As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SMOKE IN THE CABIN WITH SMOKE DETECTORS GOING OFF. EMERGENCY RETURN INITIATED. SMOKE IN THE CABIN WITH TWO PACKS OPERATING. COMPRESSOR DISCHARGE TEMP LESS THAN 150 DEGREES, FLAPS UP AND LANDING GEAR DOWN. MAINTENANCE REPLACED 35 DEG CONTROLLER AND ACCOMPLISHED A BREATHER PRESS CK, SYS CKS GOOD.