As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON TAXI-OUT, CREW RECEIVED A SMOKE DETECTOR FAULT. CREW REPORTED PASSENGERS COMMENTED THAT THEY SMELLED SMOKE. ACFT RETURNED TO THE GATE. MX TROUBLESHOT SMOKE DETECTION SYS IAW TSM 26-17-00-810-803-A. REPLACED SMOKE DETECTOR 1WQ, LAV A, AND ACCOMPLISHED SUCCESSFUL SYS TEST IAW AMM TASK 26-17-15.