What is the allowable operating temperature range for the APU in the C-130J?

The allowable operating temperature range for the APU in the C-130J is indeed from -40°F to 120°F. This wide range reflects the versatility and robustness of the APU, enabling it to function effectively in extreme cold conditions, which is critical for operations in varied environments, including arctic regions. The capability to operate from extremely low temperatures ensures that the APU can start and provide necessary power to the aircraft even in harsh conditions, which is vital for pre-flight preparations and essential systems operation. Additionally, the upper temperature limit allows the APU to operate effectively during hot weather scenarios, ensuring reliability and functionality when ambient temperatures rise. This broad operational range is crucial for maintaining operational readiness in diverse mission profiles encountered by the C-130J.