As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED HEAVY SMOKE IN COCKPIT AND PERFORMED EMERGENCY DECENT IAW CHECKLIST. SUBSEQUENT INSPECTION FOUND VENT BLOWER DISPLAYED HEAT DAMAGE AND APPARENT BEARING FAILURE. ALSO FOUND SUPPLY HOSE TO PILOT'S LT BRAKE MASTER CYLINDER HEAT DAMAGED. REPLACED BLOWER ASSY WITH O/H UNIT, SAME PN, EM603-9. ALSO REPLACED BRAKE HOSE, PN 114-580098-1 WITH NEW. POST MAINTENANCE OPS CHECKS REVEALED NO FURTHER DEFECTS.