As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIR TURNBACK FLT 7584 RAP: COCKPIT BECAME CONTAMINATED WITH SMOKE AFTER TAKEOFF. AIRCRAFT RETURNED TO RAP AND LANDED WITHOUT INCIDENT. NO INDICATION OF FIRE WAS OBSERVED. MAINTENANCE REMOVED AND REPLACED AIR COOLING TURBINE. AIRCRAFT RETURNED TO SERVICE.