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and maintenance program for all types of continuous-loop systems should include the following visual checks. These procedures are examples and should not be used to replace the applicable manufacturer’s instructions. 

Sensing elements of a continuous-loop system should be inspected for the following: 

1. Cracked or broken sections caused by crushing or squeezing between inspection plates, cowl panels, or engine components. 

2. Abrasion caused by rubbing of the element on cowling, accessories, or structural members. 

3. Pieces of safety wire or other metal particles that may short the spot-detector terminals. 

4. Condition of rubber grommets in mounting clamps, which may be softened from exposure to oils or hardened from excessive heat. 

5. Dents and kinks in sensing element sections. Limits on the element diameter, acceptable dents and kinks, and degree of smoothness of tubing contour are specified by the manufacturer. No attempt should be made to straighten any acceptable dent or kink, since stresses may be set up that could cause tubing failure. (See illustration of kinked tubing in Figure 9-14 .) 

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