What safety measure must be taken when cross bleeding an engine?

When cross bleeding an engine, ensuring that safeties are in place is crucial for maintaining operational security and preventing accidents. Cross bleeding involves redirecting bleed air from one engine to another, which can create specific risks such as engine failure or fuel leaks. By having appropriate safeties in place, such as ensuring all systems are monitored and that any potential hazards are addressed, the chances of incidents are minimized during this procedure.

This measure is essential because it encompasses the verification that equipment is functioning properly, there are no obstructions, and personnel are safely positioned, thereby creating a controlled environment when engaging in what can be a complex operation. Properly ensuring that safety measures are in place protects both the crew and the aircraft from potential dangers associated with cross bleeding operations.