What might occur if safety precautions are not followed during APU maintenance?

During APU maintenance, not following safety precautions can significantly increase the risk of accidents. Safety measures are crucial to protect personnel and equipment from potential hazards that could arise from working with the APU. For instance, the APU includes components that may be hot, pressurized, or contain hazardous fluids. Engaging in maintenance without adhering to safety protocols could lead to injuries such as burns, cuts, or exposure to toxic substances. Moreover, neglecting safety can compromise the operation of the APU itself, leading to incorrect adjustments or repairs that might result in malfunction or failure.

In contrast, enhanced efficiency, improved APU performance, and extended service life are outcomes that typically arise from properly performed maintenance done in adherence to safety standards. These outcomes depend on the effectiveness and accuracy of the maintenance process, which safety protocols help to ensure. Without these precautions, the focus shifts from enhancing performance or efficiency to mitigating the risks of harmful incidents.