As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED SMOKE IN CABIN AFTER TAKEOFF. ACFT AIR RETURN BACK TO DEPARTURE. MAINTENANCE INSPECTED AND FOUND HOSE TO NR 1 RECIRCULATION FAN MUFFLER CAUSING CONDENSATION TO POUR IN THE CABIN THROUGH THE LOWER VENTS AT THE CENTER AISLE. MAINTENANCE RESECURED HOSE AND PERFORMED A SUCCESSFUL OPS CHECK. ACFT WAS APPROVED FOR RETURN TO SERVICE.