What was found
DURING ANNUAL INSPECTION A HEATER DECAY TEST WAS PERFORMED. THE HEATER FAILED THE TEST AND WAS REMOVED FROM THE AIRCRAFT. A SUBSEQUENT PRESSURE TEST WAS DONE ON THE BENCH. TWO LARGE CRACKS WERE FOUND AT THE WELD JOINTS BETWEEN THE INNER COMBUSTION TUBE AND TWO OF THE CROSS OVER PORTS. THIS HEATER WAS INSTALLED AS OVERHAULED AND HAS LESS THAN 100 HOURS OF OPERATION. A FAULTY WELD MAY BE A CONTRIBUTING FACTOR. RECOMMEND REGULAR DECAY TESTING.