What should technicians avoid when repairing electrical issues in aircraft?

Using non-insulated tools carelessly is critical to avoid when repairing electrical issues in aircraft due to safety concerns. Non-insulated tools, if mishandled, can inadvertently create short circuits or lead to electric shock when working on live circuits. Insulating tools help to minimize the risk of accidental contact with energized components, thus protecting technicians from potential injuries.

In the context of aircraft maintenance, the environment poses specific risks, including the presence of high-voltage circuits and sensitive electronic systems. Consequently, it's essential for technicians to prioritize safety by using properly insulated tools and to exercise caution in their handling to prevent accidents or damage to aircraft systems. The other options, such as testing circuits, logging repairs, and wearing protection, are typically seen as necessary practices in technical repair work, enhancing safety and ensuring proper documentation.