At what bleed air temperature does the OBOGS TEMP annunciator illuminate?

The OBOGS TEMP annunciator illuminates at a bleed air temperature of 200 degrees Fahrenheit. This is important because it serves as a critical threshold indicating that the oxygen system's temperature is exceeding acceptable limits, which could potentially compromise the effectiveness of the On-Board Oxygen Generating System (OBOGS). If the bleed air temperature rises to this level, it signals the need for immediate attention to ensure crew safety and system integrity.

Recognizing this temperature is crucial for pilots and maintenance personnel, as it helps in preventing scenarios that could lead to equipment malfunctions or unsafe operating conditions. Monitoring bleed air temperature is a fundamental part of aircraft operations, particularly in situations that require high altitudes or prolonged use of oxygen systems.