What indicates an expanded chemical oxygen generator?

The indication of an expanded chemical oxygen generator is marked by a heat-sensitive paint mark that changes color. This feature is specifically designed to provide a clear visual cue that the generator has been activated and is functioning correctly.

The use of heat-sensitive paint provides a reliable way to indicate that the generator has reached the temperatures necessary for oxygen production. This is important for safety and operation, as it allows flight crew members to quickly assess the status of the chemical oxygen generator during an in-flight emergency or a situation where supplemental oxygen might be necessary.

In contrast, other options lack the specific and clear indication that a color-changing paint provides. A blinking light or sound alert might be used in various safety systems, but they are not typical indicators associated specifically with chemical oxygen generators. Similarly, a visible smoke signal, while it may appear alarming, is not a standard method for indicating the readiness or activation of such equipment.

Understanding these operational indicators is fundamental for flight engineers and crew members to ensure the safety and effectiveness of emergency oxygen systems in their aircraft.