What is the purpose of ensuring the APU emergency controls are in the correct position?

Ensuring the APU emergency controls are in the correct position is crucial for maintaining safety during emergency scenarios. The main role of the APU in an aircraft is to provide power and air for the engines and systems when the main engines are not running. In emergencies, proper positioning of these controls ensures that the APU can function correctly, delivering the necessary power to critical systems. This is vital, as it can help maintain control over the aircraft and allow for safe operation during various emergencies, such as engine failures or power losses.

Properly configured emergency controls provide the crew with the ability to quickly access and utilize the APU's capabilities under high-stress conditions, ultimately contributing to the safety and survivability of the aircraft and its occupants.