What was found
UPPER AN818-6D, FITTING CRACKED IN 2 LOCATIONS OVER 50 PERCENT OF THE LENGTH OF THE FITTING. LINE AND FITTING ARE INSIDE THE CABIN PRIOR TO THE FUEL SELECTOR ABOVE ELECTRICAL WIRES. A FAILURE AT THIS LOCATION WOULD CAUSE THE DRAINING OF THE RT FUEL TANK IS EMPTY. THIS WOULD PRODUCE A SIGNIFICANT RISK OF FIRE AND OR EXPLOSION AND FUEL STARVATION IF THE RT TANK IS SELECTED. CRACK WAS FOUND WHILE WORKING ON ANOTHER MINOR ISSUE IN THE AREA OF THE FITTING.