What could be a potential outcome of disregarding environmental control system checks?

Disregarding environmental control system checks can lead to a heightened risk of adverse cockpit conditions. The environmental control system is crucial for maintaining temperature, humidity, and air quality within the cockpit and cabin. If these systems are not regularly checked and maintained, it can result in situations such as overheating, excessive humidity, or carbon dioxide buildup, which can significantly impair pilot performance and decision-making ability.

In adverse conditions, the crew may experience discomfort or even incapacitation, which can compromise flight safety. Therefore, thorough checks of the environmental control system are essential to ensure a safe and operational flying environment, preventing any negative impact on the aircraft's performance and crew efficiency during flight operations.

The other options, while they represent positive aspects of well-functioning systems, do not directly address the risks associated with neglecting system checks.