What is the maximum continuous EGT for operated APU?

The maximum continuous exhaust gas temperature (EGT) for an operating Auxiliary Power Unit (APU) is crucial for maintaining the integrity and performance of the unit. In the context of the C-5 APU, a maximum continuous EGT of 691°C is specified. This temperature threshold is determined based on the design and material specifications of the APU components, ensuring safe operation and preventing damage due to excessive heat.

It is essential for operators to monitor EGT closely because exceeding this temperature can lead to component failures, shortened service life, and potentially hazardous situations. Maintaining operation within the specified EGT limits assists in optimizing efficiency and reliability, thus ensuring the APU functions effectively for ground power and air conditioning when the main engines are not running. Understanding these limits is vital for safe APU operation and overall aircraft maintenance practices.