As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PHX - GTB - LOG - 7194805 - STARTING ENGINES AND DURING TAXI OUT FLIGHT ATTENDANT NOTIFIED THE FLIGHT DECK OF A STRONG SMOKE SMELL (LIKE ELECTRICAL OR CIGARETTE SMOKE) THROUGHOUT AFT CABIN. THE CREW RETURNED TO THE GATE. MAINTENANCE REMOVED AND REPLACED THE RECIRCULATION FAN PER BMM 21-21-22-4. RAN THE ENGINES AND PACKS, OPS CHECK GOOD