Final answer:
The APU shutdown cycle is verified complete by monitoring parameters such as oil temperature and pressure, and conducting a shutdown test.
Step-by-step explanation:
The APU (Auxiliary Power Unit) shutdown cycle is verified complete by monitoring various parameters and conducting tests.
One way to verify the completion of the shutdown cycle is by checking the APU oil temperature and pressure. Once these parameters reach a specified range, it indicates that the APU is properly shut down.
In addition, a test called the APU shutdown test can be performed. This test involves simulating a shutdown sequence and monitoring various APU parameters to ensure they respond correctly.