What happens when bleed air temperature exceeds 300 F?

When the temperature of bleed air exceeds 300 degrees Fahrenheit, the correct response is that the amber DUCT TEMP annunciator illuminates. This alert serves as a warning to the pilot or crew about the elevated temperature condition, which could affect the performance of the system and necessitate further investigation or action.

The illumination of the amber DUCT TEMP annunciator is an important safety feature designed to keep the crew informed of potentially hazardous system conditions. It emphasizes the need to monitor system parameters closely to ensure the safety and efficiency of aircraft operations. Managing bleed air temperature is crucial because excessive temperatures can lead to system malfunctions or performance degradation.

Understanding this relationship is fundamental in systems training, as it underscores the importance of monitoring system temperatures and responding appropriately to alerts, which are critical for maintaining aircraft safety and performance.