What should be done if ice is found on the APU inlet door?

In the event that ice is found on the APU inlet door, it is critical to refrain from operating the APU. Ice accumulation can obstruct airflow, leading to potential engine damage or inefficiencies in operation. The APU relies on a consistent flow of air for optimal performance, and any blockage such as ice could cause overheating or a failure to start.

Additionally, operating the APU with an ice-laden inlet can create hazardous conditions, both for the APU itself and for the surrounding equipment. It may also increase the risk of ice shedding during operation, which could potentially damage aircraft systems or pose a risk to personnel nearby. Therefore, ensuring that the inlet is free of ice is essential before attempting any operation of the APU. This precaution helps maintain the reliability and safety of the aircraft's systems.