What is the maximum APU start temperature for the ERJ 170/175?

The maximum APU start temperature for the ERJ 170/175 is specified to be 1032 degrees Celsius. This limitation is critical as it ensures the safe and reliable operation of the auxiliary power unit (APU), which is key for providing electrical power and air conditioning while the aircraft is on the ground and for starting the main engines.

Exceeding this temperature limit during APU start can lead to potential damage to the APU, impacting its performance and leading to costly repairs or operational delays. Adhering to established temperature limits is a fundamental aspect of operating within the aircraft's designed safety parameters, ensuring both safety and operational integrity.

The other choices present temperatures that exceed the established limit, which could suggest a misunderstanding of the operational guidelines set forth in the manufacturer's documentation. Understanding these limitations helps reinforce the importance of conducting APU operations within specific thresholds for optimal safety and efficiency.