED. (X)