What are two precautions you must take when handling thermal switches?
a. Any two of the following: (1)Be cautious when handling these units because the shell is the actuating mechanism. Never handle the shell with pliers or force the switch into position either by hand or with tools, (2)Before, during, and after installation take precautionary measures to ensure that the shell is not dented, distorted, or otherwise damaged, (3)Use caution in securing the lock washer and hex nut on the positive terminal of the switch. When securing the terminal nut, use a torque wrench. Check current technical data for proper torque values, (4)Upon installation of a new switch, inspect the outer shell visually for evidence of any damage that could change the actuating point or prevent the switch from operating, (5)After the switch has been put into operation, always keep it free of dirt, dust, oil, grease, or any foreign substance that may accumulate on the switch and change the amount of heat required to actuate it, (6)Different locations on the aircraft require different heat ranges, so be certain that you install the correct type. The type number of the detector switch can be located on the unit’s mounting flange.