As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) PILOT REPORTED EXHAUST ODOR WHEN FRONT COMBUSTION HEATER WAS OPERATING. SOOT COLLECTED ON THE PILOT AND CO-PILOT WINDSHIELDS ABOVE THE DEFROST VENTS. COMPLETED A HEATER DECAY TEST WHICH CONFIRMED THE BURNER CAN WAS DEFECTIVE. REMOVED THE HEATER FROM THE AIRCRAFT AND DISCOVERED 2 HOLES IN THE BURNER CAN APPROXIMATELY .5 INCH WIDE AND OPEN ABOUT .2500 INCH. HEATER WAS REPLACED WITH OVERHAULED UNIT AND AIRCRAFT RETURNED TO SERVICES. (TC NR 20070115002)