What might be a consequence of not ensuring adequate ventilation during APU operations?

Ensuring adequate ventilation during APU operations is crucial for safety and performance. When ventilation is insufficient, the buildup of exhaust gases can occur, which poses increased safety risks, such as the potential for lethal carbon monoxide exposure and reduced visibility due to smoke. Proper airflow helps to disperse harmful emissions and prevents the accumulation of heat, minimizing the risk of fire or equipment malfunction.

In contrast, inadequate ventilation is unlikely to lead to decreased noise levels, improved air quality, or lower fuel costs, making the focus on increased safety risks the most relevant consequence of poor ventilation practices during APU operations. Proper ventilation ultimately creates a safer working environment for personnel and enhances the overall operational effectiveness of the equipment.