As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WO 208-146219 FLIGHT 7775 DISCREPANCY. PILOT TURNED ON BLEED AIR IN FLIGHT & BEGAN TO SMELL TKS. SHORTLY AFTERWARD THE CABIN FILLED WITH A CLOUD OF TKS VAPOR COMING FROM THE BLEED AIR VENTS. LANDED NORMALLY WITHOUT INCIDENT. CLEANED AIR INTAKE & COWLING. TEST RAN WITH HEATER BLEED AIR ON HIGH, TEMP ON HIGH & COULD NOT DUPLICATE ON GND. ACFT RETURNED TO SERVICE.