What is the primary use of a crash axe on an aircraft?

The primary use of a crash axe on an aircraft is to find a source of fire. In emergency situations, especially during an incident involving smoke or fire, it is essential for crew members to access areas within the aircraft quickly and safely. The crash axe is designed to break through barriers, such as overhead compartments or walls, to locate and potentially extinguish hidden fires. This tool provides both cutting and prying capabilities, making it vital for emergency responders to gain access to compromised areas efficiently.

While controlling cabin temperature, securing luggage, and cutting safety belts are relevant to aircraft operation and safety, they do not align with the specific purpose and functionality of the crash axe in emergency scenarios. Understanding the correct application of equipment like the crash axe is critical for effective response during in-flight emergencies.