Is it safe to assume that the GPU can be disconnected solely based on departure time?

When considering the safe operation of ground equipment like a Ground Power Unit (GPU), it's important to recognize that departure time alone should not dictate whether the GPU can be disconnected. Several factors impact this decision, which include the specific needs of the aircraft, the readiness of available ground services, and the protocols established by the airline.

For instance, different aircraft models may have varied requirements for power and systems checks before departure. Additionally, operational priorities and safety procedures can call for the GPU to remain connected until vital systems are fully operational and the aircraft is ready for take-off.

Therefore, it is not solely the departure time that determines whether the GPU can be disconnected; other operational considerations must be assessed to ensure safety and compliance with standard operating procedures. This consideration highlights the complexity of aircraft ground operations and the importance of not relying on a single factor when making safety-related decisions.