Read each Thread and reply with your own thought. Each reply must be at least 150 words. Additionally, each thread and reply must contain at least 1 reference. Thread 1 The concept I chose is the trouble shooting concept. First determine what constitutes normal operation for the system being tested. Second analyze the symptom of the problem. Third detect and isolate the problem. Fourth make repairs as necessary to correct the problem. Last perform an operational test to verify that the repairs corrected the problem (Kenney, 2013). The example is a problem I ran into this week, the person in the cockpit had reported the bathroom light did not work. There is a red bulb and a white bulb that work off of a single pole three position switch. One is for the red, the other is for the white and the middle position is off. So, I asked if one of the lights were out or both? The response was both. So, I can assume that we have both bulbs blown, a bad switch, or a circuit breaker out. As I went up to look, I saw the circuit breaker was in, I tested the switch by turning it on in both positions and the problem was confirmed, no light. I was taking the lens off when another person said the right system hydraulics will not come on. Then I started noticing other components not working. Someone had turned off a switch to the second D.C buss. We switched it back on and everything came back up. It was pretty simple once the problem was tested, isolated, system knowledge was applied, repaired, and then operationally checked out. Thread 2 All matter has their own way of storing electricity depending on what are they are exposed to. When one matter comes in contact with another one and their charges are different you will experience a sudden zap during that quick transfer of energy. This is a brief description per this week’s reading about static electricity. As and aircraft mechanic I perform a lot of refuels. The airplane I work on have the capability of transferring fuel to other aircrafts in mid-air. We refer to this type of airplanes as tankers. Before commencing a pressure refuel operation, the aircraft needs to be grounded to the Earth as well as bonded to the vehicle providing the fuel. As Kenny mentions in his book, one way to create static electricity is with friction (Kenny, 2013). That is exactly what is happening during the refueling operation. Since we know all matter on Earth will have different charges (protons, electrons, neutrons), bonding the aircraft to refueling truck before beginning the refuel will ensure these two vehicles remain electrically balance. As for the grounding, this will allow a pathway for electrical charges to easily travel and avoid an overcharge during the friction created during the refueling operation.