As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) ENGINE INLET ADAPTER HEATER BURNED OUT BOTH ELEMENTS WHEN SELECTED ON JUST PRIOR TO TAKE OFF. ENGINE BLEEDS WERE ON AND THE RESULTING SMOKE DRAWN THROUGH AIR CONDITIONING SYSTEM CAUSED A SEVERE BURNING SMELL IN AIRCRAFT. INTAKE HEATER NR 1 C/B TRIPPED, AIRCRAFT RETURNED TO HANGAR FOR INLET ADAPTER RE PLACEMENT.