As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW RECEIVED A RECIRCULATION FAN SMOKE MESSAGE. FOLLOWED QRH, DECLARED AN EMERGENCY AND RETURNED TO DEPARTURE. LANDED WITHOUT INCIDENT. MAINTENANCE INSPECTED AND FOUND SPEED TAPE IN THE NR 1 PACK INLET. MAINTENANCE REMOVED TAPE AND PERFORMED OPS CHECK OF THE ACFT IAW AMM. AIRCRAFT IS GOOD FOR SERVICE.