As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DFW - FLT 3507 - THE FLIGHT CREW REPORTED SMOKE BOTH CABIN AND COCKPIT WHEN BOTH PACKS WERE SELECTED. PASSENGERS WERE EVACUATED. NO INCIDENTS REPORTED. APU PUT ON MEL AT THIS TIME. MAINTENANCE REMOVED AND REPLACED APU IAW EMB MM. OPERATIONAL AND LEAK CHECK WAS SATISFACTORY AND AIRCRAFT WAS RETURNED TO SERVICE. (M)