As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SAN - FLT 3155 - AIR TURN BACK DUE TO SMOKE SMELL IN CABIN. DECLARED EMERGENCY. AIRCRAFT LANDED SAFELY WITHOUT INCIDENT. PERFORMED DETAIL INSPECTION AND PERFORMED OPERAITONAL CHECK OF AIR CONDITIONING SYSTEM. PERFORMED ENGINE RUNS IAW AMM. NO DEFECTS NOTED AT THIS TIME. PERFORMED FUNCTIONAL CHECK FLIGHT WITH NO DISCREPANCIES NOTED. AIRCRAFT RETURNED TO SERVICE. (M)