What conditions necessitate the use of PTMS external cooling during towing operations?

The use of PTMS (Power Thermal Management System) external cooling during towing operations is necessitated by excessive ambient temperatures or prolonged exposure to sunlight. In such conditions, the internal systems of the F-35 may generate heat that can exceed acceptable operational limits. The thermal management system is designed to ensure that critical systems remain within safe temperature ranges, thus maintaining operational integrity and preventing heat-related damage.

High ambient temperatures can directly impact the performance of avionics, engines, and other sensitive equipment. Prolonged exposure to sunlight can exacerbate these conditions, making external cooling essential for maintaining optimal operating temperatures and ensuring the safety of both the aircraft and crew during towing operations. This proactive measure helps mitigate risks associated with overheating, allowing for smoother and safer towing activities.